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https://issues.apache.org/jira/browse/CALCITE-6346?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17840024#comment-17840024
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Ulrich Kramer commented on CALCITE-6346:
----------------------------------------
This seems to be related to {{RexSimplify::simplifyCast}}
{code:java}
if (sameTypeOrNarrowsNullability(e.getType(), operand.getType())) {
return operand;
}
{code}
should be
{code:java}
if (sameTypeOrNarrowsNullability(e.getType(), operand.getType()) &&
!(operand instanceof RexDynamicParam)) {
return operand;
}
{code}
> JdbcAdapter: Cast for dynamic filter arguments is lost
> ------------------------------------------------------
>
> Key: CALCITE-6346
> URL: https://issues.apache.org/jira/browse/CALCITE-6346
> Project: Calcite
> Issue Type: Bug
> Components: jdbc-adapter
> Affects Versions: 1.36.0
> Reporter: Corvin Kuebler
> Priority: Major
>
> Hey,
> today we encouraged some issues with the jdbc adapter behaviour.
> We have a statement like this:
> {code:java}
> SELECT CASE WHEN CAST(? AS VARCHAR) = CAST(? AS VARCHAR) THEN "NAME" END
> FROM "AUTHORS"
> The parameters are ["some", 1].
> {code}
> The statement that is pushed via JDBC Adapter looks like this:
> {code:java}
> SELECT CASE WHEN ? = ? THEN "NAME" END
> FROM "AUTHORS"
> {code}
> The cast in the resulting statement is lost and therefore we get:
> ERROR: operator does not exist: character varying = integer Hint: No operator
> matches the given name and argument types. You might need to add explicit
> type casts.
> As this example is not minimal I was able to reproduce it with the following
> test in JdbcTests:
> {code:java}
> @Test void testFilterPush() {
> CalciteAssert.that()
> .with(CalciteAssert.Config.FOODMART_CLONE)
> .query("SELECT * FROM \"foodmart\".\"sales_fact_1997\"" +
> " WHERE cast(? as varchar) = cast(? as varchar)")
> .planHasSql("SELECT *\n" +
> "FROM \"foodmart\".\"sales_fact_1997\"\n" +
> "WHERE cast(? as varchar) = cast(? as varchar)");
> }
> {code}
> The test shows the exact behaviour as it fails with the following:
> Caused by: java.sql.SQLSyntaxErrorException: data type cast needed for
> parameter or null literal in statement [SELECT *
> FROM "foodmart"."sales_fact_1997"
> WHERE ? = ?
> As can be seen in the exception message, the cast is also lost in this
> scenario
> To me it seems like an obvious bug, but maybe I am missing something here.
> I hope some1 can help :)
> BR,
> Corvin
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