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  1. <?php
  2.  
  3. /*
  4.  * OIDplus 2.0
  5.  * Copyright 2019 - 2021 Daniel Marschall, ViaThinkSoft
  6.  *
  7.  * Licensed under the Apache License, Version 2.0 (the "License");
  8.  * you may not use this file except in compliance with the License.
  9.  * You may obtain a copy of the License at
  10.  *
  11.  *     http://www.apache.org/licenses/LICENSE-2.0
  12.  *
  13.  * Unless required by applicable law or agreed to in writing, software
  14.  * distributed under the License is distributed on an "AS IS" BASIS,
  15.  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  16.  * See the License for the specific language governing permissions and
  17.  * limitations under the License.
  18.  */
  19.  
  20. if (!defined('INSIDE_OIDPLUS')) die();
  21.  
  22. class OIDplusSqlSlangPluginMsSQL extends OIDplusSqlSlangPlugin {
  23.  
  24.         public static function id(): string {
  25.                 return 'mssql';
  26.         }
  27.  
  28.         public function natOrder($fieldname, $order='asc'): string {
  29.  
  30.                 $order = strtolower($order);
  31.                 if (($order != 'asc') && ($order != 'desc')) {
  32.                         throw new OIDplusException(_L('Invalid order "%1" (needs to be "asc" or "desc")',$order));
  33.                 }
  34.  
  35.                 $out = array();
  36.  
  37.                 $max_arc_len = OIDplus::baseConfig()->getValue('LIMITS_MAX_OID_ARC_SIZE');
  38.  
  39.                 // 1. sort by namespace (oid, guid, ...)
  40.                 $out[] = "SUBSTRING($fieldname,1,CHARINDEX(':',$fieldname)-1) $order";
  41.  
  42.                 for ($i=1; $i<=OIDplus::baseConfig()->getValue('LIMITS_MAX_OID_DEPTH'); $i++) {
  43.                         // 2. Sort by the rest arcs one by one; note that MySQL can only handle decimal(65), not decimal($max_arc_len)
  44.                         $out[] = "dbo.getOidArc($fieldname, $max_arc_len, $i) $order";
  45.                 }
  46.  
  47.                 // 3. as last resort, sort by the identifier itself, e.g. if the function getOidArc always return 0 (happens if it is not an OID)
  48.                 $out[] = "$fieldname $order";
  49.  
  50.                 return implode(', ', $out);
  51.  
  52.         }
  53.  
  54.         public function sqlDate(): string {
  55.                 return 'getdate()';
  56.         }
  57.  
  58.         public function detect(OIDplusDatabaseConnection $db): bool {
  59.                 try {
  60.                         $vers = $db->query("select @@version as dbms_version")->fetch_object()->dbms_version;
  61.                         $vers = strtolower($vers);
  62.                         return strpos($vers, 'microsoft sql server') !== false;
  63.                 } catch (Exception $e) {
  64.                         return false;
  65.                 }
  66.         }
  67.  
  68.         public function insert_id(OIDplusDatabaseConnection $db): int {
  69.                 // Note: SCOPE_IDENTITY() does not work, does only give 0.
  70.                 // $res = $db->query("SELECT SCOPE_IDENTITY() AS ID");
  71.                 $res = $db->query("SELECT @@IDENTITY AS ID");
  72.                 $row = $res->fetch_array();
  73.                 return (int)$row['ID'];
  74.         }
  75.  
  76.         public function setupSetTablePrefix($cont, $table, $prefix): string {
  77.                 $cont = str_replace('['.$table.']', '['.$prefix.$table.']', $cont);
  78.                 $cont = str_replace("'dbo.$table'", "'dbo.$prefix$table'", $cont);
  79.                 $cont = str_replace('PK_'.$table, 'PK_'.$prefix.$table, $cont);
  80.                 $cont = str_replace('IX_'.$table, 'PK_'.$prefix.$table, $cont);
  81.                 $cont = str_replace('DF__'.$table, 'DF__'.$prefix.$table, $cont);
  82.                 return $cont;
  83.         }
  84.  
  85.         public function setupCreateDbIfNotExists($database): string {
  86.                 return "";
  87.         }
  88.  
  89.         public function setupUseDatabase($database): string {
  90.                 return "USE [$database]\n\nGO\n\n";
  91.         }
  92.  
  93.         public function isNullFunction($expr1, $expr2): string {
  94.                 return "isnull($expr1, $expr2)";
  95.         }
  96.  
  97.         public function filterQuery($sql): string {
  98.                 return $sql;
  99.         }
  100.  
  101.         public function getSQLBool($bool): string {
  102.                 return $bool ? '1' : '0';
  103.         }
  104.  
  105.         public function escapeString($str): string {
  106.                 return str_replace("'", "''", $str);
  107.         }
  108. }
  109.