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

Artifact 81e4a1fd010c903eb3b763fdb4c4cad7a99afb14:


#
#    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.
#
#***********************************************************************
#
# $Id: async2.test,v 1.3 2006/02/14 14:02:08 danielk1977 Exp $


if {[info commands sqlite3async_enable]==""} {
  # The async logic is not built into this system
  return
}

set testdir [file dirname $argv0]
source $testdir/tester.tcl

# Enable asynchronous IO.

set setup_script {
  CREATE TABLE counter(c);
  INSERT INTO counter(c) VALUES (1);
} 

set sql_script {
  BEGIN;
    UPDATE counter SET c = 2;
    CREATE TABLE t1(a PRIMARY KEY, b, c);
    CREATE TABLE t2(a PRIMARY KEY, b, c);
  COMMIT;

  BEGIN;
    UPDATE counter SET c = 3;
    INSERT INTO t1 VALUES('abcdefghij', 'four', 'score');
    INSERT INTO t2 VALUES('klmnopqrst', 'and', 'seven');
  COMMIT;

  UPDATE counter SET c = 'FIN';
}

db close


foreach err [list ioerr malloc] {
  set ::go 1
  for {set n 1} {$::go} {incr n} {
    set ::sqlite_io_error_pending 0
    sqlite_malloc_fail 0
    file delete -force test.db test.db-journal
    sqlite3 db test.db
    execsql $::setup_script
    db close
  
    sqlite3async_enable 1
    sqlite3 db test.db
    execsql $::sql_script
    db close
  
    switch -- $err {
      ioerr  { set ::sqlite_io_error_pending $n }
      malloc { sqlite_malloc_fail $n }
    }
    sqlite3async_halt idle
    sqlite3async_start
    sqlite3async_wait
  
    set ::sqlite_io_error_pending 0
    sqlite_malloc_fail 0

    sqlite3 db test.db
    set c [db eval {SELECT c FROM counter LIMIT 1}]
    switch -- $c {
      1 {
        do_test async-$err-1.1.$n {
          execsql {
            SELECT name FROM sqlite_master;
          }
        } {counter}
      }
      2 {
        do_test async-$err-1.2.$n.1 {
          execsql {
            SELECT * FROM t1;
          }
        } {}
        do_test async-$err-1.2.$n.2 {
          execsql {
            SELECT * FROM t2;
          }
        } {}
      }
      3 {
        do_test async-$err-1.3.$n.1 {
          execsql {
            SELECT * FROM t1;
          }
        } {abcdefghij four score}
        do_test async-$err-1.3.$n.2 {
          execsql {
            SELECT * FROM t2;
          }
        } {klmnopqrst and seven}
      }
      FIN {
        set ::go 0
      }
    }
  
    sqlite3async_enable 0
  }
}

catch {db close}
sqlite3async_halt idle
sqlite3async_start
sqlite3async_wait

finish_test