Browse through Jira, looks like it has been raised in https://issues.apache.org/jira/browse/CALCITE-458
On Wed, Jan 21, 2015 at 1:37 AM, Julian Hyde <[email protected]> wrote: > Yes, this case should work. Can you log a jira case for this? > > Regarding column ordinals: the intent of the API is that filter is applied > before the project, so the filter should be in terms of the column ordinals > in the table, not the column ordinals output by the project. It makes sense > to filter first, so that the project has fewer rows to deal with. Of course > some implementations might filter and project simultaneously. > > Julian > > > > On Jan 19, 2015, at 11:33 PM, Chin Wei Low <[email protected]> wrote: > > > > Thanks. > > > > Basically, my requirements are: > > 1. pushdown projection > > 2. pushdown filters that are supported by the underlying data source, and > > leave the unsupported one to Calcite. > > > > I found that I should be able to achieve that with > > ProjectableFilterableTable. > > But, there is issue using this interface. > > It throw exception with the projection column plus filter. For example, I > > change one of the query of the ScannableTableTest to filter by column k. > > This will not pushdown the filter, so Calcite will handle it. > > > > java.sql.SQLException: error while executing SQL "select "i","k" from > > "s"."beatles" where "k" = 1940": 2 > > at org.apache.calcite.avatica.Helper.createException(Helper.java:39) > > at > > > org.apache.calcite.avatica.AvaticaStatement.executeQuery(AvaticaStatement.java:119) > > at > > > org.apache.calcite.test.ScannableTableTest.testProjectableFilterable2WithProject(ScannableTableTest.java:193) > > at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) > > at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source) > > at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source) > > at java.lang.reflect.Method.invoke(Unknown Source) > > at > > > org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:47) > > at > > > org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12) > > at > > > org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:44) > > at > > > org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:17) > > at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:271) > > at > > > org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:70) > > at > > > org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:50) > > at org.junit.runners.ParentRunner$3.run(ParentRunner.java:238) > > at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:63) > > at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:236) > > at org.junit.runners.ParentRunner.access$000(ParentRunner.java:53) > > at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:229) > > at org.junit.runners.ParentRunner.run(ParentRunner.java:309) > > 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:467) > > at > > > org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:683) > > at > > > org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:390) > > at > > > org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:197) > > Caused by: java.lang.ArrayIndexOutOfBoundsException: 2 > > at > > > org.apache.calcite.interpreter.Interpreter$3.execute(Interpreter.java:193) > > at > org.apache.calcite.interpreter.Interpreter$2$1.get(Interpreter.java:177) > > at > > > org.apache.calcite.interpreter.Interpreter$2.execute(Interpreter.java:130) > > at org.apache.calcite.interpreter.FilterNode.run(FilterNode.java:42) > > at org.apache.calcite.interpreter.Interpreter.start(Interpreter.java:97) > > at > > > org.apache.calcite.interpreter.Interpreter.enumerator(Interpreter.java:64) > > at > > > org.apache.calcite.linq4j.AbstractEnumerable.iterator(AbstractEnumerable.java:33) > > at org.apache.calcite.avatica.MetaImpl.createCursor(MetaImpl.java:74) > > at > > > org.apache.calcite.avatica.AvaticaResultSet.execute(AvaticaResultSet.java:182) > > at > > > org.apache.calcite.jdbc.CalciteResultSet.execute(CalciteResultSet.java:62) > > at > org.apache.calcite.jdbc.CalciteResultSet.execute(CalciteResultSet.java:1) > > at > > > org.apache.calcite.avatica.AvaticaConnection$1.execute(AvaticaConnection.java:461) > > at > > > org.apache.calcite.jdbc.CalciteMetaImpl.prepareAndExecute(CalciteMetaImpl.java:475) > > at > > > org.apache.calcite.avatica.AvaticaConnection.prepareAndExecuteInternal(AvaticaConnection.java:434) > > at > > > org.apache.calcite.avatica.AvaticaStatement.executeQuery(AvaticaStatement.java:117) > > ... 24 more > > > > From the console: > > Interpreter: rewrite > > > rel#75:EnumerableCalc.ENUMERABLE.[](input=rel#0:EnumerableTableScan.ENUMERABLE.[](table=[s, > > beatles]),expr#0..2={inputs},expr#3=1940,expr#4==($t2, > > $t3),$f0=$t0,$f1=$t2,$condition=$t4) to LogicalProject#78 > > Interpreter: rewrite LogicalProject#78 to LogicalFilter#80 > > > > The filter/condition is [=($2, 1940)] > > > > I think the index of the condition/filter's column does not map to the > > projected columns index. For this case the index of column 'K' after > > projection should be 1 instead of 2. > > > > Regards, > > Chin Wei > > > > On Fri, Jan 16, 2015 at 4:36 PM, Julian Hyde <[email protected]> > wrote: > > > >> IIRC, bind variables are accessible via DataContext.get("$0"), or some > >> similar variable name. Take a look at the contents of the > >> DataContextImpl.map field in a debugger. In generated java code, > >> DataContext is available as a field called "root". > >> > >> Julian > >> > >> > >>> On Jan 16, 2015, at 12:31 AM, Chin Wei Low <[email protected]> > wrote: > >>> > >>> Hi, > >>> > >>> I am implementing a calcite adapter, and created a rule to pushdown > >> filter. > >>> When I execute a prepared statement, I can see the condition contains a > >>> RexDynamicParam with value "?0" in the LogicalFilter. > >>> How can I get the value of the bind variable, so I can push it down to > >> the > >>> underlying data source. > >>> > >>> Regards, > >>> Chin Wei > >> > >> > >
