public interface DatabaseMetaData extends Wrapper
This interface is implemented by driver vendors to let users know the capabilities of a Database Management System (DBMS) in combination with the driver based on JDBC™ technology ("JDBC driver") that is used with it. Different relational DBMSs often support different features, implement features in different ways, and use different data types. In addition, a driver may implement a feature on top of what the DBMS offers. Information returned by methods in this interface applies to the capabilities of a particular driver and a particular DBMS working together. Note that as used in this documentation, the term "database" is used generically to refer to both the driver and DBMS.
A user for this interface is commonly a tool that needs to discover how to
deal with the underlying DBMS. This is especially true for applications
that are intended to be used with more than one DBMS. For example, a tool might use the method
getTypeInfo
to find out what data types can be used in a
CREATE TABLE
statement. Or a user might call the method
supportsCorrelatedSubqueries
to see if it is possible to use
a correlated subquery or supportsBatchUpdates
to see if it is
possible to use batch updates.
Some DatabaseMetaData
methods return lists of information
in the form of ResultSet
objects.
Regular ResultSet
methods, such as
getString
and getInt
, can be used
to retrieve the data from these ResultSet
objects. If
a given form of metadata is not available, an empty ResultSet
will be returned. Additional columns beyond the columns defined to be
returned by the ResultSet
object for a given method
can be defined by the JDBC driver vendor and must be accessed
by their column label.
Some DatabaseMetaData
methods take arguments that are
String patterns. These arguments all have names such as fooPattern.
Within a pattern String, "%" means match any substring of 0 or more
characters, and "_" means match any one character. Only metadata
entries matching the search pattern are returned. If a search pattern
argument is set to null
, that argument's criterion will
be dropped from the search.
Modifier and Type | Field and Description |
---|---|
static short |
attributeNoNulls
Indicates that
NULL values might not be allowed. |
static short |
attributeNullable
Indicates that
NULL values are definitely allowed. |
static short |
attributeNullableUnknown
Indicates that whether
NULL values are allowed is not
known. |
static int |
bestRowNotPseudo
Indicates that the best row identifier is NOT a pseudo column.
|
static int |
bestRowPseudo
Indicates that the best row identifier is a pseudo column.
|
static int |
bestRowSession
Indicates that the scope of the best row identifier is
the remainder of the current session.
|
static int |
bestRowTemporary
Indicates that the scope of the best row identifier is
very temporary, lasting only while the
row is being used.
|
static int |
bestRowTransaction
Indicates that the scope of the best row identifier is
the remainder of the current transaction.
|
static int |
bestRowUnknown
Indicates that the best row identifier may or may not be a pseudo column.
|
static int |
columnNoNulls
Indicates that the column might not allow
NULL values. |
static int |
columnNullable
Indicates that the column definitely allows
NULL values. |
static int |
columnNullableUnknown
Indicates that the nullability of columns is unknown.
|
static int |
functionColumnIn
Indicates that the parameter or column is an IN parameter.
|
static int |
functionColumnInOut
Indicates that the parameter or column is an INOUT parameter.
|
static int |
functionColumnOut
Indicates that the parameter or column is an OUT parameter.
|
static int |
functionColumnResult
Indicates that the parameter or column is a column in a result set.
|
static int |
functionColumnUnknown
Indicates that type of the parameter or column is unknown.
|
static int |
functionNoNulls
Indicates that
NULL values are not allowed. |
static int |
functionNoTable
Indicates that the function does not return a table.
|
static int |
functionNullable
Indicates that
NULL values are allowed. |
static int |
functionNullableUnknown
Indicates that whether
NULL values are allowed
is unknown. |
static int |
functionResultUnknown
Indicates that it is not known whether the function returns
a result or a table.
|
static int |
functionReturn
Indicates that the parameter or column is a return value.
|
static int |
functionReturnsTable
Indicates that the function returns a table.
|
static int |
importedKeyCascade
For the column
UPDATE_RULE ,
indicates that
when the primary key is updated, the foreign key (imported key)
is changed to agree with it. |
static int |
importedKeyInitiallyDeferred
Indicates deferrability.
|
static int |
importedKeyInitiallyImmediate
Indicates deferrability.
|
static int |
importedKeyNoAction
For the columns
UPDATE_RULE
and DELETE_RULE , indicates that
if the primary key has been imported, it cannot be updated or deleted. |
static int |
importedKeyNotDeferrable
Indicates deferrability.
|
static int |
importedKeyRestrict
For the column
UPDATE_RULE , indicates that
a primary key may not be updated if it has been imported by
another table as a foreign key. |
static int |
importedKeySetDefault
For the columns
UPDATE_RULE
and DELETE_RULE , indicates that
if the primary key is updated or deleted, the foreign key (imported key)
is set to the default value. |
static int |
importedKeySetNull
For the columns
UPDATE_RULE
and DELETE_RULE , indicates that
when the primary key is updated or deleted, the foreign key (imported key)
is changed to NULL . |
static int |
procedureColumnIn
Indicates that the column stores IN parameters.
|
static int |
procedureColumnInOut
Indicates that the column stores INOUT parameters.
|
static int |
procedureColumnOut
Indicates that the column stores OUT parameters.
|
static int |
procedureColumnResult
Indicates that the column stores results.
|
static int |
procedureColumnReturn
Indicates that the column stores return values.
|
static int |
procedureColumnUnknown
Indicates that type of the column is unknown.
|
static int |
procedureNoNulls
Indicates that
NULL values are not allowed. |
static int |
procedureNoResult
Indicates that the procedure does not return a result.
|
static int |
procedureNullable
Indicates that
NULL values are allowed. |
static int |
procedureNullableUnknown
Indicates that whether
NULL values are allowed
is unknown. |
static int |
procedureResultUnknown
Indicates that it is not known whether the procedure returns
a result.
|
static int |
procedureReturnsResult
Indicates that the procedure returns a result.
|
static int |
sqlStateSQL
A possible return value for the method
DatabaseMetaData.getSQLStateType which is used to indicate
whether the value returned by the method
SQLException.getSQLState is an SQLSTATE value. |
static int |
sqlStateSQL99
A possible return value for the method
DatabaseMetaData.getSQLStateType which is used to indicate
whether the value returned by the method
SQLException.getSQLState is an SQL99 SQLSTATE value. |
static int |
sqlStateXOpen
A possible return value for the method
DatabaseMetaData.getSQLStateType which is used to indicate
whether the value returned by the method
SQLException.getSQLState is an
X/Open (now know as Open Group) SQL CLI SQLSTATE value. |
static short |
tableIndexClustered
Indicates that this table index is a clustered index.
|
static short |
tableIndexHashed
Indicates that this table index is a hashed index.
|
static short |
tableIndexOther
Indicates that this table index is not a clustered
index, a hashed index, or table statistics;
it is something other than these.
|
static short |
tableIndexStatistic
Indicates that this column contains table statistics that
are returned in conjunction with a table's index descriptions.
|
static int |
typeNoNulls
Indicates that a
NULL value is NOT allowed for this
data type. |
static int |
typeNullable
Indicates that a
NULL value is allowed for this
data type. |
static int |
typeNullableUnknown
Indicates that it is not known whether a
NULL value
is allowed for this data type. |
static int |
typePredBasic
Indicates that the data type can be only be used in
WHERE
search clauses
that do not use LIKE predicates. |
static int |
typePredChar
Indicates that the data type
can be only be used in
WHERE search clauses
that use LIKE predicates. |
static int |
typePredNone
Indicates that
WHERE search clauses are not supported
for this type. |
static int |
typeSearchable
Indicates that all
WHERE search clauses can be
based on this type. |
static int |
versionColumnNotPseudo
Indicates that this version column is NOT a pseudo column.
|
static int |
versionColumnPseudo
Indicates that this version column is a pseudo column.
|
static int |
versionColumnUnknown
Indicates that this version column may or may not be a pseudo column.
|
Modifier and Type | Method and Description |
---|---|
boolean |
allProceduresAreCallable()
Retrieves whether the current user can call all the procedures
returned by the method
getProcedures . |
boolean |
allTablesAreSelectable()
Retrieves whether the current user can use all the tables returned
by the method
getTables in a SELECT
statement. |
boolean |
autoCommitFailureClosesAllResultSets()
Retrieves whether a
SQLException while autoCommit is true indicates
that all open ResultSets are closed, even ones that are holdable. |
boolean |
dataDefinitionCausesTransactionCommit()
Retrieves whether a data definition statement within a transaction forces
the transaction to commit.
|
boolean |
dataDefinitionIgnoredInTransactions()
Retrieves whether this database ignores a data definition statement
within a transaction.
|
boolean |
deletesAreDetected(int type)
Retrieves whether or not a visible row delete can be detected by
calling the method
ResultSet.rowDeleted . |
boolean |
doesMaxRowSizeIncludeBlobs()
Retrieves whether the return value for the method
getMaxRowSize includes the SQL data types
LONGVARCHAR and LONGVARBINARY . |
boolean |
generatedKeyAlwaysReturned()
Retrieves whether a generated key will always be returned if the column
name(s) or index(es) specified for the auto generated key column(s)
are valid and the statement succeeds.
|
ResultSet |
getAttributes(String catalog,
String schemaPattern,
String typeNamePattern,
String attributeNamePattern)
Retrieves a description of the given attribute of the given type
for a user-defined type (UDT) that is available in the given schema
and catalog.
|
ResultSet |
getBestRowIdentifier(String catalog,
String schema,
String table,
int scope,
boolean nullable)
Retrieves a description of a table's optimal set of columns that
uniquely identifies a row.
|
ResultSet |
getCatalogs()
Retrieves the catalog names available in this database.
|
String |
getCatalogSeparator()
Retrieves the
String that this database uses as the
separator between a catalog and table name. |
String |
getCatalogTerm()
Retrieves the database vendor's preferred term for "catalog".
|
ResultSet |
getClientInfoProperties()
Retrieves a list of the client info properties
that the driver supports.
|
ResultSet |
getColumnPrivileges(String catalog,
String schema,
String table,
String columnNamePattern)
Retrieves a description of the access rights for a table's columns.
|
ResultSet |
getColumns(String catalog,
String schemaPattern,
String tableNamePattern,
String columnNamePattern)
Retrieves a description of table columns available in
the specified catalog.
|
Connection |
getConnection()
Retrieves the connection that produced this metadata object.
|
ResultSet |
getCrossReference(String parentCatalog,
String parentSchema,
String parentTable,
String foreignCatalog,
String foreignSchema,
String foreignTable)
Retrieves a description of the foreign key columns in the given foreign key
table that reference the primary key or the columns representing a unique constraint of the parent table (could be the same or a different table).
|
int |
getDatabaseMajorVersion()
Retrieves the major version number of the underlying database.
|
int |
getDatabaseMinorVersion()
Retrieves the minor version number of the underlying database.
|
String |
getDatabaseProductName()
Retrieves the name of this database product.
|
String |
getDatabaseProductVersion()
Retrieves the version number of this database product.
|
int |
getDefaultTransactionIsolation()
Retrieves this database's default transaction isolation level.
|
int |
getDriverMajorVersion()
Retrieves this JDBC driver's major version number.
|
int |
getDriverMinorVersion()
Retrieves this JDBC driver's minor version number.
|
String |
getDriverName()
Retrieves the name of this JDBC driver.
|
String |
getDriverVersion()
Retrieves the version number of this JDBC driver as a
String . |
ResultSet |
getExportedKeys(String catalog,
String schema,
String table)
Retrieves a description of the foreign key columns that reference the
given table's primary key columns (the foreign keys exported by a
table).
|
String |
getExtraNameCharacters()
Retrieves all the "extra" characters that can be used in unquoted
identifier names (those beyond a-z, A-Z, 0-9 and _).
|
ResultSet |
getFunctionColumns(String catalog,
String schemaPattern,
String functionNamePattern,
String columnNamePattern)
Retrieves a description of the given catalog's system or user
function parameters and return type.
|
ResultSet |
getFunctions(String catalog,
String schemaPattern,
String functionNamePattern)
Retrieves a description of the system and user functions available
in the given catalog.
|
String |
getIdentifierQuoteString()
Retrieves the string used to quote SQL identifiers.
|
ResultSet |
getImportedKeys(String catalog,
String schema,
String table)
Retrieves a description of the primary key columns that are
referenced by the given table's foreign key columns (the primary keys
imported by a table).
|
ResultSet |
getIndexInfo(String catalog,
String schema,
String table,
boolean unique,
boolean approximate)
Retrieves a description of the given table's indices and statistics.
|
int |
getJDBCMajorVersion()
Retrieves the major JDBC version number for this
driver.
|
int |
getJDBCMinorVersion()
Retrieves the minor JDBC version number for this
driver.
|
int |
getMaxBinaryLiteralLength()
Retrieves the maximum number of hex characters this database allows in an
inline binary literal.
|
int |
getMaxCatalogNameLength()
Retrieves the maximum number of characters that this database allows in a
catalog name.
|
int |
getMaxCharLiteralLength()
Retrieves the maximum number of characters this database allows
for a character literal.
|
int |
getMaxColumnNameLength()
Retrieves the maximum number of characters this database allows
for a column name.
|
int |
getMaxColumnsInGroupBy()
Retrieves the maximum number of columns this database allows in a
GROUP BY clause. |
int |
getMaxColumnsInIndex()
Retrieves the maximum number of columns this database allows in an index.
|
int |
getMaxColumnsInOrderBy()
Retrieves the maximum number of columns this database allows in an
ORDER BY clause. |
int |
getMaxColumnsInSelect()
Retrieves the maximum number of columns this database allows in a
SELECT list. |
int |
getMaxColumnsInTable()
Retrieves the maximum number of columns this database allows in a table.
|
int |
getMaxConnections()
Retrieves the maximum number of concurrent connections to this
database that are possible.
|
int |
getMaxCursorNameLength()
Retrieves the maximum number of characters that this database allows in a
cursor name.
|
int |
getMaxIndexLength()
Retrieves the maximum number of bytes this database allows for an
index, including all of the parts of the index.
|
default long |
getMaxLogicalLobSize()
Retrieves the maximum number of bytes this database allows for
the logical size for a
LOB . |
int |
getMaxProcedureNameLength()
Retrieves the maximum number of characters that this database allows in a
procedure name.
|
int |
getMaxRowSize()
Retrieves the maximum number of bytes this database allows in
a single row.
|
int |
getMaxSchemaNameLength()
Retrieves the maximum number of characters that this database allows in a
schema name.
|
int |
getMaxStatementLength()
Retrieves the maximum number of characters this database allows in
an SQL statement.
|
int |
getMaxStatements()
Retrieves the maximum number of active statements to this database
that can be open at the same time.
|
int |
getMaxTableNameLength()
Retrieves the maximum number of characters this database allows in
a table name.
|
int |
getMaxTablesInSelect()
Retrieves the maximum number of tables this database allows in a
SELECT statement. |
int |
getMaxUserNameLength()
Retrieves the maximum number of characters this database allows in
a user name.
|
String |
getNumericFunctions()
Retrieves a comma-separated list of math functions available with
this database.
|
ResultSet |
getPrimaryKeys(String catalog,
String schema,
String table)
Retrieves a description of the given table's primary key columns.
|
ResultSet |
getProcedureColumns(String catalog,
String schemaPattern,
String procedureNamePattern,
String columnNamePattern)
Retrieves a description of the given catalog's stored procedure parameter
and result columns.
|
ResultSet |
getProcedures(String catalog,
String schemaPattern,
String procedureNamePattern)
Retrieves a description of the stored procedures available in the given
catalog.
|
String |
getProcedureTerm()
Retrieves the database vendor's preferred term for "procedure".
|
ResultSet |
getPseudoColumns(String catalog,
String schemaPattern,
String tableNamePattern,
String columnNamePattern)
Retrieves a description of the pseudo or hidden columns available
in a given table within the specified catalog and schema.
|
int |
getResultSetHoldability()
Retrieves this database's default holdability for
ResultSet
objects. |
RowIdLifetime |
getRowIdLifetime()
Indicates whether or not this data source supports the SQL
ROWID type,
and if so the lifetime for which a RowId object remains valid. |
ResultSet |
getSchemas()
Retrieves the schema names available in this database.
|
ResultSet |
getSchemas(String catalog,
String schemaPattern)
Retrieves the schema names available in this database.
|
String |
getSchemaTerm()
Retrieves the database vendor's preferred term for "schema".
|
String |
getSearchStringEscape()
Retrieves the string that can be used to escape wildcard characters.
|
String |
getSQLKeywords()
Retrieves a comma-separated list of all of this database's SQL keywords
that are NOT also SQL:2003 keywords.
|
int |
getSQLStateType()
Indicates whether the SQLSTATE returned by
SQLException.getSQLState
is X/Open (now known as Open Group) SQL CLI or SQL:2003. |
String |
getStringFunctions()
Retrieves a comma-separated list of string functions available with
this database.
|
ResultSet |
getSuperTables(String catalog,
String schemaPattern,
String tableNamePattern)
Retrieves a description of the table hierarchies defined in a particular
schema in this database.
|
ResultSet |
getSuperTypes(String catalog,
String schemaPattern,
String typeNamePattern)
Retrieves a description of the user-defined type (UDT) hierarchies defined in a
particular schema in this database.
|
String |
getSystemFunctions()
Retrieves a comma-separated list of system functions available with
this database.
|
ResultSet |
getTablePrivileges(String catalog,
String schemaPattern,
String tableNamePattern)
Retrieves a description of the access rights for each table available
in a catalog.
|
ResultSet |
getTables(String catalog,
String schemaPattern,
String tableNamePattern,
String[] types)
Retrieves a description of the tables available in the given catalog.
|
ResultSet |
getTableTypes()
Retrieves the table types available in this database.
|
String |
getTimeDateFunctions()
Retrieves a comma-separated list of the time and date functions available
with this database.
|
ResultSet |
getTypeInfo()
Retrieves a description of all the data types supported by
this database.
|
ResultSet |
getUDTs(String catalog,
String schemaPattern,
String typeNamePattern,
int[] types)
Retrieves a description of the user-defined types (UDTs) defined
in a particular schema.
|
String |
getURL()
Retrieves the URL for this DBMS.
|
String |
getUserName()
Retrieves the user name as known to this database.
|
ResultSet |
getVersionColumns(String catalog,
String schema,
String table)
Retrieves a description of a table's columns that are automatically
updated when any value in a row is updated.
|
boolean |
insertsAreDetected(int type)
Retrieves whether or not a visible row insert can be detected
by calling the method
ResultSet.rowInserted . |
boolean |
isCatalogAtStart()
Retrieves whether a catalog appears at the start of a fully qualified
table name.
|
boolean |
isReadOnly()
Retrieves whether this database is in read-only mode.
|
boolean |
locatorsUpdateCopy()
Indicates whether updates made to a LOB are made on a copy or directly
to the LOB.
|
boolean |
nullPlusNonNullIsNull()
Retrieves whether this database supports concatenations between
NULL and non-NULL values being
NULL . |
boolean |
nullsAreSortedAtEnd()
Retrieves whether
NULL values are sorted at the end regardless of
sort order. |
boolean |
nullsAreSortedAtStart()
Retrieves whether
NULL values are sorted at the start regardless
of sort order. |
boolean |
nullsAreSortedHigh()
Retrieves whether
NULL values are sorted high. |
boolean |
nullsAreSortedLow()
Retrieves whether
NULL values are sorted low. |
boolean |
othersDeletesAreVisible(int type)
Retrieves whether deletes made by others are visible.
|
boolean |
othersInsertsAreVisible(int type)
Retrieves whether inserts made by others are visible.
|
boolean |
othersUpdatesAreVisible(int type)
Retrieves whether updates made by others are visible.
|
boolean |
ownDeletesAreVisible(int type)
Retrieves whether a result set's own deletes are visible.
|
boolean |
ownInsertsAreVisible(int type)
Retrieves whether a result set's own inserts are visible.
|
boolean |
ownUpdatesAreVisible(int type)
Retrieves whether for the given type of
ResultSet object,
the result set's own updates are visible. |
boolean |
storesLowerCaseIdentifiers()
Retrieves whether this database treats mixed case unquoted SQL identifiers as
case insensitive and stores them in lower case.
|
boolean |
storesLowerCaseQuotedIdentifiers()
Retrieves whether this database treats mixed case quoted SQL identifiers as
case insensitive and stores them in lower case.
|
boolean |
storesMixedCaseIdentifiers()
Retrieves whether this database treats mixed case unquoted SQL identifiers as
case insensitive and stores them in mixed case.
|
boolean |
storesMixedCaseQuotedIdentifiers()
Retrieves whether this database treats mixed case quoted SQL identifiers as
case insensitive and stores them in mixed case.
|
boolean |
storesUpperCaseIdentifiers()
Retrieves whether this database treats mixed case unquoted SQL identifiers as
case insensitive and stores them in upper case.
|
boolean |
storesUpperCaseQuotedIdentifiers()
Retrieves whether this database treats mixed case quoted SQL identifiers as
case insensitive and stores them in upper case.
|
boolean |
supportsAlterTableWithAddColumn()
Retrieves whether this database supports
ALTER TABLE
with add column. |
boolean |
supportsAlterTableWithDropColumn()
Retrieves whether this database supports
ALTER TABLE
with drop column. |
boolean |
supportsANSI92EntryLevelSQL()
Retrieves whether this database supports the ANSI92 entry level SQL
grammar.
|
boolean |
supportsANSI92FullSQL()
Retrieves whether this database supports the ANSI92 full SQL grammar supported.
|
boolean |
supportsANSI92IntermediateSQL()
Retrieves whether this database supports the ANSI92 intermediate SQL grammar supported.
|
boolean |
supportsBatchUpdates()
Retrieves whether this database supports batch updates.
|
boolean |
supportsCatalogsInDataManipulation()
Retrieves whether a catalog name can be used in a data manipulation statement.
|
boolean |
supportsCatalogsInIndexDefinitions()
Retrieves whether a catalog name can be used in an index definition statement.
|
boolean |
supportsCatalogsInPrivilegeDefinitions()
Retrieves whether a catalog name can be used in a privilege definition statement.
|
boolean |
supportsCatalogsInProcedureCalls()
Retrieves whether a catalog name can be used in a procedure call statement.
|
boolean |
supportsCatalogsInTableDefinitions()
Retrieves whether a catalog name can be used in a table definition statement.
|
boolean |
supportsColumnAliasing()
Retrieves whether this database supports column aliasing.
|
boolean |
supportsConvert()
Retrieves whether this database supports the JDBC scalar function
CONVERT for the conversion of one JDBC type to another. |
boolean |
supportsConvert(int fromType,
int toType)
Retrieves whether this database supports the JDBC scalar function
CONVERT for conversions between the JDBC types fromType
and toType. |
boolean |
supportsCoreSQLGrammar()
Retrieves whether this database supports the ODBC Core SQL grammar.
|
boolean |
supportsCorrelatedSubqueries()
Retrieves whether this database supports correlated subqueries.
|
boolean |
supportsDataDefinitionAndDataManipulationTransactions()
Retrieves whether this database supports both data definition and
data manipulation statements within a transaction.
|
boolean |
supportsDataManipulationTransactionsOnly()
Retrieves whether this database supports only data manipulation
statements within a transaction.
|
boolean |
supportsDifferentTableCorrelationNames()
Retrieves whether, when table correlation names are supported, they
are restricted to being different from the names of the tables.
|
boolean |
supportsExpressionsInOrderBy()
Retrieves whether this database supports expressions in
ORDER BY lists. |
boolean |
supportsExtendedSQLGrammar()
Retrieves whether this database supports the ODBC Extended SQL grammar.
|
boolean |
supportsFullOuterJoins()
Retrieves whether this database supports full nested outer joins.
|
boolean |
supportsGetGeneratedKeys()
Retrieves whether auto-generated keys can be retrieved after
a statement has been executed
|
boolean |
supportsGroupBy()
Retrieves whether this database supports some form of
GROUP BY clause. |
boolean |
supportsGroupByBeyondSelect()
Retrieves whether this database supports using columns not included in
the
SELECT statement in a GROUP BY clause
provided that all of the columns in the SELECT statement
are included in the GROUP BY clause. |
boolean |
supportsGroupByUnrelated()
Retrieves whether this database supports using a column that is
not in the
SELECT statement in a
GROUP BY clause. |
boolean |
supportsIntegrityEnhancementFacility()
Retrieves whether this database supports the SQL Integrity
Enhancement Facility.
|
boolean |
supportsLikeEscapeClause()
Retrieves whether this database supports specifying a
LIKE escape clause. |
boolean |
supportsLimitedOuterJoins()
Retrieves whether this database provides limited support for outer
joins.
|
boolean |
supportsMinimumSQLGrammar()
Retrieves whether this database supports the ODBC Minimum SQL grammar.
|
boolean |
supportsMixedCaseIdentifiers()
Retrieves whether this database treats mixed case unquoted SQL identifiers as
case sensitive and as a result stores them in mixed case.
|
boolean |
supportsMixedCaseQuotedIdentifiers()
Retrieves whether this database treats mixed case quoted SQL identifiers as
case sensitive and as a result stores them in mixed case.
|
boolean |
supportsMultipleOpenResults()
Retrieves whether it is possible to have multiple
ResultSet objects
returned from a CallableStatement object
simultaneously. |
boolean |
supportsMultipleResultSets()
Retrieves whether this database supports getting multiple
ResultSet objects from a single call to the
method execute . |
boolean |
supportsMultipleTransactions()
Retrieves whether this database allows having multiple
transactions open at once (on different connections).
|
boolean |
supportsNamedParameters()
Retrieves whether this database supports named parameters to callable
statements.
|
boolean |
supportsNonNullableColumns()
Retrieves whether columns in this database may be defined as non-nullable.
|
boolean |
supportsOpenCursorsAcrossCommit()
Retrieves whether this database supports keeping cursors open
across commits.
|
boolean |
supportsOpenCursorsAcrossRollback()
Retrieves whether this database supports keeping cursors open
across rollbacks.
|
boolean |
supportsOpenStatementsAcrossCommit()
Retrieves whether this database supports keeping statements open
across commits.
|
boolean |
supportsOpenStatementsAcrossRollback()
Retrieves whether this database supports keeping statements open
across rollbacks.
|
boolean |
supportsOrderByUnrelated()
Retrieves whether this database supports using a column that is
not in the
SELECT statement in an
ORDER BY clause. |
boolean |
supportsOuterJoins()
Retrieves whether this database supports some form of outer join.
|
boolean |
supportsPositionedDelete()
Retrieves whether this database supports positioned
DELETE
statements. |
boolean |
supportsPositionedUpdate()
Retrieves whether this database supports positioned
UPDATE
statements. |
default boolean |
supportsRefCursors()
Retrieves whether this database supports REF CURSOR.
|
boolean |
supportsResultSetConcurrency(int type,
int concurrency)
Retrieves whether this database supports the given concurrency type
in combination with the given result set type.
|
boolean |
supportsResultSetHoldability(int holdability)
Retrieves whether this database supports the given result set holdability.
|
boolean |
supportsResultSetType(int type)
Retrieves whether this database supports the given result set type.
|
boolean |
supportsSavepoints()
Retrieves whether this database supports savepoints.
|
boolean |
supportsSchemasInDataManipulation()
Retrieves whether a schema name can be used in a data manipulation statement.
|
boolean |
supportsSchemasInIndexDefinitions()
Retrieves whether a schema name can be used in an index definition statement.
|
boolean |
supportsSchemasInPrivilegeDefinitions()
Retrieves whether a schema name can be used in a privilege definition statement.
|
boolean |
supportsSchemasInProcedureCalls()
Retrieves whether a schema name can be used in a procedure call statement.
|
boolean |
supportsSchemasInTableDefinitions()
Retrieves whether a schema name can be used in a table definition statement.
|
boolean |
supportsSelectForUpdate()
Retrieves whether this database supports
SELECT FOR UPDATE
statements. |
boolean |
supportsStatementPooling()
Retrieves whether this database supports statement pooling.
|
boolean |
supportsStoredFunctionsUsingCallSyntax()
Retrieves whether this database supports invoking user-defined or vendor functions
using the stored procedure escape syntax.
|
boolean |
supportsStoredProcedures()
Retrieves whether this database supports stored procedure calls
that use the stored procedure escape syntax.
|
boolean |
supportsSubqueriesInComparisons()
Retrieves whether this database supports subqueries in comparison
expressions.
|
boolean |
supportsSubqueriesInExists()
Retrieves whether this database supports subqueries in
EXISTS expressions. |
boolean |
supportsSubqueriesInIns()
Retrieves whether this database supports subqueries in
IN expressions. |
boolean |
supportsSubqueriesInQuantifieds()
Retrieves whether this database supports subqueries in quantified
expressions.
|
boolean |
supportsTableCorrelationNames()
Retrieves whether this database supports table correlation names.
|
boolean |
supportsTransactionIsolationLevel(int level)
Retrieves whether this database supports the given transaction isolation level.
|
boolean |
supportsTransactions()
Retrieves whether this database supports transactions.
|
boolean |
supportsUnion()
Retrieves whether this database supports SQL
UNION . |
boolean |
supportsUnionAll()
Retrieves whether this database supports SQL
UNION ALL . |
boolean |
updatesAreDetected(int type)
Retrieves whether or not a visible row update can be detected by
calling the method
ResultSet.rowUpdated . |
boolean |
usesLocalFilePerTable()
Retrieves whether this database uses a file for each table.
|
boolean |
usesLocalFiles()
Retrieves whether this database stores tables in a local file.
|
isWrapperFor, unwrap
static final int procedureResultUnknown
A possible value for column PROCEDURE_TYPE
in the
ResultSet
object returned by the method
getProcedures
.
static final int procedureNoResult
A possible value for column PROCEDURE_TYPE
in the
ResultSet
object returned by the method
getProcedures
.
static final int procedureReturnsResult
A possible value for column PROCEDURE_TYPE
in the
ResultSet
object returned by the method
getProcedures
.
static final int procedureColumnUnknown
A possible value for the column
COLUMN_TYPE
in the ResultSet
returned by the method getProcedureColumns
.
static final int procedureColumnIn
A possible value for the column
COLUMN_TYPE
in the ResultSet
returned by the method getProcedureColumns
.
static final int procedureColumnInOut
A possible value for the column
COLUMN_TYPE
in the ResultSet
returned by the method getProcedureColumns
.
static final int procedureColumnOut
A possible value for the column
COLUMN_TYPE
in the ResultSet
returned by the method getProcedureColumns
.
static final int procedureColumnReturn
A possible value for the column
COLUMN_TYPE
in the ResultSet
returned by the method getProcedureColumns
.
static final int procedureColumnResult
A possible value for the column
COLUMN_TYPE
in the ResultSet
returned by the method getProcedureColumns
.
static final int procedureNoNulls
NULL
values are not allowed.
A possible value for the column
NULLABLE
in the ResultSet
object
returned by the method getProcedureColumns
.
static final int procedureNullable
NULL
values are allowed.
A possible value for the column
NULLABLE
in the ResultSet
object
returned by the method getProcedureColumns
.
static final int procedureNullableUnknown
NULL
values are allowed
is unknown.
A possible value for the column
NULLABLE
in the ResultSet
object
returned by the method getProcedureColumns
.
static final int columnNoNulls
NULL
values.
A possible value for the column
NULLABLE
in the ResultSet
returned by the method
getColumns
.
static final int columnNullable
NULL
values.
A possible value for the column
NULLABLE
in the ResultSet
returned by the method
getColumns
.
static final int columnNullableUnknown
A possible value for the column
NULLABLE
in the ResultSet
returned by the method
getColumns
.
static final int bestRowTemporary
A possible value for the column
SCOPE
in the ResultSet
object
returned by the method getBestRowIdentifier
.
static final int bestRowTransaction
A possible value for the column
SCOPE
in the ResultSet
object
returned by the method getBestRowIdentifier
.
static final int bestRowSession
A possible value for the column
SCOPE
in the ResultSet
object
returned by the method getBestRowIdentifier
.
static final int bestRowUnknown
A possible value for the column
PSEUDO_COLUMN
in the ResultSet
object
returned by the method getBestRowIdentifier
.
static final int bestRowNotPseudo
A possible value for the column
PSEUDO_COLUMN
in the ResultSet
object
returned by the method getBestRowIdentifier
.
static final int bestRowPseudo
A possible value for the column
PSEUDO_COLUMN
in the ResultSet
object
returned by the method getBestRowIdentifier
.
static final int versionColumnUnknown
A possible value for the column
PSEUDO_COLUMN
in the ResultSet
object
returned by the method getVersionColumns
.
static final int versionColumnNotPseudo
A possible value for the column
PSEUDO_COLUMN
in the ResultSet
object
returned by the method getVersionColumns
.
static final int versionColumnPseudo
A possible value for the column
PSEUDO_COLUMN
in the ResultSet
object
returned by the method getVersionColumns
.
static final int importedKeyCascade
UPDATE_RULE
,
indicates that
when the primary key is updated, the foreign key (imported key)
is changed to agree with it.
For the column DELETE_RULE
,
it indicates that
when the primary key is deleted, rows that imported that key
are deleted.
A possible value for the columns UPDATE_RULE
and DELETE_RULE
in the
ResultSet
objects returned by the methods
getImportedKeys
, getExportedKeys
,
and getCrossReference
.
static final int importedKeyRestrict
UPDATE_RULE
, indicates that
a primary key may not be updated if it has been imported by
another table as a foreign key.
For the column DELETE_RULE
, indicates that
a primary key may not be deleted if it has been imported by
another table as a foreign key.
A possible value for the columns UPDATE_RULE
and DELETE_RULE
in the
ResultSet
objects returned by the methods
getImportedKeys
, getExportedKeys
,
and getCrossReference
.
static final int importedKeySetNull
UPDATE_RULE
and DELETE_RULE
, indicates that
when the primary key is updated or deleted, the foreign key (imported key)
is changed to NULL
.
A possible value for the columns UPDATE_RULE
and DELETE_RULE
in the
ResultSet
objects returned by the methods
getImportedKeys
, getExportedKeys
,
and getCrossReference
.
static final int importedKeyNoAction
UPDATE_RULE
and DELETE_RULE
, indicates that
if the primary key has been imported, it cannot be updated or deleted.
A possible value for the columns UPDATE_RULE
and DELETE_RULE
in the
ResultSet
objects returned by the methods
getImportedKeys
, getExportedKeys
,
and getCrossReference
.
static final int importedKeySetDefault
UPDATE_RULE
and DELETE_RULE
, indicates that
if the primary key is updated or deleted, the foreign key (imported key)
is set to the default value.
A possible value for the columns UPDATE_RULE
and DELETE_RULE
in the
ResultSet
objects returned by the methods
getImportedKeys
, getExportedKeys
,
and getCrossReference
.
static final int importedKeyInitiallyDeferred
A possible value for the column DEFERRABILITY
in the ResultSet
objects returned by the methods
getImportedKeys
, getExportedKeys
,
and getCrossReference
.
static final int importedKeyInitiallyImmediate
A possible value for the column DEFERRABILITY
in the ResultSet
objects returned by the methods
getImportedKeys
, getExportedKeys
,
and getCrossReference
.
static final int importedKeyNotDeferrable
A possible value for the column DEFERRABILITY
in the ResultSet
objects returned by the methods
getImportedKeys
, getExportedKeys
,
and getCrossReference
.
static final int typeNoNulls
NULL
value is NOT allowed for this
data type.
A possible value for column NULLABLE
in the
ResultSet
object returned by the method
getTypeInfo
.
static final int typeNullable
NULL
value is allowed for this
data type.
A possible value for column NULLABLE
in the
ResultSet
object returned by the method
getTypeInfo
.
static final int typeNullableUnknown
NULL
value
is allowed for this data type.
A possible value for column NULLABLE
in the
ResultSet
object returned by the method
getTypeInfo
.
static final int typePredNone
WHERE
search clauses are not supported
for this type.
A possible value for column SEARCHABLE
in the
ResultSet
object returned by the method
getTypeInfo
.
static final int typePredChar
WHERE
search clauses
that use LIKE
predicates.
A possible value for column SEARCHABLE
in the
ResultSet
object returned by the method
getTypeInfo
.
static final int typePredBasic
WHERE
search clauses
that do not use LIKE
predicates.
A possible value for column SEARCHABLE
in the
ResultSet
object returned by the method
getTypeInfo
.
static final int typeSearchable
WHERE
search clauses can be
based on this type.
A possible value for column SEARCHABLE
in the
ResultSet
object returned by the method
getTypeInfo
.
static final short tableIndexStatistic
A possible value for column TYPE
in the
ResultSet
object returned by the method
getIndexInfo
.
static final short tableIndexClustered
A possible value for column TYPE
in the
ResultSet
object returned by the method
getIndexInfo
.
static final short tableIndexHashed
A possible value for column TYPE
in the
ResultSet
object returned by the method
getIndexInfo
.
static final short tableIndexOther
A possible value for column TYPE
in the
ResultSet
object returned by the method
getIndexInfo
.
static final short attributeNoNulls
NULL
values might not be allowed.
A possible value for the column
NULLABLE
in the ResultSet
object
returned by the method getAttributes
.
static final short attributeNullable
NULL
values are definitely allowed.
A possible value for the column NULLABLE
in the ResultSet
object
returned by the method getAttributes
.
static final short attributeNullableUnknown
NULL
values are allowed is not
known.
A possible value for the column NULLABLE
in the ResultSet
object
returned by the method getAttributes
.
static final int sqlStateXOpen
DatabaseMetaData.getSQLStateType
which is used to indicate
whether the value returned by the method
SQLException.getSQLState
is an
X/Open (now know as Open Group) SQL CLI SQLSTATE value.
static final int sqlStateSQL
DatabaseMetaData.getSQLStateType
which is used to indicate
whether the value returned by the method
SQLException.getSQLState
is an SQLSTATE value.
static final int sqlStateSQL99
DatabaseMetaData.getSQLStateType
which is used to indicate
whether the value returned by the method
SQLException.getSQLState
is an SQL99 SQLSTATE value.
Note:This constant remains only for compatibility reasons. Developers
should use the constant sqlStateSQL
instead.
static final int functionColumnUnknown
A possible value for the column
COLUMN_TYPE
in the ResultSet
returned by the method getFunctionColumns
.
static final int functionColumnIn
A possible value for the column
COLUMN_TYPE
in the ResultSet
returned by the method getFunctionColumns
.
static final int functionColumnInOut
A possible value for the column
COLUMN_TYPE
in the ResultSet
returned by the method getFunctionColumns
.
static final int functionColumnOut
A possible value for the column
COLUMN_TYPE
in the ResultSet
returned by the method getFunctionColumns
.
static final int functionReturn
A possible value for the column
COLUMN_TYPE
in the ResultSet
returned by the method getFunctionColumns
.
static final int functionColumnResult
A possible value for the column
COLUMN_TYPE
in the ResultSet
returned by the method getFunctionColumns
.
static final int functionNoNulls
NULL
values are not allowed.
A possible value for the column
NULLABLE
in the ResultSet
object
returned by the method getFunctionColumns
.
static final int functionNullable
NULL
values are allowed.
A possible value for the column
NULLABLE
in the ResultSet
object
returned by the method getFunctionColumns
.
static final int functionNullableUnknown
NULL
values are allowed
is unknown.
A possible value for the column
NULLABLE
in the ResultSet
object
returned by the method getFunctionColumns
.
static final int functionResultUnknown
A possible value for column FUNCTION_TYPE
in the
ResultSet
object returned by the method
getFunctions
.
static final int functionNoTable
A possible value for column FUNCTION_TYPE
in the
ResultSet
object returned by the method
getFunctions
.
static final int functionReturnsTable
A possible value for column FUNCTION_TYPE
in the
ResultSet
object returned by the method
getFunctions
.
boolean allProceduresAreCallable() throws SQLException
getProcedures
.true
if so; false
otherwiseSQLException
- if a database access error occursboolean allTablesAreSelectable() throws SQLException
getTables
in a SELECT
statement.true
if so; false
otherwiseSQLException
- if a database access error occursString getURL() throws SQLException
null
if it cannot be
generatedSQLException
- if a database access error occursString getUserName() throws SQLException
SQLException
- if a database access error occursboolean isReadOnly() throws SQLException
true
if so; false
otherwiseSQLException
- if a database access error occursboolean nullsAreSortedHigh() throws SQLException
NULL
values are sorted high.
Sorted high means that NULL
values
sort higher than any other value in a domain. In an ascending order,
if this method returns true
, NULL
values
will appear at the end. By contrast, the method
nullsAreSortedAtEnd
indicates whether NULL
values
are sorted at the end regardless of sort order.true
if so; false
otherwiseSQLException
- if a database access error occursboolean nullsAreSortedLow() throws SQLException
NULL
values are sorted low.
Sorted low means that NULL
values
sort lower than any other value in a domain. In an ascending order,
if this method returns true
, NULL
values
will appear at the beginning. By contrast, the method
nullsAreSortedAtStart
indicates whether NULL
values
are sorted at the beginning regardless of sort order.true
if so; false
otherwiseSQLException
- if a database access error occursboolean nullsAreSortedAtStart() throws SQLException
NULL
values are sorted at the start regardless
of sort order.true
if so; false
otherwiseSQLException
- if a database access error occursboolean nullsAreSortedAtEnd() throws SQLException
NULL
values are sorted at the end regardless of
sort order.true
if so; false
otherwiseSQLException
- if a database access error occursString getDatabaseProductName() throws SQLException
SQLException
- if a database access error occursString getDatabaseProductVersion() throws SQLException
SQLException
- if a database access error occursString getDriverName() throws SQLException
SQLException
- if a database access error occursString getDriverVersion() throws SQLException
String
.SQLException
- if a database access error occursint getDriverMajorVersion()
int getDriverMinorVersion()
boolean usesLocalFiles() throws SQLException
true
if so; false
otherwiseSQLException
- if a database access error occursboolean usesLocalFilePerTable() throws SQLException
true
if this database uses a local file for each table;
false
otherwiseSQLException
- if a database access error occursboolean supportsMixedCaseIdentifiers() throws SQLException
true
if so; false
otherwiseSQLException
- if a database access error occursboolean storesUpperCaseIdentifiers() throws SQLException
true
if so; false
otherwiseSQLException
- if a database access error occursboolean storesLowerCaseIdentifiers() throws SQLException
true
if so; false
otherwiseSQLException
- if a database access error occursboolean storesMixedCaseIdentifiers() throws SQLException
true
if so; false
otherwiseSQLException
- if a database access error occursboolean supportsMixedCaseQuotedIdentifiers() throws SQLException
true
if so; false
otherwiseSQLException
- if a database access error occursboolean storesUpperCaseQuotedIdentifiers() throws SQLException
true
if so; false
otherwiseSQLException
- if a database access error occursboolean storesLowerCaseQuotedIdentifiers() throws SQLException
true
if so; false
otherwiseSQLException
- if a database access error occursboolean storesMixedCaseQuotedIdentifiers() throws SQLException
true
if so; false
otherwiseSQLException
- if a database access error occursString getIdentifierQuoteString() throws SQLException
SQLException
- if a database access error occursString getSQLKeywords() throws SQLException
SQLException
- if a database access error occursString getNumericFunctions() throws SQLException
SQLException
- if a database access error occursString getStringFunctions() throws SQLException
SQLException
- if a database access error occursString getSystemFunctions() throws SQLException
SQLException
- if a database access error occursString getTimeDateFunctions() throws SQLException
SQLException
- if a database access error occursString getSearchStringEscape() throws SQLException
The '_' character represents any single character; the '%' character represents any sequence of zero or more characters.
SQLException
- if a database access error occursString getExtraNameCharacters() throws SQLException
SQLException
- if a database access error occursboolean supportsAlterTableWithAddColumn() throws SQLException
ALTER TABLE
with add column.true
if so; false
otherwiseSQLException
- if a database access error occursboolean supportsAlterTableWithDropColumn() throws SQLException
ALTER TABLE
with drop column.true
if so; false
otherwiseSQLException
- if a database access error occursboolean supportsColumnAliasing() throws SQLException
If so, the SQL AS clause can be used to provide names for computed columns or to provide alias names for columns as required.
true
if so; false
otherwiseSQLException
- if a database access error occursboolean nullPlusNonNullIsNull() throws SQLException
NULL
and non-NULL
values being
NULL
.true
if so; false
otherwiseSQLException
- if a database access error occursboolean supportsConvert() throws SQLException
CONVERT
for the conversion of one JDBC type to another.
The JDBC types are the generic SQL data types defined
in java.sql.Types
.true
if so; false
otherwiseSQLException
- if a database access error occursboolean supportsConvert(int fromType, int toType) throws SQLException
CONVERT
for conversions between the JDBC types fromType
and toType. The JDBC types are the generic SQL data types defined
in java.sql.Types
.fromType
- the type to convert from; one of the type codes from
the class java.sql.Types
toType
- the type to convert to; one of the type codes from
the class java.sql.Types
true
if so; false
otherwiseSQLException
- if a database access error occursTypes
boolean supportsTableCorrelationNames() throws SQLException
true
if so; false
otherwiseSQLException
- if a database access error occursboolean supportsDifferentTableCorrelationNames() throws SQLException
true
if so; false
otherwiseSQLException
- if a database access error occursboolean supportsExpressionsInOrderBy() throws SQLException
ORDER BY
lists.true
if so; false
otherwiseSQLException
- if a database access error occursboolean supportsOrderByUnrelated() throws SQLException
SELECT
statement in an
ORDER BY
clause.true
if so; false
otherwiseSQLException
- if a database access error occursboolean supportsGroupBy() throws SQLException
GROUP BY
clause.true
if so; false
otherwiseSQLException
- if a database access error occursboolean supportsGroupByUnrelated() throws SQLException
SELECT
statement in a
GROUP BY
clause.true
if so; false
otherwiseSQLException
- if a database access error occursboolean supportsGroupByBeyondSelect() throws SQLException
SELECT
statement in a GROUP BY
clause
provided that all of the columns in the SELECT
statement
are included in the GROUP BY
clause.true
if so; false
otherwiseSQLException
- if a database access error occursboolean supportsLikeEscapeClause() throws SQLException
LIKE
escape clause.true
if so; false
otherwiseSQLException
- if a database access error occursboolean supportsMultipleResultSets() throws SQLException
ResultSet
objects from a single call to the
method execute
.true
if so; false
otherwiseSQLException
- if a database access error occursboolean supportsMultipleTransactions() throws SQLException
true
if so; false
otherwiseSQLException
- if a database access error occursboolean supportsNonNullableColumns() throws SQLException
true
if so; false
otherwiseSQLException
- if a database access error occursboolean supportsMinimumSQLGrammar() throws SQLException
true
if so; false
otherwiseSQLException
- if a database access error occursboolean supportsCoreSQLGrammar() throws SQLException
true
if so; false
otherwiseSQLException
- if a database access error occursboolean supportsExtendedSQLGrammar() throws SQLException
true
if so; false
otherwiseSQLException
- if a database access error occursboolean supportsANSI92EntryLevelSQL() throws SQLException
true
if so; false
otherwiseSQLException
- if a database access error occursboolean supportsANSI92IntermediateSQL() throws SQLException
true
if so; false
otherwiseSQLException
- if a database access error occursboolean supportsANSI92FullSQL() throws SQLException
true
if so; false
otherwiseSQLException
- if a database access error occursboolean supportsIntegrityEnhancementFacility() throws SQLException
true
if so; false
otherwiseSQLException
- if a database access error occursboolean supportsOuterJoins() throws SQLException
true
if so; false
otherwiseSQLException
- if a database access error occursboolean supportsFullOuterJoins() throws SQLException
true
if so; false
otherwiseSQLException
- if a database access error occursboolean supportsLimitedOuterJoins() throws SQLException
true
if the method
supportsFullOuterJoins
returns true
).true
if so; false
otherwiseSQLException
- if a database access error occursString getSchemaTerm() throws SQLException
SQLException
- if a database access error occursString getProcedureTerm() throws SQLException
SQLException
- if a database access error occursString getCatalogTerm() throws SQLException
SQLException
- if a database access error occursboolean isCatalogAtStart() throws SQLException
true
if the catalog name appears at the beginning
of a fully qualified table name; false
otherwiseSQLException
- if a database access error occursString getCatalogSeparator() throws SQLException
String
that this database uses as the
separator between a catalog and table name.SQLException
- if a database access error occursboolean supportsSchemasInDataManipulation() throws SQLException
true
if so; false
otherwiseSQLException
- if a database access error occursboolean supportsSchemasInProcedureCalls() throws SQLException
true
if so; false
otherwiseSQLException
- if a database access error occursboolean supportsSchemasInTableDefinitions() throws SQLException
true
if so; false
otherwiseSQLException
- if a database access error occursboolean supportsSchemasInIndexDefinitions() throws SQLException
true
if so; false
otherwiseSQLException
- if a database access error occursboolean supportsSchemasInPrivilegeDefinitions() throws SQLException
true
if so; false
otherwiseSQLException
- if a database access error occursboolean supportsCatalogsInDataManipulation() throws SQLException
true
if so; false
otherwiseSQLException
- if a database access error occursboolean supportsCatalogsInProcedureCalls() throws SQLException
true
if so; false
otherwiseSQLException
- if a database access error occursboolean supportsCatalogsInTableDefinitions() throws SQLException
true
if so; false
otherwiseSQLException
- if a database access error occursboolean supportsCatalogsInIndexDefinitions() throws SQLException
true
if so; false
otherwiseSQLException
- if a database access error occursboolean supportsCatalogsInPrivilegeDefinitions() throws SQLException
true
if so; false
otherwiseSQLException
- if a database access error occursboolean supportsPositionedDelete() throws SQLException
DELETE
statements.true
if so; false
otherwiseSQLException
- if a database access error occursboolean supportsPositionedUpdate() throws SQLException
UPDATE
statements.true
if so; false
otherwiseSQLException
- if a database access error occursboolean supportsSelectForUpdate() throws SQLException
SELECT FOR UPDATE
statements.true
if so; false
otherwiseSQLException
- if a database access error occursboolean supportsStoredProcedures() throws SQLException
true
if so; false
otherwiseSQLException
- if a database access error occursboolean supportsSubqueriesInComparisons() throws SQLException
true
if so; false
otherwiseSQLException
- if a database access error occursboolean supportsSubqueriesInExists() throws SQLException
EXISTS
expressions.true
if so; false
otherwiseSQLException
- if a database access error occursboolean supportsSubqueriesInIns() throws SQLException
IN
expressions.true
if so; false
otherwiseSQLException
- if a database access error occursboolean supportsSubqueriesInQuantifieds() throws SQLException
true
if so; false
otherwiseSQLException
- if a database access error occursboolean supportsCorrelatedSubqueries() throws SQLException
true
if so; false
otherwiseSQLException
- if a database access error occursboolean supportsUnion() throws SQLException
UNION
.true
if so; false
otherwiseSQLException
- if a database access error occursboolean supportsUnionAll() throws SQLException
UNION ALL
.true
if so; false
otherwiseSQLException
- if a database access error occursboolean supportsOpenCursorsAcrossCommit() throws SQLException
true
if cursors always remain open;
false
if they might not remain openSQLException
- if a database access error occursboolean supportsOpenCursorsAcrossRollback() throws SQLException
true
if cursors always remain open;
false
if they might not remain openSQLException
- if a database access error occursboolean supportsOpenStatementsAcrossCommit() throws SQLException
true
if statements always remain open;
false
if they might not remain openSQLException
- if a database access error occursboolean supportsOpenStatementsAcrossRollback() throws SQLException
true
if statements always remain open;
false
if they might not remain openSQLException
- if a database access error occursint getMaxBinaryLiteralLength() throws SQLException
SQLException
- if a database access error occursint getMaxCharLiteralLength() throws SQLException
SQLException
- if a database access error occursint getMaxColumnNameLength() throws SQLException
SQLException
- if a database access error occursint getMaxColumnsInGroupBy() throws SQLException
GROUP BY
clause.SQLException
- if a database access error occursint getMaxColumnsInIndex() throws SQLException
SQLException
- if a database access error occursint getMaxColumnsInOrderBy() throws SQLException
ORDER BY
clause.SQLException
- if a database access error occursint getMaxColumnsInSelect() throws SQLException
SELECT
list.SQLException
- if a database access error occursint getMaxColumnsInTable() throws SQLException
SQLException
- if a database access error occursint getMaxConnections() throws SQLException
SQLException
- if a database access error occursint getMaxCursorNameLength() throws SQLException
SQLException
- if a database access error occursint getMaxIndexLength() throws SQLException
SQLException
- if a database access error occursint getMaxSchemaNameLength() throws SQLException
SQLException
- if a database access error occursint getMaxProcedureNameLength() throws SQLException
SQLException
- if a database access error occursint getMaxCatalogNameLength() throws SQLException
SQLException
- if a database access error occursint getMaxRowSize() throws SQLException
SQLException
- if a database access error occursboolean doesMaxRowSizeIncludeBlobs() throws SQLException
getMaxRowSize
includes the SQL data types
LONGVARCHAR
and LONGVARBINARY
.true
if so; false
otherwiseSQLException
- if a database access error occursint getMaxStatementLength() throws SQLException
SQLException
- if a database access error occursint getMaxStatements() throws SQLException
SQLException
- if a database access error occursint getMaxTableNameLength() throws SQLException
SQLException
- if a database access error occursint getMaxTablesInSelect() throws SQLException
SELECT
statement.SELECT
statement; a result of zero means that there is no limit or
the limit is not knownSQLException
- if a database access error occursint getMaxUserNameLength() throws SQLException
SQLException
- if a database access error occursint getDefaultTransactionIsolation() throws SQLException
java.sql.Connection
.SQLException
- if a database access error occursConnection
boolean supportsTransactions() throws SQLException
commit
is a noop, and the isolation level is
TRANSACTION_NONE
.true
if transactions are supported;
false
otherwiseSQLException
- if a database access error occursboolean supportsTransactionIsolationLevel(int level) throws SQLException
level
- one of the transaction isolation levels defined in
java.sql.Connection
true
if so; false
otherwiseSQLException
- if a database access error occursConnection
boolean supportsDataDefinitionAndDataManipulationTransactions() throws SQLException
true
if so; false
otherwiseSQLException
- if a database access error occursboolean supportsDataManipulationTransactionsOnly() throws SQLException
true
if so; false
otherwiseSQLException
- if a database access error occursboolean dataDefinitionCausesTransactionCommit() throws SQLException
true
if so; false
otherwiseSQLException
- if a database access error occursboolean dataDefinitionIgnoredInTransactions() throws SQLException
true
if so; false
otherwiseSQLException
- if a database access error occursResultSet getProcedures(String catalog, String schemaPattern, String procedureNamePattern) throws SQLException
Only procedure descriptions matching the schema and
procedure name criteria are returned. They are ordered by
PROCEDURE_CAT
, PROCEDURE_SCHEM
,
PROCEDURE_NAME
and SPECIFIC_ NAME
.
Each procedure description has the the following columns:
=>
procedure catalog (may be null
)
=>
procedure schema (may be null
)
=>
procedure name
=>
explanatory comment on the procedure
=>
kind of procedure:
=>
The name which uniquely identifies this
procedure within its schema.
A user may not have permissions to execute any of the procedures that are
returned by getProcedures
catalog
- a catalog name; must match the catalog name as it
is stored in the database; "" retrieves those without a catalog;
null
means that the catalog name should not be used to narrow
the searchschemaPattern
- a schema name pattern; must match the schema name
as it is stored in the database; "" retrieves those without a schema;
null
means that the schema name should not be used to narrow
the searchprocedureNamePattern
- a procedure name pattern; must match the
procedure name as it is stored in the databaseResultSet
- each row is a procedure descriptionSQLException
- if a database access error occursgetSearchStringEscape()
ResultSet getProcedureColumns(String catalog, String schemaPattern, String procedureNamePattern, String columnNamePattern) throws SQLException
Only descriptions matching the schema, procedure and parameter name criteria are returned. They are ordered by PROCEDURE_CAT, PROCEDURE_SCHEM, PROCEDURE_NAME and SPECIFIC_NAME. Within this, the return value, if any, is first. Next are the parameter descriptions in call order. The column descriptions follow in column number order.
Each row in the ResultSet
is a parameter description or
column description with the following fields:
=>
procedure catalog (may be null
)
=>
procedure schema (may be null
)
=>
procedure name
=>
column/parameter name
=>
kind of column/parameter:
ResultSet
=>
SQL type from java.sql.Types
=>
SQL type name, for a UDT type the
type name is fully qualified
=>
precision
=>
length in bytes of data
=>
scale - null is returned for data types where
SCALE is not applicable.
=>
radix
=>
can it contain NULL.
=>
comment describing parameter/column
=>
default value for the column, which should be interpreted as a string when the value is enclosed in single quotes (may be null
)
=>
reserved for future use
=>
reserved for future use
=>
the maximum length of binary and character based columns. For any other datatype the returned value is a
NULL
=>
the ordinal position, starting from 1, for the input and output parameters for a procedure. A value of 0
is returned if this row describes the procedure's return value. For result set columns, it is the
ordinal position of the column in the result set starting from 1. If there are
multiple result sets, the column ordinal positions are implementation
defined.
=>
ISO rules are used to determine the nullability for a column.
=>
the name which uniquely identifies this procedure within its schema.
Note: Some databases may not return the column descriptions for a procedure.
The PRECISION column represents the specified column size for the given column. For numeric data, this is the maximum precision. For character data, this is the length in characters. For datetime datatypes, this is the length in characters of the String representation (assuming the maximum allowed precision of the fractional seconds component). For binary data, this is the length in bytes. For the ROWID datatype, this is the length in bytes. Null is returned for data types where the column size is not applicable.
catalog
- a catalog name; must match the catalog name as it
is stored in the database; "" retrieves those without a catalog;
null
means that the catalog name should not be used to narrow
the searchschemaPattern
- a schema name pattern; must match the schema name
as it is stored in the database; "" retrieves those without a schema;
null
means that the schema name should not be used to narrow
the searchprocedureNamePattern
- a procedure name pattern; must match the
procedure name as it is stored in the databasecolumnNamePattern
- a column name pattern; must match the column name
as it is stored in the databaseResultSet
- each row describes a stored procedure parameter or
columnSQLException
- if a database access error occursgetSearchStringEscape()
ResultSet getTables(String catalog, String schemaPattern, String tableNamePattern, String[] types) throws SQLException
TABLE_TYPE
, TABLE_CAT
,
TABLE_SCHEM
and TABLE_NAME
.
Each table description has the following columns:
=>
table catalog (may be null
)
=>
table schema (may be null
)
=>
table name
=>
table type. Typical types are "TABLE",
"VIEW", "SYSTEM TABLE", "GLOBAL TEMPORARY",
"LOCAL TEMPORARY", "ALIAS", "SYNONYM".
=>
explanatory comment on the table
=>
the types catalog (may be null
)
=>
the types schema (may be null
)
=>
type name (may be null
)
=>
name of the designated
"identifier" column of a typed table (may be null
)
=>
specifies how values in
SELF_REFERENCING_COL_NAME are created. Values are
"SYSTEM", "USER", "DERIVED". (may be null
)
Note: Some databases may not return information for all tables.
catalog
- a catalog name; must match the catalog name as it
is stored in the database; "" retrieves those without a catalog;
null
means that the catalog name should not be used to narrow
the searchschemaPattern
- a schema name pattern; must match the schema name
as it is stored in the database; "" retrieves those without a schema;
null
means that the schema name should not be used to narrow
the searchtableNamePattern
- a table name pattern; must match the
table name as it is stored in the databasetypes
- a list of table types, which must be from the list of table types
returned from getTableTypes()
,to include; null
returns
all typesResultSet
- each row is a table descriptionSQLException
- if a database access error occursgetSearchStringEscape()
ResultSet getSchemas() throws SQLException
TABLE_CATALOG
and
TABLE_SCHEM
.
The schema columns are:
=>
schema name
=>
catalog name (may be null
)
ResultSet
object in which each row is a
schema descriptionSQLException
- if a database access error occursResultSet getCatalogs() throws SQLException
The catalog column is:
=>
catalog name
ResultSet
object in which each row has a
single String
column that is a catalog nameSQLException
- if a database access error occursResultSet getTableTypes() throws SQLException
The table type is:
=>
table type. Typical types are "TABLE",
"VIEW", "SYSTEM TABLE", "GLOBAL TEMPORARY",
"LOCAL TEMPORARY", "ALIAS", "SYNONYM".
ResultSet
object in which each row has a
single String
column that is a table typeSQLException
- if a database access error occursResultSet getColumns(String catalog, String schemaPattern, String tableNamePattern, String columnNamePattern) throws SQLException
Only column descriptions matching the catalog, schema, table
and column name criteria are returned. They are ordered by
TABLE_CAT
,TABLE_SCHEM
,
TABLE_NAME
, and ORDINAL_POSITION
.
Each column description has the following columns:
=>
table catalog (may be null
)
=>
table schema (may be null
)
=>
table name
=>
column name
=>
SQL type from java.sql.Types
=>
Data source dependent type name,
for a UDT the type name is fully qualified
=>
column size.
=>
the number of fractional digits. Null is returned for data types where
DECIMAL_DIGITS is not applicable.
=>
Radix (typically either 10 or 2)
=>
is NULL allowed.
NULL
values
NULL
values
=>
comment describing column (may be null
)
=>
default value for the column, which should be interpreted as a string when the value is enclosed in single quotes (may be null
)
=>
unused
=>
unused
=>
for char types the
maximum number of bytes in the column
=>
index of column in table
(starting at 1)
=>
ISO rules are used to determine the nullability for a column.
=>
catalog of table that is the scope
of a reference attribute (null
if DATA_TYPE isn't REF)
=>
schema of table that is the scope
of a reference attribute (null
if the DATA_TYPE isn't REF)
=>
table name that this the scope
of a reference attribute (null
if the DATA_TYPE isn't REF)
=>
source type of a distinct type or user-generated
Ref type, SQL type from java.sql.Types (null
if DATA_TYPE
isn't DISTINCT or user-generated REF)
=>
Indicates whether this column is auto incremented
=>
Indicates whether this is a generated column
The COLUMN_SIZE column specifies the column size for the given column. For numeric data, this is the maximum precision. For character data, this is the length in characters. For datetime datatypes, this is the length in characters of the String representation (assuming the maximum allowed precision of the fractional seconds component). For binary data, this is the length in bytes. For the ROWID datatype, this is the length in bytes. Null is returned for data types where the column size is not applicable.
catalog
- a catalog name; must match the catalog name as it
is stored in the database; "" retrieves those without a catalog;
null
means that the catalog name should not be used to narrow
the searchschemaPattern
- a schema name pattern; must match the schema name
as it is stored in the database; "" retrieves those without a schema;
null
means that the schema name should not be used to narrow
the searchtableNamePattern
- a table name pattern; must match the
table name as it is stored in the databasecolumnNamePattern
- a column name pattern; must match the column
name as it is stored in the databaseResultSet
- each row is a column descriptionSQLException
- if a database access error occursgetSearchStringEscape()
ResultSet getColumnPrivileges(String catalog, String schema, String table, String columnNamePattern) throws SQLException
Only privileges matching the column name criteria are returned. They are ordered by COLUMN_NAME and PRIVILEGE.
Each privilege description has the following columns:
=>
table catalog (may be null
)
=>
table schema (may be null
)
=>
table name
=>
column name
=>
grantor of access (may be null
)
=>
grantee of access
=>
name of access (SELECT,
INSERT, UPDATE, REFRENCES, ...)
=>
"YES" if grantee is permitted
to grant to others; "NO" if not; null
if unknown
catalog
- a catalog name; must match the catalog name as it
is stored in the database; "" retrieves those without a catalog;
null
means that the catalog name should not be used to narrow
the searchschema
- a schema name; must match the schema name as it is
stored in the database; "" retrieves those without a schema;
null
means that the schema name should not be used to narrow
the searchtable
- a table name; must match the table name as it is
stored in the databasecolumnNamePattern
- a column name pattern; must match the column
name as it is stored in the databaseResultSet
- each row is a column privilege descriptionSQLException
- if a database access error occursgetSearchStringEscape()
ResultSet getTablePrivileges(String catalog, String schemaPattern, String tableNamePattern) throws SQLException
Only privileges matching the schema and table name
criteria are returned. They are ordered by
TABLE_CAT
,
TABLE_SCHEM
, TABLE_NAME
,
and PRIVILEGE
.
Each privilege description has the following columns:
=>
table catalog (may be null
)
=>
table schema (may be null
)
=>
table name
=>
grantor of access (may be null
)
=>
grantee of access
=>
name of access (SELECT,
INSERT, UPDATE, REFRENCES, ...)
=>
"YES" if grantee is permitted
to grant to others; "NO" if not; null
if unknown
catalog
- a catalog name; must match the catalog name as it
is stored in the database; "" retrieves those without a catalog;
null
means that the catalog name should not be used to narrow
the searchschemaPattern
- a schema name pattern; must match the schema name
as it is stored in the database; "" retrieves those without a schema;
null
means that the schema name should not be used to narrow
the searchtableNamePattern
- a table name pattern; must match the
table name as it is stored in the databaseResultSet
- each row is a table privilege descriptionSQLException
- if a database access error occursgetSearchStringEscape()
ResultSet getBestRowIdentifier(String catalog, String schema, String table, int scope, boolean nullable) throws SQLException
Each column description has the following columns:
=>
actual scope of result
=>
column name
=>
SQL data type from java.sql.Types
=>
Data source dependent type name,
for a UDT the type name is fully qualified
=>
precision
=>
not used
=>
scale - Null is returned for data types where
DECIMAL_DIGITS is not applicable.
=>
is this a pseudo column
like an Oracle ROWID
The COLUMN_SIZE column represents the specified column size for the given column. For numeric data, this is the maximum precision. For character data, this is the length in characters. For datetime datatypes, this is the length in characters of the String representation (assuming the maximum allowed precision of the fractional seconds component). For binary data, this is the length in bytes. For the ROWID datatype, this is the length in bytes. Null is returned for data types where the column size is not applicable.
catalog
- a catalog name; must match the catalog name as it
is stored in the database; "" retrieves those without a catalog;
null
means that the catalog name should not be used to narrow
the searchschema
- a schema name; must match the schema name
as it is stored in the database; "" retrieves those without a schema;
null
means that the schema name should not be used to narrow
the searchtable
- a table name; must match the table name as it is stored
in the databasescope
- the scope of interest; use same values as SCOPEnullable
- include columns that are nullable.ResultSet
- each row is a column descriptionSQLException
- if a database access error occursResultSet getVersionColumns(String catalog, String schema, String table) throws SQLException
Each column description has the following columns:
=>
is not used
=>
column name
=>
SQL data type from java.sql.Types
=>
Data source-dependent type name
=>
precision
=>
length of column value in bytes
=>
scale - Null is returned for data types where
DECIMAL_DIGITS is not applicable.
=>
whether this is pseudo column
like an Oracle ROWID
The COLUMN_SIZE column represents the specified column size for the given column. For numeric data, this is the maximum precision. For character data, this is the length in characters. For datetime datatypes, this is the length in characters of the String representation (assuming the maximum allowed precision of the fractional seconds component). For binary data, this is the length in bytes. For the ROWID datatype, this is the length in bytes. Null is returned for data types where the column size is not applicable.
catalog
- a catalog name; must match the catalog name as it
is stored in the database; "" retrieves those without a catalog;
null
means that the catalog name should not be used to narrow
the searchschema
- a schema name; must match the schema name
as it is stored in the database; "" retrieves those without a schema;
null
means that the schema name should not be used to narrow
the searchtable
- a table name; must match the table name as it is stored
in the databaseResultSet
object in which each row is a
column descriptionSQLException
- if a database access error occursResultSet getPrimaryKeys(String catalog, String schema, String table) throws SQLException
Each primary key column description has the following columns:
=>
table catalog (may be null
)
=>
table schema (may be null
)
=>
table name
=>
column name
=>
sequence number within primary key( a value
of 1 represents the first column of the primary key, a value of 2 would
represent the second column within the primary key).
=>
primary key name (may be null
)
catalog
- a catalog name; must match the catalog name as it
is stored in the database; "" retrieves those without a catalog;
null
means that the catalog name should not be used to narrow
the searchschema
- a schema name; must match the schema name
as it is stored in the database; "" retrieves those without a schema;
null
means that the schema name should not be used to narrow
the searchtable
- a table name; must match the table name as it is stored
in the databaseResultSet
- each row is a primary key column descriptionSQLException
- if a database access error occursResultSet getImportedKeys(String catalog, String schema, String table) throws SQLException
Each primary key column description has the following columns:
=>
primary key table catalog
being imported (may be null
)
=>
primary key table schema
being imported (may be null
)
=>
primary key table name
being imported
=>
primary key column name
being imported
=>
foreign key table catalog (may be null
)
=>
foreign key table schema (may be null
)
=>
foreign key table name
=>
foreign key column name
=>
sequence number within a foreign key( a value
of 1 represents the first column of the foreign key, a value of 2 would
represent the second column within the foreign key).
=>
What happens to a
foreign key when the primary key is updated:
NULL
if its primary key has been updated
=>
What happens to
the foreign key when primary is deleted.
=>
foreign key name (may be null
)
=>
primary key name (may be null
)
=>
can the evaluation of foreign key
constraints be deferred until commit
catalog
- a catalog name; must match the catalog name as it
is stored in the database; "" retrieves those without a catalog;
null
means that the catalog name should not be used to narrow
the searchschema
- a schema name; must match the schema name
as it is stored in the database; "" retrieves those without a schema;
null
means that the schema name should not be used to narrow
the searchtable
- a table name; must match the table name as it is stored
in the databaseResultSet
- each row is a primary key column descriptionSQLException
- if a database access error occursgetExportedKeys(java.lang.String, java.lang.String, java.lang.String)
ResultSet getExportedKeys(String catalog, String schema, String table) throws SQLException
Each foreign key column description has the following columns:
=>
primary key table catalog (may be null
)
=>
primary key table schema (may be null
)
=>
primary key table name
=>
primary key column name
=>
foreign key table catalog (may be null
)
being exported (may be null
)
=>
foreign key table schema (may be null
)
being exported (may be null
)
=>
foreign key table name
being exported
=>
foreign key column name
being exported
=>
sequence number within foreign key( a value
of 1 represents the first column of the foreign key, a value of 2 would
represent the second column within the foreign key).
=>
What happens to
foreign key when primary is updated:
NULL
if
its primary key has been updated
=>
What happens to
the foreign key when primary is deleted.
NULL
if
its primary key has been deleted
=>
foreign key name (may be null
)
=>
primary key name (may be null
)
=>
can the evaluation of foreign key
constraints be deferred until commit
catalog
- a catalog name; must match the catalog name as it
is stored in this database; "" retrieves those without a catalog;
null
means that the catalog name should not be used to narrow
the searchschema
- a schema name; must match the schema name
as it is stored in the database; "" retrieves those without a schema;
null
means that the schema name should not be used to narrow
the searchtable
- a table name; must match the table name as it is stored
in this databaseResultSet
object in which each row is a
foreign key column descriptionSQLException
- if a database access error occursgetImportedKeys(java.lang.String, java.lang.String, java.lang.String)
ResultSet getCrossReference(String parentCatalog, String parentSchema, String parentTable, String foreignCatalog, String foreignSchema, String foreignTable) throws SQLException
Each foreign key column description has the following columns:
=>
parent key table catalog (may be null
)
=>
parent key table schema (may be null
)
=>
parent key table name
=>
parent key column name
=>
foreign key table catalog (may be null
)
being exported (may be null
)
=>
foreign key table schema (may be null
)
being exported (may be null
)
=>
foreign key table name
being exported
=>
foreign key column name
being exported
=>
sequence number within foreign key( a value
of 1 represents the first column of the foreign key, a value of 2 would
represent the second column within the foreign key).
=>
What happens to
foreign key when parent key is updated:
NULL
if
its parent key has been updated
=>
What happens to
the foreign key when parent key is deleted.
NULL
if
its primary key has been deleted
=>
foreign key name (may be null
)
=>
parent key name (may be null
)
=>
can the evaluation of foreign key
constraints be deferred until commit
parentCatalog
- a catalog name; must match the catalog name
as it is stored in the database; "" retrieves those without a
catalog; null
means drop catalog name from the selection criteriaparentSchema
- a schema name; must match the schema name as
it is stored in the database; "" retrieves those without a schema;
null
means drop schema name from the selection criteriaparentTable
- the name of the table that exports the key; must match
the table name as it is stored in the databaseforeignCatalog
- a catalog name; must match the catalog name as
it is stored in the database; "" retrieves those without a
catalog; null
means drop catalog name from the selection criteriaforeignSchema
- a schema name; must match the schema name as it
is stored in the database; "" retrieves those without a schema;
null
means drop schema name from the selection criteriaforeignTable
- the name of the table that imports the key; must match
the table name as it is stored in the databaseResultSet
- each row is a foreign key column descriptionSQLException
- if a database access error occursgetImportedKeys(java.lang.String, java.lang.String, java.lang.String)
ResultSet getTypeInfo() throws SQLException
If the database supports SQL distinct types, then getTypeInfo() will return a single row with a TYPE_NAME of DISTINCT and a DATA_TYPE of Types.DISTINCT. If the database supports SQL structured types, then getTypeInfo() will return a single row with a TYPE_NAME of STRUCT and a DATA_TYPE of Types.STRUCT.
If SQL distinct or structured types are supported, then information on the individual types may be obtained from the getUDTs() method.
Each type description has the following columns:
=>
Type name
=>
SQL data type from java.sql.Types
=>
maximum precision
=>
prefix used to quote a literal
(may be null
)
=>
suffix used to quote a literal
(may be null
)
=>
parameters used in creating
the type (may be null
)
=>
can you use NULL for this type.
=>
is it case sensitive.
=>
can you use "WHERE" based on this type:
=>
is it unsigned.
=>
can it be a money value.
=>
can it be used for an
auto-increment value.
=>
localized version of type name
(may be null
)
=>
minimum scale supported
=>
maximum scale supported
=>
unused
=>
unused
=>
usually 2 or 10
The PRECISION column represents the maximum column size that the server supports for the given datatype. For numeric data, this is the maximum precision. For character data, this is the length in characters. For datetime datatypes, this is the length in characters of the String representation (assuming the maximum allowed precision of the fractional seconds component). For binary data, this is the length in bytes. For the ROWID datatype, this is the length in bytes. Null is returned for data types where the column size is not applicable.
ResultSet
object in which each row is an SQL
type descriptionSQLException
- if a database access error occursResultSet getIndexInfo(String catalog, String schema, String table, boolean unique, boolean approximate) throws SQLException
Each index column description has the following columns:
=>
table catalog (may be null
)
=>
table schema (may be null
)
=>
table name
=>
Can index values be non-unique.
false when TYPE is tableIndexStatistic
=>
index catalog (may be null
);
null
when TYPE is tableIndexStatistic
=>
index name; null
when TYPE is
tableIndexStatistic
=>
index type:
=>
column sequence number
within index; zero when TYPE is tableIndexStatistic
=>
column name; null
when TYPE is
tableIndexStatistic
=>
column sort sequence, "A" =>
ascending,
"D" =>
descending, may be null
if sort sequence is not supported;
null
when TYPE is tableIndexStatistic
=>
When TYPE is tableIndexStatistic, then
this is the number of rows in the table; otherwise, it is the
number of unique values in the index.
=>
When TYPE is tableIndexStatisic then
this is the number of pages used for the table, otherwise it
is the number of pages used for the current index.
=>
Filter condition, if any.
(may be null
)
catalog
- a catalog name; must match the catalog name as it
is stored in this database; "" retrieves those without a catalog;
null
means that the catalog name should not be used to narrow
the searchschema
- a schema name; must match the schema name
as it is stored in this database; "" retrieves those without a schema;
null
means that the schema name should not be used to narrow
the searchtable
- a table name; must match the table name as it is stored
in this databaseunique
- when true, return only indices for unique values;
when false, return indices regardless of whether unique or notapproximate
- when true, result is allowed to reflect approximate
or out of data values; when false, results are requested to be
accurateResultSet
- each row is an index column descriptionSQLException
- if a database access error occursboolean supportsResultSetType(int type) throws SQLException
type
- defined in java.sql.ResultSet
true
if so; false
otherwiseSQLException
- if a database access error occursConnection
boolean supportsResultSetConcurrency(int type, int concurrency) throws SQLException
type
- defined in java.sql.ResultSet
concurrency
- type defined in java.sql.ResultSet
true
if so; false
otherwiseSQLException
- if a database access error occursConnection
boolean ownUpdatesAreVisible(int type) throws SQLException
ResultSet
object,
the result set's own updates are visible.type
- the ResultSet
type; one of
ResultSet.TYPE_FORWARD_ONLY
,
ResultSet.TYPE_SCROLL_INSENSITIVE
, or
ResultSet.TYPE_SCROLL_SENSITIVE
true
if updates are visible for the given result set type;
false
otherwiseSQLException
- if a database access error occursboolean ownDeletesAreVisible(int type) throws SQLException
type
- the ResultSet
type; one of
ResultSet.TYPE_FORWARD_ONLY
,
ResultSet.TYPE_SCROLL_INSENSITIVE
, or
ResultSet.TYPE_SCROLL_SENSITIVE
true
if deletes are visible for the given result set type;
false
otherwiseSQLException
- if a database access error occursboolean ownInsertsAreVisible(int type) throws SQLException
type
- the ResultSet
type; one of
ResultSet.TYPE_FORWARD_ONLY
,
ResultSet.TYPE_SCROLL_INSENSITIVE
, or
ResultSet.TYPE_SCROLL_SENSITIVE
true
if inserts are visible for the given result set type;
false
otherwiseSQLException
- if a database access error occursboolean othersUpdatesAreVisible(int type) throws SQLException
type
- the ResultSet
type; one of
ResultSet.TYPE_FORWARD_ONLY
,
ResultSet.TYPE_SCROLL_INSENSITIVE
, or
ResultSet.TYPE_SCROLL_SENSITIVE
true
if updates made by others
are visible for the given result set type;
false
otherwiseSQLException
- if a database access error occursboolean othersDeletesAreVisible(int type) throws SQLException
type
- the ResultSet
type; one of
ResultSet.TYPE_FORWARD_ONLY
,
ResultSet.TYPE_SCROLL_INSENSITIVE
, or
ResultSet.TYPE_SCROLL_SENSITIVE
true
if deletes made by others
are visible for the given result set type;
false
otherwiseSQLException
- if a database access error occursboolean othersInsertsAreVisible(int type) throws SQLException
type
- the ResultSet
type; one of
ResultSet.TYPE_FORWARD_ONLY
,
ResultSet.TYPE_SCROLL_INSENSITIVE
, or
ResultSet.TYPE_SCROLL_SENSITIVE
true
if inserts made by others
are visible for the given result set type;
false
otherwiseSQLException
- if a database access error occursboolean updatesAreDetected(int type) throws SQLException
ResultSet.rowUpdated
.type
- the ResultSet
type; one of
ResultSet.TYPE_FORWARD_ONLY
,
ResultSet.TYPE_SCROLL_INSENSITIVE
, or
ResultSet.TYPE_SCROLL_SENSITIVE
true
if changes are detected by the result set type;
false
otherwiseSQLException
- if a database access error occursboolean deletesAreDetected(int type) throws SQLException
ResultSet.rowDeleted
. If the method
deletesAreDetected
returns false
, it means that
deleted rows are removed from the result set.type
- the ResultSet
type; one of
ResultSet.TYPE_FORWARD_ONLY
,
ResultSet.TYPE_SCROLL_INSENSITIVE
, or
ResultSet.TYPE_SCROLL_SENSITIVE
true
if deletes are detected by the given result set type;
false
otherwiseSQLException
- if a database access error occursboolean insertsAreDetected(int type) throws SQLException
ResultSet.rowInserted
.type
- the ResultSet
type; one of
ResultSet.TYPE_FORWARD_ONLY
,
ResultSet.TYPE_SCROLL_INSENSITIVE
, or
ResultSet.TYPE_SCROLL_SENSITIVE
true
if changes are detected by the specified result
set type; false
otherwiseSQLException
- if a database access error occursboolean supportsBatchUpdates() throws SQLException
true
if this database supports batch updates;
false
otherwiseSQLException
- if a database access error occursResultSet getUDTs(String catalog, String schemaPattern, String typeNamePattern, int[] types) throws SQLException
JAVA_OBJECT
, STRUCT
,
or DISTINCT
.
Only types matching the catalog, schema, type name and type
criteria are returned. They are ordered by DATA_TYPE
,
TYPE_CAT
, TYPE_SCHEM
and
TYPE_NAME
. The type name parameter may be a fully-qualified
name. In this case, the catalog and schemaPattern parameters are
ignored.
Each type description has the following columns:
=>
the type's catalog (may be null
)
=>
type's schema (may be null
)
=>
type name
=>
Java class name
=>
type value defined in java.sql.Types.
One of JAVA_OBJECT, STRUCT, or DISTINCT
=>
explanatory comment on the type
=>
type code of the source type of a
DISTINCT type or the type that implements the user-generated
reference type of the SELF_REFERENCING_COLUMN of a structured
type as defined in java.sql.Types (null
if DATA_TYPE is not
DISTINCT or not STRUCT with REFERENCE_GENERATION = USER_DEFINED)
Note: If the driver does not support UDTs, an empty result set is returned.
catalog
- a catalog name; must match the catalog name as it
is stored in the database; "" retrieves those without a catalog;
null
means that the catalog name should not be used to narrow
the searchschemaPattern
- a schema pattern name; must match the schema name
as it is stored in the database; "" retrieves those without a schema;
null
means that the schema name should not be used to narrow
the searchtypeNamePattern
- a type name pattern; must match the type name
as it is stored in the database; may be a fully qualified nametypes
- a list of user-defined types (JAVA_OBJECT,
STRUCT, or DISTINCT) to include; null
returns all typesResultSet
object in which each row describes a UDTSQLException
- if a database access error occursgetSearchStringEscape()
Connection getConnection() throws SQLException
SQLException
- if a database access error occursboolean supportsSavepoints() throws SQLException
true
if savepoints are supported;
false
otherwiseSQLException
- if a database access error occursboolean supportsNamedParameters() throws SQLException
true
if named parameters are supported;
false
otherwiseSQLException
- if a database access error occursboolean supportsMultipleOpenResults() throws SQLException
ResultSet
objects
returned from a CallableStatement
object
simultaneously.true
if a CallableStatement
object
can return multiple ResultSet
objects
simultaneously; false
otherwiseSQLException
- if a datanase access error occursboolean supportsGetGeneratedKeys() throws SQLException
true
if auto-generated keys can be retrieved
after a statement has executed; false
otherwise
If true
is returned, the JDBC driver must support the
returning of auto-generated keys for at least SQL INSERT statements
SQLException
- if a database access error occursResultSet getSuperTypes(String catalog, String schemaPattern, String typeNamePattern) throws SQLException
Only supertype information for UDTs matching the catalog, schema, and type name is returned. The type name parameter may be a fully-qualified name. When the UDT name supplied is a fully-qualified name, the catalog and schemaPattern parameters are ignored.
If a UDT does not have a direct super type, it is not listed here.
A row of the ResultSet
object returned by this method
describes the designated UDT and a direct supertype. A row has the following
columns:
=>
the UDT's catalog (may be null
)
=>
UDT's schema (may be null
)
=>
type name of the UDT
=>
the direct super type's catalog
(may be null
)
=>
the direct super type's schema
(may be null
)
=>
the direct super type's name
Note: If the driver does not support type hierarchies, an empty result set is returned.
catalog
- a catalog name; "" retrieves those without a catalog;
null
means drop catalog name from the selection criteriaschemaPattern
- a schema name pattern; "" retrieves those
without a schematypeNamePattern
- a UDT name pattern; may be a fully-qualified
nameResultSet
object in which a row gives information
about the designated UDTSQLException
- if a database access error occursgetSearchStringEscape()
ResultSet getSuperTables(String catalog, String schemaPattern, String tableNamePattern) throws SQLException
Only supertable information for tables matching the catalog, schema and table name are returned. The table name parameter may be a fully- qualified name, in which case, the catalog and schemaPattern parameters are ignored. If a table does not have a super table, it is not listed here. Supertables have to be defined in the same catalog and schema as the sub tables. Therefore, the type description does not need to include this information for the supertable.
Each type description has the following columns:
=>
the type's catalog (may be null
)
=>
type's schema (may be null
)
=>
type name
=>
the direct super type's name
Note: If the driver does not support type hierarchies, an empty result set is returned.
catalog
- a catalog name; "" retrieves those without a catalog;
null
means drop catalog name from the selection criteriaschemaPattern
- a schema name pattern; "" retrieves those
without a schematableNamePattern
- a table name pattern; may be a fully-qualified
nameResultSet
object in which each row is a type descriptionSQLException
- if a database access error occursgetSearchStringEscape()
ResultSet getAttributes(String catalog, String schemaPattern, String typeNamePattern, String attributeNamePattern) throws SQLException
Descriptions are returned only for attributes of UDTs matching the
catalog, schema, type, and attribute name criteria. They are ordered by
TYPE_CAT
, TYPE_SCHEM
,
TYPE_NAME
and ORDINAL_POSITION
. This description
does not contain inherited attributes.
The ResultSet
object that is returned has the following
columns:
=>
type catalog (may be null
)
=>
type schema (may be null
)
=>
type name
=>
attribute name
=>
attribute type SQL type from java.sql.Types
=>
Data source dependent type name.
For a UDT, the type name is fully qualified. For a REF, the type name is
fully qualified and represents the target type of the reference type.
=>
column size. For char or date
types this is the maximum number of characters; for numeric or
decimal types this is precision.
=>
the number of fractional digits. Null is returned for data types where
DECIMAL_DIGITS is not applicable.
=>
Radix (typically either 10 or 2)
=>
whether NULL is allowed
=>
comment describing column (may be null
)
=>
default value (may be null
)
=>
unused
=>
unused
=>
for char types the
maximum number of bytes in the column
=>
index of the attribute in the UDT
(starting at 1)
=>
ISO rules are used to determine
the nullability for a attribute.
=>
catalog of table that is the
scope of a reference attribute (null
if DATA_TYPE isn't REF)
=>
schema of table that is the
scope of a reference attribute (null
if DATA_TYPE isn't REF)
=>
table name that is the scope of a
reference attribute (null
if the DATA_TYPE isn't REF)
=>
source type of a distinct type or user-generated
Ref type,SQL type from java.sql.Types (null
if DATA_TYPE
isn't DISTINCT or user-generated REF)
catalog
- a catalog name; must match the catalog name as it
is stored in the database; "" retrieves those without a catalog;
null
means that the catalog name should not be used to narrow
the searchschemaPattern
- a schema name pattern; must match the schema name
as it is stored in the database; "" retrieves those without a schema;
null
means that the schema name should not be used to narrow
the searchtypeNamePattern
- a type name pattern; must match the
type name as it is stored in the databaseattributeNamePattern
- an attribute name pattern; must match the attribute
name as it is declared in the databaseResultSet
object in which each row is an
attribute descriptionSQLException
- if a database access error occursgetSearchStringEscape()
boolean supportsResultSetHoldability(int holdability) throws SQLException
holdability
- one of the following constants:
ResultSet.HOLD_CURSORS_OVER_COMMIT
or
ResultSet.CLOSE_CURSORS_AT_COMMIT
true
if so; false
otherwiseSQLException
- if a database access error occursConnection
int getResultSetHoldability() throws SQLException
ResultSet
objects.ResultSet.HOLD_CURSORS_OVER_COMMIT
or
ResultSet.CLOSE_CURSORS_AT_COMMIT
SQLException
- if a database access error occursint getDatabaseMajorVersion() throws SQLException
SQLException
- if a database access error occursint getDatabaseMinorVersion() throws SQLException
SQLException
- if a database access error occursint getJDBCMajorVersion() throws SQLException
SQLException
- if a database access error occursint getJDBCMinorVersion() throws SQLException
SQLException
- if a database access error occursint getSQLStateType() throws SQLException
SQLException.getSQLState
is X/Open (now known as Open Group) SQL CLI or SQL:2003.SQLException
- if a database access error occursboolean locatorsUpdateCopy() throws SQLException
true
if updates are made to a copy of the LOB;
false
if updates are made directly to the LOBSQLException
- if a database access error occursboolean supportsStatementPooling() throws SQLException
true
if so; false
otherwiseSQLException
- if a database access error occursRowIdLifetime getRowIdLifetime() throws SQLException
ROWID
type,
and if so the lifetime for which a RowId
object remains valid.
The returned int values have the following relationship:
ROWID_UNSUPPORTED < ROWID_VALID_OTHER < ROWID_VALID_TRANSACTION
< ROWID_VALID_SESSION < ROWID_VALID_FOREVER
so conditional logic such as
if (metadata.getRowIdLifetime() > DatabaseMetaData.ROWID_VALID_TRANSACTION)
can be used. Valid Forever means valid across all Sessions, and valid for
a Session means valid across all its contained Transactions.RowId
SQLException
- if a database access error occursResultSet getSchemas(String catalog, String schemaPattern) throws SQLException
TABLE_CATALOG
and
TABLE_SCHEM
.
The schema columns are:
=>
schema name
=>
catalog name (may be null
)
catalog
- a catalog name; must match the catalog name as it is stored
in the database;"" retrieves those without a catalog; null means catalog
name should not be used to narrow down the search.schemaPattern
- a schema name; must match the schema name as it is
stored in the database; null means
schema name should not be used to narrow down the search.ResultSet
object in which each row is a
schema descriptionSQLException
- if a database access error occursgetSearchStringEscape()
boolean supportsStoredFunctionsUsingCallSyntax() throws SQLException
true
if so; false
otherwiseSQLException
- if a database access error occursboolean autoCommitFailureClosesAllResultSets() throws SQLException
SQLException
while autoCommit is true
indicates
that all open ResultSets are closed, even ones that are holdable. When a SQLException
occurs while
autocommit is true
, it is vendor specific whether the JDBC driver responds with a commit operation, a
rollback operation, or by doing neither a commit nor a rollback. A potential result of this difference
is in whether or not holdable ResultSets are closed.true
if so; false
otherwiseSQLException
- if a database access error occursResultSet getClientInfoProperties() throws SQLException
=>
The name of the client info property=>
The maximum length of the value for the property=>
The default value of the property=>
A description of the property. This will typically
contain information as to where this property is
stored in the database.
The ResultSet
is sorted by the NAME column
ResultSet
object; each row is a supported client info
property
SQLException
- if a database access error occurs
ResultSet getFunctions(String catalog, String schemaPattern, String functionNamePattern) throws SQLException
Only system and user function descriptions matching the schema and
function name criteria are returned. They are ordered by
FUNCTION_CAT
, FUNCTION_SCHEM
,
FUNCTION_NAME
and
SPECIFIC_ NAME
.
Each function description has the the following columns:
=>
function catalog (may be null
)
=>
function schema (may be null
)
=>
function name. This is the name
used to invoke the function
=>
explanatory comment on the function
=>
kind of function:
=>
the name which uniquely identifies
this function within its schema. This is a user specified, or DBMS
generated, name that may be different then the FUNCTION_NAME
for example with overload functions
A user may not have permission to execute any of the functions that are
returned by getFunctions
catalog
- a catalog name; must match the catalog name as it
is stored in the database; "" retrieves those without a catalog;
null
means that the catalog name should not be used to narrow
the searchschemaPattern
- a schema name pattern; must match the schema name
as it is stored in the database; "" retrieves those without a schema;
null
means that the schema name should not be used to narrow
the searchfunctionNamePattern
- a function name pattern; must match the
function name as it is stored in the databaseResultSet
- each row is a function descriptionSQLException
- if a database access error occursgetSearchStringEscape()
ResultSet getFunctionColumns(String catalog, String schemaPattern, String functionNamePattern, String columnNamePattern) throws SQLException
Only descriptions matching the schema, function and
parameter name criteria are returned. They are ordered by
FUNCTION_CAT
, FUNCTION_SCHEM
,
FUNCTION_NAME
and
SPECIFIC_ NAME
. Within this, the return value,
if any, is first. Next are the parameter descriptions in call
order. The column descriptions follow in column number order.
Each row in the ResultSet
is a parameter description, column description or
return type description with the following fields:
=>
function catalog (may be null
)
=>
function schema (may be null
)
=>
function name. This is the name
used to invoke the function
=>
column/parameter name
=>
kind of column/parameter:
ResultSet
=>
SQL type from java.sql.Types
=>
SQL type name, for a UDT type the
type name is fully qualified
=>
precision
=>
length in bytes of data
=>
scale - null is returned for data types where
SCALE is not applicable.
=>
radix
=>
can it contain NULL.
=>
comment describing column/parameter
=>
the maximum length of binary
and character based parameters or columns. For any other datatype the returned value
is a NULL
=>
the ordinal position, starting
from 1, for the input and output parameters. A value of 0
is returned if this row describes the function's return value.
For result set columns, it is the
ordinal position of the column in the result set starting from 1.
=>
ISO rules are used to determine
the nullability for a parameter or column.
=>
the name which uniquely identifies
this function within its schema. This is a user specified, or DBMS
generated, name that may be different then the FUNCTION_NAME
for example with overload functions
The PRECISION column represents the specified column size for the given parameter or column. For numeric data, this is the maximum precision. For character data, this is the length in characters. For datetime datatypes, this is the length in characters of the String representation (assuming the maximum allowed precision of the fractional seconds component). For binary data, this is the length in bytes. For the ROWID datatype, this is the length in bytes. Null is returned for data types where the column size is not applicable.
catalog
- a catalog name; must match the catalog name as it
is stored in the database; "" retrieves those without a catalog;
null
means that the catalog name should not be used to narrow
the searchschemaPattern
- a schema name pattern; must match the schema name
as it is stored in the database; "" retrieves those without a schema;
null
means that the schema name should not be used to narrow
the searchfunctionNamePattern
- a procedure name pattern; must match the
function name as it is stored in the databasecolumnNamePattern
- a parameter name pattern; must match the
parameter or column name as it is stored in the databaseResultSet
- each row describes a
user function parameter, column or return typeSQLException
- if a database access error occursgetSearchStringEscape()
ResultSet getPseudoColumns(String catalog, String schemaPattern, String tableNamePattern, String columnNamePattern) throws SQLException
Only column descriptions matching the catalog, schema, table
and column name criteria are returned. They are ordered by
TABLE_CAT
,TABLE_SCHEM
, TABLE_NAME
and COLUMN_NAME
.
Each column description has the following columns:
=>
table catalog (may be null
)
=>
table schema (may be null
)
=>
table name
=>
column name
=>
SQL type from java.sql.Types
=>
column size.
=>
the number of fractional digits. Null is returned for data types where
DECIMAL_DIGITS is not applicable.
=>
Radix (typically either 10 or 2)
=>
The allowed usage for the column. The
value returned will correspond to the enum name returned by PseudoColumnUsage.name()
=>
comment describing column (may be null
)
=>
for char types the
maximum number of bytes in the column
=>
ISO rules are used to determine the nullability for a column.
The COLUMN_SIZE column specifies the column size for the given column. For numeric data, this is the maximum precision. For character data, this is the length in characters. For datetime datatypes, this is the length in characters of the String representation (assuming the maximum allowed precision of the fractional seconds component). For binary data, this is the length in bytes. For the ROWID datatype, this is the length in bytes. Null is returned for data types where the column size is not applicable.
catalog
- a catalog name; must match the catalog name as it
is stored in the database; "" retrieves those without a catalog;
null
means that the catalog name should not be used to narrow
the searchschemaPattern
- a schema name pattern; must match the schema name
as it is stored in the database; "" retrieves those without a schema;
null
means that the schema name should not be used to narrow
the searchtableNamePattern
- a table name pattern; must match the
table name as it is stored in the databasecolumnNamePattern
- a column name pattern; must match the column
name as it is stored in the databaseResultSet
- each row is a column descriptionSQLException
- if a database access error occursPseudoColumnUsage
boolean generatedKeyAlwaysReturned() throws SQLException
true
if so; false
otherwiseSQLException
- if a database access error occursdefault long getMaxLogicalLobSize() throws SQLException
LOB
.
The default implementation will return 0
SQLException
- if a database access error occursdefault boolean supportsRefCursors() throws SQLException
The default implementation will return false
true
if this database supports REF CURSOR;
false
otherwiseSQLException
- if a database access error occurs Submit a bug or feature
For further API reference and developer documentation, see Java SE Documentation. That documentation contains more detailed, developer-targeted descriptions, with conceptual overviews, definitions of terms, workarounds, and working code examples.
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