[IMPALA-2398] [Nit]: Change error text on Explain Query for Compute Stats Command

• Type: Improvement
• Status: Resolved
• Priority: Minor
• Resolution: Duplicate
• Affects Version/s: Impala 2.3.0, Impala 2.5.0
• Component/s: Frontend
• Target Version: Product Backlog
• Assignee: Unassigned
• Reporter: Aleksandr Shulman
• Created: 23/Sep/15 17:55
• Updated: 28/Dec/20 06:55
• Resolved: 28/Dec/20 06:55

Description

Minor fit & finish nit, but we should take care of it.

Expected behavior:
Attempting to perform an 'Explain Query' operation on a command to compute table stats should result in an explanation that explain query on a table stats call is an undefined operation.

Observed behavior:
Command: COMPUTE STATS orders;
Output: AnalysisException: Syntax error in line 1: EXPLAIN COMPUTE STATS orders ^ Encountered: COMPUTE Expected: CREATE, INSERT, SELECT, VALUES, WITH CAUSED BY: Exception: Syntax error

Why this should be fixed:
The error should instruct the user that the operation they are trying to perform is not supported, instead of claiming that it is a syntax error, as the syntax is correct.

Issue Links

• duplicates: IMPALA-4755 Add EXPLAIN for COMPUTE STATS