SQLite

Artifact 06fd0b5294586d170a3b12d68153394fbfe642c8346e249a6240bc6ababc5f4b:

• File test/concurrent5.test — part of check-in [92618492b0] at 2017-05-29 14:27:37 on branch begin-concurrent — Enhance the log messages emitted when a page conflict is detected. (user: dan size: 2205)

# 2017 May 26
#
# 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.
#
#***********************************************************************
#
#

set testdir [file dirname $argv0]
source $testdir/tester.tcl
source $testdir/lock_common.tcl
source $testdir/wal_common.tcl
set ::testprefix concurrent5

ifcapable !concurrent {
  finish_test
  return
}

db close
sqlite3_shutdown
test_sqlite3_log [list lappend ::log]
set ::log [list]

sqlite3 db test.db

proc do_test_conflict_msg {tn msg} {
  set msg "cannot commit CONCURRENT transaction - [string trim $msg]"
  uplevel [list do_test $tn {lindex $::log end} $msg]
}

do_execsql_test 1.0 {
  PRAGMA journal_mode = wal;
  CREATE TABLE t1(x, y);
  CREATE TABLE t2(c);
  WITH s(i) AS (SELECT 1 UNION ALL SELECT i+1 FROM s WHERE i<100)
  INSERT INTO t1 SELECT randomblob(400), randomblob(400) FROM s;
} {wal}

sqlite3 db2 test.db

do_test 1.1.1 {
  set ::log [list]
  db2 eval {
    BEGIN CONCURRENT;
      SELECT count(*) FROM t1;
      INSERT INTO t2 VALUES(10);
  }

  db eval {
    INSERT INTO t1 VALUES(randomblob(200), randomblob(200));
  }

  catchsql COMMIT db2
} {1 {database is locked}}
do_test_conflict_msg 1.1.2 {
  conflict at page 2 (read-only page; part of b-tree with root page 2)
}

do_test 1.2.1 {
  set ::log [list]
  db2 eval {
    ROLLBACK;
    BEGIN CONCURRENT;
      INSERT INTO t1 VALUES(11, 12);
  }

  db eval {
    INSERT INTO t1 VALUES(12, 11);
  }

  catchsql COMMIT db2
} {1 {database is locked}}

do_test_conflict_msg 1.2.2 {
  conflict at page 105 (read/write page; part of b-tree with root page 2)
}

do_test 1.3.1 {
  set ::log [list]
  db2 eval {
    ROLLBACK;
    BEGIN CONCURRENT;
      INSERT INTO t2 VALUES('x');
  }

  db eval {
    INSERT INTO t2 VALUES('y');
  }

  catchsql COMMIT db2
} {1 {database is locked}}

do_test_conflict_msg 1.3.2 {
  conflict at page 3 (read/write page; part of b-tree with root page 3)
}

db close
db2 close
sqlite3_shutdown
test_sqlite3_log 
sqlite3_initialize
finish_test