Github user zellerh commented on a diff in the pull request:
https://github.com/apache/incubator-trafodion/pull/1169#discussion_r127105300
--- Diff: core/sql/optimizer/BindItemExpr.cpp ---
@@ -10851,6 +10851,96 @@ ItemExpr *ZZZBinderFunction::bindNode(BindWA
*bindWA)
}
break;
+ case ITM_CSV_FORMAT:
+ {
+ bindChildren(bindWA);
+ if (bindWA->errStatus())
+ return this;
+
+ // The way the arguments of CSV_FORMAT are represented in
+ // the parse tree is as a tree of ItemList nodes; so
+ // CSV_FORMAT(a,b,c,d) is represented as
+ //
+ // this
+ // / \
+ // a ItemList
+ // / \
+ // b ItemList
+ // / \
+ // c d
+ //
+ // The code below traverses accordingly.
--- End diff --
There is a class ItemExprList that can convert such trees into a collection
class. Other binder methods use that to traverse lists.
---
If your project is set up for it, you can reply to this email and have your
reply appear on GitHub as well. If your project does not have this feature
enabled and wishes so, or if the feature is enabled but not working, please
contact infrastructure at infrastruct...@apache.org or file a JIRA ticket
with INFRA.
---
