SQLite

}

#---------------------------------------------------------------------------
# Run the dbstatus-2 and dbstatus-3 tests with several of different
# lookaside buffer sizes.
#
foreach ::lookaside_buffer_size {0 64 120} {

  # Do not run any of these tests if there is SQL configured to run
  # as part of the [sqlite3] command. This prevents the script from
  # configuring the size of the lookaside buffer after [sqlite3] has
  # returned.
  if {[presql] != ""} break

  #-------------------------------------------------------------------------
  # Tests for SQLITE_DBSTATUS_SCHEMA_USED.
  #
  # Each test in the following block works as follows. Each test uses a
  # different database schema.
  #

    # Tests for which the test name ends in an "x" report slightly less
    # memory than is actually freed when all statements are finalized.
    # This is because a small amount of memory allocated by a virtual table
    # implementation using sqlite3_mprintf() is technically considered
    # external and so is not counted as "statement memory".
    #
puts "$nStmt1 $nFree"
    if {[string match *x $tn]} {
      do_test dbstatus-3.$tn.bx { expr $nStmt1<=$nFree }  {1}
    } else {
      do_test dbstatus-3.$tn.b { expr $nStmt1==$nFree } {1}
    }

    do_test dbstatus-3.$tn.c { list $nAlloc1 $nStmt1 } [list $nAlloc3 $nStmt3]
    do_test dbstatus-3.$tn.d { list $nAlloc2 $nStmt2 } [list $nAlloc4 $nStmt4]
  }
}

finish_test

#
# We need to check this to verify that if in the unlikely event a rollback
# causes a database file to grow, the database grows to its previous size
# on disk, not to the minimum size required to hold the database image.
#
do_test fallocate-1.7 {
  execsql { BEGIN; INSERT INTO t1 VALUES(1, 2); }
  if {[permutation] != "inmemory_journal"} {
    hexio_get_int [hexio_read test.db-journal 16 4]
  } else {
    set {} 1024
  }
} {1024}
do_test fallocate-1.8 { execsql { COMMIT } } {}


#-------------------------------------------------------------------------
# The following tests - fallocate-2.* - test that things work in WAL
# mode as well.
#
set skipwaltests [expr {
  [permutation]=="journaltest" || [permutation]=="inmemory_journal"
}]
ifcapable !wal { set skipwaltests 1 }

if {!$skipwaltests} {
  db close
  file delete -force test.db
  sqlite3 db test.db
  file_control_chunksize_test db main [expr 32*1024]
  
  do_test fallocate-2.1 {
    execsql {
      PRAGMA page_size = 1024;
      PRAGMA journal_mode = WAL;
      CREATE TABLE t1(a, b);
    }
    file size test.db
  } [expr 32*1024]
  
  do_test fallocate-2.2 {
    execsql { INSERT INTO t1 VALUES(1, zeroblob(35*1024)) }
    execsql { PRAGMA wal_checkpoint }
    file size test.db
  } [expr 64*1024]
  
  do_test fallocate-2.3 {
    execsql { DELETE FROM t1 }
    execsql { VACUUM }
    file size test.db
  } [expr 64*1024]
  
  do_test fallocate-2.4 {
    execsql { PRAGMA wal_checkpoint }
    file size test.db
  } [expr 32*1024]
  
  do_test fallocate-2.5 {
    execsql { 
      INSERT INTO t1 VALUES(2, randomblob(35*1024));
      PRAGMA wal_checkpoint;
      INSERT INTO t1 VALUES(3, randomblob(128));
      DELETE FROM t1 WHERE a = 2;
      VACUUM;
    }
    file size test.db
  } [expr 64*1024]
  
  do_test fallocate-2.6 {
    sqlite3 db2 test.db
    execsql { BEGIN ; SELECT count(a) FROM t1 } db2
    execsql {  
      INSERT INTO t1 VALUES(4, randomblob(128));
      PRAGMA wal_checkpoint;
    }
    file size test.db
  } [expr 64*1024]
  
  do_test fallocate-2.7 {
    execsql { SELECT count(b) FROM t1 } db2
  } {1}
  
  do_test fallocate-2.8 {
    execsql { COMMIT } db2
    execsql { PRAGMA wal_checkpoint }
    file size test.db
  } [expr 32*1024]

}


finish_test