[jira] [Created] (CALCITE-6518) ClassCastException during validation when loading multiple libraries

[Mihai Budiu (Jira)]

Mihai Budiu created CALCITE-6518:
------------------------------------

             Summary: ClassCastException during validation when loading 
multiple libraries
                 Key: CALCITE-6518
                 URL: https://issues.apache.org/jira/browse/CALCITE-6518
             Project: Calcite
          Issue Type: Bug
          Components: core
    Affects Versions: 1.37.0
            Reporter: Mihai Budiu


The following test added to CalciteSqlOperatorTest will cause a 
ClassCastException:

{code:java}
  @Test void testLibraries() {
    SqlOperatorFixture sqlOperatorFixture = fixture();
    final SqlOperatorFixture f = sqlOperatorFixture.withOperatorTable(
            SqlLibraryOperatorTableFactory.INSTANCE
                .getOperatorTable(
                    SqlLibrary.STANDARD,
                    SqlLibrary.MYSQL,
                    SqlLibrary.POSTGRESQL
                ));
    f.checkScalar("substr('a', 1, 2)", "a", "VARCHAR(1) NOT NULL");
  }
{code}

Here is the top of the stack trace:

{code}
class org.apache.calcite.sql.type.FamilyOperandTypeChecker cannot be cast to 
class org.apache.calcite.sql.type.SqlOperandMetadata 
(org.apache.calcite.sql.type.FamilyOperandTypeChecker and 
org.apache.calcite.sql.type.SqlOperandMetadata are in unnamed module of loader 
'app')
java.lang.ClassCastException: class 
org.apache.calcite.sql.type.FamilyOperandTypeChecker cannot be cast to class 
org.apache.calcite.sql.type.SqlOperandMetadata 
(org.apache.calcite.sql.type.FamilyOperandTypeChecker and 
org.apache.calcite.sql.type.SqlOperandMetadata are in unnamed module of loader 
'app')
        at 
org.apache.calcite.sql.validate.implicit.TypeCoercionImpl.userDefinedFunctionCoercion(TypeCoercionImpl.java:601)
        at org.apache.calcite.sql.SqlFunction.deriveType(SqlFunction.java:313)
        at org.apache.calcite.sql.SqlFunction.deriveType(SqlFunction.java:231)
        at 
org.apache.calcite.sql.validate.SqlValidatorImpl$DeriveTypeVisitor.visit(SqlValidatorImpl.java:6789)
        at 
org.apache.calcite.sql.validate.SqlValidatorImpl$DeriveTypeVisitor.visit(SqlValidatorImpl.java:6776)
        at org.apache.calcite.sql.SqlCall.accept(SqlCall.java:167)
        at 
org.apache.calcite.sql.validate.SqlValidatorImpl.deriveTypeImpl(SqlValidatorImpl.java:2006)
        at 
org.apache.calcite.sql.validate.SqlValidatorImpl.deriveType(SqlValidatorImpl.java:1993)
        at org.apache.calcite.sql.SqlNode.validateExpr(SqlNode.java:276)
        at org.apache.calcite.sql.SqlOperator.validateCall(SqlOperator.java:474)
        at 
org.apache.calcite.sql.validate.SqlValidatorImpl.validateCall(SqlValidatorImpl.java:6446)
        at org.apache.calcite.sql.SqlCall.validate(SqlCall.java:144)
        at org.apache.calcite.sql.SqlNode.validateExpr(SqlNode.java:275)
        at org.apache.calcite.sql.SqlOperator.validateCall(SqlOperator.java:474)
        at 
org.apache.calcite.sql.validate.SqlValidatorImpl.validateCall(SqlValidatorImpl.java:6446)
        at org.apache.calcite.sql.SqlCall.validate(SqlCall.java:144)
        at 
org.apache.calcite.sql.validate.SqlValidatorImpl.validateScopedExpression(SqlValidatorImpl.java:1143)
        at 
org.apache.calcite.sql.validate.SqlValidatorImpl.validate(SqlValidatorImpl.java:849)
        at 
org.apache.calcite.sql.test.AbstractSqlTester.parseAndValidate(AbstractSqlTester.java:162)
        at 
org.apache.calcite.sql.test.AbstractSqlTester.validateAndThen(AbstractSqlTester.java:250)
{code}

Calcite behaves correctly if either the MYSQL or the POSTGRES libraries are not 
supplied.



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