Package org.h2.jdbc

Class JdbcParameterMetaData

java.lang.Object

org.h2.message.TraceObject

org.h2.jdbc.JdbcParameterMetaData

All Implemented Interfaces:

ParameterMetaData, Wrapper

public final class JdbcParameterMetaData
extends org.h2.message.TraceObject
implements ParameterMetaData

Information about the parameters of a prepared statement.

Field Summary

Fields inherited from class org.h2.message.TraceObject

ARRAY, BLOB, CALLABLE_STATEMENT, CLOB, CONNECTION, DATA_SOURCE, DATABASE_META_DATA, PARAMETER_META_DATA, PREPARED_STATEMENT, RESULT_SET, RESULT_SET_META_DATA, SAVEPOINT, SQLXML, STATEMENT, trace, XA_DATA_SOURCE, XID

Fields inherited from interface java.sql.ParameterMetaData

parameterModeIn, parameterModeInOut, parameterModeOut, parameterModeUnknown, parameterNoNulls, parameterNullable, parameterNullableUnknown

Method Summary

Modifier and Type	Method	Description
String	getParameterClassName(int param)	Returns the Java class name of the parameter.
int	getParameterCount()	Returns the number of parameters.
int	getParameterMode(int param)	Returns the parameter mode.
int	getParameterType(int param)	Returns the parameter type.
String	getParameterTypeName(int param)	Returns the parameter type name.
int	getPrecision(int param)	Returns the parameter precision.
int	getScale(int param)	Returns the parameter scale.
int	isNullable(int param)	Checks if this is nullable parameter.
boolean	isSigned(int param)	Checks if this parameter is signed.
boolean	isWrapperFor(Class<?> iface)	Checks if unwrap can return an object of this class.
String	toString()	INTERNAL
<T> T	unwrap(Class<T> iface)	Return an object of this class if possible.

Methods inherited from class org.h2.message.TraceObject

debugCode, debugCodeAssign, debugCodeCall, debugCodeCall, debugCodeCall, getNextId, getTraceId, getTraceObjectName, isDebugEnabled, isInfoEnabled, logAndConvert, quote, quoteArray, quoteBigDecimal, quoteBytes, quoteDate, quoteIntArray, quoteMap, quoteTime, quoteTimestamp, setTrace, unsupported

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Method Details

getParameterCount

public int getParameterCount()
                      throws SQLException

Returns the number of parameters.

Specified by:

getParameterCount in interface ParameterMetaData

Returns:

the number

Throws:

SQLException

getParameterMode

public int getParameterMode(int param)
                     throws SQLException

Returns the parameter mode. Always returns parameterModeIn.

Specified by:

getParameterMode in interface ParameterMetaData

Parameters:

param - the column index (1,2,...)

Returns:

parameterModeIn

Throws:

SQLException

getParameterType

public int getParameterType(int param)
                     throws SQLException

Returns the parameter type. java.sql.Types.VARCHAR is returned if the data type is not known.

Specified by:

getParameterType in interface ParameterMetaData

Parameters:

param - the column index (1,2,...)

Returns:

the data type

Throws:

SQLException

getPrecision

public int getPrecision(int param)
                 throws SQLException

Returns the parameter precision. The value 0 is returned if the precision is not known.

Specified by:

getPrecision in interface ParameterMetaData

Parameters:

param - the column index (1,2,...)

Returns:

the precision

Throws:

SQLException

getScale

public int getScale(int param)
             throws SQLException

Returns the parameter scale. The value 0 is returned if the scale is not known.

Specified by:

getScale in interface ParameterMetaData

Parameters:

param - the column index (1,2,...)

Returns:

the scale

Throws:

SQLException

isNullable

public int isNullable(int param)
               throws SQLException

Checks if this is nullable parameter. Returns ResultSetMetaData.columnNullableUnknown..

Specified by:

isNullable in interface ParameterMetaData

Parameters:

param - the column index (1,2,...)

Returns:

ResultSetMetaData.columnNullableUnknown

Throws:

SQLException

isSigned

public boolean isSigned(int param)
                 throws SQLException

Checks if this parameter is signed. It always returns true.

Specified by:

isSigned in interface ParameterMetaData

Parameters:

param - the column index (1,2,...)

Returns:

true

Throws:

SQLException

getParameterClassName

public String getParameterClassName(int param)
                             throws SQLException

Returns the Java class name of the parameter. "java.lang.String" is returned if the type is not known.

Specified by:

getParameterClassName in interface ParameterMetaData

Parameters:

param - the column index (1,2,...)

Returns:

the Java class name

Throws:

SQLException

getParameterTypeName

public String getParameterTypeName(int param)
                            throws SQLException

Returns the parameter type name. "VARCHAR" is returned if the type is not known.

Specified by:

getParameterTypeName in interface ParameterMetaData

Parameters:

param - the column index (1,2,...)

Returns:

the type name

Throws:

SQLException

unwrap

public <T> T unwrap(Class<T> iface)
             throws SQLException

Return an object of this class if possible.

Specified by:

unwrap in interface Wrapper

Parameters:

iface - the class

Returns:

this

Throws:

SQLException

isWrapperFor

public boolean isWrapperFor(Class<?> iface)
                     throws SQLException

Checks if unwrap can return an object of this class.

Specified by:

isWrapperFor in interface Wrapper

Parameters:

iface - the class

Returns:

whether or not the interface is assignable from this class

Throws:

SQLException

toString

public String toString()

INTERNAL

Overrides:

toString in class Object