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https://issues.apache.org/jira/browse/CALCITE-2152?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16344364#comment-16344364
]
Julian Hyde commented on CALCITE-2152:
--------------------------------------
You are hitting a known limitation to the parser, see CALCITE-35. We would like
to fix this, but it has proven hard.
A workaround might be to generate "(SELECT FROM x JOIN y ON ...) AS xy" rather
than "(x JOIN y ON ...)". The effect is slightly different, because in the
former the columns all belong to one table alias "xy", and in the latter they
belong to two aliases "x" and "y".
> SQL parser unable to parse SQL with nested joins produced by RelToSqlConverter
> ------------------------------------------------------------------------------
>
> Key: CALCITE-2152
> URL: https://issues.apache.org/jira/browse/CALCITE-2152
> Project: Calcite
> Issue Type: Bug
> Reporter: Samuel Waggoner
> Assignee: Julian Hyde
> Priority: Major
>
> I created this test case in RelToSqlConverterTest:
> {code:java}
> @Test
> public void testNestedJoin() {
> final String query = "select *"
> + "from \"sales_fact_1997\" "
> + "inner join (select * from \"customer\""
> + "inner join \"employee\" on (\"customer\".\"city\" =
> \"employee\".\"store_id\") ) AS \"customer_employee\""
> + "on (\"sales_fact_1997\".\"store_id\" = \"customer_employee\".\"city\")";
> String result = sql(query).exec();
> System.out.println(result);
> sql(result).exec();
> }
> {code}
> result looks like this:
> {code:java}
> SELECT *
> FROM "foodmart"."sales_fact_1997"
> INNER JOIN ("foodmart"."customer"
> INNER JOIN "foodmart"."employee" ON "customer"."city" =
> "employee"."store_id") ON "sales_fact_1997"."store_id" =
> "customer"."city"{code}
>
> The resulting stack trace:
>
> {code:java}
> java.lang.RuntimeException: org.apache.calcite.sql.parser.SqlParseException:
> Non-query expression encountered in illegal context
> at
> org.apache.calcite.rel.rel2sql.RelToSqlConverterTest$Sql.exec(RelToSqlConverterTest.java:2420)
> at
> org.apache.calcite.rel.rel2sql.RelToSqlConverterTest.testNestedJoin(RelToSqlConverterTest.java:2314)
> 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:498)
> 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$2.evaluate(ParentRunner.java:268)
> at org.junit.runners.ParentRunner.run(ParentRunner.java:363)
> at org.junit.runner.JUnitCore.run(JUnitCore.java:137)
> at
> com.intellij.junit4.JUnit4IdeaTestRunner.startRunnerWithArgs(JUnit4IdeaTestRunner.java:68)
> at
> com.intellij.rt.execution.junit.IdeaTestRunner$Repeater.startRunnerWithArgs(IdeaTestRunner.java:47)
> at
> com.intellij.rt.execution.junit.JUnitStarter.prepareStreamsAndStart(JUnitStarter.java:242)
> at com.intellij.rt.execution.junit.JUnitStarter.main(JUnitStarter.java:70)
> Caused by: org.apache.calcite.sql.parser.SqlParseException: Non-query
> expression encountered in illegal context
> at
> org.apache.calcite.sql.parser.impl.SqlParserImpl.convertException(SqlParserImpl.java:350)
> at
> org.apache.calcite.sql.parser.impl.SqlParserImpl.normalizeException(SqlParserImpl.java:131)
> at org.apache.calcite.sql.parser.SqlParser.parseQuery(SqlParser.java:138)
> at org.apache.calcite.sql.parser.SqlParser.parseStmt(SqlParser.java:163)
> at org.apache.calcite.prepare.PlannerImpl.parse(PlannerImpl.java:179)
> at
> org.apache.calcite.rel.rel2sql.RelToSqlConverterTest$Sql.exec(RelToSqlConverterTest.java:2407)
> ... 23 more
> Caused by: org.apache.calcite.runtime.CalciteException: Non-query expression
> encountered in illegal context
> at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
> at
> sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62)
> at
> sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
> at java.lang.reflect.Constructor.newInstance(Constructor.java:423)
> at
> org.apache.calcite.runtime.Resources$ExInstWithCause.ex(Resources.java:463)
> at org.apache.calcite.runtime.Resources$ExInst.ex(Resources.java:572)
> at org.apache.calcite.sql.SqlUtil.newContextException(SqlUtil.java:803)
> at org.apache.calcite.sql.SqlUtil.newContextException(SqlUtil.java:788)
> at
> org.apache.calcite.sql.parser.impl.SqlParserImpl.checkNonQueryExpression(SqlParserImpl.java:294)
> at
> org.apache.calcite.sql.parser.impl.SqlParserImpl.Expression3(SqlParserImpl.java:3323)
> at
> org.apache.calcite.sql.parser.impl.SqlParserImpl.Expression2b(SqlParserImpl.java:3069)
> at
> org.apache.calcite.sql.parser.impl.SqlParserImpl.Expression2(SqlParserImpl.java:3095)
> at
> org.apache.calcite.sql.parser.impl.SqlParserImpl.Expression(SqlParserImpl.java:3048)
> at
> org.apache.calcite.sql.parser.impl.SqlParserImpl.LeafQueryOrExpr(SqlParserImpl.java:3030)
> at
> org.apache.calcite.sql.parser.impl.SqlParserImpl.QueryOrExpr(SqlParserImpl.java:2952)
> at
> org.apache.calcite.sql.parser.impl.SqlParserImpl.OrderedQueryOrExpr(SqlParserImpl.java:466)
> at
> org.apache.calcite.sql.parser.impl.SqlParserImpl.ParenthesizedExpression(SqlParserImpl.java:586)
> at
> org.apache.calcite.sql.parser.impl.SqlParserImpl.TableRef2(SqlParserImpl.java:1812)
> at
> org.apache.calcite.sql.parser.impl.SqlParserImpl.TableRef(SqlParserImpl.java:1756)
> at
> org.apache.calcite.sql.parser.impl.SqlParserImpl.FromClause(SqlParserImpl.java:1668)
> at
> org.apache.calcite.sql.parser.impl.SqlParserImpl.SqlSelect(SqlParserImpl.java:918)
> at
> org.apache.calcite.sql.parser.impl.SqlParserImpl.LeafQuery(SqlParserImpl.java:555)
> at
> org.apache.calcite.sql.parser.impl.SqlParserImpl.LeafQueryOrExpr(SqlParserImpl.java:3033)
> at
> org.apache.calcite.sql.parser.impl.SqlParserImpl.QueryOrExpr(SqlParserImpl.java:2952)
> at
> org.apache.calcite.sql.parser.impl.SqlParserImpl.OrderedQueryOrExpr(SqlParserImpl.java:466)
> at
> org.apache.calcite.sql.parser.impl.SqlParserImpl.SqlStmt(SqlParserImpl.java:844)
> at
> org.apache.calcite.sql.parser.impl.SqlParserImpl.SqlStmtEof(SqlParserImpl.java:872)
> at
> org.apache.calcite.sql.parser.impl.SqlParserImpl.parseSqlStmtEof(SqlParserImpl.java:187)
> at org.apache.calcite.sql.parser.SqlParser.parseQuery(SqlParser.java:131)
> ... 26 more
> {code}
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