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Diffstat (limited to '')
| -rw-r--r-- | test/analyzeC.test | 181 |
1 files changed, 181 insertions, 0 deletions
diff --git a/test/analyzeC.test b/test/analyzeC.test new file mode 100644 index 0000000..2f43d57 --- /dev/null +++ b/test/analyzeC.test @@ -0,0 +1,181 @@ +# 2014-07-22 +# +# The author disclaims copyright to this source code. In place of +# a legal notice, here is a blessing: +# +# May you do good and not evil. +# May you find forgiveness for yourself and forgive others. +# May you share freely, never taking more than you give. +# +#*********************************************************************** +# +# This file contains automated tests used to verify that the text terms +# at the end of sqlite_stat1.stat are processed correctly. +# +# (1) "unordered" means that the index cannot be used for ORDER BY +# or for range queries +# +# (2) "sz=NNN" sets the relative size of the index entries +# +# (3) All other fields are silently ignored +# + +set testdir [file dirname $argv0] +source $testdir/tester.tcl +set testprefix analyzeC + +# Baseline case. Range queries work OK. Indexes can be used for +# ORDER BY. +# +do_execsql_test 1.0 { + CREATE TABLE t1(a,b,c); + INSERT INTO t1(a,b,c) + VALUES(1,2,3),(7,8,9),(4,5,6),(10,11,12),(4,8,12),(1,11,111); + CREATE INDEX t1a ON t1(a); + CREATE INDEX t1b ON t1(b); + ANALYZE; + DELETE FROM sqlite_stat1; + INSERT INTO sqlite_stat1(tbl,idx,stat) + VALUES('t1','t1a','12345 2'),('t1','t1b','12345 4'); + ANALYZE sqlite_master; + SELECT *, '#' FROM t1 WHERE a BETWEEN 3 AND 8 ORDER BY c; +} {4 5 6 # 7 8 9 # 4 8 12 #} +do_execsql_test 1.1 { + EXPLAIN QUERY PLAN + SELECT *, '#' FROM t1 WHERE a BETWEEN 3 AND 8 ORDER BY c; +} {/.* USING INDEX t1a .a>. AND a<...*/} +do_execsql_test 1.2 { + SELECT c FROM t1 ORDER BY a; +} {3 111 6 12 9 12} +do_execsql_test 1.3 { + EXPLAIN QUERY PLAN + SELECT c FROM t1 ORDER BY a; +} {/.*SCAN t1 USING INDEX t1a.*/} +do_execsql_test 1.3x { + EXPLAIN QUERY PLAN + SELECT c FROM t1 ORDER BY a; +} {~/.*B-TREE FOR ORDER BY.*/} + +# Now mark the t1a index as "unordered". Range queries and ORDER BY no +# longer use the index, but equality queries do. +# +do_execsql_test 2.0 { + UPDATE sqlite_stat1 SET stat='12345 2 unordered' WHERE idx='t1a'; + ANALYZE sqlite_master; + SELECT *, '#' FROM t1 WHERE a BETWEEN 3 AND 8 ORDER BY c; +} {4 5 6 # 7 8 9 # 4 8 12 #} +do_execsql_test 2.1 { + EXPLAIN QUERY PLAN + SELECT *, '#' FROM t1 WHERE a BETWEEN 3 AND 8 ORDER BY c; +} {~/.*USING INDEX.*/} +do_execsql_test 2.2 { + SELECT c FROM t1 ORDER BY a; +} {3 111 6 12 9 12} +do_execsql_test 2.3 { + EXPLAIN QUERY PLAN + SELECT c FROM t1 ORDER BY a; +} {~/.*USING INDEX.*/} +do_execsql_test 2.3x { + EXPLAIN QUERY PLAN + SELECT c FROM t1 ORDER BY a; +} {/.*B-TREE FOR ORDER BY.*/} + +# Ignore extraneous text parameters in the sqlite_stat1.stat field. +# +do_execsql_test 3.0 { + UPDATE sqlite_stat1 SET stat='12345 2 whatever=5 unordered xyzzy=11' + WHERE idx='t1a'; + ANALYZE sqlite_master; + SELECT *, '#' FROM t1 WHERE a BETWEEN 3 AND 8 ORDER BY c; +} {4 5 6 # 7 8 9 # 4 8 12 #} +do_execsql_test 3.1 { + EXPLAIN QUERY PLAN + SELECT *, '#' FROM t1 WHERE a BETWEEN 3 AND 8 ORDER BY c; +} {~/.*USING INDEX.*/} +do_execsql_test 3.2 { + SELECT c FROM t1 ORDER BY a; +} {3 111 6 12 9 12} +do_execsql_test 3.3 { + EXPLAIN QUERY PLAN + SELECT c FROM t1 ORDER BY a; +} {~/.*USING INDEX.*/} +do_execsql_test 3.3x { + EXPLAIN QUERY PLAN + SELECT c FROM t1 ORDER BY a; +} {/.*B-TREE FOR ORDER BY.*/} + +# The sz=NNN parameter determines which index to scan +# +do_execsql_test 4.0 { + DROP INDEX t1a; + CREATE INDEX t1ab ON t1(a,b); + CREATE INDEX t1ca ON t1(c,a); + DELETE FROM sqlite_stat1; + INSERT INTO sqlite_stat1(tbl,idx,stat) + VALUES('t1','t1ab','12345 3 2 sz=10'),('t1','t1ca','12345 3 2 sz=20'); + ANALYZE sqlite_master; + SELECT count(a) FROM t1; +} {6} +do_execsql_test 4.1 { + EXPLAIN QUERY PLAN + SELECT count(a) FROM t1; +} {/.*INDEX t1ab.*/} +do_execsql_test 4.2 { + DELETE FROM sqlite_stat1; + INSERT INTO sqlite_stat1(tbl,idx,stat) + VALUES('t1','t1ab','12345 3 2 sz=20'),('t1','t1ca','12345 3 2 sz=10'); + ANALYZE sqlite_master; + SELECT count(a) FROM t1; +} {6} +do_execsql_test 4.3 { + EXPLAIN QUERY PLAN + SELECT count(a) FROM t1; +} {/.*INDEX t1ca.*/} + +# 2019-08-15. +# Ticket https://www.sqlite.org/src/tktview/e4598ecbdd18bd82945f602901 +# The sz=N parameter in the sqlite_stat1 table needs to have a value of +# 2 or more to avoid a division by zero in the query planner. +# +do_execsql_test 4.4 { + DROP TABLE IF EXISTS t44; + CREATE TABLE t44(a PRIMARY KEY); + INSERT INTO sqlite_stat1 VALUES('t44',null,'sz=0'); + ANALYZE sqlite_master; + SELECT 0 FROM t44 WHERE a IN(1,2,3); +} {} + + + +# The sz=NNN parameter works even if there is other extraneous text +# in the sqlite_stat1.stat column. +# +do_execsql_test 5.0 { + DELETE FROM sqlite_stat1; + INSERT INTO sqlite_stat1(tbl,idx,stat) + VALUES('t1','t1ab','12345 3 2 x=5 sz=10 y=10'), + ('t1','t1ca','12345 3 2 whatever sz=20 junk'); + ANALYZE sqlite_master; + SELECT count(a) FROM t1; +} {6} +do_execsql_test 5.1 { + EXPLAIN QUERY PLAN + SELECT count(a) FROM t1; +} {/.*INDEX t1ab.*/} +do_execsql_test 5.2 { + DELETE FROM sqlite_stat1; + INSERT INTO sqlite_stat1(tbl,idx,stat) + VALUES('t1','t1ca','12345 3 2 x=5 sz=10 y=10'), + ('t1','t1ab','12345 3 2 whatever sz=20 junk'); + ANALYZE sqlite_master; + SELECT count(a) FROM t1; +} {6} +do_execsql_test 5.3 { + EXPLAIN QUERY PLAN + SELECT count(a) FROM t1; +} {/.*INDEX t1ca.*/} + + + + +finish_test |