SQL Featuring View Merge Intermittently Fails with ORA-44203 "timeout waiting for lock on cursor" During Parse
(Doc ID 1500419.1)
Last updated on AUGUST 04, 2018
Applies to:
Oracle Server - Enterprise Edition - Version 11.2.0.3 and later
Information in this document applies to any platform.
Symptoms
- Intermittently the explain plan of a sql that involves view merging cannot be generated and fails with error ORA-44203 in 11.2.0.3.
SQL> @statement
explain plan for
*
ERROR at line 1:
ORA-44203: timeout waiting for lock on cursor
- The database was migrated to 11.2., and the explain plan ran fine in 10.2.0.3.
- Setting Optimizer_features_enable to 10.2.0.3 does not help.
- Errorstack for the session shows the following functions:
kkqvSearchOpn ()
qksopVisitOpns ()
kkqvRemoveOpnFromAllChains ()
kkqvRemoveOpnFromAllChains ()
kkqvRemoveOpnFromAllChains ()
....
kokqr_case_decode ()
kokqpcase ()
.
Changes
Database was Upgraded from 10.2 to 11.2.
Cause
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In this Document
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