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92 lines
1.6 KiB
92 lines
1.6 KiB
8 years ago
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-- enum check
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create type rainbow as enum ('r','o','y','g','b','i','v');
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CREATE TABLE enumtmp (a rainbow);
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\copy enumtmp from 'data/enum.data'
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SET enable_seqscan=on;
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select a, count(*) from enumtmp group by a order by 1;
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a | count
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---+-------
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r | 76
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o | 78
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y | 73
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g | 75
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b | 77
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i | 78
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v | 75
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(8 rows)
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SELECT count(*) FROM enumtmp WHERE a < 'g'::rainbow;
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count
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-------
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227
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(1 row)
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SELECT count(*) FROM enumtmp WHERE a <= 'g'::rainbow;
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count
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-------
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302
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(1 row)
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SELECT count(*) FROM enumtmp WHERE a = 'g'::rainbow;
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count
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-------
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75
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(1 row)
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SELECT count(*) FROM enumtmp WHERE a >= 'g'::rainbow;
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count
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-------
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305
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(1 row)
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SELECT count(*) FROM enumtmp WHERE a > 'g'::rainbow;
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count
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-------
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230
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(1 row)
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CREATE INDEX enumidx ON enumtmp USING gist ( a );
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SET enable_seqscan=off;
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SELECT count(*) FROM enumtmp WHERE a < 'g'::rainbow;
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count
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-------
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227
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(1 row)
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SELECT count(*) FROM enumtmp WHERE a <= 'g'::rainbow;
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count
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-------
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302
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(1 row)
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SELECT count(*) FROM enumtmp WHERE a = 'g'::rainbow;
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count
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-------
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75
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(1 row)
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SELECT count(*) FROM enumtmp WHERE a >= 'g'::rainbow;
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count
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-------
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305
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(1 row)
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SELECT count(*) FROM enumtmp WHERE a > 'g'::rainbow;
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count
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-------
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230
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(1 row)
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EXPLAIN (COSTS OFF)
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SELECT count(*) FROM enumtmp WHERE a >= 'g'::rainbow;
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QUERY PLAN
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-----------------------------------------------
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Aggregate
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-> Bitmap Heap Scan on enumtmp
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Recheck Cond: (a >= 'g'::rainbow)
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-> Bitmap Index Scan on enumidx
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Index Cond: (a >= 'g'::rainbow)
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(5 rows)
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