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https://issues.apache.org/jira/browse/PHOENIX-3648?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15850731#comment-15850731
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James Taylor commented on PHOENIX-3648:
---------------------------------------
Can we pass in the column family of {{sourceColumnRef}} instead of
{{TupleProjector.VALUE_COLUMN_FAMILY}}? You can get that through
{{sourceColumnRef.getColumn().getFamilyName().getString()}} (but you need a
null check for the family name).
> Self Join on table with columns of the same name and different column
> families fails
> ------------------------------------------------------------------------------------
>
> Key: PHOENIX-3648
> URL: https://issues.apache.org/jira/browse/PHOENIX-3648
> Project: Phoenix
> Issue Type: Bug
> Reporter: Thomas D'Silva
> Assignee: Thomas D'Silva
>
> The following test fails when running the second join query.
> {code}
> @Test
> public void testSelfJoin() throws Exception {
> try (Connection conn = DriverManager.getConnection(getUrl())) {
> conn.createStatement().execute("create table t1 (varchar_pk
> VARCHAR NOT NULL primary key, a.varchar_col1 VARCHAR, b.varchar_col2
> VARCHAR)");
> conn.createStatement().execute("create table t2 (varchar_pk
> VARCHAR NOT NULL primary key, a.varchar_col1 VARCHAR, b.varchar_col1
> VARCHAR)");
> // verify no rows returned
> ResultSet rs = conn.createStatement().executeQuery("SELECT * FROM
> t1 x JOIN t1 y ON (x.varchar_pk = y.a.varchar_col1)");
> assertFalse(rs.next());
> rs = conn.createStatement().executeQuery("SELECT * FROM t2 x JOIN
> t2 y ON (x.varchar_pk = y.a.varchar_col1)");
> assertFalse(rs.next());
> }
> }
> {code}
> {code}
> org.apache.phoenix.schema.ColumnAlreadyExistsException: ERROR 514 (42892): A
> duplicate column name was detected in the object definition or ALTER TABLE
> statement. columnName=..T2.X.VARCHAR_COL1
> at org.apache.phoenix.schema.PTableImpl.init(PTableImpl.java:467)
> at org.apache.phoenix.schema.PTableImpl.<init>(PTableImpl.java:365)
> at org.apache.phoenix.schema.PTableImpl.makePTable(PTableImpl.java:335)
> at
> org.apache.phoenix.compile.TupleProjectionCompiler.createProjectedTable(TupleProjectionCompiler.java:179)
> at
> org.apache.phoenix.compile.JoinCompiler$Table.createProjectedTable(JoinCompiler.java:751)
> at
> org.apache.phoenix.compile.QueryCompiler.compileJoinQuery(QueryCompiler.java:267)
> at
> org.apache.phoenix.compile.QueryCompiler.compileSelect(QueryCompiler.java:200)
> at
> org.apache.phoenix.compile.QueryCompiler.compile(QueryCompiler.java:157)
> at
> org.apache.phoenix.jdbc.PhoenixStatement$ExecutableSelectStatement.compilePlan(PhoenixStatement.java:417)
> at
> org.apache.phoenix.jdbc.PhoenixStatement$ExecutableSelectStatement.compilePlan(PhoenixStatement.java:391)
> at
> org.apache.phoenix.jdbc.PhoenixStatement$1.call(PhoenixStatement.java:277)
> at
> org.apache.phoenix.jdbc.PhoenixStatement$1.call(PhoenixStatement.java:267)
> at org.apache.phoenix.call.CallRunner.run(CallRunner.java:53)
> at
> org.apache.phoenix.jdbc.PhoenixStatement.executeQuery(PhoenixStatement.java:266)
> at
> org.apache.phoenix.jdbc.PhoenixStatement.executeQuery(PhoenixStatement.java:1427)
> at
> org.apache.phoenix.end2end.index.IndexExpressionIT.testSelfJoin(IndexExpressionIT.java:1554)
> 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.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:50)
> at
> org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12)
> at
> org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:47)
> at
> org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:17)
> at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:325)
> at
> org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:78)
> at
> org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:57)
> at org.junit.runners.ParentRunner$3.run(ParentRunner.java:290)
> at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:71)
> at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:288)
> at org.junit.runners.ParentRunner.access$000(ParentRunner.java:58)
> at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:268)
> at
> org.junit.internal.runners.statements.RunBefores.evaluate(RunBefores.java:26)
> at org.junit.rules.ExternalResource$1.evaluate(ExternalResource.java:48)
> at org.junit.rules.RunRules.evaluate(RunRules.java:20)
> at org.junit.runners.ParentRunner.run(ParentRunner.java:363)
> at
> org.eclipse.jdt.internal.junit4.runner.JUnit4TestReference.run(JUnit4TestReference.java:50)
> at
> org.eclipse.jdt.internal.junit.runner.TestExecution.run(TestExecution.java:38)
> at
> org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:459)
> at
> org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:675)
> at
> org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:382)
> at
> org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:192)
> {code}
> It fails because in TupleProjectionCompiler.createProjectedTable when we
> create the projected columns we set the column family name to
> TupleProjector.VALUE_COLUMN_FAMILY
> [~maryannxue], [~jamestaylor] Do you have any suggestions on how to fix this?
> {code}
> for (int i = position; i < sourceColumnRefs.size(); i++) {
> ColumnRef sourceColumnRef = sourceColumnRefs.get(i);
> PColumn sourceColumn = sourceColumnRef.getColumn();
> String colName = sourceColumn.getName().getString();
> String aliasedName = tableRef.getTableAlias() == null ?
> SchemaUtil.getColumnName(table.getName().getString(),
> colName)
> : SchemaUtil.getColumnName(tableRef.getTableAlias(),
> colName);
> PColumn column = new
> ProjectedColumn(PNameFactory.newName(aliasedName),
> retainPKColumns && SchemaUtil.isPKColumn(sourceColumn) ?
> null :
> PNameFactory.newName(TupleProjector.VALUE_COLUMN_FAMILY),
> position++, sourceColumn.isNullable(), sourceColumnRef);
> projectedColumns.add(column);
> }
> {code}
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