[HIVE-12785] View with union type and UDF to `cast` the struct is broken

• Type: Bug
• Status: Closed
• Priority: Minor
• Resolution: Fixed
• Affects Version/s: 1.2.1
• Fix Version/s: 2.0.0
• Component/s: Parser

Environment

HDP-2.3.4.0

• Assignee: Pengcheng Xiong
• Reporter: Benoit Perroud
• Created: 05/Jan/16 21:55
• Updated: 02/Jun/16 10:17
• Resolved: 12/Jan/16 18:30

Description

Unfortunately HIVE-12156 is breaking the following use case:

I do have a table with a uniontype of struct s, such as:

CREATE TABLE `minimal_sample`(
  `record_type` string,
  `event` uniontype<struct<string_value:string>,struct<int_value:int>>)

In my case, the table comes from an Avro schema which looks like:

  'avro.schema.literal'='{\"type\":\"record\",\"name\":\"Minimal\",\"namespace\":\"org.ver.vkanalas.minimalsamp\",\"fields\":[{\"name\":\"record_type\",\"type\":\"string\"},{\"name\":\"event\",\"type\":[{\"type\":\"record\",\"name\":\"a\",\"fields\":[{\"name\":\"string_value\",\"type\":\"string\"}]},{\"type\":\"record\",\"name\":\"b\",\"fields\":[{\"name\":\"int_value\",\"type\":\"int\"}]}]}]}'

I wrote custom UDF (source attached) to cast the union type to one of the struct to access nested elements, such as int_value in my example.

CREATE FUNCTION toSint AS 'org.ver.udf.minimal.StructFromUnionMinimalB';

A simple query with the UDF is working fine. But creating a view with the same select is failing when I'm trying to query it:

CREATE OR REPLACE VIEW minimal_sample_viewB AS SELECT toSint(event).int_value FROM minimal_sample WHERE record_type = 'B';

SELECT * FROM minimal_sample_viewB;

The stack trace is posted below.

I did try to revert (or exclude) HIVE-12156 from the version I'm running and this use case is working fine.

FAILED: SemanticException Line 0:-1 . Operator is only supported on struct or list of struct types 'int_value' in definition of VIEW minimal_sample_viewb [
SELECT null.`int_value` FROM `default`.`minimal_sample` WHERE `minimal_sample`.`record_type` = 'B'
] used as minimal_sample_viewb at Line 3:14
16/01/05 22:49:41 [main]: ERROR ql.Driver: FAILED: SemanticException Line 0:-1 . Operator is only supported on struct or list of struct types 'int_value' in definition of VIEW minimal_sample_viewb [
SELECT null.`int_value` FROM `default`.`minimal_sample` WHERE `minimal_sample`.`record_type` = 'B'
] used as minimal_sample_viewb at Line 3:14
org.apache.hadoop.hive.ql.parse.SemanticException: Line 0:-1 . Operator is only supported on struct or list of struct types 'int_value' in definition of VIEW minimal_sample_viewb [
SELECT null.`int_value` FROM `default`.`minimal_sample` WHERE `minimal_sample`.`record_type` = 'B'
] used as minimal_sample_viewb at Line 3:14
	at org.apache.hadoop.hive.ql.parse.TypeCheckProcFactory$DefaultExprProcessor.getXpathOrFuncExprNodeDesc(TypeCheckProcFactory.java:893)
	at org.apache.hadoop.hive.ql.parse.TypeCheckProcFactory$DefaultExprProcessor.process(TypeCheckProcFactory.java:1321)
	at org.apache.hadoop.hive.ql.lib.DefaultRuleDispatcher.dispatch(DefaultRuleDispatcher.java:90)
	at org.apache.hadoop.hive.ql.lib.DefaultGraphWalker.dispatchAndReturn(DefaultGraphWalker.java:95)
	at org.apache.hadoop.hive.ql.lib.DefaultGraphWalker.dispatch(DefaultGraphWalker.java:79)
	at org.apache.hadoop.hive.ql.lib.DefaultGraphWalker.walk(DefaultGraphWalker.java:133)
	at org.apache.hadoop.hive.ql.lib.DefaultGraphWalker.startWalking(DefaultGraphWalker.java:110)
	at org.apache.hadoop.hive.ql.parse.TypeCheckProcFactory.genExprNode(TypeCheckProcFactory.java:209)
	at org.apache.hadoop.hive.ql.parse.TypeCheckProcFactory.genExprNode(TypeCheckProcFactory.java:153)
	at org.apache.hadoop.hive.ql.parse.SemanticAnalyzer.genAllExprNodeDesc(SemanticAnalyzer.java:10500)
	at org.apache.hadoop.hive.ql.parse.SemanticAnalyzer.genExprNodeDesc(SemanticAnalyzer.java:10455)
	at org.apache.hadoop.hive.ql.parse.SemanticAnalyzer.genSelectPlan(SemanticAnalyzer.java:3822)
	at org.apache.hadoop.hive.ql.parse.SemanticAnalyzer.genSelectPlan(SemanticAnalyzer.java:3601)
	at org.apache.hadoop.hive.ql.parse.SemanticAnalyzer.genPostGroupByBodyPlan(SemanticAnalyzer.java:8943)
	at org.apache.hadoop.hive.ql.parse.SemanticAnalyzer.genBodyPlan(SemanticAnalyzer.java:8898)
	at org.apache.hadoop.hive.ql.parse.SemanticAnalyzer.genPlan(SemanticAnalyzer.java:9743)
	at org.apache.hadoop.hive.ql.parse.SemanticAnalyzer.genPlan(SemanticAnalyzer.java:9623)
	at org.apache.hadoop.hive.ql.parse.SemanticAnalyzer.genPlan(SemanticAnalyzer.java:9650)
	at org.apache.hadoop.hive.ql.parse.SemanticAnalyzer.genPlan(SemanticAnalyzer.java:9636)
	at org.apache.hadoop.hive.ql.parse.SemanticAnalyzer.genOPTree(SemanticAnalyzer.java:10109)
	at org.apache.hadoop.hive.ql.parse.CalcitePlanner.genOPTree(CalcitePlanner.java:329)
	at org.apache.hadoop.hive.ql.parse.SemanticAnalyzer.analyzeInternal(SemanticAnalyzer.java:10120)
	at org.apache.hadoop.hive.ql.parse.CalcitePlanner.analyzeInternal(CalcitePlanner.java:211)
	at org.apache.hadoop.hive.ql.parse.BaseSemanticAnalyzer.analyze(BaseSemanticAnalyzer.java:227)
	at org.apache.hadoop.hive.ql.Driver.compile(Driver.java:454)
	at org.apache.hadoop.hive.ql.Driver.compile(Driver.java:314)
	at org.apache.hadoop.hive.ql.Driver.compileInternal(Driver.java:1164)
	at org.apache.hadoop.hive.ql.Driver.runInternal(Driver.java:1212)
	at org.apache.hadoop.hive.ql.Driver.run(Driver.java:1101)
	at org.apache.hadoop.hive.ql.Driver.run(Driver.java:1091)
	at org.apache.hadoop.hive.cli.CliDriver.processLocalCmd(CliDriver.java:216)
	at org.apache.hadoop.hive.cli.CliDriver.processCmd(CliDriver.java:168)
	at org.apache.hadoop.hive.cli.CliDriver.processLine(CliDriver.java:379)
	at org.apache.hadoop.hive.cli.CliDriver.processLine(CliDriver.java:314)
	at org.apache.hadoop.hive.cli.CliDriver.processReader(CliDriver.java:412)
	at org.apache.hadoop.hive.cli.CliDriver.processFile(CliDriver.java:428)
	at org.apache.hadoop.hive.cli.CliDriver.executeDriver(CliDriver.java:717)
	at org.apache.hadoop.hive.cli.CliDriver.run(CliDriver.java:684)
	at org.apache.hadoop.hive.cli.CliDriver.main(CliDriver.java:624)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.lang.reflect.Method.invoke(Method.java:497)
	at org.apache.hadoop.util.RunJar.run(RunJar.java:221)
	at org.apache.hadoop.util.RunJar.main(RunJar.java:136)

Issue Links

• is broken by: HIVE-12156 expanding view doesn't quote reserved keyword