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Begin a branch that experimentally replaces sqlite_stat2 with a new table

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called sqlite_stat3 that will hopefully facilitate better query
planning decisions.

FossilOrigin-Name: 52e1d7e8ddd4bb5ef3a9d00fd2d719a8a784f807
This commit is contained in:
drh
2011-08-12 01:51:45 +00:00
parent 90315a2417
commit faacf17cc1
13 changed files with 714 additions and 455 deletions
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6
test/auth.test
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@@ -2324,7 +2324,11 @@ ifcapable compound&&subquery {
ifcapable stat2 {
set stat2 "sqlite_stat2 "
} else {
set stat2 ""
ifcapable stat3 {
set stat2 "sqlite_stat3 "
} else {
set stat2 ""
}
}
do_test auth-5.2 {
execsql {

56
test/stat3.test Normal file
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@@ -0,0 +1,56 @@
# 2011 August 08
#
# 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 implements regression tests for SQLite library. This file
# implements tests for the extra functionality provided by the ANALYZE
# command when the library is compiled with SQLITE_ENABLE_STAT2 defined.
#
set testdir [file dirname $argv0]
source $testdir/tester.tcl
set testprefix stat3
# Verify that if not compiled with SQLITE_ENABLE_STAT2 that the ANALYZE
# command will delete the sqlite_stat2 table. Likewise, if not compiled
# with SQLITE_ENABLE_STAT3, the sqlite_stat3 table is deleted.
#
do_test 1.1 {
db eval {
PRAGMA writable_schema=ON;
CREATE TABLE sqlite_stat2(tbl,idx,sampleno,sample);
CREATE TABLE sqlite_stat3(tbl,idx,sampleno,sample,neq,nlt);
SELECT name FROM sqlite_master ORDER BY 1;
}
} {sqlite_stat2 sqlite_stat3}
do_test 1.2 {
db close
sqlite3 db test.db
db eval {SELECT name FROM sqlite_master ORDER BY 1}
} {sqlite_stat2 sqlite_stat3}
ifcapable {stat3} {
do_test 1.3 {
db eval {ANALYZE; SELECT name FROM sqlite_master ORDER BY 1}
} {sqlite_stat1 sqlite_stat3}
} else {
do_test 1.4 {
db eval {ANALYZE; SELECT name FROM sqlite_master ORDER BY 1}
} {sqlite_stat1}
finish_test
return
}
finish_test