Library /lib/yadal/class.MSSQL.php

Language PHP Lines 582
MD5 Hash 66e363a856180134a5a8e5acab6422bf
Repository https://github.com/reshadf/Library.git View Raw File
  1
  2
  3
  4
  5
  6
  7
  8
  9
 10
 11
 12
 13
 14
 15
 16
 17
 18
 19
 20
 21
 22
 23
 24
 25
 26
 27
 28
 29
 30
 31
 32
 33
 34
 35
 36
 37
 38
 39
 40
 41
 42
 43
 44
 45
 46
 47
 48
 49
 50
 51
 52
 53
 54
 55
 56
 57
 58
 59
 60
 61
 62
 63
 64
 65
 66
 67
 68
 69
 70
 71
 72
 73
 74
 75
 76
 77
 78
 79
 80
 81
 82
 83
 84
 85
 86
 87
 88
 89
 90
 91
 92
 93
 94
 95
 96
 97
 98
 99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
<?php
/**
 * Yadal interface for the MSSQL (Microsoft SQL Server) Database type
 *
 * @package Yadal
 */


/**
 * class MSSQL
 *
 * Yadal - Yet Another Database Abstraction Layer
 * Microsoft SQL Server (MSSQL) class
 *
 * @author Teye Heimans
 * @package Yadal
 */
class MSSQL extends Yadal
{

    /**
     * MSSQL::MSSQL()
     *
     * Constructor
     *
     * @author Teye Heimans
     */
    function MSSQL( $db )
    {
        $this->Yadal( $db );
        $this->_nameQuote = array('[',']');
    }

    /**
     * MSSQL::connect()
     *
     * Make a connection with the database and
     * select the database.
     *
     * @param string $servername: the server to connect to
     * @param string $username: the username which should be used to login
     * @param string $password: the password which should be used to login
     * @return resource: The connection resource or false on failure
     * @access public
     * @author Teye Heimans
     */
    function connect( $servername = '', $username = '', $password = '' )
    {
    	// try to connect
    	$this->_conn = mssql_connect( $servername, $username, $password );
    	if( ! $this->_conn )
    	{
    		return false;
    	}

    	// select the database
    	if( mssql_select_db( $this->_db, $this->_conn ) )
    	{
	    	$this->_isConnected = true;

	    	// return the connection resource
	        return $this->_conn;
    	}

    	return false;
    }

    /**
     * MSSQL::close()
     *
     * Close the connection
     *
     * @return bool
     * @access public
     * @author Teye Heimans
     */
    function close()
    {
        if( $this->_isConnected )
        {
            $this->_isConnected = false;
            return mssql_close( $this->_conn );
        }
    }

    /**
     * MSSQL::query()
     *
     * Execute the query
     *
     * @param string $query: the query
     * @return resource
     * @access public
     * @author Teye Heimans
     */
    function query( $query )
    {
    	$this->_lastQuery = $query;

    	// execute the query
        $sql =  mssql_query( $query );

        return $sql;
    }

    /**
     * MSSQL::result()
     *
     * Return a specific result of a sql resource
     *
     * @param resource $result: The sql result where you want to get a result from
     * @param int $row: The row where you want a result from
     * @param string $field: The field which result you want
     * @return string
     * @access public
     * @author Teye Heimans
     */
    function result( $result, $row = 0, $field = null )
    {
    	return mssql_result( $result, $row, $field);
    }

    /**
     * MSSQL::getInsertId()
     *
     * Get the id of the last inserted record
     *
     * @param string $table: the table which last inserted id should be returned from
     * @return int
     * @access public
     * @author Teye Heimans
     */
    function getInsertId( $table )
    {
    	$sql = mssql_query( "SELECT IDENT_CURRENT('".$table."')" );

    	if( $sql )
    	{
    		list($id) = mssql_fetch_row($sql);

       		return $id;
    	}
    	else
    	{
    		trigger_error(
    		  "Could not fetch the last inserted id for the table '".$table."'.\n".
    		  "Query: ".$this->getLastQuery()."\n".
    		  "Error: ".$this->getError(),
    		  E_USER_WARNING
    		);

    		return false;
    	}
    }

    /**
     * MSSQL::getError()
     *
     * Return the last error
     *
     * @return string
     * @access public
     * @author Teye Heimans
     */
    function getError()
    {
    	$error = mssql_get_last_message();
		if ($error == '')
		{
			$error = "General Error (The MS-SQL interface did not return a detailed error message).";
		}

        return $error;
    }

    /**
     * MSSQL::recordCount()
     *
     * Return the number of records found by the query
     *
     * @param resource $sql: the sql resource which we should count
     * @return int
     * @access public
     * @author Teye Heimans
     */
    function recordCount( $sql)
    {
        return mssql_num_rows( $sql );
    }

    /**
     * MSSQL::getRecord()
     *
     * Fetch a record in assoc mode and return it
     *
     * @return assoc array or false when there are no records left
     * @access public
     * @author Teye Heimans
     */
    function getRecord( $sql )
    {
        return mssql_fetch_assoc( $sql );
    }

    /**
     * MSSQL::getFieldNames()
     *
     * Return the field names of the table
     *
     * @param string $table: if a table is given, this one is used. otherwise the default is used
     * @return array
     * @access public
     * @author Teye Heimans
     */
    function getFieldNames( $table )
    {
        $t = strtolower($table);

        // return the data from the cache if it exists
        if( isset( $this->_cache['fields'][$t] ) )
        {
            return $this->_cache['fields'][$t];
        }

        // get the field names
    	$sql = $this->query("
    	  SELECT column_name fld
    	  FROM information_schema.columns
          WHERE table_name = '".$table."'
          ORDER BY ordinal_position"
    	);

    	// query failed ?
		if( ! $sql )
		{
			trigger_error(
    		  "Could not fetch fieldnames of the table '".$table."'.\n".
    		  "Query: ".$this->getLastQuery()."\n".
    		  "Error: ".$this->getError(),
    		  E_USER_WARNING
    		);
    		return false;
		}

		// save the fields in an array and return it
		$result = array();
		while ( $row = $this->getRecord( $sql) )
		{
			$result[] = $row['fld'];
		}

		mssql_free_result($sql);

		// save the result in the cache
        $this->_cache['fields'][$t] = $result;

		return $result;
    }

    /**
     * MSSQL::getTables()
     *
     * Return the tables from the database
     *
     * @param bool $showViews: should we also return the views ? (default true )
     * @return array
     * @access public
     * @author Teye Heimans
     */
    function getTables($showViews = true)
    {
        // return the data from the cache if it exists
        if( isset( $this->_cache['tables'] ) )
        {
            return $this->_cache['tables'];
        }

        $sql = $this->query("
          SELECT name
          FROM sysobjects
          WHERE type='U' ".($showViews ? " OR type='V' ":"")." AND
          (name not in
            ('sysallocations','syscolumns','syscomments','sysdepends',
             'sysfilegroups','sysfiles','sysfiles1','sysforeignkeys','dtproperties',
             'sysfulltextcatalogs','sysindexes','sysindexkeys','sysmembers',
             'sysobjects','syspermissions','sysprotects','sysreferences',
             'systypes','sysusers','sysalternates','sysconstraints',
             'syssegments','REFERENTIAL_CONSTRAINTS','CHECK_CONSTRAINTS',
             'CONSTRAINT_TABLE_USAGE','CONSTRAINT_COLUMN_USAGE','VIEWS',
             'VIEW_TABLE_USAGE','VIEW_COLUMN_USAGE','SCHEMATA','TABLES',
             'TABLE_CONSTRAINTS','TABLE_PRIVILEGES','COLUMNS',
             'COLUMN_DOMAIN_USAGE','COLUMN_PRIVILEGES','DOMAINS',
             'DOMAIN_CONSTRAINTS','KEY_COLUMN_USAGE'))"
        );

        // query failed ?
        if( !$sql )
        {
            trigger_error(
    		  "Could not retrieve the tables from the database!\n".
    		  "Query: ".$this->getLastQuery()."\n".
    		  "Error: ".$this->getError(),
    		  E_USER_WARNING
    		);
    		return false;
        }

        // save the table names in an array and return them
        $result = array();
        $num = $this->recordCount( $sql );
        for( $i = 0; $i < $num; $i++ )
        {
            $result[] = $this->result( $sql, $i);
        }

        // save the result in the cache
    	$this->_cache['tables'] = $result;

        return $result;
    }

    /**
     * MSSQL::getNotNullFields()
     *
     * Retrieve the fields that can not contain NULL
     *
     * @param string $table: The table which fields we should retrieve
     * @return array
     * @access public
     * @author Teye Heimans
     */
    function getNotNullFields ( $table )
    {
        $t = strtolower($table);

        // return the data from the cache if it exists
        if( isset( $this->_cache['notnull'][$t] ) )
        {
            return $this->_cache['notnull'][$t];
        }

    	// get the not null fields
    	$sql = $this->query("
    	  SELECT
    	    column_name fld
    	  FROM
    	    information_schema.columns
          WHERE
            table_name = '".$table."' AND
            is_nullable = 'No'"
    	);

    	// query failed ?
		if( ! $sql )
		{
			trigger_error(
    		  "Could not fetch the not nullable fields of the table '".$table."'.\n".
    		  "Query: ".$this->getLastQuery()."\n".
    		  "Error: ".$this->getError(),
    		  E_USER_WARNING
    		);
    		return false;
		}

		// save the fields in an array and return it
		$result = array();
		while ( $row = $this->getRecord( $sql) )
		{
			$result[] = $row['fld'];
		}

		mssql_free_result($sql);

		// save the result in the cache
    	$this->_cache['notnull'][$t] = $result;

		return $result;
    }

    /**
     * MSSQL::getFieldTypes()
     *
     * Retrieve the field types of the given table
     *
     * @param string $table: The table where we should fetch the fields and their types from
     * @return array
     * @access public
     * @author Teye Heimans
     */
    function getFieldTypes( $table )
    {
        $t = strtolower($table);

        // return the data from the cache if it exists
        if( isset( $this->_cache['fieldtypes'][$t] ) )
        {
            return $this->_cache['fieldtypes'][$t];
        }

        // get the meta data
        $sql = $this->query("
          SELECT
            c.name fld,
            t.name type,
            c.length
          FROM syscolumns c
          JOIN systypes t ON t.xusertype = c.xusertype
          JOIN sysobjects o ON o.id = c.id
          WHERE o.name='".$table."'"
        );

        // query failed ?
        if( !$sql )
        {
            trigger_error(
    		  "Could not fetch the meta data of the columns for table '".$table."'.\n".
    		  "Query: ".$this->getLastQuery()."\n".
    		  "Error: ".$this->getError(),
    		  E_USER_WARNING
    		);
    		return false;
        }

        // save the result in an array
        // TODO: load the default values in the 3rd place in the array
        $result = array();
        while( $row = $this->getRecord( $sql ) )
        {
            $result[ $row['fld'] ] = array(
              $row['type'],
              $row['length'],
              null // default value
            );
        }

        // save the result in the cache
    	$this->_cache['fieldtypes'][$t] = $result;

		return $result;
    }


    /**
     * MSSQL::escapeString()
     *
     * Escape the string we are going to save from dangerous characters
     *
     * @param string $string
     * @return string
     * @access public
     * @author Teye Heimans
     */
    function escapeString( $string )
    {
        return preg_replace("'","''",$string);
    }

    /**
     * MSSQL::getPrKeys()
     *
     * Fetch the keys from the table
     *
     * @param string $table: the table where we should fetch the keys from
     * @return array of the keys which are found
     * @access public
     * @author Teye Heimans
     */
    function getPrKeys( $table )
    {
        $t = strtolower($table);

        // return the data from the cache if it exists
        if( isset( $this->_cache['keys'][$t] ) )
        {
            return $this->_cache['keys'][$t];
        }

    	// get the primary keys
		$sql = $this->query("
		  SELECT
		    k.column_name fld
		  FROM
		    information_schema.key_column_usage k,
		    information_schema.table_constraints tc
		  WHERE
		    tc.constraint_name = k.constraint_name AND
		    tc.constraint_type = 'PRIMARY KEY' AND
		    k.table_name = '".$table."'"
		);

		// query failed ?
		if( ! $sql )
		{
			trigger_error(
    		  "Could not fetch the primary keys for the table '".$table."'.\n".
    		  "Query: ".$this->getLastQuery()."\n".
    		  "Error: ".$this->getError(),
    		  E_USER_WARNING
    		);
    		return false;
		}

		// get the fields, put them into an array and return them
		$result = array();
		while( $row = $this->getRecord( $sql ) )
		{
			$result[] = $row['fld'];
		}

		mssql_free_result($sql);

		// save the result in the cache
        $this->_cache['keys'][$t] = $result;

		return $result;
    }

    /**
     * MSSQL::getUniqueFields()
     *
     * Fetch the unique fields from the table
     *
     * @param string $table: the table where we should fetch the unique fields from
     * @return array of the keys which are found
     * @access public
     * @author Teye Heimans
     */
    function getUniqueFields( $table )
    {
        $t = strtolower( $table );

        // return the data from the cache if it exists
        if( isset( $this->_cache['unique'][$t] ) )
        {
            return $this->_cache['unique'][$t];
        }

        // fetch the unique fields
    	$sql = $this->query("
          SELECT
            t1.constraint_name con,
            t2.column_name fld
		  FROM
		    information_schema.table_constraints t1,
		    information_schema.constraint_column_usage t2
		  WHERE
		    t1.table_name = t2.table_name AND
		    t1.constraint_name = t2.constraint_name AND
		    (t1.constraint_type = 'UNIQUE' OR
		     t1.constraint_type = 'PRIMARY KEY') AND
		    t1.table_name = '".$table."'"
        );

        // query failed ?
		if( ! $sql )
		{
			trigger_error(
    		  "Could not fetch the unique fields for the table '".$table."'.\n".
    		  "Query: ".$this->getLastQuery()."\n".
    		  "Error: ".$this->getError(),
    		  E_USER_WARNING
    		);
    		return false;
		}

        // put the unique fields into an array and return them
        $result = array();
        while( $row = $this->getRecord( $sql ) )
        {
            $result[$row['con']][] = $row['fld'];
        }

        mssql_free_result($sql);

        // save the result in the cache
        $this->_cache['unique'][$t] = $result;

        return $result;
    }
}

?>
Back to Top