How to use

fun

method

in

org.apache.calcite.config.CalciteConnectionConfig

private SqlValidator createSqlValidator(Context context,
  CalciteCatalogReader catalogReader) {
 final SqlOperatorTable opTab0 =
   context.config().fun(SqlOperatorTable.class,
     SqlStdOperatorTable.instance());
 final SqlOperatorTable opTab =
   ChainedSqlOperatorTable.of(opTab0, catalogReader);
 final JavaTypeFactory typeFactory = context.getTypeFactory();
 final SqlConformance conformance = context.config().conformance();
 return new CalciteSqlValidator(opTab, catalogReader, typeFactory,
   conformance);
}

private SqlValidator createSqlValidator(Context context,
                    CalciteCatalogReader catalogReader) {
 final SqlOperatorTable opTab0 =
   context.config().fun(SqlOperatorTable.class,
     SqlStdOperatorTable.instance());
 final SqlOperatorTable opTab =
   ChainedSqlOperatorTable.of(opTab0, catalogReader);
 final JavaTypeFactory typeFactory = context.getTypeFactory();
 final SqlConformance conformance = context.config().conformance();
 return new CalciteSqlValidator(opTab, catalogReader, typeFactory,
   conformance);
}

private SqlValidator createSqlValidator(Context context,
  CalciteCatalogReader catalogReader) {
 final SqlOperatorTable opTab0 =
   context.config().fun(SqlOperatorTable.class,
     SqlStdOperatorTable.instance());
 final SqlOperatorTable opTab =
   ChainedSqlOperatorTable.of(opTab0, catalogReader);
 final JavaTypeFactory typeFactory = context.getTypeFactory();
 final SqlConformance conformance = context.config().conformance();
 return new CalciteSqlValidator(opTab, catalogReader, typeFactory,
   conformance);
}