[英]how to call stored function of IN and OUT parameter in Oracle Database using Java
[英]call oracle stored function from java taking no parameter
我在oracle中具有以下功能。
CREATE OR REPLACE function CUSTOMERAPP.procOneParameter
return boolean
IS
BEGIN
return true;
END;
现在,我想从此函数获取返回值。 为此,我有以下代码。
public class CallFunctionFromOracle {
public static void main(String... arg) throws SQLException {
Connection con = null;
CallableStatement callableStmt = null;
try {
// registering Oracle driver class
Class.forName("oracle.jdbc.driver.OracleDriver");
// getting connection
con = DriverManager.getConnection(
"jdbc:oracle:thin:@10.11.201.166:1521:xe", "customerapp", "customerapp");
System.out.println("Connection established successfully!");
callableStmt = con.prepareCall("{ ? = call procOneParameter()}");
//Database function will return value as OUT parameter
callableStmt.registerOutParameter(1, java.sql.Types.NUMERIC);
//IN parameter -
//set methods are used for setting IN parameter values of Stored procedure
// callableStmt.setInt(2, 11);
//Execute database Function,
callableStmt.execute();
// Then retrieve values returned by method using using get methods.
System.out.println("salary = " + callableStmt.getBoolean(1));
System.out.println("Function executed successfully, "
+ "salary has been fetched from Employee table");
} catch (ClassNotFoundException e) {
e.printStackTrace();
} catch (SQLException e) {
e.printStackTrace();
}
finally{
try {
if(callableStmt!=null) callableStmt.close(); //close CallableStatement
if(con!=null) con.close(); // close connection
} catch (SQLException e) {
e.printStackTrace();
}
}
}
}
但是运行此代码会给我以下错误。
java.sql.SQLException: ORA-06550: line 1, column 13:
PLS-00382: expression is of wrong type
ORA-06550: line 1, column 7:
PL/SQL: Statement ignored
at oracle.jdbc.driver.T4CTTIoer.processError(T4CTTIoer.java:440)
at oracle.jdbc.driver.T4CTTIoer.processError(T4CTTIoer.java:396)
at oracle.jdbc.driver.T4C8Oall.processError(T4C8Oall.java:837)
at oracle.jdbc.driver.T4CTTIfun.receive(T4CTTIfun.java:445)
at oracle.jdbc.driver.T4CTTIfun.doRPC(T4CTTIfun.java:191)
at oracle.jdbc.driver.T4C8Oall.doOALL(T4C8Oall.java:523)
at oracle.jdbc.driver.T4CCallableStatement.doOall8(T4CCallableStatement.java:204)
at oracle.jdbc.driver.T4CCallableStatement.executeForRows(T4CCallableStatement.java:1007)
at oracle.jdbc.driver.OracleStatement.doExecuteWithTimeout(OracleStatement.java:1315)
at oracle.jdbc.driver.OraclePreparedStatement.executeInternal(OraclePreparedStatement.java:3576)
at oracle.jdbc.driver.OraclePreparedStatement.execute(OraclePreparedStatement.java:3677)
at oracle.jdbc.driver.OracleCallableStatement.execute(OracleCallableStatement.java:4714)
at oracle.jdbc.driver.OraclePreparedStatementWrapper.execute(OraclePreparedStatementWrapper.java:1374)
at callfunctionfromoracle.CallFunctionFromOracle.main(CallFunctionFromOracle.java:44)
我该如何解决这个错误?
我的问题不可能重复出现这些问题 。 在这里,我谈论的是“ PLS-00382:表达式的类型错误”错误,而在该问题中,用户谈论的是“无效的列类型错误” error。
所以我的问题不同于那个问题。
将prepareCall中的plsql块更改为:
callableStmt = con.prepareCall("begin ? := procOneParameter(); end;");
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