ParameterMetaData (Java Platform SE 8 )

All Superinterfaces:

Wrapper
```
public interface ParameterMetaData
extends Wrapper
```
An object that can be used to get information about the types and properties for each parameter marker in a PreparedStatement object. For some queries and driver implementations, the data that would be returned by a ParameterMetaData object may not be available until the PreparedStatement has been executed.
Some driver implementations may not be able to provide information about the types and properties for each parameter marker in a CallableStatement object.

Since:

1.4

Field Summary

Fields
Modifier and Type	Field and Description
`static int`	`parameterModeIn` The constant indicating that the parameter's mode is IN.
`static int`	`parameterModeInOut` The constant indicating that the parameter's mode is INOUT.
`static int`	`parameterModeOut` The constant indicating that the parameter's mode is OUT.
`static int`	`parameterModeUnknown` The constant indicating that the mode of the parameter is unknown.
`static int`	`parameterNoNulls` The constant indicating that a parameter will not allow `NULL` values.
`static int`	`parameterNullable` The constant indicating that a parameter will allow `NULL` values.
`static int`	`parameterNullableUnknown` The constant indicating that the nullability of a parameter is unknown.

Method Summary

All Methods Instance Methods Abstract Methods
Modifier and Type	Method and Description
`String`	`getParameterClassName(int param)` Retrieves the fully-qualified name of the Java class whose instances should be passed to the method `PreparedStatement.setObject`.
`int`	`getParameterCount()` Retrieves the number of parameters in the `PreparedStatement` object for which this `ParameterMetaData` object contains information.
`int`	`getParameterMode(int param)` Retrieves the designated parameter's mode.
`int`	`getParameterType(int param)` Retrieves the designated parameter's SQL type.
`String`	`getParameterTypeName(int param)` Retrieves the designated parameter's database-specific type name.
`int`	`getPrecision(int param)` Retrieves the designated parameter's specified column size.
`int`	`getScale(int param)` Retrieves the designated parameter's number of digits to right of the decimal point.
`int`	`isNullable(int param)` Retrieves whether null values are allowed in the designated parameter.
`boolean`	`isSigned(int param)` Retrieves whether values for the designated parameter can be signed numbers.

Methods inherited from interface java.sql.Wrapper
isWrapperFor, unwrap

- Field Detail
  - parameterNoNulls
```
static final int parameterNoNulls
```
    The constant indicating that a parameter will not allow NULL values.
    
    See Also:
    
    Constant Field Values
  - parameterNullable
```
static final int parameterNullable
```
    The constant indicating that a parameter will allow NULL values.
    
    See Also:
    
    Constant Field Values
  - parameterNullableUnknown
```
static final int parameterNullableUnknown
```
    The constant indicating that the nullability of a parameter is unknown.
    
    See Also:
    
    Constant Field Values
  - parameterModeUnknown
```
static final int parameterModeUnknown
```
    The constant indicating that the mode of the parameter is unknown.
    
    See Also:
    
    Constant Field Values
  - parameterModeIn
```
static final int parameterModeIn
```
    The constant indicating that the parameter's mode is IN.
    
    See Also:
    
    Constant Field Values
  - parameterModeInOut
```
static final int parameterModeInOut
```
    The constant indicating that the parameter's mode is INOUT.
    
    See Also:
    
    Constant Field Values
  - parameterModeOut
```
static final int parameterModeOut
```
    The constant indicating that the parameter's mode is OUT.
    
    See Also:
    
    Constant Field Values
- Method Detail
  - getParameterCount
```
int getParameterCount()
               throws SQLException
```
    Retrieves the number of parameters in the PreparedStatement object for which this ParameterMetaData object contains information.
    
    Returns:
    
    the number of parameters
    
    Throws:
    
    SQLException - if a database access error occurs
    
    Since:
    
    1.4
  - isNullable
```
int isNullable(int param)
        throws SQLException
```
    Retrieves whether null values are allowed in the designated parameter.
    
    Parameters:
    
    param - the first parameter is 1, the second is 2, ...
    
    Returns:
    
    the nullability status of the given parameter; one of ParameterMetaData.parameterNoNulls, ParameterMetaData.parameterNullable, or ParameterMetaData.parameterNullableUnknown
    
    Throws:
    
    SQLException - if a database access error occurs
    
    Since:
    
    1.4
  - isSigned
```
boolean isSigned(int param)
          throws SQLException
```
    Retrieves whether values for the designated parameter can be signed numbers.
    
    Parameters:
    
    param - the first parameter is 1, the second is 2, ...
    
    Returns:
    
    true if so; false otherwise
    
    Throws:
    
    SQLException - if a database access error occurs
    
    Since:
    
    1.4
  - getPrecision
```
int getPrecision(int param)
          throws SQLException
```
    Retrieves the designated parameter's specified column size.
    The returned value represents the maximum column size for the given parameter. 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. 0 is returned for data types where the column size is not applicable.
    
    Parameters:
    
    param - the first parameter is 1, the second is 2, ...
    
    Returns:
    
    precision
    
    Throws:
    
    SQLException - if a database access error occurs
    
    Since:
    
    1.4
  - getScale
```
int getScale(int param)
      throws SQLException
```
    Retrieves the designated parameter's number of digits to right of the decimal point. 0 is returned for data types where the scale is not applicable.
    
    Parameters:
    
    param - the first parameter is 1, the second is 2, ...
    
    Returns:
    
    scale
    
    Throws:
    
    SQLException - if a database access error occurs
    
    Since:
    
    1.4
  - getParameterType
```
int getParameterType(int param)
              throws SQLException
```
    Retrieves the designated parameter's SQL type.
    
    Parameters:
    
    param - the first parameter is 1, the second is 2, ...
    
    Returns:
    
    SQL type from java.sql.Types
    
    Throws:
    
    SQLException - if a database access error occurs
    
    Since:
    
    1.4
    
    See Also:
    
    Types
  - getParameterTypeName
```
String getParameterTypeName(int param)
                     throws SQLException
```
    Retrieves the designated parameter's database-specific type name.
    
    Parameters:
    
    param - the first parameter is 1, the second is 2, ...
    
    Returns:
    
    type the name used by the database. If the parameter type is a user-defined type, then a fully-qualified type name is returned.
    
    Throws:
    
    SQLException - if a database access error occurs
    
    Since:
    
    1.4
  - getParameterClassName
```
String getParameterClassName(int param)
                      throws SQLException
```
    Retrieves the fully-qualified name of the Java class whose instances should be passed to the method PreparedStatement.setObject.
    
    Parameters:
    
    param - the first parameter is 1, the second is 2, ...
    
    Returns:
    
    the fully-qualified name of the class in the Java programming language that would be used by the method PreparedStatement.setObject to set the value in the specified parameter. This is the class name used for custom mapping.
    
    Throws:
    
    SQLException - if a database access error occurs
    
    Since:
    
    1.4
  - getParameterMode
```
int getParameterMode(int param)
              throws SQLException
```
    Retrieves the designated parameter's mode.
    
    Parameters:
    
    param - the first parameter is 1, the second is 2, ...
    
    Returns:
    
    mode of the parameter; one of ParameterMetaData.parameterModeIn, ParameterMetaData.parameterModeOut, or ParameterMetaData.parameterModeInOut ParameterMetaData.parameterModeUnknown.
    
    Throws:
    
    SQLException - if a database access error occurs
    
    Since:
    
    1.4

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Interface ParameterMetaData

Field Summary

Method Summary

Methods inherited from interface java.sql.Wrapper

Field Detail

parameterNoNulls

parameterNullable

parameterNullableUnknown

parameterModeUnknown

parameterModeIn

parameterModeInOut

parameterModeOut

Method Detail

getParameterCount

isNullable

isSigned

getPrecision

getScale

getParameterType

getParameterTypeName

getParameterClassName

getParameterMode