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124 lines
3.7 KiB
Plaintext
124 lines
3.7 KiB
Plaintext
# 2017-02-17
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#
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# The author disclaims copyright to this source code. In place of
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# a legal notice, here is a blessing:
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#
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# May you do good and not evil.
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# May you find forgiveness for yourself and forgive others.
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# May you share freely, never taking more than you give.
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#
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#***********************************************************************
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#
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# This file implements tests for the logic used to estimate when
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# running ANALYZE would be beneficial.
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#
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# Note that this test uses some hard-coded bitmask values from sqliteInt.h.
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# If any of the following constants changes:
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#
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# define TF_HasStat1 0x0010
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# define TF_StatsUsed 0x0100
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#
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# then some of the magic numbers in test results below might need to be
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# adjusted.
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#
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set testdir [file dirname $argv0]
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source $testdir/tester.tcl
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# There is nothing to test if ANALYZE is disable for this build.
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# These tests also use "PRAGMA stats" which are only enabled for
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# debugging builds.
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#
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ifcapable {!debug || !analyze || !vtab} {
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finish_test
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return
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}
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do_execsql_test autoanalyze1-100 {
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-- Build up a test table with some indexes
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CREATE TABLE t1(a INTEGER PRIMARY KEY, b, c, d);
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CREATE UNIQUE INDEX t1bc ON t1(b,c);
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CREATE INDEX t1d ON t1(d);
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WITH RECURSIVE c(x) AS (VALUES(1) UNION ALL SELECT x+1 FROM c WHERE x<100)
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INSERT INTO t1(a,b,c,d) SELECT x, x, x, x FROM c;
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-- Verify that the hasStat1 flag is clear on on indexes
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SELECT idx, flgs FROM pragma_stats
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WHERE idx IS NOT NULL
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ORDER BY idx;
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-- Verify that the TF_HasStat1 flag is clear on the table
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SELECT tbl, (flgs & 0x10)!=0 FROM pragma_stats WHERE tbl='t1' AND idx IS NULL;
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} {t1bc 0 t1d 0 t1 0}
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# No use of stat1 recorded so far
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do_execsql_test autoanalyze1-110 {
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SELECT (flgs & 0x0100)!=0 FROM pragma_stats WHERE tbl='t1' AND idx IS NULL;
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} {0}
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# Access using a unique index does not set the TF_StatsUsed flag.
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#
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do_execsql_test autoanalyze1-200 {
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SELECT * FROM t1 WHERE a=55;
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} {55 55 55 55}
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do_execsql_test autoanalyze1-201 {
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SELECT (flgs & 0x0100)!=0 FROM pragma_stats WHERE tbl='t1' AND idx IS NULL;
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} {0}
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do_execsql_test autoanalyze1-210 {
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SELECT * FROM t1 WHERE a IN (55,199,299);
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} {55 55 55 55}
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do_execsql_test autoanalyze1-211 {
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SELECT (flgs & 0x0100)!=0 FROM pragma_stats WHERE tbl='t1' AND idx IS NULL;
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} {0}
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do_execsql_test autoanalyze1-220 {
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SELECT * FROM t1 WHERE (b,c)=(45,45);
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} {45 45 45 45}
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do_execsql_test autoanalyze1-221 {
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SELECT (flgs & 0x0100)!=0 FROM pragma_stats WHERE tbl='t1' AND idx IS NULL;
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} {0}
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# Any use of the non-unique t1d index triggers the use of stats.
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#
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sqlite3 db test.db
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do_execsql_test autoanalyze1-300 {
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SELECT * FROM t1 WHERE d=45;
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} {45 45 45 45}
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do_execsql_test autoanalyze1-301 {
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SELECT (flgs & 0x0100)!=0 FROM pragma_stats WHERE tbl='t1' AND idx IS NULL;
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} {1}
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sqlite3 db test.db
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do_execsql_test autoanalyze1-310 {
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SELECT * FROM t1 WHERE d=45 AND a=45;
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} {45 45 45 45}
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do_execsql_test autoanalyze1-311 {
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SELECT (flgs & 0x0100)!=0 FROM pragma_stats WHERE tbl='t1' AND idx IS NULL;
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} {0} ;# The ROWID lookup short-circuits the d=45 constraint
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sqlite3 db test.db
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do_execsql_test autoanalyze1-320 {
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SELECT * FROM t1 WHERE d=45 AND a IN (45,46);
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} {45 45 45 45}
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do_execsql_test autoanalyze1-321 {
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SELECT (flgs & 0x0100)!=0 FROM pragma_stats WHERE tbl='t1' AND idx IS NULL;
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} {1}
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# Any use of prefix of a unique index triggers the use of stats
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#
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sqlite3 db test.db
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do_execsql_test autoanalyze1-400 {
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SELECT * FROM t1 WHERE b=45;
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} {45 45 45 45}
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do_execsql_test autoanalyze1-401 {
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SELECT (flgs & 0x0100)!=0 FROM pragma_stats WHERE tbl='t1' AND idx IS NULL;
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} {1}
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# The TF_StatsUsed flag is reset when the database is reopened
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#
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sqlite3 db test.db
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do_execsql_test autoanalyze1-500 {
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SELECT (flgs & 0x0100)!=0 FROM pragma_stats WHERE tbl='t1' AND idx IS NULL;
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} {0}
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finish_test
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