SQLite

**    May you share freely, never taking more than you give.
**
*************************************************************************
** Code for testing the virtual table interfaces.  This code
** is not included in the SQLite library.  It is used for automated
** testing of the SQLite library.
**
** $Id: test8.c,v 1.45 2007/03/30 14:56:35 danielk1977 Exp $
*/
#include "sqliteInt.h"
#include "tcl.h"
#include "os.h"
#include <stdlib.h>
#include <string.h>

#ifndef SQLITE_OMIT_VIRTUALTABLE

typedef struct echo_vtab echo_vtab;
typedef struct echo_cursor echo_cursor;

/*
** The test module defined in this file uses four global Tcl variables to
** commicate with test-scripts:
**
**     $::echo_module
**     $::echo_module_sync_fail
**     $::echo_module_begin_fail
**     $::echo_module_cost
**
** The variable ::echo_module is a list. Each time one of the following
** methods is called, one or more elements are appended to the list.
** This is used for automated testing of virtual table modules.
**
** The ::echo_module_sync_fail variable is set by test scripts and read
** by code in this file. If it is set to the name of a real table in the

  int ii;
  char *zQuery = 0;
  char *zNew;
  int nArg = 0;
  const char *zSep = "WHERE";
  echo_vtab *pVtab = (echo_vtab *)tab;
  sqlite3_stmt *pStmt = 0;
  Tcl_Interp *interp = pVtab->interp;

  int nRow;
  int useIdx = 0;
  int rc = SQLITE_OK;
  int useCost = 0;
  double cost;

  /* Determine the number of rows in the table and store this value in local
  ** variable nRow. The 'estimated-cost' of the scan will be the number of
  ** rows in the table for a linear scan, or the log (base 2) of the 
  ** number of rows if the proposed scan uses an index.  
  */
  if( Tcl_GetVar(interp, "echo_module_cost", TCL_GLOBAL_ONLY) ){
    cost = atof(Tcl_GetVar(interp, "echo_module_cost", TCL_GLOBAL_ONLY));
    useCost = 1;
  } else {
    zQuery = sqlite3_mprintf("SELECT count(*) FROM %Q", pVtab->zTableName);
    rc = sqlite3_prepare(pVtab->db, zQuery, -1, &pStmt, 0);
    sqlite3_free(zQuery);
    if( rc!=SQLITE_OK ){
      return rc;
    }
    sqlite3_step(pStmt);
    nRow = sqlite3_column_int(pStmt, 0);
    rc = sqlite3_finalize(pStmt);
    if( rc!=SQLITE_OK ){
      return rc;
    }
  }

  zQuery = sqlite3_mprintf("SELECT rowid, * FROM %Q", pVtab->zTableName);
  for(ii=0; ii<pIdxInfo->nConstraint; ii++){
    const struct sqlite3_index_constraint *pConstraint;
    struct sqlite3_index_constraint_usage *pUsage;
    int iCol;

  appendToEchoModule(pVtab->interp, "xBestIndex");;
  appendToEchoModule(pVtab->interp, zQuery);

  pIdxInfo->idxNum = hashString(zQuery);
  pIdxInfo->idxStr = zQuery;
  pIdxInfo->needToFreeIdxStr = 1;
  if (useCost) {
    pIdxInfo->estimatedCost = cost;
  } else if( useIdx ){
    /* Approximation of log2(nRow). */
    for( ii=0; ii<(sizeof(int)*8); ii++ ){
      if( nRow & (1<<ii) ){
        pIdxInfo->estimatedCost = (double)ii;
      }
    }
  } else {

** This module contains C code that generates VDBE code used to process
** the WHERE clause of SQL statements.  This module is reponsible for
** generating the code that loops through a table looking for applicable
** rows.  Indices are selected and used to speed the search when doing
** so is applicable.  Because this module is responsible for selecting
** indices, you might also think of this module as the "query optimizer".
**
** $Id: where.c,v 1.244 2007/03/30 14:56:35 danielk1977 Exp $
*/
#include "sqliteInt.h"

/*
** The number of bits in a Bitmask.  "BMS" means "BitMask Size".
*/
#define BMS  (sizeof(Bitmask)*8)

static void whereInfoFree(WhereInfo *pWInfo){
  if( pWInfo ){
    int i;
    for(i=0; i<pWInfo->nLevel; i++){
      sqlite3_index_info *pInfo = pWInfo->a[i].pIdxInfo;
      if( pInfo ){
        if( pInfo->needToFreeIdxStr ){
          /* Coverage: Don't think this can be reached. By the time this
          ** function is called, the index-strings have been passed
          ** to the vdbe layer for deletion.
          */
          sqlite3_free(pInfo->idxStr);
        }
        sqliteFree(pInfo);
      }
    }
    sqliteFree(pWInfo);
  }

# 2006 September 4
#
# 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 implements regression tests for SQLite library.
#
# $Id: misc7.test,v 1.6 2007/03/30 14:56:35 danielk1977 Exp $

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

do_test misc7-1 {
  c_misuse_test
} {}

    SELECT * 
    FROM (SELECT name+1 AS one FROM sqlite_master LIMIT 1 OFFSET 1) 
    WHERE one LIKE 'hello%';
  }
} {}

#--------------------------------------------------------------------
# Improve coverage for vtab code.
#
ifcapable vtab {
  # Run some debug code to improve reported coverage
  #

  # set sqlite_where_trace 1
  do_test misc7-10 {
    register_echo_module [sqlite3_connection_pointer db]
    execsql {
      CREATE VIRTUAL TABLE t1 USING echo(abc);
      SELECT a FROM t1 WHERE a = 1 ORDER BY b;
    }
  } {1}
  set sqlite_where_trace 0

  # Specify an ORDER BY clause that cannot be indexed.
  do_test misc7-11 {
    execsql {
      SELECT t1.a, t2.a FROM t1, t1 AS t2 ORDER BY 2 LIMIT 1;
    }
  } {1 1}

  # The whole point of this is to test an error code other than
  # SQLITE_NOMEM from the vtab xBestIndex callback.
  #
  do_ioerr_test misc7-12 -tclprep {
    sqlite3 db2 test.db
    register_echo_module [sqlite3_connection_pointer db2]
    db2 eval {
      CREATE TABLE abc(a PRIMARY KEY, b, c);
      INSERT INTO abc VALUES(1, 2, 3);
      CREATE VIRTUAL TABLE t1 USING echo(abc);
    }
    db2 close
  } -tclbody {
    register_echo_module [sqlite3_connection_pointer db]
    execsql {SELECT * FROM t1 WHERE a = 1;}
  } 

  # The case where the virtual table module returns a very large number
  # as the cost of a scan (greater than SQLITE_BIG_DOUBLE in the code).
  #
  do_test misc7-13 {
    sqlite3 db test.db
    register_echo_module [sqlite3_connection_pointer db]
    set ::echo_module_cost 2.0e+99
    execsql {SELECT * FROM t1 WHERE a = 1;}
  } {1 2 3}
  unset ::echo_module_cost
}


finish_test

# 2006 June 10
#
# 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 implements regression tests for SQLite library.  The
# focus of this file is creating and dropping virtual tables.
#
# $Id: vtab1.test,v 1.42 2007/03/30 14:56:35 danielk1977 Exp $

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

ifcapable !vtab||!schema_pragmas {
  finish_test
  return

    CREATE INDEX i1 ON t2(d);
  }

  db close
  sqlite3 db test.db
  register_echo_module [sqlite3_connection_pointer db]

  set ::echo_module ""
  execsql {
    SELECT * FROM et1, et2 WHERE et2.d = 2;
  }
} [list \
  1 red green 2 hearts diamonds  \
  2 blue black 2 hearts diamonds \
]
do_test vtab1-5-7 {
  filter $::echo_module
} [list \
  xFilter {SELECT rowid, * FROM 't2' WHERE d = ?} \
  xFilter {SELECT rowid, * FROM 't1'}             \
]

execsql {
  DROP TABLE t1;