3 +--------------------------------------------------------------------+
5 +--------------------------------------------------------------------+
6 | Copyright CiviCRM LLC (c) 2004-2019 |
7 +--------------------------------------------------------------------+
8 | This file is a part of CiviCRM. |
10 | CiviCRM is free software; you can copy, modify, and distribute it |
11 | under the terms of the GNU Affero General Public License |
12 | Version 3, 19 November 2007 and the CiviCRM Licensing Exception. |
14 | CiviCRM is distributed in the hope that it will be useful, but |
15 | WITHOUT ANY WARRANTY; without even the implied warranty of |
16 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. |
17 | See the GNU Affero General Public License for more details. |
19 | You should have received a copy of the GNU Affero General Public |
20 | License and the CiviCRM Licensing Exception along |
21 | with this program; if not, contact CiviCRM LLC |
22 | at info[AT]civicrm[DOT]org. If you have questions about the |
23 | GNU Affero General Public License or the licensing of CiviCRM, |
24 | see the CiviCRM license FAQ at http://civicrm.org/licensing |
25 +--------------------------------------------------------------------+
31 * @copyright CiviCRM LLC (c) 2004-2019
34 * - MySQL imposes a 64 char limit.
35 * - All temp tables start with "civicrm_tmp".
36 * - Durable temp tables: "civicrm_tmp_d_{12}_{32}"
37 * - Ephemeral temp tables: "civicrm_tmp_e_{12}_{32}"
40 * - Begin by calling `CRM_Utils_SQL_TempTable::build()`.
41 * - Optionally, describe the table with `setDurable()`, `setCategory()`, `setId()`.
42 * - Finally, call `getName()` or `createWithQuery()` or `createWithColumns()`.
44 * Example 1: Just create a table name. You'll be responsible for CREATE/DROP actions.
46 * $name = CRM_Utils_SQL_TempTable::build()->getName();
47 * $name = CRM_Utils_SQL_TempTable::build()->setDurable()->getName();
48 * $name = CRM_Utils_SQL_TempTable::build()->setCategory('contactstats')->setId($contact['id'])->getName();
50 * Example 2: Create a temp table using the results of a SELECT query.
52 * $tmpTbl = CRM_Utils_SQL_TempTable::build()->createWithQuery('SELECT id, display_name FROM civicrm_contact');
53 * $tmpTbl = CRM_Utils_SQL_TempTable::build()->createWithQuery(CRM_Utils_SQL_Select::from('civicrm_contact')->select('display_name'));
55 * Example 3: Create an empty temp table with list of columns.
57 * $tmpTbl = CRM_Utils_SQL_TempTable::build()->setDurable()->setUtf8()->createWithColumns('id int(10, name varchar(64)');
59 * Example 4: Drop a table that you previously created.
63 * Example 5: Auto-drop a temp table when $tmpTbl falls out of scope
65 * $tmpTbl->setAutodrop();
68 class CRM_Utils_SQL_TempTable
{
70 const UTF8
= 'DEFAULT CHARACTER SET utf8 COLLATE utf8_unicode_ci';
71 const CATEGORY_LENGTH
= 12;
72 const CATEGORY_REGEXP
= ';^[a-zA-Z0-9]+$;';
73 const ID_LENGTH
= 37; // MAX{64} - CATEGORY_LENGTH{12} - CONST_LENGHTH{15} = 37
74 const ID_REGEXP
= ';^[a-zA-Z0-9_]+$;';
79 protected $durable, $utf8;
88 * @return CRM_Utils_SQL_TempTable
90 public static function build() {
91 $t = new CRM_Utils_SQL_TempTable();
93 $t->id
= md5(uniqid('', TRUE));
94 // The constant CIVICRM_TEMP_FORCE_DURABLE is for local debugging.
95 $t->durable
= CRM_Utils_Constant
::value('CIVICRM_TEMP_FORCE_DURABLE', FALSE);
96 // I suspect it would be better to just say utf8=true, but a lot of existing queries don't do the utf8 bit.
97 $t->utf8
= CRM_Utils_Constant
::value('CIVICRM_TEMP_FORCE_UTF8', FALSE);
102 public function __destruct() {
103 if ($this->autodrop
) {
109 * Determine the full table name.
112 * Ex: 'civicrm_tmp_d_foo_abcd1234abcd1234'
114 public function getName() {
115 $parts = ['civicrm', 'tmp'];
116 $parts[] = ($this->durable ?
'd' : 'e');
117 $parts[] = $this->category ?
$this->category
: 'dflt';
118 $parts[] = $this->id ?
$this->id
: 'dflt';
119 return implode('_', $parts);
123 * Create the table using results from a SELECT query.
125 * @param string|CRM_Utils_SQL_Select $selectQuery
126 * @return CRM_Utils_SQL_TempTable
128 public function createWithQuery($selectQuery) {
129 $sql = sprintf('%s %s AS %s',
130 $this->toSQL('CREATE'),
131 $this->utf8 ? self
::UTF8
: '',
132 ($selectQuery instanceof CRM_Utils_SQL_Select ?
$selectQuery->toSQL() : $selectQuery)
134 CRM_Core_DAO
::executeQuery($sql, array(), TRUE, NULL, TRUE, FALSE);
139 * Create the empty table.
141 * @parma string $columns
142 * SQL column listing.
143 * Ex: 'id int(10), name varchar(64)'.
144 * @return CRM_Utils_SQL_TempTable
146 public function createWithColumns($columns) {
147 $sql = sprintf('%s (%s) %s',
148 $this->toSQL('CREATE'),
150 $this->utf8 ? self
::UTF8
: ''
152 CRM_Core_DAO
::executeQuery($sql, array(), TRUE, NULL, TRUE, FALSE);
159 * @return CRM_Utils_SQL_TempTable
161 public function drop() {
162 $sql = $this->toSQL('DROP', 'IF EXISTS');
163 CRM_Core_DAO
::executeQuery($sql, array(), TRUE, NULL, TRUE, FALSE);
168 * @param string $action
169 * Ex: 'CREATE', 'DROP'
170 * @param string|NULL $ifne
171 * Ex: 'IF EXISTS', 'IF NOT EXISTS'.
173 * Ex: 'CREATE TEMPORARY TABLE `civicrm_tmp_e_foo_abcd1234`'
174 * Ex: 'CREATE TABLE IF NOT EXISTS `civicrm_tmp_d_foo_abcd1234`'
176 private function toSQL($action, $ifne = NULL) {
179 if (!$this->durable
) {
180 $parts[] = 'TEMPORARY';
186 $parts[] = '`' . $this->getName() . '`';
187 return implode(' ', $parts);
191 * @return string|NULL
193 public function getCategory() {
194 return $this->category
;
198 * @return string|NULL
200 public function getId() {
207 public function isAutodrop() {
208 return $this->autodrop
;
214 public function isDurable() {
215 return $this->durable
;
221 public function isUtf8() {
226 * @param bool $autodrop
227 * @return CRM_Utils_SQL_TempTable
229 public function setAutodrop($autodrop = TRUE) {
230 $this->autodrop
= $autodrop;
235 * @param string|NULL $category
237 * @return CRM_Utils_SQL_TempTable
239 public function setCategory($category) {
240 if ($category && !preg_match(self
::CATEGORY_REGEXP
, $category) ||
strlen($category) > self
::CATEGORY_LENGTH
) {
241 throw new \
RuntimeException("Malformed temp table category");
243 $this->category
= $category;
248 * Set whether the table should be durable.
250 * Durable tables are not TEMPORARY in the mysql sense.
252 * @param bool $durable
254 * @return CRM_Utils_SQL_TempTable
256 public function setDurable($durable = TRUE) {
257 $this->durable
= $durable;
266 * @return CRM_Utils_SQL_TempTable
268 public function setId($id) {
269 if ($id && !preg_match(self
::ID_REGEXP
, $id) ||
strlen($id) > self
::ID_LENGTH
) {
270 throw new \
RuntimeException("Malformed temp table id");
277 * Set table collation to UTF8.
279 * This would make sense as a default but cautiousness during phasing in has made it opt-in.
285 public function setUtf8($value = TRUE) {
286 $this->utf8
= $value;