Benoit Perroud created HIVE-12785:
-------------------------------------
Summary: Views on union types with UDF to return the struct is
broken
Key: HIVE-12785
URL: https://issues.apache.org/jira/browse/HIVE-12785
Project: Hive
Issue Type: Bug
Components: Parser
Affects Versions: 1.2.1
Environment: HDP-2.3.4.0
Reporter: Benoit Perroud
Assignee: Pengcheng Xiong
Priority: Minor
Unfortunately HIVE-12156 is breaking the following use case:
I do have a table with a {{uniontype}} of {{struct}}s, such as:
{code}
CREATE TABLE `minimal_sample`(
`record_type` string,
`event` uniontype<struct<string_value:string>,struct<int_value:int>>)
{code}
In my case, the table comes from an Avro schema which looks like:
{code}
'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\"}]}]}]}'
{code}
I wrote custom UDF to _cast_ the union type to one of the struct to access
nested elements
{code}
CREATE FUNCTION toSint AS 'org.ver.udf.minimal.StructFromUnionMinimalB';
{code}
The code of the UDF is heavily inspired from
http://stackoverflow.com/questions/28362110/hive-querying-records-for-a-specific-uniontype.
A simple query with the UDF is working fine. But creating a view with the same
query is failing when I'm trying to query the view:
{code}
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;
{code}
The stack trace is posted below.
I did try to revert HIVE-12156 from the version I'm running and this use case
is working fine.
{code}
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)
{code}
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