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Posted to dev@pig.apache.org by "Olga Natkovich (JIRA)" <ji...@apache.org> on 2008/12/24 02:04:44 UTC
[jira] Created: (PIG-577) outer join query looses name information
outer join query looses name information
----------------------------------------
Key: PIG-577
URL: https://issues.apache.org/jira/browse/PIG-577
Project: Pig
Issue Type: Bug
Affects Versions: types_branch
Reporter: Olga Natkovich
Fix For: types_branch
The following query:
A = LOAD 'student_data' AS (name: chararray, age: int, gpa: float);
B = LOAD 'voter_data' AS (name: chararray, age: int, registration: chararray, contributions: float);
C = COGROUP A BY name, B BY name;
D = FOREACH C GENERATE group, flatten((IsEmpty(A) ? null : A)), flatten((IsEmpty(B) ? null : B));
describe D;
E = FOREACH D GENERATE A::gpa, B::contributions;
Give the following error: (Even though describe shows correct information: D: {group: chararray,A::name: chararray,A::age: int,A::gpa: float,B::name: chararray,B::age: int,B::registration: chararray,B::contributions: float}
java.io.IOException: Invalid alias: A::gpa in {group: chararray,bytearray,bytearray}
at org.apache.pig.PigServer.parseQuery(PigServer.java:298)
at org.apache.pig.PigServer.registerQuery(PigServer.java:263)
at org.apache.pig.tools.grunt.GruntParser.processPig(GruntParser.java:439)
at org.apache.pig.tools.pigscript.parser.PigScriptParser.parse(PigScriptParser.java:249)
at org.apache.pig.tools.grunt.GruntParser.parseStopOnError(GruntParser.java:84)
at org.apache.pig.tools.grunt.Grunt.exec(Grunt.java:64)
at org.apache.pig.Main.main(Main.java:306)
Caused by: org.apache.pig.impl.logicalLayer.parser.ParseException: Invalid alias: A::gpa in {group: chararray,bytearray,bytearray}
at org.apache.pig.impl.logicalLayer.parser.QueryParser.AliasFieldOrSpec(QueryParser.java:5930)
at org.apache.pig.impl.logicalLayer.parser.QueryParser.ColOrSpec(QueryParser.java:5788)
at org.apache.pig.impl.logicalLayer.parser.QueryParser.BaseEvalSpec(QueryParser.java:3974)
at org.apache.pig.impl.logicalLayer.parser.QueryParser.UnaryExpr(QueryParser.java:3871)
at org.apache.pig.impl.logicalLayer.parser.QueryParser.CastExpr(QueryParser.java:3825)
at org.apache.pig.impl.logicalLayer.parser.QueryParser.MultiplicativeExpr(QueryParser.java:3734)
at org.apache.pig.impl.logicalLayer.parser.QueryParser.AdditiveExpr(QueryParser.java:3660)
at org.apache.pig.impl.logicalLayer.parser.QueryParser.InfixExpr(QueryParser.java:3626)
at org.apache.pig.impl.logicalLayer.parser.QueryParser.FlattenedGenerateItem(QueryParser.java:3552)
at org.apache.pig.impl.logicalLayer.parser.QueryParser.FlattenedGenerateItemList(QueryParser.java:3462)
at org.apache.pig.impl.logicalLayer.parser.QueryParser.GenerateStatement(QueryParser.java:3419)
at org.apache.pig.impl.logicalLayer.parser.QueryParser.NestedBlock(QueryParser.java:2894)
at org.apache.pig.impl.logicalLayer.parser.QueryParser.ForEachClause(QueryParser.java:2309)
at org.apache.pig.impl.logicalLayer.parser.QueryParser.BaseExpr(QueryParser.java:966)
at org.apache.pig.impl.logicalLayer.parser.QueryParser.Expr(QueryParser.java:742)
at org.apache.pig.impl.logicalLayer.parser.QueryParser.Parse(QueryParser.java:537)
at org.apache.pig.impl.logicalLayer.LogicalPlanBuilder.parse(LogicalPlanBuilder.java:60)
at org.apache.pig.PigServer.parseQuery(PigServer.java:295)
... 6 more
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[jira] Updated: (PIG-577) outer join query looses name information
Posted by "Santhosh Srinivasan (JIRA)" <ji...@apache.org>.
[ https://issues.apache.org/jira/browse/PIG-577?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Santhosh Srinivasan updated PIG-577:
------------------------------------
Attachment: PIG-577.patch
Attached patch fixes the issue of schema comparisons that fail during an outer join specification. In addition a minor issue regarding the creation of the log file for PIG errors has been resolved. All unit tests pass.
> outer join query looses name information
> ----------------------------------------
>
> Key: PIG-577
> URL: https://issues.apache.org/jira/browse/PIG-577
> Project: Pig
> Issue Type: Bug
> Affects Versions: types_branch
> Reporter: Olga Natkovich
> Assignee: Santhosh Srinivasan
> Fix For: types_branch
>
> Attachments: PIG-577.patch
>
>
> The following query:
> A = LOAD 'student_data' AS (name: chararray, age: int, gpa: float);
> B = LOAD 'voter_data' AS (name: chararray, age: int, registration: chararray, contributions: float);
> C = COGROUP A BY name, B BY name;
> D = FOREACH C GENERATE group, flatten((IsEmpty(A) ? null : A)), flatten((IsEmpty(B) ? null : B));
> describe D;
> E = FOREACH D GENERATE A::gpa, B::contributions;
> Give the following error: (Even though describe shows correct information: D: {group: chararray,A::name: chararray,A::age: int,A::gpa: float,B::name: chararray,B::age: int,B::registration: chararray,B::contributions: float}
> java.io.IOException: Invalid alias: A::gpa in {group: chararray,bytearray,bytearray}
> at org.apache.pig.PigServer.parseQuery(PigServer.java:298)
> at org.apache.pig.PigServer.registerQuery(PigServer.java:263)
> at org.apache.pig.tools.grunt.GruntParser.processPig(GruntParser.java:439)
> at org.apache.pig.tools.pigscript.parser.PigScriptParser.parse(PigScriptParser.java:249)
> at org.apache.pig.tools.grunt.GruntParser.parseStopOnError(GruntParser.java:84)
> at org.apache.pig.tools.grunt.Grunt.exec(Grunt.java:64)
> at org.apache.pig.Main.main(Main.java:306)
> Caused by: org.apache.pig.impl.logicalLayer.parser.ParseException: Invalid alias: A::gpa in {group: chararray,bytearray,bytearray}
> at org.apache.pig.impl.logicalLayer.parser.QueryParser.AliasFieldOrSpec(QueryParser.java:5930)
> at org.apache.pig.impl.logicalLayer.parser.QueryParser.ColOrSpec(QueryParser.java:5788)
> at org.apache.pig.impl.logicalLayer.parser.QueryParser.BaseEvalSpec(QueryParser.java:3974)
> at org.apache.pig.impl.logicalLayer.parser.QueryParser.UnaryExpr(QueryParser.java:3871)
> at org.apache.pig.impl.logicalLayer.parser.QueryParser.CastExpr(QueryParser.java:3825)
> at org.apache.pig.impl.logicalLayer.parser.QueryParser.MultiplicativeExpr(QueryParser.java:3734)
> at org.apache.pig.impl.logicalLayer.parser.QueryParser.AdditiveExpr(QueryParser.java:3660)
> at org.apache.pig.impl.logicalLayer.parser.QueryParser.InfixExpr(QueryParser.java:3626)
> at org.apache.pig.impl.logicalLayer.parser.QueryParser.FlattenedGenerateItem(QueryParser.java:3552)
> at org.apache.pig.impl.logicalLayer.parser.QueryParser.FlattenedGenerateItemList(QueryParser.java:3462)
> at org.apache.pig.impl.logicalLayer.parser.QueryParser.GenerateStatement(QueryParser.java:3419)
> at org.apache.pig.impl.logicalLayer.parser.QueryParser.NestedBlock(QueryParser.java:2894)
> at org.apache.pig.impl.logicalLayer.parser.QueryParser.ForEachClause(QueryParser.java:2309)
> at org.apache.pig.impl.logicalLayer.parser.QueryParser.BaseExpr(QueryParser.java:966)
> at org.apache.pig.impl.logicalLayer.parser.QueryParser.Expr(QueryParser.java:742)
> at org.apache.pig.impl.logicalLayer.parser.QueryParser.Parse(QueryParser.java:537)
> at org.apache.pig.impl.logicalLayer.LogicalPlanBuilder.parse(LogicalPlanBuilder.java:60)
> at org.apache.pig.PigServer.parseQuery(PigServer.java:295)
> ... 6 more
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[jira] Commented: (PIG-577) outer join query looses name
information
Posted by "Santhosh Srinivasan (JIRA)" <ji...@apache.org>.
[ https://issues.apache.org/jira/browse/PIG-577?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12659144#action_12659144 ]
Santhosh Srinivasan commented on PIG-577:
-----------------------------------------
The correct statement to make mimic the outer join semantics will be:
{code}
D = FOREACH C GENERATE group, flatten((not IsEmpty(A) ? A : (bag{tuple(chararray, int, float)}){(null, null, null)})), flatten((not IsEmpty(B) ? B : (bag{tuple(chararray, int, chararray, float)}){(null,null,null, null)}));
{code}
However, this exposed a bag in the type checker where the schemas of the LHS and RHS do not match. The bag with the null constants has a tuple and relation A(or B) has a schema without the tuple. This issue was resolved in PIG-449. The solution proposed in PIG-449 has to be extended to schema comparisons that involve bags.
{code}
2008-12-24 10:31:58,529 [main] ERROR org.apache.pig.tools.grunt.Grunt - Two inputs of BinCond must have compatible schemas
2008-12-24 10:31:58,529 [main] ERROR org.apache.pig.tools.grunt.Grunt - org.apache.pig.impl.logicalLayer.FrontendException: Unable to describe schema for alias D
at org.apache.pig.PigServer.dumpSchema(PigServer.java:367)
at org.apache.pig.tools.grunt.GruntParser.processDescribe(GruntParser.java:153)
at org.apache.pig.tools.pigscript.parser.PigScriptParser.parse(PigScriptParser.java:188)
at org.apache.pig.tools.grunt.GruntParser.parseStopOnError(GruntParser.java:84)
at org.apache.pig.tools.grunt.Grunt.run(Grunt.java:71)
at org.apache.pig.Main.main(Main.java:302)
Caused by: org.apache.pig.impl.plan.PlanValidationException: An unexpected exception caused the validation to stop
at org.apache.pig.impl.plan.PlanValidator.validateSkipCollectException(PlanValidator.java:104)
at org.apache.pig.impl.logicalLayer.validators.TypeCheckingValidator.validate(TypeCheckingValidator.java:40)
at org.apache.pig.impl.logicalLayer.validators.TypeCheckingValidator.validate(TypeCheckingValidator.java:30)
at org.apache.pig.impl.logicalLayer.validators.LogicalPlanValidationExecutor.validate(LogicalPlanValidationExecutor.java:79)
at org.apache.pig.PigServer.compileLp(PigServer.java:687)
at org.apache.pig.PigServer.dumpSchema(PigServer.java:360)
... 5 more
Caused by: org.apache.pig.impl.logicalLayer.validators.TypeCheckerException: Cannot resolve ForEach output schema.
at org.apache.pig.impl.logicalLayer.validators.TypeCheckingVisitor.visit(TypeCheckingVisitor.java:2731)
at org.apache.pig.impl.logicalLayer.LOForEach.visit(LOForEach.java:122)
at org.apache.pig.impl.logicalLayer.LOForEach.visit(LOForEach.java:41)
at org.apache.pig.impl.plan.DependencyOrderWalker.walk(DependencyOrderWalker.java:68)
at org.apache.pig.impl.plan.PlanVisitor.visit(PlanVisitor.java:51)
at org.apache.pig.impl.plan.PlanValidator.validateSkipCollectException(PlanValidator.java:101)
... 10 more
Caused by: org.apache.pig.impl.logicalLayer.validators.TypeCheckerException: Problem during evaluaton of BinCond output type
at org.apache.pig.impl.logicalLayer.validators.TypeCheckingVisitor.visit(TypeCheckingVisitor.java:1913)
at org.apache.pig.impl.logicalLayer.LOBinCond.visit(LOBinCond.java:88)
at org.apache.pig.impl.logicalLayer.LOBinCond.visit(LOBinCond.java:27)
at org.apache.pig.impl.plan.DependencyOrderWalker.walk(DependencyOrderWalker.java:68)
at org.apache.pig.impl.plan.PlanVisitor.visit(PlanVisitor.java:51)
at org.apache.pig.impl.logicalLayer.validators.TypeCheckingVisitor.checkInnerPlan(TypeCheckingVisitor.java:2812)
at org.apache.pig.impl.logicalLayer.validators.TypeCheckingVisitor.visit(TypeCheckingVisitor.java:2720)
... 15 more
Caused by: org.apache.pig.impl.logicalLayer.validators.TypeCheckerException: Two inputs of BinCond must have compatible schemas
at org.apache.pig.impl.logicalLayer.validators.TypeCheckingVisitor.visit(TypeCheckingVisitor.java:1903)
... 21 more
{code}
> outer join query looses name information
> ----------------------------------------
>
> Key: PIG-577
> URL: https://issues.apache.org/jira/browse/PIG-577
> Project: Pig
> Issue Type: Bug
> Affects Versions: types_branch
> Reporter: Olga Natkovich
> Fix For: types_branch
>
>
> The following query:
> A = LOAD 'student_data' AS (name: chararray, age: int, gpa: float);
> B = LOAD 'voter_data' AS (name: chararray, age: int, registration: chararray, contributions: float);
> C = COGROUP A BY name, B BY name;
> D = FOREACH C GENERATE group, flatten((IsEmpty(A) ? null : A)), flatten((IsEmpty(B) ? null : B));
> describe D;
> E = FOREACH D GENERATE A::gpa, B::contributions;
> Give the following error: (Even though describe shows correct information: D: {group: chararray,A::name: chararray,A::age: int,A::gpa: float,B::name: chararray,B::age: int,B::registration: chararray,B::contributions: float}
> java.io.IOException: Invalid alias: A::gpa in {group: chararray,bytearray,bytearray}
> at org.apache.pig.PigServer.parseQuery(PigServer.java:298)
> at org.apache.pig.PigServer.registerQuery(PigServer.java:263)
> at org.apache.pig.tools.grunt.GruntParser.processPig(GruntParser.java:439)
> at org.apache.pig.tools.pigscript.parser.PigScriptParser.parse(PigScriptParser.java:249)
> at org.apache.pig.tools.grunt.GruntParser.parseStopOnError(GruntParser.java:84)
> at org.apache.pig.tools.grunt.Grunt.exec(Grunt.java:64)
> at org.apache.pig.Main.main(Main.java:306)
> Caused by: org.apache.pig.impl.logicalLayer.parser.ParseException: Invalid alias: A::gpa in {group: chararray,bytearray,bytearray}
> at org.apache.pig.impl.logicalLayer.parser.QueryParser.AliasFieldOrSpec(QueryParser.java:5930)
> at org.apache.pig.impl.logicalLayer.parser.QueryParser.ColOrSpec(QueryParser.java:5788)
> at org.apache.pig.impl.logicalLayer.parser.QueryParser.BaseEvalSpec(QueryParser.java:3974)
> at org.apache.pig.impl.logicalLayer.parser.QueryParser.UnaryExpr(QueryParser.java:3871)
> at org.apache.pig.impl.logicalLayer.parser.QueryParser.CastExpr(QueryParser.java:3825)
> at org.apache.pig.impl.logicalLayer.parser.QueryParser.MultiplicativeExpr(QueryParser.java:3734)
> at org.apache.pig.impl.logicalLayer.parser.QueryParser.AdditiveExpr(QueryParser.java:3660)
> at org.apache.pig.impl.logicalLayer.parser.QueryParser.InfixExpr(QueryParser.java:3626)
> at org.apache.pig.impl.logicalLayer.parser.QueryParser.FlattenedGenerateItem(QueryParser.java:3552)
> at org.apache.pig.impl.logicalLayer.parser.QueryParser.FlattenedGenerateItemList(QueryParser.java:3462)
> at org.apache.pig.impl.logicalLayer.parser.QueryParser.GenerateStatement(QueryParser.java:3419)
> at org.apache.pig.impl.logicalLayer.parser.QueryParser.NestedBlock(QueryParser.java:2894)
> at org.apache.pig.impl.logicalLayer.parser.QueryParser.ForEachClause(QueryParser.java:2309)
> at org.apache.pig.impl.logicalLayer.parser.QueryParser.BaseExpr(QueryParser.java:966)
> at org.apache.pig.impl.logicalLayer.parser.QueryParser.Expr(QueryParser.java:742)
> at org.apache.pig.impl.logicalLayer.parser.QueryParser.Parse(QueryParser.java:537)
> at org.apache.pig.impl.logicalLayer.LogicalPlanBuilder.parse(LogicalPlanBuilder.java:60)
> at org.apache.pig.PigServer.parseQuery(PigServer.java:295)
> ... 6 more
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[jira] Assigned: (PIG-577) outer join query looses name information
Posted by "Santhosh Srinivasan (JIRA)" <ji...@apache.org>.
[ https://issues.apache.org/jira/browse/PIG-577?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Santhosh Srinivasan reassigned PIG-577:
---------------------------------------
Assignee: Santhosh Srinivasan
> outer join query looses name information
> ----------------------------------------
>
> Key: PIG-577
> URL: https://issues.apache.org/jira/browse/PIG-577
> Project: Pig
> Issue Type: Bug
> Affects Versions: types_branch
> Reporter: Olga Natkovich
> Assignee: Santhosh Srinivasan
> Fix For: types_branch
>
>
> The following query:
> A = LOAD 'student_data' AS (name: chararray, age: int, gpa: float);
> B = LOAD 'voter_data' AS (name: chararray, age: int, registration: chararray, contributions: float);
> C = COGROUP A BY name, B BY name;
> D = FOREACH C GENERATE group, flatten((IsEmpty(A) ? null : A)), flatten((IsEmpty(B) ? null : B));
> describe D;
> E = FOREACH D GENERATE A::gpa, B::contributions;
> Give the following error: (Even though describe shows correct information: D: {group: chararray,A::name: chararray,A::age: int,A::gpa: float,B::name: chararray,B::age: int,B::registration: chararray,B::contributions: float}
> java.io.IOException: Invalid alias: A::gpa in {group: chararray,bytearray,bytearray}
> at org.apache.pig.PigServer.parseQuery(PigServer.java:298)
> at org.apache.pig.PigServer.registerQuery(PigServer.java:263)
> at org.apache.pig.tools.grunt.GruntParser.processPig(GruntParser.java:439)
> at org.apache.pig.tools.pigscript.parser.PigScriptParser.parse(PigScriptParser.java:249)
> at org.apache.pig.tools.grunt.GruntParser.parseStopOnError(GruntParser.java:84)
> at org.apache.pig.tools.grunt.Grunt.exec(Grunt.java:64)
> at org.apache.pig.Main.main(Main.java:306)
> Caused by: org.apache.pig.impl.logicalLayer.parser.ParseException: Invalid alias: A::gpa in {group: chararray,bytearray,bytearray}
> at org.apache.pig.impl.logicalLayer.parser.QueryParser.AliasFieldOrSpec(QueryParser.java:5930)
> at org.apache.pig.impl.logicalLayer.parser.QueryParser.ColOrSpec(QueryParser.java:5788)
> at org.apache.pig.impl.logicalLayer.parser.QueryParser.BaseEvalSpec(QueryParser.java:3974)
> at org.apache.pig.impl.logicalLayer.parser.QueryParser.UnaryExpr(QueryParser.java:3871)
> at org.apache.pig.impl.logicalLayer.parser.QueryParser.CastExpr(QueryParser.java:3825)
> at org.apache.pig.impl.logicalLayer.parser.QueryParser.MultiplicativeExpr(QueryParser.java:3734)
> at org.apache.pig.impl.logicalLayer.parser.QueryParser.AdditiveExpr(QueryParser.java:3660)
> at org.apache.pig.impl.logicalLayer.parser.QueryParser.InfixExpr(QueryParser.java:3626)
> at org.apache.pig.impl.logicalLayer.parser.QueryParser.FlattenedGenerateItem(QueryParser.java:3552)
> at org.apache.pig.impl.logicalLayer.parser.QueryParser.FlattenedGenerateItemList(QueryParser.java:3462)
> at org.apache.pig.impl.logicalLayer.parser.QueryParser.GenerateStatement(QueryParser.java:3419)
> at org.apache.pig.impl.logicalLayer.parser.QueryParser.NestedBlock(QueryParser.java:2894)
> at org.apache.pig.impl.logicalLayer.parser.QueryParser.ForEachClause(QueryParser.java:2309)
> at org.apache.pig.impl.logicalLayer.parser.QueryParser.BaseExpr(QueryParser.java:966)
> at org.apache.pig.impl.logicalLayer.parser.QueryParser.Expr(QueryParser.java:742)
> at org.apache.pig.impl.logicalLayer.parser.QueryParser.Parse(QueryParser.java:537)
> at org.apache.pig.impl.logicalLayer.LogicalPlanBuilder.parse(LogicalPlanBuilder.java:60)
> at org.apache.pig.PigServer.parseQuery(PigServer.java:295)
> ... 6 more
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[jira] Commented: (PIG-577) outer join query looses name
information
Posted by "David Ciemiewicz (JIRA)" <ji...@apache.org>.
[ https://issues.apache.org/jira/browse/PIG-577?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12659119#action_12659119 ]
David Ciemiewicz commented on PIG-577:
--------------------------------------
Note that while this workaround does solve the schema problem, the resulting tuples in D will not have sufficient null elements if either A or B is null. Especially if A is null.
Semantically, ït seems that the correct D statement should be something like:
D = FOREACH C GENERATE group, flatten((not IsEmpty(A) ? A: (null,null,null) ), flatten((not IsEmpty(B) ? B: (null,null,null) ));
However, this generates all sorts of parse errors.
> outer join query looses name information
> ----------------------------------------
>
> Key: PIG-577
> URL: https://issues.apache.org/jira/browse/PIG-577
> Project: Pig
> Issue Type: Bug
> Affects Versions: types_branch
> Reporter: Olga Natkovich
> Fix For: types_branch
>
>
> The following query:
> A = LOAD 'student_data' AS (name: chararray, age: int, gpa: float);
> B = LOAD 'voter_data' AS (name: chararray, age: int, registration: chararray, contributions: float);
> C = COGROUP A BY name, B BY name;
> D = FOREACH C GENERATE group, flatten((IsEmpty(A) ? null : A)), flatten((IsEmpty(B) ? null : B));
> describe D;
> E = FOREACH D GENERATE A::gpa, B::contributions;
> Give the following error: (Even though describe shows correct information: D: {group: chararray,A::name: chararray,A::age: int,A::gpa: float,B::name: chararray,B::age: int,B::registration: chararray,B::contributions: float}
> java.io.IOException: Invalid alias: A::gpa in {group: chararray,bytearray,bytearray}
> at org.apache.pig.PigServer.parseQuery(PigServer.java:298)
> at org.apache.pig.PigServer.registerQuery(PigServer.java:263)
> at org.apache.pig.tools.grunt.GruntParser.processPig(GruntParser.java:439)
> at org.apache.pig.tools.pigscript.parser.PigScriptParser.parse(PigScriptParser.java:249)
> at org.apache.pig.tools.grunt.GruntParser.parseStopOnError(GruntParser.java:84)
> at org.apache.pig.tools.grunt.Grunt.exec(Grunt.java:64)
> at org.apache.pig.Main.main(Main.java:306)
> Caused by: org.apache.pig.impl.logicalLayer.parser.ParseException: Invalid alias: A::gpa in {group: chararray,bytearray,bytearray}
> at org.apache.pig.impl.logicalLayer.parser.QueryParser.AliasFieldOrSpec(QueryParser.java:5930)
> at org.apache.pig.impl.logicalLayer.parser.QueryParser.ColOrSpec(QueryParser.java:5788)
> at org.apache.pig.impl.logicalLayer.parser.QueryParser.BaseEvalSpec(QueryParser.java:3974)
> at org.apache.pig.impl.logicalLayer.parser.QueryParser.UnaryExpr(QueryParser.java:3871)
> at org.apache.pig.impl.logicalLayer.parser.QueryParser.CastExpr(QueryParser.java:3825)
> at org.apache.pig.impl.logicalLayer.parser.QueryParser.MultiplicativeExpr(QueryParser.java:3734)
> at org.apache.pig.impl.logicalLayer.parser.QueryParser.AdditiveExpr(QueryParser.java:3660)
> at org.apache.pig.impl.logicalLayer.parser.QueryParser.InfixExpr(QueryParser.java:3626)
> at org.apache.pig.impl.logicalLayer.parser.QueryParser.FlattenedGenerateItem(QueryParser.java:3552)
> at org.apache.pig.impl.logicalLayer.parser.QueryParser.FlattenedGenerateItemList(QueryParser.java:3462)
> at org.apache.pig.impl.logicalLayer.parser.QueryParser.GenerateStatement(QueryParser.java:3419)
> at org.apache.pig.impl.logicalLayer.parser.QueryParser.NestedBlock(QueryParser.java:2894)
> at org.apache.pig.impl.logicalLayer.parser.QueryParser.ForEachClause(QueryParser.java:2309)
> at org.apache.pig.impl.logicalLayer.parser.QueryParser.BaseExpr(QueryParser.java:966)
> at org.apache.pig.impl.logicalLayer.parser.QueryParser.Expr(QueryParser.java:742)
> at org.apache.pig.impl.logicalLayer.parser.QueryParser.Parse(QueryParser.java:537)
> at org.apache.pig.impl.logicalLayer.LogicalPlanBuilder.parse(LogicalPlanBuilder.java:60)
> at org.apache.pig.PigServer.parseQuery(PigServer.java:295)
> ... 6 more
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[jira] Commented: (PIG-577) outer join query looses name
information
Posted by "Santhosh Srinivasan (JIRA)" <ji...@apache.org>.
[ https://issues.apache.org/jira/browse/PIG-577?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12659152#action_12659152 ]
Santhosh Srinivasan commented on PIG-577:
-----------------------------------------
The use of the null constant in the bincond in the context of a flatten should handle the following cases:
Assumption: one of the columns in the bincond is a null constant.
1. If the other column is a simple type or a map then cast the null to the other type.
2. If the other column is a complex type other than a map then remove the null constant and supplant it with
a bag or a tuple or a map constant with the appropriate elements, i.e., if the other column
is a bag with a tuple that contains three columns (say int, float, chararray) then replace the
null constant with a bag that contains a tuple with three null constants. The same reasoning
applies to a tuple column.
Upon flattening the complex types will give out the appropriate number of columns.
Handling null constants for complex type has implications when the constant is materialized either
via dump or store. If the null constant is replaced with an appropriate bag/tuple/map then the materialized
constant will look like {(,,)} or (,,) or []. This conflicts with our existing view of nulls being empty when
materialized.
> outer join query looses name information
> ----------------------------------------
>
> Key: PIG-577
> URL: https://issues.apache.org/jira/browse/PIG-577
> Project: Pig
> Issue Type: Bug
> Affects Versions: types_branch
> Reporter: Olga Natkovich
> Fix For: types_branch
>
>
> The following query:
> A = LOAD 'student_data' AS (name: chararray, age: int, gpa: float);
> B = LOAD 'voter_data' AS (name: chararray, age: int, registration: chararray, contributions: float);
> C = COGROUP A BY name, B BY name;
> D = FOREACH C GENERATE group, flatten((IsEmpty(A) ? null : A)), flatten((IsEmpty(B) ? null : B));
> describe D;
> E = FOREACH D GENERATE A::gpa, B::contributions;
> Give the following error: (Even though describe shows correct information: D: {group: chararray,A::name: chararray,A::age: int,A::gpa: float,B::name: chararray,B::age: int,B::registration: chararray,B::contributions: float}
> java.io.IOException: Invalid alias: A::gpa in {group: chararray,bytearray,bytearray}
> at org.apache.pig.PigServer.parseQuery(PigServer.java:298)
> at org.apache.pig.PigServer.registerQuery(PigServer.java:263)
> at org.apache.pig.tools.grunt.GruntParser.processPig(GruntParser.java:439)
> at org.apache.pig.tools.pigscript.parser.PigScriptParser.parse(PigScriptParser.java:249)
> at org.apache.pig.tools.grunt.GruntParser.parseStopOnError(GruntParser.java:84)
> at org.apache.pig.tools.grunt.Grunt.exec(Grunt.java:64)
> at org.apache.pig.Main.main(Main.java:306)
> Caused by: org.apache.pig.impl.logicalLayer.parser.ParseException: Invalid alias: A::gpa in {group: chararray,bytearray,bytearray}
> at org.apache.pig.impl.logicalLayer.parser.QueryParser.AliasFieldOrSpec(QueryParser.java:5930)
> at org.apache.pig.impl.logicalLayer.parser.QueryParser.ColOrSpec(QueryParser.java:5788)
> at org.apache.pig.impl.logicalLayer.parser.QueryParser.BaseEvalSpec(QueryParser.java:3974)
> at org.apache.pig.impl.logicalLayer.parser.QueryParser.UnaryExpr(QueryParser.java:3871)
> at org.apache.pig.impl.logicalLayer.parser.QueryParser.CastExpr(QueryParser.java:3825)
> at org.apache.pig.impl.logicalLayer.parser.QueryParser.MultiplicativeExpr(QueryParser.java:3734)
> at org.apache.pig.impl.logicalLayer.parser.QueryParser.AdditiveExpr(QueryParser.java:3660)
> at org.apache.pig.impl.logicalLayer.parser.QueryParser.InfixExpr(QueryParser.java:3626)
> at org.apache.pig.impl.logicalLayer.parser.QueryParser.FlattenedGenerateItem(QueryParser.java:3552)
> at org.apache.pig.impl.logicalLayer.parser.QueryParser.FlattenedGenerateItemList(QueryParser.java:3462)
> at org.apache.pig.impl.logicalLayer.parser.QueryParser.GenerateStatement(QueryParser.java:3419)
> at org.apache.pig.impl.logicalLayer.parser.QueryParser.NestedBlock(QueryParser.java:2894)
> at org.apache.pig.impl.logicalLayer.parser.QueryParser.ForEachClause(QueryParser.java:2309)
> at org.apache.pig.impl.logicalLayer.parser.QueryParser.BaseExpr(QueryParser.java:966)
> at org.apache.pig.impl.logicalLayer.parser.QueryParser.Expr(QueryParser.java:742)
> at org.apache.pig.impl.logicalLayer.parser.QueryParser.Parse(QueryParser.java:537)
> at org.apache.pig.impl.logicalLayer.LogicalPlanBuilder.parse(LogicalPlanBuilder.java:60)
> at org.apache.pig.PigServer.parseQuery(PigServer.java:295)
> ... 6 more
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[jira] Commented: (PIG-577) outer join query looses name
information
Posted by "Santhosh Srinivasan (JIRA)" <ji...@apache.org>.
[ https://issues.apache.org/jira/browse/PIG-577?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12659016#action_12659016 ]
Santhosh Srinivasan commented on PIG-577:
-----------------------------------------
The workaround is to invert the condition of the bincond and swap the two elements of the bincond.
{code}
D = FOREACH C GENERATE group, flatten((not IsEmpty(A) ? A: null ), flatten((not IsEmpty(B) ? B: null ));
{code}
The root cause for this issue is the schema computation in LOBinCond. The assumption is that the schemas of the LHS and RHS of the bincond match all the time. The type checker ensures that this assumption is true. However, after each statement is parsed we do not run the type checker. The type checker is run only when describe, explain, dump or store is encountered.
As a result for the script reported in the bug, the type of the null constant is seen as bytearray and not as the schema of the RHS which is a bag.
The type checking logic should be invoked early by invoking the type checker after each statement or the type checking logic for bincond should be invoked by the getFieldSchema method to ensure the equivalence of the LHS and RHS schemas.
> outer join query looses name information
> ----------------------------------------
>
> Key: PIG-577
> URL: https://issues.apache.org/jira/browse/PIG-577
> Project: Pig
> Issue Type: Bug
> Affects Versions: types_branch
> Reporter: Olga Natkovich
> Fix For: types_branch
>
>
> The following query:
> A = LOAD 'student_data' AS (name: chararray, age: int, gpa: float);
> B = LOAD 'voter_data' AS (name: chararray, age: int, registration: chararray, contributions: float);
> C = COGROUP A BY name, B BY name;
> D = FOREACH C GENERATE group, flatten((IsEmpty(A) ? null : A)), flatten((IsEmpty(B) ? null : B));
> describe D;
> E = FOREACH D GENERATE A::gpa, B::contributions;
> Give the following error: (Even though describe shows correct information: D: {group: chararray,A::name: chararray,A::age: int,A::gpa: float,B::name: chararray,B::age: int,B::registration: chararray,B::contributions: float}
> java.io.IOException: Invalid alias: A::gpa in {group: chararray,bytearray,bytearray}
> at org.apache.pig.PigServer.parseQuery(PigServer.java:298)
> at org.apache.pig.PigServer.registerQuery(PigServer.java:263)
> at org.apache.pig.tools.grunt.GruntParser.processPig(GruntParser.java:439)
> at org.apache.pig.tools.pigscript.parser.PigScriptParser.parse(PigScriptParser.java:249)
> at org.apache.pig.tools.grunt.GruntParser.parseStopOnError(GruntParser.java:84)
> at org.apache.pig.tools.grunt.Grunt.exec(Grunt.java:64)
> at org.apache.pig.Main.main(Main.java:306)
> Caused by: org.apache.pig.impl.logicalLayer.parser.ParseException: Invalid alias: A::gpa in {group: chararray,bytearray,bytearray}
> at org.apache.pig.impl.logicalLayer.parser.QueryParser.AliasFieldOrSpec(QueryParser.java:5930)
> at org.apache.pig.impl.logicalLayer.parser.QueryParser.ColOrSpec(QueryParser.java:5788)
> at org.apache.pig.impl.logicalLayer.parser.QueryParser.BaseEvalSpec(QueryParser.java:3974)
> at org.apache.pig.impl.logicalLayer.parser.QueryParser.UnaryExpr(QueryParser.java:3871)
> at org.apache.pig.impl.logicalLayer.parser.QueryParser.CastExpr(QueryParser.java:3825)
> at org.apache.pig.impl.logicalLayer.parser.QueryParser.MultiplicativeExpr(QueryParser.java:3734)
> at org.apache.pig.impl.logicalLayer.parser.QueryParser.AdditiveExpr(QueryParser.java:3660)
> at org.apache.pig.impl.logicalLayer.parser.QueryParser.InfixExpr(QueryParser.java:3626)
> at org.apache.pig.impl.logicalLayer.parser.QueryParser.FlattenedGenerateItem(QueryParser.java:3552)
> at org.apache.pig.impl.logicalLayer.parser.QueryParser.FlattenedGenerateItemList(QueryParser.java:3462)
> at org.apache.pig.impl.logicalLayer.parser.QueryParser.GenerateStatement(QueryParser.java:3419)
> at org.apache.pig.impl.logicalLayer.parser.QueryParser.NestedBlock(QueryParser.java:2894)
> at org.apache.pig.impl.logicalLayer.parser.QueryParser.ForEachClause(QueryParser.java:2309)
> at org.apache.pig.impl.logicalLayer.parser.QueryParser.BaseExpr(QueryParser.java:966)
> at org.apache.pig.impl.logicalLayer.parser.QueryParser.Expr(QueryParser.java:742)
> at org.apache.pig.impl.logicalLayer.parser.QueryParser.Parse(QueryParser.java:537)
> at org.apache.pig.impl.logicalLayer.LogicalPlanBuilder.parse(LogicalPlanBuilder.java:60)
> at org.apache.pig.PigServer.parseQuery(PigServer.java:295)
> ... 6 more
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[jira] Resolved: (PIG-577) outer join query looses name information
Posted by "Pradeep Kamath (JIRA)" <ji...@apache.org>.
[ https://issues.apache.org/jira/browse/PIG-577?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Pradeep Kamath resolved PIG-577.
--------------------------------
Resolution: Fixed
> outer join query looses name information
> ----------------------------------------
>
> Key: PIG-577
> URL: https://issues.apache.org/jira/browse/PIG-577
> Project: Pig
> Issue Type: Bug
> Affects Versions: types_branch
> Reporter: Olga Natkovich
> Assignee: Santhosh Srinivasan
> Fix For: types_branch
>
> Attachments: PIG-577.patch
>
>
> The following query:
> A = LOAD 'student_data' AS (name: chararray, age: int, gpa: float);
> B = LOAD 'voter_data' AS (name: chararray, age: int, registration: chararray, contributions: float);
> C = COGROUP A BY name, B BY name;
> D = FOREACH C GENERATE group, flatten((IsEmpty(A) ? null : A)), flatten((IsEmpty(B) ? null : B));
> describe D;
> E = FOREACH D GENERATE A::gpa, B::contributions;
> Give the following error: (Even though describe shows correct information: D: {group: chararray,A::name: chararray,A::age: int,A::gpa: float,B::name: chararray,B::age: int,B::registration: chararray,B::contributions: float}
> java.io.IOException: Invalid alias: A::gpa in {group: chararray,bytearray,bytearray}
> at org.apache.pig.PigServer.parseQuery(PigServer.java:298)
> at org.apache.pig.PigServer.registerQuery(PigServer.java:263)
> at org.apache.pig.tools.grunt.GruntParser.processPig(GruntParser.java:439)
> at org.apache.pig.tools.pigscript.parser.PigScriptParser.parse(PigScriptParser.java:249)
> at org.apache.pig.tools.grunt.GruntParser.parseStopOnError(GruntParser.java:84)
> at org.apache.pig.tools.grunt.Grunt.exec(Grunt.java:64)
> at org.apache.pig.Main.main(Main.java:306)
> Caused by: org.apache.pig.impl.logicalLayer.parser.ParseException: Invalid alias: A::gpa in {group: chararray,bytearray,bytearray}
> at org.apache.pig.impl.logicalLayer.parser.QueryParser.AliasFieldOrSpec(QueryParser.java:5930)
> at org.apache.pig.impl.logicalLayer.parser.QueryParser.ColOrSpec(QueryParser.java:5788)
> at org.apache.pig.impl.logicalLayer.parser.QueryParser.BaseEvalSpec(QueryParser.java:3974)
> at org.apache.pig.impl.logicalLayer.parser.QueryParser.UnaryExpr(QueryParser.java:3871)
> at org.apache.pig.impl.logicalLayer.parser.QueryParser.CastExpr(QueryParser.java:3825)
> at org.apache.pig.impl.logicalLayer.parser.QueryParser.MultiplicativeExpr(QueryParser.java:3734)
> at org.apache.pig.impl.logicalLayer.parser.QueryParser.AdditiveExpr(QueryParser.java:3660)
> at org.apache.pig.impl.logicalLayer.parser.QueryParser.InfixExpr(QueryParser.java:3626)
> at org.apache.pig.impl.logicalLayer.parser.QueryParser.FlattenedGenerateItem(QueryParser.java:3552)
> at org.apache.pig.impl.logicalLayer.parser.QueryParser.FlattenedGenerateItemList(QueryParser.java:3462)
> at org.apache.pig.impl.logicalLayer.parser.QueryParser.GenerateStatement(QueryParser.java:3419)
> at org.apache.pig.impl.logicalLayer.parser.QueryParser.NestedBlock(QueryParser.java:2894)
> at org.apache.pig.impl.logicalLayer.parser.QueryParser.ForEachClause(QueryParser.java:2309)
> at org.apache.pig.impl.logicalLayer.parser.QueryParser.BaseExpr(QueryParser.java:966)
> at org.apache.pig.impl.logicalLayer.parser.QueryParser.Expr(QueryParser.java:742)
> at org.apache.pig.impl.logicalLayer.parser.QueryParser.Parse(QueryParser.java:537)
> at org.apache.pig.impl.logicalLayer.LogicalPlanBuilder.parse(LogicalPlanBuilder.java:60)
> at org.apache.pig.PigServer.parseQuery(PigServer.java:295)
> ... 6 more
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[jira] Updated: (PIG-577) outer join query looses name information
Posted by "Santhosh Srinivasan (JIRA)" <ji...@apache.org>.
[ https://issues.apache.org/jira/browse/PIG-577?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Santhosh Srinivasan updated PIG-577:
------------------------------------
Patch Info: [Patch Available]
> outer join query looses name information
> ----------------------------------------
>
> Key: PIG-577
> URL: https://issues.apache.org/jira/browse/PIG-577
> Project: Pig
> Issue Type: Bug
> Affects Versions: types_branch
> Reporter: Olga Natkovich
> Assignee: Santhosh Srinivasan
> Fix For: types_branch
>
> Attachments: PIG-577.patch
>
>
> The following query:
> A = LOAD 'student_data' AS (name: chararray, age: int, gpa: float);
> B = LOAD 'voter_data' AS (name: chararray, age: int, registration: chararray, contributions: float);
> C = COGROUP A BY name, B BY name;
> D = FOREACH C GENERATE group, flatten((IsEmpty(A) ? null : A)), flatten((IsEmpty(B) ? null : B));
> describe D;
> E = FOREACH D GENERATE A::gpa, B::contributions;
> Give the following error: (Even though describe shows correct information: D: {group: chararray,A::name: chararray,A::age: int,A::gpa: float,B::name: chararray,B::age: int,B::registration: chararray,B::contributions: float}
> java.io.IOException: Invalid alias: A::gpa in {group: chararray,bytearray,bytearray}
> at org.apache.pig.PigServer.parseQuery(PigServer.java:298)
> at org.apache.pig.PigServer.registerQuery(PigServer.java:263)
> at org.apache.pig.tools.grunt.GruntParser.processPig(GruntParser.java:439)
> at org.apache.pig.tools.pigscript.parser.PigScriptParser.parse(PigScriptParser.java:249)
> at org.apache.pig.tools.grunt.GruntParser.parseStopOnError(GruntParser.java:84)
> at org.apache.pig.tools.grunt.Grunt.exec(Grunt.java:64)
> at org.apache.pig.Main.main(Main.java:306)
> Caused by: org.apache.pig.impl.logicalLayer.parser.ParseException: Invalid alias: A::gpa in {group: chararray,bytearray,bytearray}
> at org.apache.pig.impl.logicalLayer.parser.QueryParser.AliasFieldOrSpec(QueryParser.java:5930)
> at org.apache.pig.impl.logicalLayer.parser.QueryParser.ColOrSpec(QueryParser.java:5788)
> at org.apache.pig.impl.logicalLayer.parser.QueryParser.BaseEvalSpec(QueryParser.java:3974)
> at org.apache.pig.impl.logicalLayer.parser.QueryParser.UnaryExpr(QueryParser.java:3871)
> at org.apache.pig.impl.logicalLayer.parser.QueryParser.CastExpr(QueryParser.java:3825)
> at org.apache.pig.impl.logicalLayer.parser.QueryParser.MultiplicativeExpr(QueryParser.java:3734)
> at org.apache.pig.impl.logicalLayer.parser.QueryParser.AdditiveExpr(QueryParser.java:3660)
> at org.apache.pig.impl.logicalLayer.parser.QueryParser.InfixExpr(QueryParser.java:3626)
> at org.apache.pig.impl.logicalLayer.parser.QueryParser.FlattenedGenerateItem(QueryParser.java:3552)
> at org.apache.pig.impl.logicalLayer.parser.QueryParser.FlattenedGenerateItemList(QueryParser.java:3462)
> at org.apache.pig.impl.logicalLayer.parser.QueryParser.GenerateStatement(QueryParser.java:3419)
> at org.apache.pig.impl.logicalLayer.parser.QueryParser.NestedBlock(QueryParser.java:2894)
> at org.apache.pig.impl.logicalLayer.parser.QueryParser.ForEachClause(QueryParser.java:2309)
> at org.apache.pig.impl.logicalLayer.parser.QueryParser.BaseExpr(QueryParser.java:966)
> at org.apache.pig.impl.logicalLayer.parser.QueryParser.Expr(QueryParser.java:742)
> at org.apache.pig.impl.logicalLayer.parser.QueryParser.Parse(QueryParser.java:537)
> at org.apache.pig.impl.logicalLayer.LogicalPlanBuilder.parse(LogicalPlanBuilder.java:60)
> at org.apache.pig.PigServer.parseQuery(PigServer.java:295)
> ... 6 more
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[jira] Updated: (PIG-577) outer join query looses name information
Posted by "Pradeep Kamath (JIRA)" <ji...@apache.org>.
[ https://issues.apache.org/jira/browse/PIG-577?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Pradeep Kamath updated PIG-577:
-------------------------------
Hadoop Flags: [Reviewed]
+1, Patch committed - thanks for the fix Santhosh.
> outer join query looses name information
> ----------------------------------------
>
> Key: PIG-577
> URL: https://issues.apache.org/jira/browse/PIG-577
> Project: Pig
> Issue Type: Bug
> Affects Versions: types_branch
> Reporter: Olga Natkovich
> Assignee: Santhosh Srinivasan
> Fix For: types_branch
>
> Attachments: PIG-577.patch
>
>
> The following query:
> A = LOAD 'student_data' AS (name: chararray, age: int, gpa: float);
> B = LOAD 'voter_data' AS (name: chararray, age: int, registration: chararray, contributions: float);
> C = COGROUP A BY name, B BY name;
> D = FOREACH C GENERATE group, flatten((IsEmpty(A) ? null : A)), flatten((IsEmpty(B) ? null : B));
> describe D;
> E = FOREACH D GENERATE A::gpa, B::contributions;
> Give the following error: (Even though describe shows correct information: D: {group: chararray,A::name: chararray,A::age: int,A::gpa: float,B::name: chararray,B::age: int,B::registration: chararray,B::contributions: float}
> java.io.IOException: Invalid alias: A::gpa in {group: chararray,bytearray,bytearray}
> at org.apache.pig.PigServer.parseQuery(PigServer.java:298)
> at org.apache.pig.PigServer.registerQuery(PigServer.java:263)
> at org.apache.pig.tools.grunt.GruntParser.processPig(GruntParser.java:439)
> at org.apache.pig.tools.pigscript.parser.PigScriptParser.parse(PigScriptParser.java:249)
> at org.apache.pig.tools.grunt.GruntParser.parseStopOnError(GruntParser.java:84)
> at org.apache.pig.tools.grunt.Grunt.exec(Grunt.java:64)
> at org.apache.pig.Main.main(Main.java:306)
> Caused by: org.apache.pig.impl.logicalLayer.parser.ParseException: Invalid alias: A::gpa in {group: chararray,bytearray,bytearray}
> at org.apache.pig.impl.logicalLayer.parser.QueryParser.AliasFieldOrSpec(QueryParser.java:5930)
> at org.apache.pig.impl.logicalLayer.parser.QueryParser.ColOrSpec(QueryParser.java:5788)
> at org.apache.pig.impl.logicalLayer.parser.QueryParser.BaseEvalSpec(QueryParser.java:3974)
> at org.apache.pig.impl.logicalLayer.parser.QueryParser.UnaryExpr(QueryParser.java:3871)
> at org.apache.pig.impl.logicalLayer.parser.QueryParser.CastExpr(QueryParser.java:3825)
> at org.apache.pig.impl.logicalLayer.parser.QueryParser.MultiplicativeExpr(QueryParser.java:3734)
> at org.apache.pig.impl.logicalLayer.parser.QueryParser.AdditiveExpr(QueryParser.java:3660)
> at org.apache.pig.impl.logicalLayer.parser.QueryParser.InfixExpr(QueryParser.java:3626)
> at org.apache.pig.impl.logicalLayer.parser.QueryParser.FlattenedGenerateItem(QueryParser.java:3552)
> at org.apache.pig.impl.logicalLayer.parser.QueryParser.FlattenedGenerateItemList(QueryParser.java:3462)
> at org.apache.pig.impl.logicalLayer.parser.QueryParser.GenerateStatement(QueryParser.java:3419)
> at org.apache.pig.impl.logicalLayer.parser.QueryParser.NestedBlock(QueryParser.java:2894)
> at org.apache.pig.impl.logicalLayer.parser.QueryParser.ForEachClause(QueryParser.java:2309)
> at org.apache.pig.impl.logicalLayer.parser.QueryParser.BaseExpr(QueryParser.java:966)
> at org.apache.pig.impl.logicalLayer.parser.QueryParser.Expr(QueryParser.java:742)
> at org.apache.pig.impl.logicalLayer.parser.QueryParser.Parse(QueryParser.java:537)
> at org.apache.pig.impl.logicalLayer.LogicalPlanBuilder.parse(LogicalPlanBuilder.java:60)
> at org.apache.pig.PigServer.parseQuery(PigServer.java:295)
> ... 6 more
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