Volodymyr Vysotskyi created CALCITE-2069:
--------------------------------------------
Summary: 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
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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