Wrong Result With Projection Pushdown Disabled After Upgrading To 12.2
(Doc ID 2407464.1)
Last updated on FEBRUARY 20, 2019
Applies to:Oracle Database - Enterprise Edition - Version 126.96.36.199 and later
Oracle Database Cloud Schema Service - Version N/A and later
Oracle Database Exadata Express Cloud Service - Version N/A and later
Oracle Database Exadata Cloud Machine - Version N/A and later
Oracle Cloud Infrastructure - Database Service - Version N/A and later
Information in this document applies to any platform.
- Query returns more rows than normal when projection push-down is disabled after upgrading to 12.2
- None of the following workarounds returns correct results:
alter session set "_fix_control" = '23210039:0';
alter session set "_optimizer_aggr_groupby_elim" = FALSE ;
alter session set "_optimizer_cbqt_or_expansion"=off;
alter session set optimizer_features_enable = '188.8.131.52';
alter session set "_optimizer_group_by_placement" = false;
alter session set "_optimizer_ansi_rearchitecture" = FALSE;
- The only work-around that gives results is setting _PUSH_JOIN_PREDICATE to TRUE
Upgrade to 12.2.
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