danny0405 commented on a change in pull request #1680: [CALCITE-3621] Push down
sort to DB, SQL of Sort rel contains explicit field name instead of * when sort
is not top rel
URL: https://github.com/apache/calcite/pull/1680#discussion_r361313332
##########
File path:
core/src/main/java/org/apache/calcite/rel/rel2sql/RelToSqlConverter.java
##########
@@ -634,6 +634,13 @@ public Result visit(Sort e) {
}
Result x = visitChild(0, e.getInput());
Builder builder = x.builder(e, Clause.ORDER_BY);
+ if (builder.select.getSelectList() == null) {
Review comment:
Just curious, shouldn't we generate `SELECT "t2"."full_name",
"t2"."last_name0" AS "last_name"` instead of `select *` ?
Why we need a decision `if (stack.getLast().r != e)` it looks weird.
Also, the generated sql outputs one more column than the original, i think
it is because we generate the sql using the RelRoot.rel directly. We better fix
this.
----------------------------------------------------------------
This is an automated message from the Apache Git Service.
To respond to the message, please log on to GitHub and use the
URL above to go to the specific comment.
For queries about this service, please contact Infrastructure at:
[email protected]
With regards,
Apache Git Services
