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/**
Licensed to the Apache Software Foundation (ASF) under one or more
contributor license agreements. See the NOTICE file distributed with
this work for additional information regarding copyright ownership.
The ASF licenses this file to You under the Apache License, Version 2.0
(the "License"); you may not use this file except in compliance with
the License. You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
This file is an adaptation of Hive's org/apache/hadoop/hive/ql/IdentifiersParser.g grammar.
*/
parser grammar IdentifiersParser;
options
{
output=AST;
ASTLabelType=CommonTree;
backtrack=false;
k=3;
}
@members {
@Override
public Object recoverFromMismatchedSet(IntStream input,
RecognitionException re, BitSet follow) throws RecognitionException {
throw re;
}
@Override
public void displayRecognitionError(String[] tokenNames,
RecognitionException e) {
gParent.displayRecognitionError(tokenNames, e);
}
protected boolean useSQL11ReservedKeywordsForIdentifier() {
return gParent.useSQL11ReservedKeywordsForIdentifier();
}
}
@rulecatch {
catch (RecognitionException e) {
throw e;
}
}
//-----------------------------------------------------------------------------------
// group by a,b
groupByClause
@init { gParent.pushMsg("group by clause", state); }
@after { gParent.popMsg(state); }
:
KW_GROUP KW_BY
expression
( COMMA expression)*
((rollup=KW_WITH KW_ROLLUP) | (cube=KW_WITH KW_CUBE)) ?
(sets=KW_GROUPING KW_SETS
LPAREN groupingSetExpression ( COMMA groupingSetExpression)* RPAREN ) ?
-> {rollup != null}? ^(TOK_ROLLUP_GROUPBY expression+)
-> {cube != null}? ^(TOK_CUBE_GROUPBY expression+)
-> {sets != null}? ^(TOK_GROUPING_SETS expression+ groupingSetExpression+)
-> ^(TOK_GROUPBY expression+)
;
groupingSetExpression
@init {gParent.pushMsg("grouping set expression", state); }
@after {gParent.popMsg(state); }
:
(LPAREN) => groupingSetExpressionMultiple
|
groupingExpressionSingle
;
groupingSetExpressionMultiple
@init {gParent.pushMsg("grouping set part expression", state); }
@after {gParent.popMsg(state); }
:
LPAREN
expression? (COMMA expression)*
RPAREN
-> ^(TOK_GROUPING_SETS_EXPRESSION expression*)
;
groupingExpressionSingle
@init { gParent.pushMsg("groupingExpression expression", state); }
@after { gParent.popMsg(state); }
:
expression -> ^(TOK_GROUPING_SETS_EXPRESSION expression)
;
havingClause
@init { gParent.pushMsg("having clause", state); }
@after { gParent.popMsg(state); }
:
KW_HAVING havingCondition -> ^(TOK_HAVING havingCondition)
;
havingCondition
@init { gParent.pushMsg("having condition", state); }
@after { gParent.popMsg(state); }
:
expression
;
expressionsInParenthese
:
LPAREN expression (COMMA expression)* RPAREN -> expression+
;
expressionsNotInParenthese
:
expression (COMMA expression)* -> expression+
;
columnRefOrderInParenthese
:
LPAREN columnRefOrder (COMMA columnRefOrder)* RPAREN -> columnRefOrder+
;
columnRefOrderNotInParenthese
:
columnRefOrder (COMMA columnRefOrder)* -> columnRefOrder+
;
// order by a,b
orderByClause
@init { gParent.pushMsg("order by clause", state); }
@after { gParent.popMsg(state); }
:
KW_ORDER KW_BY columnRefOrder ( COMMA columnRefOrder)* -> ^(TOK_ORDERBY columnRefOrder+)
;
clusterByClause
@init { gParent.pushMsg("cluster by clause", state); }
@after { gParent.popMsg(state); }
:
KW_CLUSTER KW_BY
(
(LPAREN) => expressionsInParenthese -> ^(TOK_CLUSTERBY expressionsInParenthese)
|
expressionsNotInParenthese -> ^(TOK_CLUSTERBY expressionsNotInParenthese)
)
;
partitionByClause
@init { gParent.pushMsg("partition by clause", state); }
@after { gParent.popMsg(state); }
:
KW_PARTITION KW_BY
(
(LPAREN) => expressionsInParenthese -> ^(TOK_DISTRIBUTEBY expressionsInParenthese)
|
expressionsNotInParenthese -> ^(TOK_DISTRIBUTEBY expressionsNotInParenthese)
)
;
distributeByClause
@init { gParent.pushMsg("distribute by clause", state); }
@after { gParent.popMsg(state); }
:
KW_DISTRIBUTE KW_BY
(
(LPAREN) => expressionsInParenthese -> ^(TOK_DISTRIBUTEBY expressionsInParenthese)
|
expressionsNotInParenthese -> ^(TOK_DISTRIBUTEBY expressionsNotInParenthese)
)
;
sortByClause
@init { gParent.pushMsg("sort by clause", state); }
@after { gParent.popMsg(state); }
:
KW_SORT KW_BY
(
(LPAREN) => columnRefOrderInParenthese -> ^(TOK_SORTBY columnRefOrderInParenthese)
|
columnRefOrderNotInParenthese -> ^(TOK_SORTBY columnRefOrderNotInParenthese)
)
;
|
