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

Artifact da2f9e3e56ff5740d68ebdd6877c97089e7ed28ddff28a0da87a6afea27e5522:


# 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 fts5fault3

# If SQLITE_ENABLE_FTS3 is defined, omit this file.
ifcapable !fts5 {
  finish_test
  return
}

#-------------------------------------------------------------------------
# An OOM while resuming a partially completed segment merge.
#
db func rnddoc fts5_rnddoc 
do_test 1.0 {
  expr srand(0)
  execsql {
    CREATE VIRTUAL TABLE xx USING fts5(x);
    INSERT INTO xx(xx, rank) VALUES('pgsz', 32);
    INSERT INTO xx(xx, rank) VALUES('automerge', 16);
  }
  for {set i 0} {$i < 10} {incr i} {
    execsql {
      BEGIN;
        INSERT INTO xx(x) VALUES(rnddoc(20));
        INSERT INTO xx(x) VALUES(rnddoc(20));
        INSERT INTO xx(x) VALUES(rnddoc(20));
      COMMIT
    }
  }

  execsql {
    INSERT INTO xx(xx, rank) VALUES('automerge', 2);
    INSERT INTO xx(xx, rank) VALUES('merge', 50);
  }
} {}
faultsim_save_and_close

do_faultsim_test 1 -faults oom-* -prep {
  faultsim_restore_and_reopen
} -body {
  execsql { INSERT INTO xx(xx, rank) VALUES('merge', 1) }
} -test {
  faultsim_test_result [list 0 {}]
}

#-------------------------------------------------------------------------
# An OOM while flushing an unusually large term to disk.
#
reset_db
do_execsql_test 2.0 {
  CREATE VIRTUAL TABLE xx USING fts5(x);
  INSERT INTO xx(xx, rank) VALUES('pgsz', 32);
}
faultsim_save_and_close

set    doc "a long term abcdefghijklmnopqrstuvwxyz "
append doc "and then abcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyz "
append doc [string repeat "abcdefghijklmnopqrstuvwxyz" 10]

do_faultsim_test 2 -faults oom-* -prep {
  faultsim_restore_and_reopen
} -body {
  execsql { INSERT INTO xx(x) VALUES ($::doc) }
} -test {
  faultsim_test_result [list 0 {}]
}

#-------------------------------------------------------------------------
# An OOM while flushing an unusually large term to disk.
#
reset_db
do_execsql_test 3.0 {
  CREATE VIRTUAL TABLE xx USING fts5(x);
}
faultsim_save_and_close

set doc [fts5_rnddoc 1000]
do_faultsim_test 3.1 -faults oom-* -prep {
  faultsim_restore_and_reopen
} -body {
  execsql { INSERT INTO xx(x) VALUES ($::doc) }
} -test {
  faultsim_test_result [list 0 {}]
}

set doc [string repeat "abc " 100]
do_faultsim_test 3.2 -faults oom-* -prep {
  faultsim_restore_and_reopen
} -body {
  execsql { INSERT INTO xx(x) VALUES ($::doc) }
} -test {
  faultsim_test_result [list 0 {}]
}



finish_test