| Subject | Re: ODP: [firebird-support] Query that was very fast under the oldest 2.5 versions are very slow under 2.5.8 or 2.5.9 |
|---|---|
| Author | |
| Post date | 2019-05-29T11:37:29Z |
Hi Karol;
But this is not the problem, because 2.5.0 does this query very fast, with no special cache settings. The very important diference is the plan. 2.5.8 is not using MOVI_FECH index, so it must read more than one millon records to analize ("MOVI"."FECH"
between '20190301' and '20190412'). This is the MOVI ddl:
CREATE TABLE MOVI
(
MOVI Char(10) NOT NULL COLLATE ES_ES_AI,
PROC Char(10) NOT NULL COLLATE ES_ES_AI,
MIEM Char(10) NOT NULL COLLATE ES_ES_AI,
TIPO Char(1) NOT NULL COLLATE ES_ES_AI,
AVIS Char(3) NOT NULL COLLATE ES_ES_AI,
HECH Char(1) NOT NULL COLLATE ES_ES_AI,
FECH Char(8) NOT NULL COLLATE ES_ES_AI,
HORA Char(4) NOT NULL COLLATE ES_ES_AI,
DSCR Varchar(200) NOT NULL COLLATE ES_ES_AI,
FOJA Varchar(10) NOT NULL COLLATE ES_ES_AI,
PRES Char(1) NOT NULL COLLATE ES_ES_AI,
REPI Char(1) NOT NULL COLLATE ES_ES_AI,
OWNR Char(10) NOT NULL COLLATE ES_ES_AI,
TEXT Blob sub_type 0,
"EDIT" Char(23) NOT NULL COLLATE ES_ES_AI,
CONSTRAINT MOVI_PK PRIMARY KEY (MOVI)
);
CREATE INDEX MOVI_FECH ON MOVI (FECH,HORA);
CREATE INDEX MOVI_HECH ON MOVI (HECH);
CREATE INDEX MOVI_MIEM ON MOVI (MIEM);
CREATE INDEX MOVI_OWNR ON MOVI (OWNR);
CREATE INDEX MOVI_PRES ON MOVI (PRES);
CREATE INDEX MOVI_PROC ON MOVI (PROC);
CREATE INDEX MOVI_REPI ON MOVI (REPI);
CREATE INDEX MOVI_TIPO ON MOVI (TIPO);
Thank you.