org.apache.lens.cube.parse

Class UnionQueryWriter

java.lang.Object

org.apache.lens.cube.parse.SimpleHQLContext

org.apache.lens.cube.parse.UnionQueryWriter

All Implemented Interfaces:

QueryWriter

public class UnionQueryWriter
extends SimpleHQLContext

Utility class to write union query. Given any complex Join or Union Candidate, this class rewrites union query for all the participating StorageCandidates.

Field Summary

Fields

Modifier and Type	Field and Description
static String	DUPLICATE_EXPRESSION_PREFIX

Method Summary

Methods inherited from class org.apache.lens.cube.parse.SimpleHQLContext

equals, getFrom, getPrefix, getQueryAst, getWhere, hashCode, setFrom, setPrefix, setWhere, toHQL, toString

Methods inherited from class java.lang.Object

getClass, notify, notifyAll, wait, wait, wait

Field Detail

DUPLICATE_EXPRESSION_PREFIX

public static final String DUPLICATE_EXPRESSION_PREFIX

See Also:

Constant Field Values