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

Artifact 69c8fdbef830cd0d450908d4504d5bb86609e255af99c421c20a0756251fe344:


# 2014 June 17
#
# 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 is focused on OOM errors.
#

source [file join [file dirname [info script]] fts5_common.tcl]
source $testdir/malloc_common.tcl
set testprefix fts5fault2

# If SQLITE_ENABLE_FTS5 is not defined, omit this file.
ifcapable !fts5 {
  finish_test
  return
}

set doc [string trim [string repeat "x y z " 200]]
do_execsql_test 1.0 {
  CREATE TABLE t1(a INTEGER PRIMARY KEY, x);
  CREATE VIRTUAL TABLE x1 USING fts5(x, content='t1', content_rowid='a');
  INSERT INTO x1(x1, rank) VALUES('pgsz', 32);
  WITH input(a,b) AS (
    SELECT 1, $doc UNION ALL
    SELECT a+1, ($doc || CASE WHEN (a+1)%100 THEN '' ELSE ' xyz' END) 
    FROM input WHERE a < 1000
  )
  INSERT INTO t1 SELECT * FROM input;

  INSERT INTO x1(x1) VALUES('rebuild');
}

do_faultsim_test 1.1 -faults oom-* -prep {
} -body {
  execsql { SELECT rowid FROM x1 WHERE x1 MATCH 'z AND xyz' }
} -test {
  faultsim_test_result {0 {100 200 300 400 500 600 700 800 900 1000}}
}

do_faultsim_test 1.2 -faults oom-* -prep {
} -body {
  execsql { SELECT rowid FROM x1 WHERE x1 MATCH 'z + xyz' ORDER BY 1 DESC}
} -test {
  faultsim_test_result {0 {1000 900 800 700 600 500 400 300 200 100}}
}

#-------------------------------------------------------------------------
# OOM within a query that accesses the in-memory hash table. 
#
reset_db 
do_execsql_test 2.0 {
  CREATE VIRTUAL TABLE "a b c" USING fts5(a, b, c);
  INSERT INTO "a b c" VALUES('one two', 'x x x', 'three four');
  INSERT INTO "a b c" VALUES('nine ten', 'y y y', 'two two');
}

do_faultsim_test 2.1 -faults oom-trans* -prep {
  execsql {
    BEGIN;
      INSERT INTO "a b c" VALUES('one one', 'z z z', 'nine ten');
  }
} -body {
  execsql { SELECT rowid FROM "a b c" WHERE "a b c" MATCH 'one' }
} -test {
  faultsim_test_result {0 {1 3}}
  catchsql { ROLLBACK }
}

#-------------------------------------------------------------------------
# OOM within an 'optimize' operation that writes multiple pages to disk.
#
reset_db 
do_execsql_test 3.0 {
  CREATE VIRTUAL TABLE zzz USING fts5(z);
  INSERT INTO zzz(zzz, rank) VALUES('pgsz', 32);
  INSERT INTO zzz VALUES('a b c d');
  INSERT INTO zzz SELECT 'c d e f' FROM zzz;
  INSERT INTO zzz SELECT 'e f g h' FROM zzz;
  INSERT INTO zzz SELECT 'i j k l' FROM zzz;
  INSERT INTO zzz SELECT 'l k m n' FROM zzz;
  INSERT INTO zzz SELECT 'o p q r' FROM zzz;
}
faultsim_save_and_close

do_faultsim_test 3.1 -faults oom-trans* -prep {
  faultsim_restore_and_reopen
  execsql { SELECT rowid FROM zzz }
} -body {
  execsql { INSERT INTO zzz(zzz) VALUES('optimize') }
} -test {
  faultsim_test_result {0 {}}
}

#-------------------------------------------------------------------------
# OOM within an 'integrity-check' operation.
#
reset_db 
db func rnddoc fts5_rnddoc
do_execsql_test 4.0 {
  CREATE VIRTUAL TABLE zzz USING fts5(z);
  INSERT INTO zzz(zzz, rank) VALUES('pgsz', 32);
  WITH ii(i) AS (SELECT 1 UNION SELECT i+1 FROM ii WHERE i<10)
  INSERT INTO zzz SELECT rnddoc(10) || ' xccc' FROM ii;
}

do_faultsim_test 4.1 -faults oom-trans* -prep {
} -body {
  execsql { INSERT INTO zzz(zzz) VALUES('integrity-check') }
} -test {
  faultsim_test_result {0 {}}
}

#-------------------------------------------------------------------------
# OOM while parsing a tokenize=option
#
reset_db
faultsim_save_and_close
do_faultsim_test 5.0 -faults oom-* -prep {
  faultsim_restore_and_reopen
} -body {
  execsql { 
    CREATE VIRTUAL TABLE uio USING fts5(a, b, 
      tokenize="porter 'ascii'",
      content="another table",
      content_rowid="somecolumn"
    );
  }
} -test {
  faultsim_test_result {0 {}}
}

finish_test