77 lines
1.6 KiB
Plaintext
77 lines
1.6 KiB
Plaintext
-- bit check
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CREATE TABLE bittmp (a bit(33));
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\copy bittmp from 'data/bit.data'
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SET enable_seqscan=on;
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SELECT count(*) FROM bittmp WHERE a < '011011000100010111011000110000100';
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count
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-------
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249
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(1 row)
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SELECT count(*) FROM bittmp WHERE a <= '011011000100010111011000110000100';
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count
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-------
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250
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(1 row)
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SELECT count(*) FROM bittmp WHERE a = '011011000100010111011000110000100';
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count
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-------
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1
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(1 row)
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SELECT count(*) FROM bittmp WHERE a >= '011011000100010111011000110000100';
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count
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-------
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351
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(1 row)
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SELECT count(*) FROM bittmp WHERE a > '011011000100010111011000110000100';
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count
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-------
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350
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(1 row)
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CREATE INDEX bitidx ON bittmp USING GIST ( a );
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SET enable_seqscan=off;
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SELECT count(*) FROM bittmp WHERE a < '011011000100010111011000110000100';
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count
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-------
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249
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(1 row)
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SELECT count(*) FROM bittmp WHERE a <= '011011000100010111011000110000100';
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count
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-------
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250
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(1 row)
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SELECT count(*) FROM bittmp WHERE a = '011011000100010111011000110000100';
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count
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-------
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1
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(1 row)
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SELECT count(*) FROM bittmp WHERE a >= '011011000100010111011000110000100';
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count
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-------
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351
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(1 row)
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SELECT count(*) FROM bittmp WHERE a > '011011000100010111011000110000100';
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count
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-------
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350
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(1 row)
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-- Test index-only scans
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SET enable_bitmapscan=off;
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EXPLAIN (COSTS OFF)
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SELECT a FROM bittmp WHERE a BETWEEN '1000000' and '1000001';
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QUERY PLAN
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---------------------------------------------------------------------
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Index Only Scan using bitidx on bittmp
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Index Cond: ((a >= '1000000'::"bit") AND (a <= '1000001'::"bit"))
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(2 rows)
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