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sqlite/test/concurrent9.test
2025-10-04 17:28:29 +00:00

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# 2023 January 12
#
# 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.
#
set testdir [file dirname $argv0]
source $testdir/tester.tcl
set testprefix concurrent9
do_execsql_test 1.0 {
CREATE TABLE t1(x);
INSERT INTO t1 VALUES(1), (2);
CREATE TABLE t2(y);
INSERT INTO t2 VALUES('a'), ('b');
PRAGMA journal_mode = wal;
} {wal}
db close
#-------------------------------------------------------------------------
# Fix a problem that may occur if a BEGIN CONCURRENT transaction is
# started when the wal file is completely empty and committed after
# it has been initialized by some other connection.
#
sqlite3 db test.db
sqlite3 db2 test.db
do_execsql_test -db db 1.1 {
BEGIN CONCURRENT;
INSERT INTO t2 VALUES('c');
}
do_execsql_test -db db2 1.2 {
INSERT INTO t1 VALUES(3);
}
do_execsql_test -db db 1.3 {
COMMIT;
}
do_execsql_test -db db2 1.4 {
SELECT * FROM t1;
SELECT * FROM t2;
} {1 2 3 a b c}
db2 close
#-------------------------------------------------------------------------
reset_db
do_execsql_test 2.1 {
CREATE TABLE t1(a INTEGER PRIMARY KEY, b);
PRAGMA journal_mode = wal;
WITH s(i) AS (
SELECT 1 UNION SELECT i+1 FROM s WHERE i<500
)
INSERT INTO t1(b) SELECT hex(randomblob(200)) FROM s;
PRAGMA page_count;
} {wal 255}
sqlite3 db2 test.db
do_execsql_test -db db2 2.2 {
DELETE FROM t1 WHERE a<100;
PRAGMA freelist_count;
} {49}
do_execsql_test 2.3 {
BEGIN CONCURRENT;
WITH s(i) AS (
SELECT 1 UNION SELECT i+1 FROM s WHERE i<100
)
INSERT INTO t1(b) SELECT hex(randomblob(200)) FROM s;
}
sqlite3_db_status db CACHE_MISS 1
do_execsql_test 2.4.1 {
COMMIT;
}
do_test 2.4.2 {
lindex [sqlite3_db_status db CACHE_MISS 0] 1
} {1}
do_execsql_test -db db2 2.5 {
DELETE FROM t1 WHERE a<200;
PRAGMA freelist_count;
} {50}
do_execsql_test 2.6 {
BEGIN CONCURRENT;
WITH s(i) AS (
SELECT 1 UNION SELECT i+1 FROM s WHERE i<100
)
INSERT INTO t1(b) SELECT hex(randomblob(200)) FROM s;
DELETE FROM t1 WHERE rowid BETWEEN 600 AND 680;
}
sqlite3_db_status db CACHE_MISS 1
do_execsql_test 2.7.1 {
COMMIT;
}
do_test 2.7.2 {
lindex [sqlite3_db_status db CACHE_MISS 0] 1
} {1}
do_execsql_test 2.8 {
PRAGMA integrity_check;
} {ok}
db2 close
#-------------------------------------------------------------------------
reset_db
do_execsql_test 3.0 {
PRAGMA journal_mode = wal2;
CREATE TABLE t1(a, b);
INSERT INTO t1 VALUES(1, 2);
} {wal2}
sqlite3 db2 test.db
do_execsql_test -db db2 3.1 {
BEGIN CONCURRENT;
UPDATE t1 SET b=3;
}
do_execsql_test 3.2 {
INSERT INTO t1 VALUES(3, 4);
}
do_test 3.3 {
list [catch { db2 eval COMMIT } msg] $msg
} {1 {database is locked}}
do_test 3.4 {
list [catch { db2 eval COMMIT } msg] $msg
} {1 {database is locked}}
db2 close
finish_test