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https://issues.apache.org/jira/browse/CALCITE-2069?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Julian Hyde updated CALCITE-2069:
---------------------------------
Fix Version/s: 1.16.0
> RexSimplify.removeNullabilityCast() always removes cast for operand with ANY
> type
> ---------------------------------------------------------------------------------
>
> Key: CALCITE-2069
> URL: https://issues.apache.org/jira/browse/CALCITE-2069
> Project: Calcite
> Issue Type: Bug
> Reporter: Volodymyr Vysotskyi
> Assignee: Julian Hyde
> Fix For: 1.16.0
>
>
> When a field is received from Dynamic Table, its type left {{ANY}}, and it is
> used in the filter condition with the cast, which actually should produce
> physical cast (for example we are trying to cast varchar to boolean)
> {{RexSimplify.removeNullabilityCast()}} removes this cast and lefts only
> field in condition.
> This test helps to observe this issue:
> {code:java}
> @Test public void testFilterCastAny() {
> final RelBuilder builder = RelBuilder.create(config().build());
> final RelDataType intType =
> builder.getTypeFactory().createSqlType(SqlTypeName.ANY);
> RelNode root =
> builder.scan("EMP")
> .filter(
> builder.cast(
> builder.patternField("varchar_field", intType, 0),
> SqlTypeName.BOOLEAN))
> .build();
> assertThat(str(root),
> is("LogicalFilter(condition=[CAST(varchar_field.$0):BOOLEAN NOT
> NULL])\n"
> + " LogicalTableScan(table=[[scott, EMP]])\n"));
> }
> {code}
> It happens because {{SqlTypeUtil.equalSansNullability()}} returns true if any
> of its arguments has {{ANY}} type.
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