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# 2013 August 3
#
# 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 current build
# (which must be either ENABLE_STAT3 or ENABLE_STAT4) works with both stat3
# and stat4 data.
#
set testdir [file dirname $argv0]
source $testdir/tester.tcl
set testprefix analyzeA
ifcapable !stat4&&!stat3 {
finish_test
return
}
# Populate the stat3 table according to the current contents of the db
#
proc populate_stat3 {{bDropTable 1}} {
# Open a second connection on database "test.db" and run ANALYZE. If this
# is an ENABLE_STAT3 build, this is all that is required to create and
# populate the sqlite_stat3 table.
#
sqlite3 db2 test.db
execsql { ANALYZE }
# Now, if this is an ENABLE_STAT4 build, create and populate the
# sqlite_stat3 table based on the stat4 data gathered by the ANALYZE
# above. Then drop the sqlite_stat4 table.
#
ifcapable stat4 {
db2 func lindex lindex
execsql {
PRAGMA writable_schema = on;
CREATE TABLE sqlite_stat3(tbl,idx,neq,nlt,ndlt,sample);
INSERT INTO sqlite_stat3
SELECT DISTINCT tbl, idx,
lindex(neq,0), lindex(nlt,0), lindex(ndlt,0), test_extract(sample, 0)
FROM sqlite_stat4;
} db2
if {$bDropTable} { execsql {DROP TABLE sqlite_stat4} db2 }
execsql { PRAGMA writable_schema = off }
}
# Modify the database schema cookie to ensure that the other connection
# reloads the schema.
#
execsql {
CREATE TABLE obscure_tbl_nm(x);
DROP TABLE obscure_tbl_nm;
} db2
db2 close
}
# Populate the stat4 table according to the current contents of the db
#
proc populate_stat4 {{bDropTable 1}} {
sqlite3 db2 test.db
execsql { ANALYZE }
ifcapable stat3 {
execsql {
PRAGMA writable_schema = on;
CREATE TABLE sqlite_stat4(tbl,idx,neq,nlt,ndlt,sample);
INSERT INTO sqlite_stat4
SELECT tbl, idx, neq, nlt, ndlt, sqlite_record(sample)
FROM sqlite_stat3;
} db2
if {$bDropTable} { execsql {DROP TABLE sqlite_stat3} db2 }
execsql { PRAGMA writable_schema = off }
}
# Modify the database schema cookie to ensure that the other connection
# reloads the schema.
#
execsql {
CREATE TABLE obscure_tbl_nm(x);
DROP TABLE obscure_tbl_nm;
} db2
db2 close
}
# Populate the stat4 table according to the current contents of the db.
# Leave deceptive data in the stat3 table. This data should be ignored
# in favour of that from the stat4 table.
#
proc populate_both {} {
ifcapable stat4 { populate_stat3 0 }
ifcapable stat3 { populate_stat4 0 }
sqlite3 db2 test.db
execsql {
PRAGMA writable_schema = on;
UPDATE sqlite_stat3 SET idx =
CASE idx WHEN 't1b' THEN 't1c' ELSE 't1b'
END;
PRAGMA writable_schema = off;
CREATE TABLE obscure_tbl_nm(x);
DROP TABLE obscure_tbl_nm;
} db2
db2 close
}
foreach {tn analyze_cmd} {
1 populate_stat4
2 populate_stat3
3 populate_both
} {
reset_db
do_test 1.$tn.1 {
execsql { CREATE TABLE t1(a INTEGER PRIMARY KEY, b, c) }
for {set i 0} {$i < 100} {incr i} {
set c [expr int(pow(1.1,$i)/100)]
set b [expr 125 - int(pow(1.1,99-$i))/100]
execsql {INSERT INTO t1 VALUES($i, $b, $c)}
}
} {}
execsql { CREATE INDEX t1b ON t1(b) }
execsql { CREATE INDEX t1c ON t1(c) }
$analyze_cmd
do_execsql_test 1.$tn.2.1 { SELECT count(*) FROM t1 WHERE b=31 } 1
do_execsql_test 1.$tn.2.2 { SELECT count(*) FROM t1 WHERE c=0 } 49
do_execsql_test 1.$tn.2.3 { SELECT count(*) FROM t1 WHERE b=125 } 49
do_execsql_test 1.$tn.2.4 { SELECT count(*) FROM t1 WHERE c=16 } 1
do_eqp_test 1.$tn.2.5 {
SELECT * FROM t1 WHERE b = 31 AND c = 0;
} {0 0 0 {SEARCH TABLE t1 USING INDEX t1b (b=?)}}
do_eqp_test 1.$tn.2.6 {
SELECT * FROM t1 WHERE b = 125 AND c = 16;
} {0 0 0 {SEARCH TABLE t1 USING INDEX t1c (c=?)}}
do_execsql_test 1.$tn.3.1 {
SELECT count(*) FROM t1 WHERE b BETWEEN 0 AND 50
} {6}
do_execsql_test 1.$tn.3.2 {
SELECT count(*) FROM t1 WHERE c BETWEEN 0 AND 50
} {90}
do_execsql_test 1.$tn.3.3 {
SELECT count(*) FROM t1 WHERE b BETWEEN 75 AND 125
} {90}
do_execsql_test 1.$tn.3.4 {
SELECT count(*) FROM t1 WHERE c BETWEEN 75 AND 125
} {6}
do_eqp_test 1.$tn.3.5 {
SELECT * FROM t1 WHERE b BETWEEN 0 AND 50 AND c BETWEEN 0 AND 50
} {0 0 0 {SEARCH TABLE t1 USING INDEX t1b (b>? AND b<?)}}
do_eqp_test 1.$tn.3.6 {
SELECT * FROM t1 WHERE b BETWEEN 75 AND 125 AND c BETWEEN 75 AND 125
} {0 0 0 {SEARCH TABLE t1 USING INDEX t1c (c>? AND c<?)}}
}
finish_test
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