[IMPALA-151] bad DCHECK on "select count(foo, bar)" queries

• Type: Bug
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Affects Version/s: Impala 0.6
• Fix Version/s: Impala 0.7
• Assignee: Alexander Behm
• Reporter: Skye Wanderman-Milne
• Created: 19/Mar/13 17:15
• Updated: 20/Dec/15 00:04
• Resolved: 21/Mar/13 02:44

Description

If you run a query like "select count(foo, bar) from tbl" (which AFAIK is not valid SQL) impalad hits the following dcheck:

F0319 10:12:22.470366 24267 agg-expr.cc:53] Check failed: GetNumChildren() <= 1 (2 vs. 1)

We should signal an error rather than crashing.