[ https://issues.apache.org/jira/browse/CALCITE-2688?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Zoltan Haindrich resolved CALCITE-2688. --------------------------------------- Resolution: Fixed Fix Version/s: 1.18.0 [~julianhyde]: This change seem to have landed with a [commit message referencing CALCITE-2720 instead of this ticket |https://github.com/apache/calcite/commit/e80934465cee318fd306159489ee3e5c768dcb68] ...but its there! :) > Improve diagnosability when return type could not be inferred. > -------------------------------------------------------------- > > Key: CALCITE-2688 > URL: https://issues.apache.org/jira/browse/CALCITE-2688 > Project: Calcite > Issue Type: Improvement > Reporter: Zoltan Haindrich > Assignee: Zoltan Haindrich > Priority: Major > Fix For: 1.18.0 > > > Currently when the return type inferenence fails; a {{null}} is returned; > while leads to an NPE very quickly - the resulting Exception is not > informative at all. > {code} > @Test(expected = IllegalArgumentException.class) > public void checkNoCommonReturnTypeException() { > coalesce(vVarchar(1), vInt(2)); > } > {code} > example NPE: > {code} > java.lang.NullPointerException > at java.util.Objects.requireNonNull(Objects.java:203) > at org.apache.calcite.rex.RexCall.<init>(RexCall.java:59) > at org.apache.calcite.rex.RexBuilder.makeCall(RexBuilder.java:242) > at org.apache.calcite.rex.RexBuilder.makeCall(RexBuilder.java:254) > at > org.apache.calcite.test.RexProgramBuilderBase.coalesce(RexProgramBuilderBase.java:300) > at > org.apache.calcite.test.RexProgramTest.checkNoCommonReturnTypeException(RexProgramTest.java:753) > at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) > {code} -- This message was sent by Atlassian JIRA (v7.6.3#76005)