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https://issues.apache.org/jira/browse/CALCITE-980?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15029651#comment-15029651
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Vladimir Sitnikov commented on CALCITE-980:
-------------------------------------------
I'll check if I could get familiar with Quidem.
I think the next step would be exhaustive testing of "nullable vs non-nullable
combinations".
I'm still not sure if "inferred return types" are right.
`foldOr` / `foldAnd` return non-boxed primitives, while fallback and/or return
boxed (to return null somehow).
> Not (C='a' or C='b') as well as Not (C='a' and C='b') causes NPE
> ----------------------------------------------------------------
>
> Key: CALCITE-980
> URL: https://issues.apache.org/jira/browse/CALCITE-980
> Project: Calcite
> Issue Type: Bug
> Affects Versions: 1.4.0-incubating
> Reporter: liyang
> Assignee: Julian Hyde
>
> A where clause like Not (C='a' or C='b') causes NPE if C has NULL value.
> The generated code snippet looks like:
> {code}
> /* 65 */ public boolean moveNext() {
> /* 66 */ while (inputEnumerator.moveNext()) {
> /* 67 */ final Object[] current = (Object[])
> inputEnumerator.current();
> /* 68 */ final String inp21_ = current[21] == null ? (String)
> null : current[21].toString();
> /* 69 */ final Boolean v = inp21_ == null ? (Boolean) null :
> Boolean.valueOf(org.apache.calcite.runtime.SqlFunctions.eq(inp21_, "A"));
> /* 70 */ final Boolean v0 = inp21_ == null ? (Boolean) null :
> Boolean.valueOf(org.apache.calcite.runtime.SqlFunctions.eq(inp21_, "B"));
> /* 71 */ if (!(v == null ? (v0 == null || !v0 ? (Boolean) null
> : Boolean.TRUE) : v ? Boolean.TRUE : v0)) {
> /* 72 */ return true;
> /* 73 */ }
> /* 74 */ }
> /* 75 */ return false;
> /* 76 */ }
> {code}
> And NPE is thrown at line #71 if inp21_ is null.
> Stacktrace:
> {code}
> Caused by: java.lang.NullPointerException
> at Baz$1$1.moveNext(ANONYMOUS.java:71)
> at
> org.apache.calcite.linq4j.EnumerableDefaults.groupBy_(EnumerableDefaults.java:737)
> at
> org.apache.calcite.linq4j.EnumerableDefaults.groupBy(EnumerableDefaults.java:677)
> at
> org.apache.calcite.linq4j.DefaultEnumerable.groupBy(DefaultEnumerable.java:301)
> at Baz.bind(Baz.java:95)
> at
> org.apache.calcite.jdbc.CalcitePrepare$CalciteSignature.enumerable(CalcitePrepare.java:281)
> at
> org.apache.calcite.jdbc.CalciteConnectionImpl.enumerable(CalciteConnectionImpl.java:235)
> at
> org.apache.calcite.jdbc.CalciteMetaImpl.createIterable(CalciteMetaImpl.java:533)
> at
> org.apache.calcite.avatica.AvaticaResultSet.execute(AvaticaResultSet.java:184)
> at
> org.apache.calcite.jdbc.CalciteResultSet.execute(CalciteResultSet.java:63)
> at
> org.apache.calcite.jdbc.CalciteResultSet.execute(CalciteResultSet.java:42)
> at
> org.apache.calcite.avatica.AvaticaConnection$1.execute(AvaticaConnection.java:473)
> at
> org.apache.calcite.jdbc.CalciteMetaImpl.prepareAndExecute(CalciteMetaImpl.java:566)
> at
> org.apache.calcite.avatica.AvaticaConnection.prepareAndExecuteInternal(AvaticaConnection.java:477)
> at
> org.apache.calcite.avatica.AvaticaStatement.executeInternal(AvaticaStatement.java:109)
> ... 29 more
> {code}
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