[IMPALA-7094] Fallback to an unoptimized query if ExprRewriter fails

• Type: Improvement
• Status: Open
• Priority: Minor
• Resolution: Unresolved
• Affects Version/s: Impala 3.1.0
• Component/s: Frontend
• Epic Color: ghx-label-7
• Assignee: Unassigned
• Reporter: Tianyi Wang
• Created: 30/May/18 02:59
• Updated: 05/Jul/18 16:29

Description

The ExprRewriter in impala is growing more complex and sometimes fails. Currently the user have to disable the rewrite to workaround it until the bug is fixed. Impala should fallback to an unrewritten query automatically and print a warning to provide a smoother user experience if there are ExprRewriter bugs in the future. 

Issue Links

• is caused by: IMPALA-7083 AnalysisException for GROUP BY and ORDER BY expressions that are folded to constants from 2.9 onwards
• is related to: IMPALA-7250 AnalysisException in select datediff() with group by
• is related to: IMPALA-7090 EqualityDisjunctsToInRule should respect the limit on the number of children in an expr
• is related to: IMPALA-7027 Multiple Cast to Varchar with different limit fails with "AnalysisException: null CAUSED BY: IllegalArgumentException: "
• relates to: IMPALA-7106 Log the original and rewritten SQL when SQL rewrite fails