Package org.teiid.translator.jdbc.oracle

Class ConcatFunctionModifier

java.lang.Object

org.teiid.translator.jdbc.FunctionModifier

org.teiid.translator.jdbc.oracle.ConcatFunctionModifier

public class ConcatFunctionModifier
extends FunctionModifier

This Function modifier used to support ANSI concat on Oracle 9i. 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.translator.jdbc.FunctionModifier

BIGDECIMAL, BIGINTEGER, BLOB, BOOLEAN, BYTE, CHAR, CLOB, DATE, DOUBLE, FLOAT, GEOGRAPHY, GEOMETRY, INTEGER, JSON, LONG, NULL, OBJECT, SHORT, STRING, TIME, TIMESTAMP, VARBINARY, XML

Constructor Summary

Constructors

Constructor	Description
ConcatFunctionModifier(LanguageFactory langFactory)

Method Summary

Modifier and Type	Method	Description
static boolean	isNotNull(Expression expr)
List<?>	translate(Function function)	Return a List of translated parts (LanguageObjects and Objects), or null if this FunctionModifier wishes to rely on the default translation of the conversion visitor.

Methods inherited from class org.teiid.translator.jdbc.FunctionModifier

getCode

Methods inherited from class java.lang.Object

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

Constructor Detail

ConcatFunctionModifier

public ConcatFunctionModifier(LanguageFactory langFactory)

Parameters:

langFactory -

Method Detail

translate

public List<?> translate(Function function)

Description copied from class: FunctionModifier

Return a List of translated parts (LanguageObjects and Objects), or null if this FunctionModifier wishes to rely on the default translation of the conversion visitor.

Specified by:

translate in class FunctionModifier

Parameters:

function - IFunction to be translated

Returns:

List of translated parts, or null

isNotNull

public static boolean isNotNull(Expression expr)