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Overview
Comment:Add further tests for rollback operations in the presence of ongoing selects.
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SHA1: eaf3aae014f59c8d37aa20aa31d54cf13f9e86fc
User & Date: dan 2014-11-12 17:45:37.113
Context
2014-11-13
14:18
Have calls to sqlite3_backup_init() fail if there is already a read or read-write transaction open on the destination database. (check-in: 169b550549 user: dan tags: trunk)
2014-11-12
17:45
Add further tests for rollback operations in the presence of ongoing selects. (check-in: eaf3aae014 user: dan tags: trunk)
14:56
When a transaction or savepoint rollback occurs, save the positions of all open read-cursors so that they can be restored following the rollback operation. (check-in: dd03a2802f user: dan tags: trunk)
Changes
Unified Diff Ignore Whitespace Patch
Changes to test/rollback2.test. 
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# 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












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# 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.
#
#***********************************************************************
#
# This file containst tests to verify that ROLLBACK or ROLLBACK TO 
# operations interact correctly with ongoing SELECT statements.
#

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;
} {}


# do_rollback_test ID SWITCHES
#
# where SWITCHES are:
#
#   -setup      SQL script to open transaction and begin writing.
#   -select     SELECT to execute after -setup script
#   -result     Expected result of -select statement
#   -rollback   Use this SQL command ("ROLLBACK" or "ROLLBACK TO ...") to
#               rollback the transaction in the middle of the -select statment
#               execution.
#
proc do_rollback_test {tn args} {
  set A(-setup)    ""
  set A(-select)   ""
  set A(-result)   ""
  set A(-rollback) ROLLBACK

  array set O $args
︙︙
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    }

    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









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    }

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

do_rollback_test 2.1 -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
}

do_rollback_test 2.2 -setup {
  BEGIN;
    DELETE FROM t1 WHERE (i%4)==1;
    SAVEPOINT one;
      DELETE FROM t1 WHERE (i%2)==1;
} -rollback {
  ROLLBACK TO one;
} -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
}

#--------------------------------------------------------------------
# Try with some index scans
#
do_eqp_test 3.1 {
  SELECT i FROM t1 WHERE (i%2)==0 ORDER BY h DESC;
} {0 0 0 {SCAN TABLE t1 USING INDEX i1}}
do_rollback_test 3.2 -setup {
  BEGIN;
    DELETE FROM t1 WHERE (i%2)==1;
} -select {
  SELECT i FROM t1 WHERE (i%2)==0 ORDER BY h DESC;
} -result {
  40 38 36 34 32 30 28 26 24 22 20 18 16 14 12 10  8  6  4  2
}
do_rollback_test 3.3 -setup {
  BEGIN;
    DELETE FROM t1 WHERE (i%4)==1;
    SAVEPOINT one;
      DELETE FROM t1 WHERE (i%2)==1;
} -rollback {
  ROLLBACK TO one;
} -select {
  SELECT i FROM t1 WHERE (i%2)==0 ORDER BY h DESC;
} -result {
  40 38 36 34 32 30 28 26 24 22 20 18 16 14 12 10  8  6  4  2
}

#--------------------------------------------------------------------
# Now with some index scans that feature overflow keys.
#
set leader [string repeat "abcdefghij" 70]
do_execsql_test 4.1 { UPDATE t1 SET h = $leader || h; }

do_eqp_test 4.2 {
  SELECT i FROM t1 WHERE (i%2)==0 ORDER BY h ASC;
} {0 0 0 {SCAN TABLE t1 USING INDEX i1}}
do_rollback_test 4.3 -setup {
  BEGIN;
    DELETE FROM t1 WHERE (i%2)==1;
} -select {
  SELECT i FROM t1 WHERE (i%2)==0 ORDER BY h ASC;
} -result {
  2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40
}
do_rollback_test 4.4 -setup {
  BEGIN;
    DELETE FROM t1 WHERE (i%4)==1;
    SAVEPOINT one;
      DELETE FROM t1 WHERE (i%2)==1;
} -rollback {
  ROLLBACK TO one;
} -select {
  SELECT i FROM t1 WHERE (i%2)==0 ORDER BY h ASC;
} -result {
  2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40
}

finish_test
Added test/rollbackfault.test. 










































































































































































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# 2014-11-12
#
# 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.
#
#***********************************************************************
#
# Test that errors encountered during a ROLLBACK operation correctly 
# affect ongoing SQL statements.
#

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


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;
} {}

foreach f {oom ioerr} {
  do_faultsim_test 1.2 -faults $f* -prep {
    set sql1 { SELECT i FROM t1 WHERE (i%2)==0 }
    set sql2 { SELECT i FROM t1 WHERE (i%2)==0 ORDER BY h }
    set ::s1 [sqlite3_prepare db $sql1 -1 dummy]
    set ::s2 [sqlite3_prepare db $sql2 -1 dummy]
  
    for {set i 0} {$i < 10} {incr i} { sqlite3_step $::s1 }
    for {set i 0} {$i < 3}  {incr i} { sqlite3_step $::s2 }
  
    execsql {
      BEGIN; DELETE FROM t1 WHERE (i%2)
    }
  } -body {
    execsql { ROLLBACK }
  } -test {
  
    set res1 [list]
    set res2 [list]
    while {"SQLITE_ROW" == [sqlite3_step $::s1]} {
      lappend res1 [sqlite3_column_text $::s1 0]
    }
    while {"SQLITE_ROW" == [sqlite3_step $::s2]} {
      lappend res2 [sqlite3_column_text $::s2 0]
    }
    set rc1 [sqlite3_finalize $::s1]
    set rc2 [sqlite3_finalize $::s2]
  
    catchsql { ROLLBACK }
  
    if {$rc1=="SQLITE_OK" && $rc2=="SQLITE_OK" 
     && $res1=="22 24 26 28 30 32 34 36 38 40"
     && $res2=="8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40"
    } {
      # This is Ok.
    } elseif {$rc1!="SQLITE_OK" && $rc2!="SQLITE_OK" && $res1=="" &&$res2==""} {
      # Also Ok.
    } else {
      error "statements don't look right"
    }
  }
}


finish_test