Informix - Problem description
Problem IT35463 | Status: Closed |
OPTIMIZER CHOOSES KEY-FIRST ACCESS PATH CAUSING SLOW QUERY RESPONSE | |
product: | |
INFORMIX SERVER / 5725A3900 / C10 - IDS 12.10 | |
Problem description: | |
Originally the optimizer was choosing the proper explicit index ix1_tab1 from table tab1: (1) Index Name: informix.ix1_tab1 Index Keys: company parameter (Serial, fragments: ALL) Lower Index Filter: (informix.tab1.parameter = 'xyz' AND informix.tab1.company = '01' ) Sudenlly it started using the implicit primary key index, choosing Key-First access path: (1) Index Name: informix. 10440_94656 Index Keys: company notice_recv seq_notice_recv parameter (Key-First) (Serial, fragments: ALL) Lower Index Filter: informix.tab1.company = '01' | |
Problem Summary: | |
**************************************************************** * USERS AFFECTED: * * IDS-12.10.xC14 onwards * **************************************************************** * PROBLEM DESCRIPTION: * * optimizer chooses key-first access path causing slow query * * response * **************************************************************** * RECOMMENDATION: * **************************************************************** | |
Local Fix: | |
Solution | |
Workaround | |
**************************************************************** * USERS AFFECTED: * * IDS-12.10.xC14 onwards * **************************************************************** * PROBLEM DESCRIPTION: * * optimizer chooses key-first access path causing slow query * * response * **************************************************************** * RECOMMENDATION: * **************************************************************** | |
Timestamps | |
Date - problem reported : Date - problem closed : Date - last modified : | 08.01.2021 25.11.2022 25.11.2022 |
Problem solved at the following versions (IBM BugInfos) | |
Problem solved according to the fixlist(s) of the following version(s) |