Great. Thanks. Alicia
From: Gašper Metelko <[email protected]<mailto:[email protected]>> Reply-To: "[email protected]<mailto:[email protected]>" <[email protected]<mailto:[email protected]>> Date: Tuesday, September 29, 2015 at 2:50 AM To: "[email protected]<mailto:[email protected]>" <[email protected]<mailto:[email protected]>> Subject: RE: Error with union all and a hint I have created the jira PHOENIX-2295<https://issues.apache.org/jira/browse/PHOENIX-2295>. Running the query without the hint, executes the statment with a full table scan: 0: jdbc:phoenix:localhost> explain SELECT col1, col2 FROM table1 WHERE col1='123'; +------------------------------------------+ | PLAN | +------------------------------------------+ | CLIENT 1-CHUNK PARALLEL 1-WAY FULL SCAN OVER TABLE1 | | SERVER FILTER BY COL1 = '123' | +------------------------------------------+ Running the query wit the hint: 0: jdbc:phoenix:localhost> explain SELECT /*+ INDEX(table1 INDEX_TABLE1_COL) */ col1, col2 FROM table1 WHERE col1='123'; +------------------------------------------+ | PLAN | +------------------------------------------+ | CLIENT 1-CHUNK PARALLEL 1-WAY FULL SCAN OVER TABLE1 | | SKIP-SCAN-JOIN TABLE 0 | | CLIENT 1-CHUNK PARALLEL 1-WAY RANGE SCAN OVER INDEX_TABLE1_COL ['123'] | | SERVER FILTER BY FIRST KEY ONLY | | DYNAMIC SERVER FILTER BY "TABLE1.ID" IN ($72.$74) | +------------------------------------------+ Regards, Gasper From: Alicia Shu [mailto:[email protected]] Sent: Tuesday, September 29, 2015 9:24 AM To: [email protected]<mailto:[email protected]> Subject: Re: Error with union all and a hint By default if there is an index defined for a table, the index will be used if the plan with the index is better. Please file a Jira for the NPE. Thanks, Alicia From: Gašper Metelko <[email protected]<mailto:[email protected]>> Reply-To: "[email protected]<mailto:[email protected]>" <[email protected]<mailto:[email protected]>> Date: Friday, September 25, 2015 at 6:52 AM To: "[email protected]<mailto:[email protected]>" <[email protected]<mailto:[email protected]>> Subject: Error with union all and a hint Hi I have a problem with executing a UNION ALL statment with added hints. I need the hints to be able to use the index. For example: explain SELECT /*+ INDEX(table1 INDEX_TABLE1_COL) */ col1, col2 FROM table1 WHERE col1='123' UNION ALL SELECT /*+ INDEX(table2 INDEX_TABLE2_COL) */ col1, col2 FROM table2 WHERE col1='123'; I get an error: java.lang.NullPointerException at java.util.ArrayList.addAll(ArrayList.java:559) at org.apache.phoenix.iterate.UnionResultIterators.<init>(UnionResultIterators.java:51) at org.apache.phoenix.execute.UnionPlan.iterator(UnionPlan.java:131) at org.apache.phoenix.execute.UnionPlan.iterator(UnionPlan.java:127) at org.apache.phoenix.execute.UnionPlan.getExplainPlan(UnionPlan.java:150) at org.apache.phoenix.jdbc.PhoenixStatement$ExecutableExplainStatement.compilePlan(PhoenixStatement.java:424) at org.apache.phoenix.jdbc.PhoenixStatement$ExecutableExplainStatement.compilePlan(PhoenixStatement.java:403) at org.apache.phoenix.jdbc.PhoenixStatement$1.call(PhoenixStatement.java:246) at org.apache.phoenix.jdbc.PhoenixStatement$1.call(PhoenixStatement.java:241) at org.apache.phoenix.call.CallRunner.run(CallRunner.java:53) at org.apache.phoenix.jdbc.PhoenixStatement.executeQuery(PhoenixStatement.java:240) at org.apache.phoenix.jdbc.PhoenixStatement.execute(PhoenixStatement.java:1250) at sqlline.Commands.execute(Commands.java:822) at sqlline.Commands.sql(Commands.java:732) at sqlline.SqlLine.dispatch(SqlLine.java:808) at sqlline.SqlLine.begin(SqlLine.java:681) at sqlline.SqlLine.start(SqlLine.java:398) at sqlline.SqlLine.main(SqlLine.java:292) I am using phoenix-4.4.0-HBase-1.1, the tables and indexes are as follows. I will greatly appriciate any help. Regards, Gasper CREATE TABLE table1 ( id BIGINT, col1 VARCHAR, col2 VARCHAR, CONSTRAINT pk PRIMARY KEY (id)) IMMUTABLE_ROWS=true; CREATE TABLE table2 ( id BIGINT, col1 VARCHAR, col2 VARCHAR, CONSTRAINT pk PRIMARY KEY (id)) IMMUTABLE_ROWS=true; CREATE INDEX INDEX_TABLE1_COL ON table1 (col1); CREATE INDEX INDEX_TABLE2_COL ON table2 (col1);
