SQLite

/*
** 2003 April 6
**
** 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 contains code used to implement the ATTACH and DETACH commands.
**
** $Id: attach.c,v 1.8 2003/12/06 22:22:36 drh Exp $
*/
#include "sqliteInt.h"

/*
** This routine is called by the parser to process an ATTACH statement:
**
**     ATTACH DATABASE filename AS dbname

  rc = sqliteBtreeFactory(db, zFile, 0, MAX_PAGES, &aNew->pBt);
  if( rc ){
    sqliteErrorMsg(pParse, "unable to open database: %s", zFile);
  }
  sqliteFree(zFile);
  db->flags &= ~SQLITE_Initialized;
  if( pParse->nErr ) return;
  if( rc==SQLITE_OK ){
    rc = sqliteInit(pParse->db, &pParse->zErrMsg);
  }
  if( rc ){
    int i = db->nDb - 1;
    assert( i>=2 );
    if( db->aDb[i].pBt ){
      sqliteBtreeClose(db->aDb[i].pBt);
      db->aDb[i].pBt = 0;
    }
    sqliteResetInternalSchema(db, 0);
    pParse->nErr++;
    pParse->rc = SQLITE_ERROR;
  }
}

/*

#    May you share freely, never taking more than you give.
#
#***********************************************************************
# This file implements regression tests for SQLite library.  The
# focus of this script is testing the ATTACH and DETACH commands
# and related functionality.
#
# $Id: attach2.test,v 1.3 2003/12/06 22:22:37 drh Exp $
#


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

# Ticket #354
#
do_test attach2-1.1 {
  db eval {
    CREATE TABLE t1(a,b);
    CREATE INDEX x1 ON t1(a);
  }
  file delete -force test2.db
  file delete -force test2.db-journal
  sqlite db2 test2.db
  db2 eval {
    CREATE TABLE t1(a,b);
    CREATE INDEX x1 ON t1(a);
  }
  catchsql {
    ATTACH 'test2.db' AS t2;
  }
} {0 {}}

# Ticket #514
#
proc db_list {db} {
  set list {}
  foreach {idx name file} [execsql {PRAGMA database_list} $db] {
    lappend list $idx $name
  }
  return $list
}
db eval {DETACH t2}
do_test attach2-2.1 {
  # lock test2.db then try to attach it.  Should get an error.
  db2 eval {BEGIN}
  catchsql {
    ATTACH 'test2.db' AS t2;
  }
} {1 {database is locked}}
do_test attach2-2.2 {
  # make sure test2.db did not get attached.
  db_list db
} {0 main 1 temp}
do_test attach2-2.3 {
  # unlock test2.db and try to attach again.  should work this time.
  db2 eval {COMMIT}
  catchsql {
    ATTACH 'test2.db' AS t2;
  }
} {0 {}}
do_test attach2-2.4 {
  db_list db
} {0 main 1 temp 2 t2}
do_test attach2-2.5 {
  catchsql {
    SELECT name FROM t2.sqlite_master;
  }
} {0 {t1 x1}}
do_test attach2-2.6 {
  # lock test2.db and try to read from it.  should get an error.
  db2 eval BEGIN
  catchsql {
    SELECT name FROM t2.sqlite_master;
  }
} {1 {database is locked}}
do_test attach2-2.7 {
  # but we can still read from test1.db even though test2.db is locked.
  catchsql {
    SELECT name FROM main.sqlite_master;
  }
} {0 {t1 x1}}
do_test attach2-2.8 {
  # start a transaction on test.db even though test2.db is locked.
  catchsql {
    BEGIN;
    INSERT INTO t1 VALUES(8,9);
  }
} {0 {}}
do_test attach2-2.9 {
  execsql {
    SELECT * FROM t1
  }
} {8 9}
do_test attach2-2.10 {
  # now try to write to test2.db.  the write should fail
  catchsql {
    INSERT INTO t2.t1 VALUES(1,2);
  }
} {1 {database is locked}}
do_test attach2-2.11 {
  # when the write failed in the previous test, the transaction should
  # have rolled back.
  execsql {
    SELECT * FROM t1
  }
} {}
do_test attach2-2.12 {
  catchsql {
    COMMIT
  }
} {1 {cannot commit - no transaction is active}}

db close
for {set i 2} {$i<=15} {incr i} {
  catch {db$i close}
}
file delete -force test2.db


finish_test