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SQLite training in Houston TX on 2019-11-05 (details)
Part of the 2019 Tcl Conference

Artifact d371279946622698ab393ff88cad9f5f6d82960b:


# 2011 May 19
#
# 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. Specifically,
# it tests that ticket [2d1a5c67dfc2363e44f29d9bbd57f7331851390a] has
# been resolved.
#
# 
#

set testdir [file dirname $argv0]
source $testdir/tester.tcl
set testprefix tkt-2d1a5c67d

ifcapable {!wal || !vtab} {finish_test; return}

for {set ii 1} {$ii<=10} {incr ii} {
  do_test tkt-2d1a5c67d.1.$ii {
    db close
    forcedelete test.db test.db-wal
    sqlite3 db test.db
    db eval "PRAGMA cache_size=$::ii"
    db eval {
      PRAGMA journal_mode=WAL;
      CREATE TABLE t1(a,b);
      CREATE INDEX t1b ON t1(b);
      CREATE TABLE t2(x,y UNIQUE);
      INSERT INTO t2 VALUES(3,4);
      BEGIN;
      INSERT INTO t1(a,b) VALUES(1,2);
      SELECT 'A', * FROM t2 WHERE y=4;
      SELECT 'B', * FROM t1;
      COMMIT;
      SELECT 'C', * FROM t1;
    }
  } {wal A 3 4 B 1 2 C 1 2}
}

db close
forcedelete test.db test.db-wal
sqlite3 db test.db
load_static_extension db wholenumber
db eval {
  PRAGMA journal_mode=WAL;
  CREATE TABLE t1(a,b);
  CREATE INDEX t1b ON t1(b);
  CREATE TABLE t2(x,y);
  CREATE VIRTUAL TABLE nums USING wholenumber;
  INSERT INTO t2 SELECT value, randomblob(1000) FROM nums
                 WHERE value BETWEEN 1 AND 1000;
}

for {set ii 1} {$ii<=10} {incr ii} {
  do_test tkt-2d1a5c67d.2.$ii {
    db eval "PRAGMA cache_size=$::ii"
    db eval {
      DELETE FROM t1;
      BEGIN;
      INSERT INTO t1(a,b) VALUES(1,2);
      SELECT sum(length(y)) FROM t2;
      COMMIT;
      SELECT * FROM t1;
    }
  } {1000000 1 2}
}

db close
sqlite3 db test.db


do_execsql_test 3.1 {
  PRAGMA cache_size = 10;
  CREATE TABLE t3(a INTEGER PRIMARY KEY, b);
  CREATE TABLE t4(a);
}

do_execsql_test 3.2 {
  INSERT INTO t3 VALUES(NULL, randomblob(500));
  INSERT INTO t3 SELECT NULL, b||b FROM t3;     -- 2
  INSERT INTO t3 SELECT NULL, b||b FROM t3;     -- 4
  INSERT INTO t3 SELECT NULL, b||b FROM t3;     -- 8
  INSERT INTO t3 SELECT NULL, b||b FROM t3;     -- 16
  INSERT INTO t3 SELECT NULL, b||b FROM t3;     -- 32
  INSERT INTO t3 SELECT NULL, b||b FROM t3;     -- 64
  INSERT INTO t3 SELECT NULL, b||b FROM t3;     -- 128
}

do_execsql_test 3.3 {
  BEGIN;
    INSERT INTO t4 VALUES('xyz');
}

do_test 3.4 {
  set blobs [list]
  for {set i 1} {$i<100} {incr i} {
    set b [db incrblob -readonly t3 b $i]
    read $b
    lappend blobs $b
  }

  execsql COMMIT
  execsql { SELECT * FROM t4 WHERE a = 'xyz' }
} {xyz}

do_test 3.5 {
  foreach b $blobs { close $b }
  execsql { SELECT * FROM t4 WHERE a = 'xyz' }
} {xyz}

# Check that recovery works on the WAL file.
#
forcedelete test.db2-wal test.db2
do_test 3.6 {
  copy_file test.db-wal test.db2-wal
  copy_file test.db test.db2
  sqlite3 db2 test.db2
  execsql { SELECT * FROM t4 WHERE a = 'xyz' } db2
} {xyz}

finish_test