org.h2.jdbc

类 JdbcParameterMetaData

java.lang.Object

org.h2.message.TraceObject

org.h2.jdbc.JdbcParameterMetaData

所有已实现的接口:

ParameterMetaData, Wrapper

public final class JdbcParameterMetaData
extends TraceObject
implements ParameterMetaData

Information about the parameters of a prepared statement.

字段概要

从类继承的字段 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

从接口继承的字段 java.sql.ParameterMetaData

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

方法概要

限定符和类型	方法和说明
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.

从类继承的方法 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

从类继承的方法 java.lang.Object

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

方法详细资料

getParameterCount

public int getParameterCount()
                      throws SQLException

Returns the number of parameters.

指定者:

getParameterCount 在接口中 ParameterMetaData

返回:

the number

抛出:

SQLException

getParameterMode

public int getParameterMode(int param)
                     throws SQLException

Returns the parameter mode. Always returns parameterModeIn.

指定者:

getParameterMode 在接口中 ParameterMetaData

参数:

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

返回:

parameterModeIn

抛出:

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.

指定者:

getParameterType 在接口中 ParameterMetaData

参数:

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

返回:

the data type

抛出:

SQLException

getPrecision

public int getPrecision(int param)
                 throws SQLException

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

指定者:

getPrecision 在接口中 ParameterMetaData

参数:

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

返回:

the precision

抛出:

SQLException

getScale

public int getScale(int param)
             throws SQLException

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

指定者:

getScale 在接口中 ParameterMetaData

参数:

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

返回:

the scale

抛出:

SQLException

isNullable

public int isNullable(int param)
               throws SQLException

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

指定者:

isNullable 在接口中 ParameterMetaData

参数:

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

返回:

ResultSetMetaData.columnNullableUnknown

抛出:

SQLException

isSigned

public boolean isSigned(int param)
                 throws SQLException

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

指定者:

isSigned 在接口中 ParameterMetaData

参数:

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

返回:

true

抛出:

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.

指定者:

getParameterClassName 在接口中 ParameterMetaData

参数:

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

返回:

the Java class name

抛出:

SQLException

getParameterTypeName

public String getParameterTypeName(int param)
                            throws SQLException

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

指定者:

getParameterTypeName 在接口中 ParameterMetaData

参数:

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

返回:

the type name

抛出:

SQLException

unwrap

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

Return an object of this class if possible.

指定者:

unwrap 在接口中 Wrapper

参数:

iface - the class

返回:

this

抛出:

SQLException

isWrapperFor

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

Checks if unwrap can return an object of this class.

指定者:

isWrapperFor 在接口中 Wrapper

参数:

iface - the class

返回:

whether or not the interface is assignable from this class

抛出:

SQLException

toString

public String toString()

INTERNAL

覆盖:

toString 在类中 Object