Re: [HACKERS] patch: function xmltable

Now, almost all code, related to this behave, is in next few lines.

+   /*
+    * Use implicit column when it is necessary. The COLUMNS clause is optional
+    * on Oracle and DB2. In this case a result is complete row of XML type.
+    */
+   if (rtf->columns == NIL)
+   {
+       RangeTableFuncCol *fc = makeNode(RangeTableFuncCol);
+       A_Const *n = makeNode(A_Const);
+
+       fc->colname = "xmltable";
+       fc->typeName = makeTypeNameFromOid(XMLOID, -1);
+       n->val.type = T_String;
+       n->val.val.str = ".";
+       n->location = -1;
+
+       fc->colexpr = (Node *) n;
+       rtf->columns = list_make1(fc);
+   }