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

Artifact 27cb5566a6e5f2d76f9d4aa2eca45524401fd61e:


# 2008 August 01
#
# 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 test script checks malloc failures in WHERE clause analysis.
# 
# $Id: mallocK.test,v 1.3 2009/01/08 21:00:03 drh Exp $

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

set sql {SELECT * FROM t1, t2 WHERE (a=1 OR a=2)}
for {set x 1} {$x<5} {incr x} {
  append sql " AND b=y"
  do_malloc_test mallocK-1.$x -sqlbody $sql -sqlprep {
    CREATE TABLE t1(a,b);
    CREATE TABLE t2(x,y);
  }
}

set sql {SELECT * FROM t1 WHERE a GLOB 'xyz*' AND (a=1 OR a=2)}
for {set x 1} {$x<5} {incr x} {
  append sql " AND b!=$x"
  do_malloc_test mallocK-2.$x -sqlbody $sql -sqlprep {
    CREATE TABLE t1(a,b);
  }
}

set sql {SELECT * FROM t1 WHERE a BETWEEN 5 AND 10}
for {set x 1} {$x<5} {incr x} {
  append sql " AND b=$x"
  do_malloc_test mallocK-3.$x -sqlbody $sql -sqlprep {
    CREATE TABLE t1(a,b);
  }
}

set sql {SELECT * FROM t1 WHERE b=0}
for {set x 1} {$x<5} {incr x} {
  set term "(b=$x"
  for {set y 0} {$y<$x} {incr y} {
    append term " AND a!=$y"
  }
  append sql " OR $term)"
  do_malloc_test mallocK-4.$x -sqlbody $sql -sqlprep {
    CREATE TABLE t1(a,b);
  }
}

ifcapable vtab {
  set sql {SELECT * FROM t2 WHERE a MATCH 'xyz'}
  for {set x 1} {$x<5} {incr x} {
    append sql " AND b!=$x"
    do_malloc_test mallocK-5.$x -sqlbody $sql -tclprep {
      register_echo_module [sqlite3_connection_pointer db]
      db eval {
        CREATE TABLE t1(a,b);
        CREATE VIRTUAL TABLE t2 USING echo(t1);
      }
    }
  }
}

#-------------------------------------------------------------------------
# Test that OOM errors are correctly handled by the code that uses stat4
# data to estimate the number of rows visited by a skip-scan range query.
#
add_alignment_test_collations db
do_execsql_test 6.0 {
  CREATE TABLE t3(a TEXT, b TEXT COLLATE utf16_aligned, c);
  INSERT INTO t3 VALUES('one', '.....', 0);
  INSERT INTO t3 VALUES('one', '....x', 1);
  INSERT INTO t3 VALUES('one', '...x.', 2);
  INSERT INTO t3 VALUES('one', '...xx', 3);
  INSERT INTO t3 VALUES('one', '..x..', 4);
  INSERT INTO t3 VALUES('one', '..x.x', 5);
  INSERT INTO t3 VALUES('one', '..xx.', 6);
  INSERT INTO t3 VALUES('one', '..xxx', 7);
  INSERT INTO t3 VALUES('one', '.x...', 8);
  INSERT INTO t3 VALUES('one', '.x..x', 9);
  INSERT INTO t3 VALUES('one', '.x.x.', 10);
  INSERT INTO t3 VALUES('one', '.x.xx', 11);
  INSERT INTO t3 VALUES('one', '.xx..', 12);
  INSERT INTO t3 VALUES('one', '.xx.x', 13);
  INSERT INTO t3 VALUES('one', '.xxx.', 14);
  INSERT INTO t3 VALUES('one', '.xxxx', 15);

  INSERT INTO t3 VALUES('two', 'x....', 16);
  INSERT INTO t3 VALUES('two', 'x...x', 17);
  INSERT INTO t3 VALUES('two', 'x..x.', 18);
  INSERT INTO t3 VALUES('two', 'x..xx', 19);
  INSERT INTO t3 VALUES('two', 'x.x..', 20);
  INSERT INTO t3 VALUES('two', 'x.x.x', 21);
  INSERT INTO t3 VALUES('two', 'x.xx.', 22);
  INSERT INTO t3 VALUES('two', 'x.xxx', 23);
  INSERT INTO t3 VALUES('two', 'xx...', 24);
  INSERT INTO t3 VALUES('two', 'xx..x', 25);
  INSERT INTO t3 VALUES('two', 'xx.x.', 26);
  INSERT INTO t3 VALUES('two', 'xx.xx', 27);
  INSERT INTO t3 VALUES('two', 'xxx..', 28);
  INSERT INTO t3 VALUES('two', 'xxx.x', 29);
  INSERT INTO t3 VALUES('two', 'xxxx.', 30);
  INSERT INTO t3 VALUES('two', 'xxxxx', 31);

  INSERT INTO t3 SELECT * FROM t3;

  CREATE INDEX i3 ON t3(a, b);
  ANALYZE;

  SELECT 'x' > '.';
} {1}

ifcapable stat4 {
  do_eqp_test 6.1 {
    SELECT DISTINCT c FROM t3 WHERE b BETWEEN '.xx..' AND '.xxxx';
  } {
    0 0 0 {SEARCH TABLE t3 USING INDEX i3 (ANY(a) AND b>? AND b<?)} 
    0 0 0 {USE TEMP B-TREE FOR DISTINCT}
  }
}

do_faultsim_test 6 -faults oom* -body {
  db cache flush
  db eval { SELECT DISTINCT c FROM t3 WHERE b BETWEEN '.xx..' AND '.xxxx' }
} -test {
  faultsim_test_result {0 {12 13 14 15}} 
}

do_execsql_test 7.1 {
  CREATE TABLE x1(a INTEGER PRIMARY KEY, b);
}
do_faultsim_test 7.2 -faults oom* -body {
  execsql { SELECT * FROM x1 WHERE a = (SELECT 1) }
} -test {
  faultsim_test_result [list 0 {}]
}

reset_db

proc isqrt {i} { expr { int(sqrt($i)) } }
db func isqrt isqrt

do_execsql_test 8.0 {
  PRAGMA encoding = 'utf-16';
  CREATE TABLE x2(x TEXT, y TEXT);
  WITH data(i) AS (
    SELECT 1 UNION ALL SELECT i+1 FROM data
  )
  INSERT INTO x2 SELECT isqrt(i), isqrt(i) FROM data LIMIT 400;
  CREATE INDEX x2x ON x2(x);
  CREATE INDEX x2y ON x2(y);
  ANALYZE;
  DELETE FROM x2;
}

proc str {a} { return $a }
db func str -deterministic str

do_faultsim_test 8 -faults oom* -body {
  execsql { SELECT * FROM x2 WHERE x = str('19') AND y = str('4') }
} -test {
  faultsim_test_result [list 0 {}]
}


finish_test