File: char.sql

package info (click to toggle)
postgresql-9.6 9.6.17-0%2Bdeb9u1
  • links: PTS, VCS
  • area: main
  • in suites: stretch
  • size: 129,840 kB
  • sloc: ansic: 743,530; sql: 67,512; xml: 30,901; yacc: 30,445; perl: 16,302; lex: 7,822; sh: 5,290; makefile: 4,780; python: 112; asm: 65; sed: 15
file content (37 lines) | stat: -rw-r--r-- 970 bytes parent folder | download | duplicates (9)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
-- char check

CREATE TABLE chartmp (a char(32));

\copy chartmp from 'data/char.data'

SET enable_seqscan=on;

SELECT count(*) FROM chartmp WHERE a <   '31b0'::char(32);

SELECT count(*) FROM chartmp WHERE a <=  '31b0'::char(32);

SELECT count(*) FROM chartmp WHERE a  =  '31b0'::char(32);

SELECT count(*) FROM chartmp WHERE a >=  '31b0'::char(32);

SELECT count(*) FROM chartmp WHERE a >   '31b0'::char(32);

CREATE INDEX charidx ON chartmp USING GIST ( a );

SET enable_seqscan=off;

SELECT count(*) FROM chartmp WHERE a <   '31b0'::char(32);

SELECT count(*) FROM chartmp WHERE a <=  '31b0'::char(32);

SELECT count(*) FROM chartmp WHERE a  =  '31b0'::char(32);

SELECT count(*) FROM chartmp WHERE a >=  '31b0'::char(32);

SELECT count(*) FROM chartmp WHERE a >   '31b0'::char(32);

-- Test index-only scans
SET enable_bitmapscan=off;
EXPLAIN (COSTS OFF)
SELECT * FROM chartmp WHERE a BETWEEN '31a' AND '31c';
SELECT * FROM chartmp WHERE a BETWEEN '31a' AND '31c';