Github user shivzone commented on a diff in the pull request:
https://github.com/apache/incubator-hawq/pull/981#discussion_r85998628
--- Diff: src/backend/access/external/pxffilters.c ---
@@ -357,6 +393,46 @@ pxf_serialize_filter_list(List *expressionItems)
switch (tag)
{
+ case T_Var:
+ {
+ elog(DEBUG1, "pxf_serialize_filter_list: node
tag %d (T_Var)", tag);
+ PxfFilterDesc *filter = (PxfFilterDesc *)
palloc0(sizeof(PxfFilterDesc));
+ Var *var = (Var *) node;
+ if (var_to_pxffilter(var, filter))
+ {
+ PxfOperand l = filter->l;
+ PxfOperand r = filter->r;
+ PxfOperatorCode o = filter->op;
+ if (pxfoperand_is_attr(l) &&
pxfoperand_is_scalar_const(r))
--- End diff --
Can we have a scenario which is left operand is scalar const and right
operand is attirbute ?
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