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

Artifact 552abaab8e721b6060a727d639896427059e51ec:


# 2014 November 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.
#
#***********************************************************************
#

set testdir [file dirname $argv0]
source $testdir/tester.tcl
set ::testprefix rollback2

proc int2hex {i} { format %.2X $i }
db func int2hex int2hex

do_execsql_test 1.0 {
  SELECT int2hex(0), int2hex(100), int2hex(255)
} {00 64 FF}
do_execsql_test 1.1 {
  CREATE TABLE t1(i, h);
  CREATE INDEX i1 ON t1(h);
  WITH data(a, b) AS (
    SELECT 1, int2hex(1)
      UNION ALL
    SELECT a+1, int2hex(a+1) FROM data WHERE a<40
  )
  INSERT INTO t1 SELECT * FROM data;
} {}


proc do_rollback_test {tn args} {
  set A(-setup)    ""
  set A(-select)   ""
  set A(-result)   ""
  set A(-rollback) ROLLBACK

  array set O $args
  foreach k [array names O] {
    if {[info exists A($k)]==0} { error "unknown option: $k" }
    set A($k) $O($k)
  }

  for {set iRollback 0} 1 {incr iRollback} {
    catch { db eval ROLLBACK }
    set res [list]
    db eval $A(-setup)

    set i 0
    db eval $A(-select) x {
      if {$i==$iRollback} { db eval $A(-rollback) }
      foreach k $x(*) { lappend res $x($k) }
      incr i
    }

    do_test $tn.$iRollback [list set {} $res] [list {*}$A(-result)]
    if {$i < $iRollback} break
  }
}

do_rollback_test 2 -setup {
  BEGIN;
    DELETE FROM t1 WHERE (i%2)==1;
} -select {
  SELECT i FROM t1 WHERE (i%2)==0
} -result {
  2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40
}

finish_test