Adding upstream version 1.37.0.
Signed-off-by: Daniel Baumann <daniel@debian.org>
This commit is contained in:
parent
42613ad5c6
commit
271b368104
1329 changed files with 4727104 additions and 0 deletions
50
testdata/tcl/emptytable.test
vendored
Normal file
50
testdata/tcl/emptytable.test
vendored
Normal file
|
@ -0,0 +1,50 @@
|
|||
# 2017-02-15
|
||||
#
|
||||
# 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.
|
||||
#
|
||||
#***********************************************************************
|
||||
#
|
||||
# Test cases to show that a join involving an empty table is very fast.
|
||||
#
|
||||
|
||||
set testdir [file dirname $argv0]
|
||||
source $testdir/tester.tcl
|
||||
|
||||
# Build some test data
|
||||
#
|
||||
do_execsql_test emptytable-100 {
|
||||
CREATE TABLE t1(a);
|
||||
WITH RECURSIVE c(x) AS (VALUES(1) UNION ALL SELECT x+1 FROM c WHERE x<100)
|
||||
INSERT INTO t1(a) SELECT x FROM c;
|
||||
CREATE TABLE empty(x);
|
||||
SELECT count(*) FROM t1;
|
||||
} {100}
|
||||
|
||||
# Interrupt queries after 1M cycles to prevent burning excess CPU
|
||||
proc stopDb {args} {
|
||||
db interrupt
|
||||
}
|
||||
db progress 1000000 {stopDb}
|
||||
|
||||
# Prior to the query planner optimization on 2017-02-15, this query would
|
||||
# take a ridiculous amount of time. If that optimization stops working,
|
||||
# the result here will be in interrupt for running too long.
|
||||
#
|
||||
do_catchsql_test emptytable-110 {
|
||||
SELECT count(*) FROM t1, t1, t1, t1, t1, t1, empty;
|
||||
} {0 0}
|
||||
|
||||
do_catchsql_test emptytable-120 {
|
||||
SELECT count(*) FROM t1, t1 LEFT JOIN empty;
|
||||
} {0 10000}
|
||||
do_catchsql_test emptytable-121 {
|
||||
SELECT count(*) FROM t1, t1 LEFT JOIN t1, empty;
|
||||
} {0 0}
|
||||
|
||||
|
||||
finish_test
|
Loading…
Add table
Add a link
Reference in a new issue