Vitalii Diravka created DRILL-6070: -------------------------------------- Summary: Hash join with empty tables should not do casting of data types to INT<OPTIONAL> Key: DRILL-6070 URL: https://issues.apache.org/jira/browse/DRILL-6070 Project: Apache Drill Issue Type: Bug Reporter: Vitalii Diravka Fix For: Future
LeftJoin query by leveraging HashJoin operator leads to error, but by using MergeJoin works fine. {code} 0: jdbc:drill:zk=local> alter session set `planner.enable_hashjoin` = true; +-------+-----------------------------------+ | ok | summary | +-------+-----------------------------------+ | true | planner.enable_hashjoin updated. | +-------+-----------------------------------+ 1 row selected (0.078 seconds) 0: jdbc:drill:zk=local> alter session set `planner.enable_mergejoin` = false; +-------+------------------------------------+ | ok | summary | +-------+------------------------------------+ | true | planner.enable_mergejoin updated. | +-------+------------------------------------+ 1 row selected (0.079 seconds) 0: jdbc:drill:zk=local> select t1.a1, t1.b1, t2.a2, t2.b2 from dfs.`/home/vitalii/IdeaProjects/drill-fork/exec/java-exec/target/test-classes/jsoninput/nullable1.json` t1 left join dfs.`/home/vitalii/IdeaProjects/drill-fork/exec/java-exec/src/test/resources/project/pushdown/empty0.json` t2 on t1.b1 = t2.b2; Error: SYSTEM ERROR: DrillRuntimeException: Join only supports implicit casts between 1. Numeric data 2. Varchar, Varbinary data 3. Date, Timestamp data Left type: VARCHAR, Right type: INT. Add explicit casts to avoid this error Fragment 0:0 [Error Id: 2cfc662f-48c2-4e62-a2ea-5a0f33d64c9b on vitalii-pc:31010] (state=,code=0) {code} {code} 00-00 Screen : rowType = RecordType(ANY a1, ANY b1, ANY a2, ANY b2): rowcount = 1.0, cumulative cost = {2.1 rows, 20.1 cpu, 0.0 io, 0.0 network, 17.6 memory}, id = 930 00-01 Project(a1=[$0], b1=[$1], a2=[$2], b2=[$3]) : rowType = RecordType(ANY a1, ANY b1, ANY a2, ANY b2): rowcount = 1.0, cumulative cost = {2.0 rows, 20.0 cpu, 0.0 io, 0.0 network, 17.6 memory}, id = 929 00-02 Project(a1=[$1], b1=[$0], a2=[$3], b2=[$2]) : rowType = RecordType(ANY a1, ANY b1, ANY a2, ANY b2): rowcount = 1.0, cumulative cost = {2.0 rows, 20.0 cpu, 0.0 io, 0.0 network, 17.6 memory}, id = 928 00-03 HashJoin(condition=[=($0, $2)], joinType=[left]) : rowType = RecordType(ANY b1, ANY a1, ANY b2, ANY a2): rowcount = 1.0, cumulative cost = {2.0 rows, 20.0 cpu, 0.0 io, 0.0 network, 17.6 memory}, id = 927 00-05 Scan(groupscan=[EasyGroupScan [selectionRoot=file:/home/vitalii/IdeaProjects/drill-fork/exec/java-exec/target/test-classes/jsoninput/nullable1.json, numFiles=1, columns=[`b1`, `a1`], files=[file:/home/vitalii/IdeaProjects/drill-fork/exec/java-exec/target/test-classes/jsoninput/nullable1.json]]]) : rowType = RecordType(ANY b1, ANY a1): rowcount = 1.0, cumulative cost = {0.0 rows, 0.0 cpu, 0.0 io, 0.0 network, 0.0 memory}, id = 925 00-04 Scan(groupscan=[EasyGroupScan [selectionRoot=file:/home/vitalii/IdeaProjects/drill-fork/exec/java-exec/src/test/resources/project/pushdown/empty0.json, numFiles=1, columns=[`b2`, `a2`], files=[file:/home/vitalii/IdeaProjects/drill-fork/exec/java-exec/src/test/resources/project/pushdown/empty0.json]]]) : rowType = RecordType(ANY b2, ANY a2): rowcount = 1.0, cumulative cost = {0.0 rows, 0.0 cpu, 0.0 io, 0.0 network, 0.0 memory}, id = 926 {code} Left join with empty tables should not do casting of data types to INT<OPTIONAL>. The result should be the same as for MergeJoin operator: {code} 0: jdbc:drill:zk=local> alter session set `planner.enable_hashjoin` = false; +-------+-----------------------------------+ | ok | summary | +-------+-----------------------------------+ | true | planner.enable_hashjoin updated. | +-------+-----------------------------------+ 1 row selected (0.087 seconds) 0: jdbc:drill:zk=local> alter session set `planner.enable_mergejoin` = true; +-------+------------------------------------+ | ok | summary | +-------+------------------------------------+ | true | planner.enable_mergejoin updated. | +-------+------------------------------------+ 1 row selected (0.073 seconds) 0: jdbc:drill:zk=local> select t1.a1, t1.b1, t2.a2, t2.b2 from dfs.`/home/vitalii/IdeaProjects/drill-fork/exec/java-exec/target/test-classes/jsoninput/nullable1.json` t1 left join dfs.`/home/vitalii/IdeaProjects/drill-fork/exec/java-exec/src/test/resources/project/pushdown/empty0.json` t2 on t1.b1 = t2.b2; +-----+-------+-------+-------+ | a1 | b1 | a2 | b2 | +-----+-------+-------+-------+ | 1 | abc | null | null | | 2 | null | null | null | +-----+-------+-------+-------+ 2 rows selected (0.624 seconds) {code} -- This message was sent by Atlassian JIRA (v6.4.14#64029)