**    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 help implement virtual tables.
**
** $Id: vtab.c,v 1.40 2007/04/16 15:06:26 danielk1977 Exp $
*/
#ifndef SQLITE_OMIT_VIRTUALTABLE
#include "sqliteInt.h"

/*
** External API function used to create a new virtual-table module.
*/
................................................................................
  Parse *pParse,        /* Parsing context */
  Token *pName1,        /* Name of new table, or database name */
  Token *pName2,        /* Name of new table or NULL */
  Token *pModuleName    /* Name of the module for the virtual table */
){
  int iDb;              /* The database the table is being created in */
  Table *pTable;        /* The new virtual table */






  sqlite3StartTable(pParse, pName1, pName2, 0, 0, 1, 0);
  pTable = pParse->pNewTable;
  if( pTable==0 || pParse->nErr ) return;
  assert( 0==pTable->pIndex );

  iDb = sqlite3SchemaToIndex(pParse->db, pTable->pSchema);

**    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 help implement virtual tables.
**
** $Id: vtab.c,v 1.41 2007/04/16 15:49:41 danielk1977 Exp $
*/
#ifndef SQLITE_OMIT_VIRTUALTABLE
#include "sqliteInt.h"

/*
** External API function used to create a new virtual-table module.
*/
................................................................................
  Parse *pParse,        /* Parsing context */
  Token *pName1,        /* Name of new table, or database name */
  Token *pName2,        /* Name of new table or NULL */
  Token *pModuleName    /* Name of the module for the virtual table */
){
  int iDb;              /* The database the table is being created in */
  Table *pTable;        /* The new virtual table */

  if( sqlite3ThreadDataReadOnly()->useSharedData ){
    sqlite3ErrorMsg(pParse, "Cannot use virtual tables in shared-cache mode");
    return;
  }

  sqlite3StartTable(pParse, pName1, pName2, 0, 0, 1, 0);
  pTable = pParse->pNewTable;
  if( pTable==0 || pParse->nErr ) return;
  assert( 0==pTable->pIndex );

  iDb = sqlite3SchemaToIndex(pParse->db, pTable->pSchema);

# 2007 April 16
#
# 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 tests interactions between the virtual table and
# shared-schema functionality.
#
# $Id: vtab_shared.test,v 1.1 2007/04/16 15:49:42 danielk1977 Exp $

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

ifcapable !vtab||!shared_cache {
  finish_test
  return
}

db close
sqlite3_enable_shared_cache 1
sqlite3 db test.db

do_test vtab_shared-1.0 {
  register_echo_module [sqlite3_connection_pointer db]
  catchsql {
    CREATE TABLE t0(a, b, c);
    CREATE VIRTUAL TABLE t1 USING echo(t0);
  }
} {1 {Cannot use virtual tables in shared-cache mode}}

db close
sqlite3_enable_shared_cache 0
sqlite3 db test.db

do_test vtab_shared-1.1 {
  register_echo_module [sqlite3_connection_pointer db]
  catchsql {
    CREATE VIRTUAL TABLE t1 USING echo(t0);
  }
} {0 {}}

db close
sqlite3_enable_shared_cache 1
sqlite3 db test.db

do_test vtab_shared-1.2 {
  register_echo_module [sqlite3_connection_pointer db]
  catchsql {
    SELECT * FROM t1;
  }
} [list 1 \
  {malformed database schema - Cannot use virtual tables in shared-cache mode}]

db close
sqlite3_enable_shared_cache 0
finish_test