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Informix - Problem description

Problem IT29969 Status: Closed

SELECT STATEMENT WITH LEFT JOIN AND SUBQUERY IS EXTREMLY SLOW

product:
INFORMIX SERVER / 5725A3900 / E10 - 
Problem description:
a statement with 5 left joins and a where condition of the form:



WHERE
        a.a1>=(DATE("08/28/2017")-10)
        AND a.a2 IN ( 7 )
        AND a.a3 IN (
                SELECT
                        b2t.t_fk
                FROM
                        b2t
                WHERE
                        b2t.b_fk=99
        )
 will run very slow without PDQ.
Problem Summary:
****************************************************************
* USERS AFFECTED:                                              *
* Users of Informix 14.10.xC1.                                 *
****************************************************************
* PROBLEM DESCRIPTION:                                         *
* SELECT STATEMENT WITH LEFT JOIN AND SUBQUERY IS EXTREMELY    *
* SLOW                                                         *
****************************************************************
* RECOMMENDATION:                                              *
****************************************************************
Local Fix:
onmode -wf SQL_FEAT_CTRL2=0x10
Solution
Workaround
not known / see Local fix
Timestamps
Date  - problem reported    :
Date  - problem closed      :
Date  - last modified       :
12.08.2019
19.09.2019
19.09.2019
Problem solved at the following versions (IBM BugInfos)
14.10.xC2
Problem solved according to the fixlist(s) of the following version(s)
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