CallableStatement.java
上传用户:blenddy
上传日期:2007-01-07
资源大小:6495k
文件大小:12k
- package postgresql.jdbc2;
- // IMPORTANT NOTE: This file implements the JDBC 2 version of the driver.
- // If you make any modifications to this file, you must make sure that the
- // changes are also made (if relevent) to the related JDBC 1 class in the
- // postgresql.jdbc1 package.
- import java.sql.*;
- import java.math.*;
- /**
- * CallableStatement is used to execute SQL stored procedures.
- *
- * <p>JDBC provides a stored procedure SQL escape that allows stored
- * procedures to be called in a standard way for all RDBMS's. This escape
- * syntax has one form that includes a result parameter and one that does
- * not. If used, the result parameter must be registered as an OUT
- * parameter. The other parameters may be used for input, output or both.
- * Parameters are refered to sequentially, by number. The first parameter
- * is 1.
- *
- * {?= call <procedure-name>[<arg1>,<arg2>, ...]}
- * {call <procedure-name>[<arg1>,<arg2>, ...]}
- *
- *
- * <p>IN parameter values are set using the set methods inherited from
- * PreparedStatement. The type of all OUT parameters must be registered
- * prior to executing the stored procedure; their values are retrieved
- * after execution via the get methods provided here.
- *
- * <p>A Callable statement may return a ResultSet or multiple ResultSets.
- * Multiple ResultSets are handled using operations inherited from
- * Statement.
- *
- * <p>For maximum portability, a call's ResultSets and update counts should
- * be processed prior to getting the values of output parameters.
- *
- * @see Connection#prepareCall
- * @see ResultSet
- */
- public class CallableStatement extends postgresql.jdbc2.PreparedStatement implements java.sql.CallableStatement
- {
- /**
- * @exception SQLException on failure
- */
- public CallableStatement(Connection c,String q) throws SQLException
- {
- super(c,q);
- }
-
- /**
- * Before executing a stored procedure call you must explicitly
- * call registerOutParameter to register the java.sql.Type of each
- * out parameter.
- *
- * <p>Note: When reading the value of an out parameter, you must use
- * the getXXX method whose Java type XXX corresponds to the
- * parameter's registered SQL type.
- *
- * @param parameterIndex the first parameter is 1, the second is 2,...
- * @param sqlType SQL type code defined by java.sql.Types; for
- * parameters of type Numeric or Decimal use the version of
- * registerOutParameter that accepts a scale value
- * @exception SQLException if a database-access error occurs.
- */
- public void registerOutParameter(int parameterIndex, int sqlType) throws SQLException {
- }
-
- /**
- * You must also specify the scale for numeric/decimal types:
- *
- * <p>Note: When reading the value of an out parameter, you must use
- * the getXXX method whose Java type XXX corresponds to the
- * parameter's registered SQL type.
- *
- * @param parameterIndex the first parameter is 1, the second is 2,...
- * @param sqlType use either java.sql.Type.NUMERIC or java.sql.Type.DECIMAL
- * @param scale a value greater than or equal to zero representing the
- * desired number of digits to the right of the decimal point
- * @exception SQLException if a database-access error occurs.
- */
- public void registerOutParameter(int parameterIndex, int sqlType,
- int scale) throws SQLException
- {
- }
-
- // Old api?
- //public boolean isNull(int parameterIndex) throws SQLException {
- //return true;
- //}
-
- /**
- * An OUT parameter may have the value of SQL NULL; wasNull
- * reports whether the last value read has this special value.
- *
- * <p>Note: You must first call getXXX on a parameter to read its
- * value and then call wasNull() to see if the value was SQL NULL.
- * @return true if the last parameter read was SQL NULL
- * @exception SQLException if a database-access error occurs.
- */
- public boolean wasNull() throws SQLException {
- // check to see if the last access threw an exception
- return false; // fake it for now
- }
-
- // Old api?
- //public String getChar(int parameterIndex) throws SQLException {
- //return null;
- //}
-
- /**
- * Get the value of a CHAR, VARCHAR, or LONGVARCHAR parameter as a
- * Java String.
- *
- * @param parameterIndex the first parameter is 1, the second is 2,...
- * @return the parameter value; if the value is SQL NULL, the result is null
- * @exception SQLException if a database-access error occurs.
- */
- public String getString(int parameterIndex) throws SQLException {
- return null;
- }
- //public String getVarChar(int parameterIndex) throws SQLException {
- // return null;
- //}
-
- //public String getLongVarChar(int parameterIndex) throws SQLException {
- //return null;
- //}
-
- /**
- * Get the value of a BIT parameter as a Java boolean.
- *
- * @param parameterIndex the first parameter is 1, the second is 2,...
- * @return the parameter value; if the value is SQL NULL, the result is false
- * @exception SQLException if a database-access error occurs.
- */
- public boolean getBoolean(int parameterIndex) throws SQLException {
- return false;
- }
-
- /**
- * Get the value of a TINYINT parameter as a Java byte.
- *
- * @param parameterIndex the first parameter is 1, the second is 2,...
- * @return the parameter value; if the value is SQL NULL, the result is 0
- * @exception SQLException if a database-access error occurs.
- */
- public byte getByte(int parameterIndex) throws SQLException {
- return 0;
- }
-
- /**
- * Get the value of a SMALLINT parameter as a Java short.
- *
- * @param parameterIndex the first parameter is 1, the second is 2,...
- * @return the parameter value; if the value is SQL NULL, the result is 0
- * @exception SQLException if a database-access error occurs.
- */
- public short getShort(int parameterIndex) throws SQLException {
- return 0;
- }
-
- /**
- * Get the value of an INTEGER parameter as a Java int.
- *
- * @param parameterIndex the first parameter is 1, the second is 2,...
- * @return the parameter value; if the value is SQL NULL, the result is 0
- * @exception SQLException if a database-access error occurs.
- */
- public int getInt(int parameterIndex) throws SQLException {
- return 0;
- }
-
- /**
- * Get the value of a BIGINT parameter as a Java long.
- *
- * @param parameterIndex the first parameter is 1, the second is 2,...
- * @return the parameter value; if the value is SQL NULL, the result is 0
- * @exception SQLException if a database-access error occurs.
- */
- public long getLong(int parameterIndex) throws SQLException {
- return 0;
- }
-
- /**
- * Get the value of a FLOAT parameter as a Java float.
- *
- * @param parameterIndex the first parameter is 1, the second is 2,...
- * @return the parameter value; if the value is SQL NULL, the result is 0
- * @exception SQLException if a database-access error occurs.
- */
- public float getFloat(int parameterIndex) throws SQLException {
- return (float) 0.0;
- }
-
- /**
- * Get the value of a DOUBLE parameter as a Java double.
- *
- * @param parameterIndex the first parameter is 1, the second is 2,...
- * @return the parameter value; if the value is SQL NULL, the result is 0
- * @exception SQLException if a database-access error occurs.
- */
- public double getDouble(int parameterIndex) throws SQLException {
- return 0.0;
- }
-
- /**
- * Get the value of a NUMERIC parameter as a java.math.BigDecimal
- * object.
- *
- * @param parameterIndex the first parameter is 1, the second is 2,...
- * @param scale a value greater than or equal to zero representing the
- * desired number of digits to the right of the decimal point
- * @return the parameter value; if the value is SQL NULL, the result is null
- * @exception SQLException if a database-access error occurs.
- */
- public BigDecimal getBigDecimal(int parameterIndex, int scale)
- throws SQLException {
- return null;
- }
-
- /**
- * Get the value of a SQL BINARY or VARBINARY parameter as a Java
- * byte[]
- *
- * @param parameterIndex the first parameter is 1, the second is 2,...
- * @return the parameter value; if the value is SQL NULL, the result is null
- * @exception SQLException if a database-access error occurs.
- */
- public byte[] getBytes(int parameterIndex) throws SQLException {
- return null;
- }
-
- // New API (JPM) (getLongVarBinary)
- //public byte[] getBinaryStream(int parameterIndex) throws SQLException {
- //return null;
- //}
-
- /**
- * Get the value of a SQL DATE parameter as a java.sql.Date object
- *
- * @param parameterIndex the first parameter is 1, the second is 2,...
- * @return the parameter value; if the value is SQL NULL, the result is null
- * @exception SQLException if a database-access error occurs.
- */
- public java.sql.Date getDate(int parameterIndex) throws SQLException {
- return null;
- }
-
- /**
- * Get the value of a SQL TIME parameter as a java.sql.Time object.
- *
- * @param parameterIndex the first parameter is 1, the second is 2,...
- * @return the parameter value; if the value is SQL NULL, the result is null
- * @exception SQLException if a database-access error occurs.
- */
- public java.sql.Time getTime(int parameterIndex) throws SQLException {
- return null;
- }
-
- /**
- * Get the value of a SQL TIMESTAMP parameter as a java.sql.Timestamp object.
- *
- * @param parameterIndex the first parameter is 1, the second is 2,...
- * @return the parameter value; if the value is SQL NULL, the result is null
- * @exception SQLException if a database-access error occurs.
- */
- public java.sql.Timestamp getTimestamp(int parameterIndex)
- throws SQLException {
- return null;
- }
-
- //----------------------------------------------------------------------
- // Advanced features:
-
- // You can obtain a ParameterMetaData object to get information
- // about the parameters to this CallableStatement.
- //public DatabaseMetaData getMetaData() {
- //return null;
- //}
-
- // getObject returns a Java object for the parameter.
- // See the JDBC spec's "Dynamic Programming" chapter for details.
- /**
- * Get the value of a parameter as a Java object.
- *
- * <p>This method returns a Java object whose type coresponds to the
- * SQL type that was registered for this parameter using
- * registerOutParameter.
- *
- * <P>Note that this method may be used to read datatabase-specific,
- * abstract data types. This is done by specifying a targetSqlType
- * of java.sql.types.OTHER, which allows the driver to return a
- * database-specific Java type.
- *
- * <p>See the JDBC spec's "Dynamic Programming" chapter for details.
- *
- * @param parameterIndex the first parameter is 1, the second is 2,...
- * @return A java.lang.Object holding the OUT parameter value.
- * @exception SQLException if a database-access error occurs.
- */
- public Object getObject(int parameterIndex)
- throws SQLException {
- return null;
- }
-
- // ** JDBC 2 Extensions **
-
- public Array getArray(int i) throws SQLException
- {
- throw postgresql.Driver.notImplemented();
- }
-
- public java.math.BigDecimal getBigDecimal(int i) throws SQLException
- {
- throw postgresql.Driver.notImplemented();
- }
-
- public Blob getBlob(int i) throws SQLException
- {
- throw postgresql.Driver.notImplemented();
- }
-
- public Clob getClob(int i) throws SQLException
- {
- throw postgresql.Driver.notImplemented();
- }
-
- public Object getObject(int i,java.util.Map map) throws SQLException
- {
- throw postgresql.Driver.notImplemented();
- }
-
- public Ref getRef(int i) throws SQLException
- {
- throw postgresql.Driver.notImplemented();
- }
-
- public java.sql.Date getDate(int i,java.util.Calendar cal) throws SQLException
- {
- throw postgresql.Driver.notImplemented();
- }
-
- public Time getTime(int i,java.util.Calendar cal) throws SQLException
- {
- throw postgresql.Driver.notImplemented();
- }
-
- public Timestamp getTimestamp(int i,java.util.Calendar cal) throws SQLException
- {
- throw postgresql.Driver.notImplemented();
- }
-
- public void registerOutParameter(int parameterIndex, int sqlType,String typeName) throws SQLException
- {
- throw postgresql.Driver.notImplemented();
- }
-
- }