org.datanucleus.store.rdbms.sql.method

Class StringSubstring3Method

java.lang.Object

org.datanucleus.store.rdbms.sql.method.AbstractSQLMethod

org.datanucleus.store.rdbms.sql.method.StringSubstring3Method

All Implemented Interfaces:

SQLMethod

public class StringSubstring3Method
extends AbstractSQLMethod

Method for evaluating {strExpr}.substring(numExpr1 [,numExpr2]). Returns a StrignExpression that equates to

• SUBSTR(strExpr, numExpr1+1)

  when no end position provided.

• SUBSTR(strExpr, numExpr1+1, numExpr2-numExpr1)

  when end position provided.

Field Summary

Fields inherited from class org.datanucleus.store.rdbms.sql.method.AbstractSQLMethod

clr, exprFactory, stmt

Constructor Summary

Constructors

Constructor and Description
StringSubstring3Method()

Method Summary

Modifier and Type	Method and Description
SQLExpression	getExpression(SQLExpression expr, List<SQLExpression> args) Return the expression for this SQL function.

Methods inherited from class org.datanucleus.store.rdbms.sql.method.AbstractSQLMethod

getMappingForClass, setStatement

Methods inherited from class java.lang.Object

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

Constructor Detail

StringSubstring3Method

public StringSubstring3Method()

Method Detail

getExpression

public SQLExpression getExpression(SQLExpression expr,
                                   List<SQLExpression> args)

Description copied from interface: SQLMethod

Return the expression for this SQL function.

Parameters:

expr - The expression that it is invoked on

args - Arguments passed in

Returns:

The SQL expression using the SQL function