org.teiid.connector.jdbc.oracle
Class ConcatFunctionModifier

java.lang.Object
  org.teiid.connector.jdbc.translator.BasicFunctionModifier
      org.teiid.connector.jdbc.oracle.ConcatFunctionModifier

All Implemented Interfaces:

FunctionModifier

public class ConcatFunctionModifier
extends BasicFunctionModifier

This Function modifier used to support ANSI concat on Oracle 9i. TODO: this is no longer necessary on Oracle 10g and later. CONCAT(a, b) ==> CASE WHEN (a is NULL OR b is NULL) THEN NULL ELSE CONCAT(a, b)

Field Summary

Fields inherited from class org.teiid.connector.jdbc.translator.BasicFunctionModifier

BIGDECIMAL, BIGINTEGER, BLOB, BOOLEAN, BYTE, CHAR, CLOB, DATE, DOUBLE, FLOAT, INTEGER, LONG, OBJECT, SHORT, STRING, TIME, TIMESTAMP, typeMap, XML

Constructor Summary

ConcatFunctionModifier(ILanguageFactory langFactory)

Method Summary

IExpression

modify(IFunction function) Subclass should override this method as needed.

Methods inherited from class org.teiid.connector.jdbc.translator.BasicFunctionModifier

translate

Methods inherited from class java.lang.Object

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

Constructor Detail

ConcatFunctionModifier

public ConcatFunctionModifier(ILanguageFactory langFactory)

Parameters:

langFactory -

Method Detail

modify

public IExpression modify(IFunction function)

Description copied from class: BasicFunctionModifier

Subclass should override this method as needed.

Specified by:

modify in interface FunctionModifier

Overrides:

modify in class BasicFunctionModifier

Returns:

IExpression or unmodified function

See Also:

BasicFunctionModifier.modify(org.teiid.connector.language.IFunction)