return super.transform(opFilter, op) ;
SqlNode sqlNode = ((OpSQL)op).getSqlNode() ;
if ( ! sqlNode.isSelectBlock() )
return super.transform(opFilter, op) ;
SqlSelectBlock ssb = sqlNode.asSelectBlock() ;
ExprList exprs = opFilter.getExprs() ;
ExprList exprs2 = new ExprList() ;
for ( Object obj : exprs.getList() )