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https://issues.apache.org/jira/browse/CALCITE-4495?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17283478#comment-17283478
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Julian Hyde commented on CALCITE-4495:
--------------------------------------
[~swtalbot], It looks as if {{RexLiteral.valueMatchesType}} returns {{false}}
just before the precondition fails. Can you tell me what are {{value}} and
{{typeName}} that causes that to happen?
> Sarg simplification with IS_NULL and unknown type throws
> IllegalArgumentException
> ---------------------------------------------------------------------------------
>
> Key: CALCITE-4495
> URL: https://issues.apache.org/jira/browse/CALCITE-4495
> Project: Calcite
> Issue Type: Bug
> Reporter: Steven Talbot
> Priority: Major
> Fix For: 1.27.0
>
>
> Apologies. After spending an hour or so trying to write a simple repro for
> this I was unable to, so filing a bug for now so I have something to
> reference on my end.
> There is a condition in which this code explodes, here's the traceback:
> {noformat}
> Java::JavaLang::IllegalArgumentException:
> com.google.common.base.Preconditions.checkArgument(com/google/common/base/Preconditions.java:128)
>
> org.apache.calcite.rex.RexLiteral.<init>(org/apache/calcite/rex/RexLiteral.java:221)
>
> org.apache.calcite.rex.RexBuilder.makeLiteral(org/apache/calcite/rex/RexBuilder.java:982)
>
> org.apache.calcite.rex.RexBuilder.makeSearchArgumentLiteral(org/apache/calcite/rex/RexBuilder.java:1077)
>
> org.apache.calcite.rex.RexSimplify$SargCollector.fix(org/apache/calcite/rex/RexSimplify.java:2719)
>
> org.apache.calcite.rex.RexSimplify.lambda$simplifyAnd$4(org/apache/calcite/rex/RexSimplify.java:1335)
> java.util.ArrayList.forEach(java/util/ArrayList.java:1257)
>
> org.apache.calcite.rex.RexSimplify.simplifyAnd(org/apache/calcite/rex/RexSimplify.java:1335)
>
> org.apache.calcite.rex.RexSimplify.simplify(org/apache/calcite/rex/RexSimplify.java:274)
>
> org.apache.calcite.rex.RexSimplify.simplifyUnknownAs(org/apache/calcite/rex/RexSimplify.java:243)
>
> org.apache.calcite.rex.RexSimplify.simplifyUnknownAsFalse(org/apache/calcite/rex/RexSimplify.java:232)
>
> org.apache.calcite.plan.SubstitutionVisitor.splitFilter(org/apache/calcite/plan/SubstitutionVisitor.java:307)
>
> org.apache.calcite.rel.rules.materialize.MaterializedViewRule.computeCompensationPredicates(org/apache/calcite/rel/rules/materialize/MaterializedViewRule.java:834){noformat}
> It has _something_ to do with trying to calling into `splitFilter` with an
> OR(SEARCH\(x), IS_NULL\(x)) and a IS_NOT_NULL\(x), where x is an unknown type.
>
> Here is my failed attempt to make a repro case (in Kotlin, again sorry):
> {noformat}
> @Test
> fun testUnknownBadness() {
> val relBuilder = relBuilder()
> val unknownTypeFunc = object: SqlOperator("some_func", SqlKind.OTHER, 0,
> false, null, null, null) {
> override fun getSyntax(): SqlSyntax {
> return SqlSyntax.FUNCTION
> }
> override fun inferReturnType(opBinding: SqlOperatorBinding):
> RelDataType {
> return opBinding.typeFactory.createUnknownType()
> }
> }
> val boolFunc = object: SqlOperator("bool_func", SqlKind.OTHER, 0, false,
> ReturnTypes.BOOLEAN, null, null) {
> override fun getSyntax(): SqlSyntax {
> return SqlSyntax.FUNCTION
> }
> }
> relBuilder.values(listOf("age").toTypedArray(), 25)
> relBuilder.project(relBuilder.field("age"),
> relBuilder.call(unknownTypeFunc, relBuilder.field("age")))
> val ex = RexUtil.EXECUTOR
> val simpl = RexSimplify(relBuilder.rexBuilder, RelOptPredicateList.EMPTY,
> ex)
> SubstitutionVisitor.splitFilter(simpl,
> relBuilder.rexBuilder.makeCall(
> SqlStdOperatorTable.OR,
> relBuilder.call(SqlStdOperatorTable.IS_NULL, relBuilder.field(1)),
> relBuilder.call(boolFunc, relBuilder.field(1))
> ),
> relBuilder.call(SqlStdOperatorTable.IS_NOT_NULL, relBuilder.field(1)))
> }
> {noformat}
> Chatting with [~julianhyde], we have the strong suspicion this relates to
> CALCITE-4446, though I can't say for sure because I'm unable to boil it down
> right now into something simple.
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