kgyrtkirk commented on a change in pull request #1875:
URL: https://github.com/apache/hive/pull/1875#discussion_r566176263
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File path: ql/src/java/org/apache/hadoop/hive/ql/parse/CalcitePlanner.java
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@@ -679,27 +680,15 @@ Operator genOPTree(ASTNode ast, PlannerContext
plannerCtx) throws SemanticExcept
// Determine if we should re-throw the exception OR if we try to
mark plan as reAnayzeAST to retry
// planning as non-CBO.
- if (e instanceof CalciteSubquerySemanticException || e instanceof
CalciteViewSemanticException
- || e instanceof CalciteSubqueryRuntimeException) {
- // Non-CBO path for CalciteSubquerySemanticException fails with
completely different error
- // and masks the original failure.
- // Non-CBO path for CalciteViewSemanticException would fail in a
similar way as CBO path.
- throw new SemanticException(e);
- }
-
- boolean isHiveTest = conf.getBoolVar(ConfVars.HIVE_IN_TEST);
- // At this point we retry with CBO off:
- // 1) If this is not test mode (common case)
- // 2) If we are in test mode and we are missing stats
- // 3) if we are in test mode and a CalciteSemanticException is
generated
- reAnalyzeAST = (!isHiveTest || isMissingStats || e instanceof
CalciteSemanticException);
Review comment:
okay we could add a new mode to experiment with this - but I'm not sure
how usefull that would be; we can start with whitelisting the case when column
stats are missing - but I think that will not get us much further...probably
enabling that mode will expose in which other cases we should fall back...
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