[CALCITE-4716] ClassCastException converting SARG in RelNode to SQL

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 1.28.0
• Component/s: core
• Labels: pull-request-available
• Assignee: Jesús Camacho Rodríguez
• Reporter: Jesús Camacho Rodríguez
• Created: 04/Aug/21 19:17
• Updated: 27/Feb/24 22:23
• Resolved: 12/Aug/21 16:40

Description

The stacktrace is the following:

class org.apache.calcite.rex.RexLocalRef cannot be cast to class org.apache.calcite.rex.RexLiteral (org.apache.calcite.rex.RexLocalRef and org.apache.calcite.rex.RexLiteral are in unnamed module of loader 'app')
java.lang.ClassCastException: class org.apache.calcite.rex.RexLocalRef cannot be cast to class org.apache.calcite.rex.RexLiteral (org.apache.calcite.rex.RexLocalRef and org.apache.calcite.rex.RexLiteral are in unnamed module of loader 'app')
	at org.apache.calcite.rel.rel2sql.SqlImplementor$Context.toSql(SqlImplementor.java:695)
	at org.apache.calcite.rel.rel2sql.SqlImplementor$Context.toSql(SqlImplementor.java:597)
...

The relevant expressions in the Calc operator are the following:

...expr#5=[Sarg[(10..11]]], expr#6=[SEARCH($t0, $t5)]...

The current code in SqlImplementor considers the second argument to SEARCH is always a RexLiteral:

...
      case SEARCH:
        final RexCall search = (RexCall) rex;
        literal = (RexLiteral) search.operands.get(1);
        final Sarg sarg = castNonNull(literal.getValueAs(Sarg.class));
        //noinspection unchecked
        return toSql(program, search.operands.get(0), literal.getType(), sarg);
...

Issue Links

• links to: GitHub Pull Request #2474