-----Original Message-----
From: [email protected]
[mailto:[email protected]] On Behalf Of [email protected]
Sent: Wednesday, October 21, 2009 2:03 PM
To: [email protected]
Subject: [sqlite] Like do not use index as previous version
Hi all,
it seems that in last versions on sqlite3 LIKE clause stopped to use
indexes; I created a new empty database with SQLIte 3.6.13 and I run
these statements :
CREATE TABLE TEST
(TEXT_1 text PRIMARY KEY, TEXT_2 text, TEXT_3 text COLLATE NOCASE);
CREATE INDEX TEST_IDX_2 ON TEST (TEXT_2); CREATE INDEX
TEST_IDX_3 ON TEST (TEXT_3);
Running explain query plan on "select * from test where text_3 like
'x';", I have the following result:
0|0|TABLE test WITH
INDEX TEST_IDX_3
And it's what I expected.
If I execute the some statements
in SQLite 3.6.16 and 3.6.19, I have this result:
0|0|TABLE test
So It's not
using the index as in 3.6.13 version.
The some if I try to use the operator
GLOB with field text_2: in SQLite 3.6.13 it uses the TEST_IDX_2 index
but it's
not used in SQLite 3.6.19.
Any suggestions?
==========================
Regarding suggestions:
Since "like" and "glob" are intended for use with wildcards and
you're not using wildcards, why not use
"where text_3 == 'x';"
instead?
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