[jira] [Created] (CALCITE-2069) RexSimplify.removeNullabilityCast() always removes cast for operand with ANY type

["Volodymyr Vysotskyi (JIRA)" <ji...@apache.org>]

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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