[HIVE-16317] CASE .. NULL in JOIN condition can trigger SemanticException

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 3.0.0
• Component/s: Query Planning
• Target Version/s: 3.0.0
• Assignee: Remus Rusanu
• Reporter: Remus Rusanu
• Created: 28/Mar/17 16:57
• Updated: 23/May/18 00:00
• Resolved: 20/Apr/17 10:29

Description

hive> explain select a.key from src a join src b on case when a.key=b.key then 1 else null end;
FAILED: SemanticException tok_null encountered with 0 children

"2489e686-bf69-4f37-b733-72491351644b main"
	at org.apache.hadoop.hive.ql.parse.SemanticAnalyzer.parseJoinCondPopulateAlias(SemanticAnalyzer.java:2629)
	at org.apache.hadoop.hive.ql.parse.SemanticAnalyzer.parseJoinCondition(SemanticAnalyzer.java:2904)
	at org.apache.hadoop.hive.ql.parse.SemanticAnalyzer.parseJoinCondition(SemanticAnalyzer.java:2808)
	at org.apache.hadoop.hive.ql.parse.SemanticAnalyzer.genJoinTree(SemanticAnalyzer.java:8916)
	at org.apache.hadoop.hive.ql.parse.SemanticAnalyzer.genPlan(SemanticAnalyzer.java:10506)
	at org.apache.hadoop.hive.ql.parse.SemanticAnalyzer.genPlan(SemanticAnalyzer.java:10419)
	at org.apache.hadoop.hive.ql.parse.CalcitePlanner.genOPTree(CalcitePlanner.java:408)
	at org.apache.hadoop.hive.ql.parse.SemanticAnalyzer.analyzeInternal(SemanticAnalyzer.java:11119)
	at org.apache.hadoop.hive.ql.parse.CalcitePlanner.analyzeInternal(CalcitePlanner.java:286)
	at org.apache.hadoop.hive.ql.parse.BaseSemanticAnalyzer.analyze(BaseSemanticAnalyzer.java:258)
	at org.apache.hadoop.hive.ql.parse.ExplainSemanticAnalyzer.analyzeInternal(ExplainSemanticAnalyzer.java:165)
	at org.apache.hadoop.hive.ql.parse.BaseSemanticAnalyzer.analyze(BaseSemanticAnalyzer.java:258)
	at org.apache.hadoop.hive.ql.Driver.compile(Driver.java:511)
	at org.apache.hadoop.hive.ql.Driver.compileInternal(Driver.java:1316)
	at org.apache.hadoop.hive.ql.Driver.runInternal(Driver.java:1456)
	at org.apache.hadoop.hive.ql.Driver.run(Driver.java:1236)
	at org.apache.hadoop.hive.ql.Driver.run(Driver.java:1226)
	at org.apache.hadoop.hive.cli.CliDriver.processLocalCmd(CliDriver.java:233)
	at org.apache.hadoop.hive.cli.CliDriver.processCmd(CliDriver.java:184)
	at org.apache.hadoop.hive.cli.CliDriver.processLine(CliDriver.java:403)
	at org.apache.hadoop.hive.cli.CliDriver.executeDriver(CliDriver.java:821)
	at org.apache.hadoop.hive.cli.CliDriver.run(CliDriver.java:759)
	at org.apache.hadoop.hive.cli.CliDriver.main(CliDriver.java:686)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(NativeMethodAccessorImpl.java)
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.lang.reflect.Method.invoke(Method.java:498)
	at org.apache.hadoop.util.RunJar.run(RunJar.java:221)
	at org.apache.hadoop.util.RunJar.main(RunJar.java:136)

In HIVE-15708 this causes query31 to fail CBO optimization.

Issue Links

• is related to: HIVE-16479 Non boolean join condition results in runtime error