JavaTM 2 Platform
Std. Ed. v1.4.2

java.sql
Interface ParameterMetaData


public interface ParameterMetaData

An object that can be used to get information about the types and properties of the parameters in a PreparedStatement object.

Since:
1.4

Field Summary
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
 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 number of decimal digits.
 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.
 

Field Detail

parameterNoNulls

public static final int parameterNoNulls
The constant indicating that a parameter will not allow NULL values.

See Also:
Constant Field Values

parameterNullable

public static final int parameterNullable
The constant indicating that a parameter will allow NULL values.

See Also:
Constant Field Values

parameterNullableUnknown

public static final int parameterNullableUnknown
The constant indicating that the nullability of a parameter is unknown.

See Also:
Constant Field Values

parameterModeUnknown

public static final int parameterModeUnknown
The constant indicating that the mode of the parameter is unknown.

See Also:
Constant Field Values

parameterModeIn

public static final int parameterModeIn
The constant indicating that the parameter's mode is IN.

See Also:
Constant Field Values

parameterModeInOut

public static final int parameterModeInOut
The constant indicating that the parameter's mode is INOUT.

See Also:
Constant Field Values

parameterModeOut

public static final int parameterModeOut
The constant indicating that the parameter's mode is OUT.

See Also:
Constant Field Values
Method Detail

getParameterCount

public 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

public 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

public 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

public int getPrecision(int param)
                 throws SQLException
Retrieves the designated parameter's number of decimal digits.

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

public int getScale(int param)
             throws SQLException
Retrieves the designated parameter's number of digits to right of the decimal point.

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

public 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

public 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

public 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

public 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

JavaTM 2 Platform
Std. Ed. v1.4.2

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For further API reference and developer documentation, see Java 2 SDK SE Developer Documentation. That documentation contains more detailed, developer-targeted descriptions, with conceptual overviews, definitions of terms, workarounds, and working code examples.

Copyright 2003 Sun Microsystems, Inc. All rights reserved. Use is subject to license terms. Also see the documentation redistribution policy.


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