/**
* 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.
*/
package org.apache.hadoop.hive.ql.parse;
import java.util.ArrayList;
import java.util.List;
import org.apache.hadoop.hive.conf.HiveConf;
import org.apache.hadoop.hive.ql.QueryState;
import org.apache.hadoop.hive.ql.session.SessionState;
import org.junit.Assert;
import org.junit.Before;
import org.junit.BeforeClass;
import org.junit.Test;
public class TestQBSubQuery {
static QueryState queryState;
static HiveConf conf;
private static String IN_QUERY = " select * " +
"from src " +
"where src.key in (select key from src s1 where s1.key > '9' and s1.value > '9') ";
private static String IN_QUERY2 = " select * " +
"from src " +
"where src.key in (select key from src s1 where s1.key > '9' and s1.value > '9') and value > '9'";
private static String QUERY3 = "select p_mfgr, min(p_size), rank() over(partition by p_mfgr) as r from part group by p_mfgr";
ParseDriver pd;
SemanticAnalyzer sA;
@BeforeClass
public static void initialize() {
queryState =
new QueryState.Builder().withHiveConf(new HiveConf(SemanticAnalyzer.class)).build();
conf = queryState.getConf();
SessionState.start(conf);
}
@Before
public void setup() throws SemanticException {
pd = new ParseDriver();
sA = new CalcitePlanner(queryState);
}
ASTNode parse(String query) throws ParseException {
ASTNode nd = pd.parse(query);
return (ASTNode) nd.getChild(0);
}
@Test
public void testExtractSubQueries() throws Exception {
ASTNode ast = parse(IN_QUERY);
ASTNode where = where(ast);
List<ASTNode> sqs = SubQueryUtils.findSubQueries((ASTNode) where.getChild(0));
Assert.assertEquals(1,sqs.size());
ASTNode sq = sqs.get(0);
Assert.assertEquals("(tok_subquery_expr (tok_subquery_op kw_in) (tok_query (tok_from (tok_tabref (tok_tabname src) s1)) (tok_insert (tok_destination (tok_dir tok_tmp_file)) (tok_select (tok_selexpr (tok_table_or_col key))) (tok_where (and (> (. (tok_table_or_col s1) key) '9') (> (. (tok_table_or_col s1) value) '9'))))) (. (tok_table_or_col src) key))"
,sq.toStringTree());
}
@Test
public void testExtractConjuncts() throws Exception {
ASTNode ast = parse(IN_QUERY);
ASTNode where = where(ast);
List<ASTNode> sqs = SubQueryUtils.findSubQueries((ASTNode) where.getChild(0));
ASTNode sq = sqs.get(0);
ASTNode sqWhere = where((ASTNode) sq.getChild(1));
List<ASTNode> conjuncts = new ArrayList<ASTNode>();
SubQueryUtils.extractConjuncts((ASTNode) sqWhere.getChild(0), conjuncts);
Assert.assertEquals(2, conjuncts.size());
Assert.assertEquals("(> (. (tok_table_or_col s1) key) '9')", conjuncts.get(0).toStringTree());
Assert.assertEquals("(> (. (tok_table_or_col s1) value) '9')", conjuncts.get(1).toStringTree());
}
@Test
public void testRewriteOuterQueryWhere() throws Exception {
ASTNode ast = parse(IN_QUERY);
ASTNode where = where(ast);
List<ASTNode> sqs = SubQueryUtils.findSubQueries((ASTNode) where.getChild(0));
ASTNode sq = sqs.get(0);
ASTNode newWhere = SubQueryUtils.rewriteParentQueryWhere((ASTNode) where.getChild(0), sq);
Assert.assertEquals("(= 1 1)",newWhere.toStringTree());
}
@Test
public void testRewriteOuterQueryWhere2() throws Exception {
ASTNode ast = parse(IN_QUERY2);
ASTNode where = where(ast);
List<ASTNode> sqs = SubQueryUtils.findSubQueries((ASTNode) where.getChild(0));
ASTNode sq = sqs.get(0);
ASTNode newWhere = SubQueryUtils.rewriteParentQueryWhere((ASTNode) where.getChild(0), sq);
Assert.assertEquals("(> (tok_table_or_col value) '9')",newWhere.toStringTree());
}
@Test
public void testCheckAggOrWindowing() throws Exception {
ASTNode ast = parse(QUERY3);
ASTNode select = select(ast);
Assert.assertEquals(0, SubQueryUtils.checkAggOrWindowing((ASTNode) select.getChild(0)));
Assert.assertEquals(1, SubQueryUtils.checkAggOrWindowing((ASTNode) select.getChild(1)));
Assert.assertEquals(3, SubQueryUtils.checkAggOrWindowing((ASTNode) select.getChild(2)));
}
private ASTNode where(ASTNode qry) {
return (ASTNode) qry.getChild(1).getChild(2);
}
private ASTNode select(ASTNode qry) {
return (ASTNode) qry.getChild(1).getChild(1);
}
}