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6bce5da97b
Since the number of buckets of the histogram function is an argument to the function call it is possible to initialize the histogram state with a lower number than actually needed in further calls leading to a segfault. This patch changes the memory access to use the number the state was initialized with instead of the number passed to the call. This also changes the function to error when the passed number differs from the initialized state.
54 lines
1.9 KiB
SQL
54 lines
1.9 KiB
SQL
-- This file and its contents are licensed under the Apache License 2.0.
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-- Please see the included NOTICE for copyright information and
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-- LICENSE-APACHE for a copy of the license.
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-- table 1
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CREATE TABLE "hitest1"(key real, val varchar(40));
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-- insertions
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INSERT INTO "hitest1" VALUES(0, 'hi');
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INSERT INTO "hitest1" VALUES(1, 'sup');
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INSERT INTO "hitest1" VALUES(2, 'hello');
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INSERT INTO "hitest1" VALUES(3, 'yo');
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INSERT INTO "hitest1" VALUES(4, 'howdy');
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INSERT INTO "hitest1" VALUES(5, 'hola');
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INSERT INTO "hitest1" VALUES(6, 'ya');
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INSERT INTO "hitest1" VALUES(1, 'sup');
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INSERT INTO "hitest1" VALUES(2, 'hello');
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INSERT INTO "hitest1" VALUES(1, 'sup');
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-- table 2
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CREATE TABLE "hitest2"(name varchar(30), score integer, qualify boolean);
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-- insertions
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INSERT INTO "hitest2" VALUES('Tom', 6, TRUE);
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INSERT INTO "hitest2" VALUES('Mary', 4, FALSE);
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INSERT INTO "hitest2" VALUES('Jaq', 3, FALSE);
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INSERT INTO "hitest2" VALUES('Jane', 10, TRUE);
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-- standard 2 bucket
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SELECT histogram(key, 0, 9, 2) FROM hitest1;
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-- standard multi-bucket
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SELECT histogram(key, 0, 9, 5) FROM hitest1;
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-- standard 3 bucket
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SELECT val, histogram(key, 0, 7, 3) FROM hitest1 GROUP BY val ORDER BY val;
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-- standard element beneath lb
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SELECT histogram(key, 1, 7, 3) FROM hitest1;
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-- standard element above ub
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SELECT histogram(key, 0, 3, 3) FROM hitest1;
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-- standard element beneath and above lb and ub, respectively
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SELECT histogram(key, 1, 3, 2) FROM hitest1;
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-- standard 1 bucket
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SELECT histogram(key, 1, 3, 1) FROM hitest1;
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-- standard 2 bucket
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SELECT qualify, histogram(score, 0, 10, 2) FROM hitest2 GROUP BY qualify ORDER BY qualify;
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-- standard multi-bucket
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SELECT qualify, histogram(score, 0, 10, 5) FROM hitest2 GROUP BY qualify ORDER BY qualify;
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-- check number of buckets is constant
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\set ON_ERROR_STOP 0
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select histogram(i,10,90,case when i=1 then 1 else 1000000 end) FROM generate_series(1,100) i;
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\set ON_ERROR_STOP 1
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