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authorAndreas Fischer <bantu@phpbb.com>2012-12-14 02:55:07 +0100
committerAndreas Fischer <bantu@phpbb.com>2012-12-14 02:55:07 +0100
commitf4df152b4b88d2c7e2866cc829059781d2aea437 (patch)
treecc337fc0493088a80bbab4740f8529f5b6a38236 /phpBB/includes/functions_database_helper.php
parent73e7fa8e8ee9c2db7874dbe18605d3a0aa59b86f (diff)
parenta686910958c0ca6eb64c7be10d60d1ebe15999c9 (diff)
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Merge remote-tracking branch 'p/ticket/11162' into develop-olympus
* p/ticket/11162: (22 commits) [ticket/11162] Reformat. [ticket/11162] Rename tricky updates to database helper. [ticket/11162] Use empty($queries). [ticket/11162] Review comments fixed. [ticket/11162] Reformat. [ticket/11162] Newlines to LF. [ticket/11162] Use correct functions. [ticket/11162] Account for notify_status. [ticket/11162] This test really only works for bookmarks. [ticket/11162] The test is not at all trivial. [ticket/11162] Add includes. [ticket/11162] Move to a separate file to avoid blowing out functions.php. [ticket/11162] No whitespace changes in olympus. [ticket/11162] Fix inaccurately copy pasted comment. [ticket/11162] Use phpbb_update_rows_avoiding_duplicates in mcp. [ticket/11162] Clarify that only the two tables actually work. [ticket/11162] Uncomment transactions. [ticket/11162] An implementation that actually works. [ticket/11162] Make count function upper case. [ticket/11162] Rename count variable name to remaining_rows. ...
Diffstat (limited to 'phpBB/includes/functions_database_helper.php')
-rw-r--r--phpBB/includes/functions_database_helper.php206
1 files changed, 206 insertions, 0 deletions
diff --git a/phpBB/includes/functions_database_helper.php b/phpBB/includes/functions_database_helper.php
new file mode 100644
index 0000000000..664c246888
--- /dev/null
+++ b/phpBB/includes/functions_database_helper.php
@@ -0,0 +1,206 @@
+<?php
+/**
+*
+* @package phpBB3
+* @copyright (c) 2012 phpBB Group
+* @license http://opensource.org/licenses/gpl-2.0.php GNU General Public License v2
+*
+*/
+
+/**
+* @ignore
+*/
+if (!defined('IN_PHPBB'))
+{
+ exit;
+}
+
+/**
+* Updates rows in given table from a set of values to a new value.
+* If this results in rows violating uniqueness constraints, the duplicate
+* rows are eliminated.
+*
+* The only supported table is bookmarks.
+*
+* @param dbal $db Database object
+* @param string $table Table on which to perform the update
+* @param string $column Column whose values to change
+* @param array $from_values An array of values that should be changed
+* @param int $to_value The new value
+* @return null
+*/
+function phpbb_update_rows_avoiding_duplicates($db, $table, $column, $from_values, $to_value)
+{
+ $sql = "SELECT $column, user_id
+ FROM $table
+ WHERE " . $db->sql_in_set($column, $from_values);
+ $result = $db->sql_query($sql);
+
+ $old_user_ids = array();
+ while ($row = $db->sql_fetchrow($result))
+ {
+ $old_user_ids[$row[$column]][] = (int) $row['user_id'];
+ }
+ $db->sql_freeresult($result);
+
+ $sql = "SELECT $column, user_id
+ FROM $table
+ WHERE $column = " . (int) $to_value;
+ $result = $db->sql_query($sql);
+
+ $new_user_ids = array();
+ while ($row = $db->sql_fetchrow($result))
+ {
+ $new_user_ids[$row[$column]][] = (int) $row['user_id'];
+ }
+ $db->sql_freeresult($result);
+
+ $queries = array();
+ foreach ($from_values as $from_value)
+ {
+ if (!isset($old_user_ids[$from_value]))
+ {
+ continue;
+ }
+ if (empty($new_user_ids))
+ {
+ $sql = "UPDATE $table
+ SET $column = " . (int) $to_value . "
+ WHERE $column = '" . $db->sql_escape($from_value) . "'";
+ $queries[] = $sql;
+ }
+ else
+ {
+ $different_user_ids = array_diff($old_user_ids[$from_value], $new_user_ids[$to_value]);
+ if (!empty($different_user_ids))
+ {
+ $sql = "UPDATE $table
+ SET $column = " . (int) $to_value . "
+ WHERE $column = '" . $db->sql_escape($from_value) . "'
+ AND " . $db->sql_in_set('user_id', $different_user_ids);
+ $queries[] = $sql;
+ }
+ }
+ }
+
+ if (!empty($queries))
+ {
+ $db->sql_transaction('begin');
+
+ foreach ($queries as $sql)
+ {
+ $db->sql_query($sql);
+ }
+
+ $sql = "DELETE FROM $table
+ WHERE " . $db->sql_in_set($column, $from_values);
+ $db->sql_query($sql);
+
+ $db->sql_transaction('commit');
+ }
+}
+
+/**
+* Updates rows in given table from a set of values to a new value.
+* If this results in rows violating uniqueness constraints, the duplicate
+* rows are merged respecting notify_status (0 takes precedence over 1).
+*
+* The only supported table is topics_watch.
+*
+* @param dbal $db Database object
+* @param string $table Table on which to perform the update
+* @param string $column Column whose values to change
+* @param array $from_values An array of values that should be changed
+* @param int $to_value The new value
+* @return null
+*/
+function phpbb_update_rows_avoiding_duplicates_notify_status($db, $table, $column, $from_values, $to_value)
+{
+ $sql = "SELECT $column, user_id, notify_status
+ FROM $table
+ WHERE " . $db->sql_in_set($column, $from_values);
+ $result = $db->sql_query($sql);
+
+ $old_user_ids = array();
+ while ($row = $db->sql_fetchrow($result))
+ {
+ $old_user_ids[(int) $row['notify_status']][$row[$column]][] = (int) $row['user_id'];
+ }
+ $db->sql_freeresult($result);
+
+ $sql = "SELECT $column, user_id
+ FROM $table
+ WHERE $column = " . (int) $to_value;
+ $result = $db->sql_query($sql);
+
+ $new_user_ids = array();
+ while ($row = $db->sql_fetchrow($result))
+ {
+ $new_user_ids[$row[$column]][] = (int) $row['user_id'];
+ }
+ $db->sql_freeresult($result);
+
+ $queries = array();
+ $extra_updates = array(
+ 0 => 'notify_status = 0',
+ 1 => '',
+ );
+ foreach ($from_values as $from_value)
+ {
+ foreach ($extra_updates as $notify_status => $extra_update)
+ {
+ if (!isset($old_user_ids[$notify_status][$from_value]))
+ {
+ continue;
+ }
+ if (empty($new_user_ids))
+ {
+ $sql = "UPDATE $table
+ SET $column = " . (int) $to_value . "
+ WHERE $column = '" . $db->sql_escape($from_value) . "'";
+ $queries[] = $sql;
+ }
+ else
+ {
+ $different_user_ids = array_diff($old_user_ids[$notify_status][$from_value], $new_user_ids[$to_value]);
+ if (!empty($different_user_ids))
+ {
+ $sql = "UPDATE $table
+ SET $column = " . (int) $to_value . "
+ WHERE $column = '" . $db->sql_escape($from_value) . "'
+ AND " . $db->sql_in_set('user_id', $different_user_ids);
+ $queries[] = $sql;
+ }
+
+ if ($extra_update)
+ {
+ $same_user_ids = array_diff($old_user_ids[$notify_status][$from_value], $different_user_ids);
+ if (!empty($same_user_ids))
+ {
+ $sql = "UPDATE $table
+ SET $extra_update
+ WHERE $column = '" . (int) $to_value . "'
+ AND " . $db->sql_in_set('user_id', $same_user_ids);
+ $queries[] = $sql;
+ }
+ }
+ }
+ }
+ }
+
+ if (!empty($queries))
+ {
+ $db->sql_transaction('begin');
+
+ foreach ($queries as $sql)
+ {
+ $db->sql_query($sql);
+ }
+
+ $sql = "DELETE FROM $table
+ WHERE " . $db->sql_in_set($column, $from_values);
+ $db->sql_query($sql);
+
+ $db->sql_transaction('commit');
+ }
+}
generated by cgit v1.2.1 (git 2.21.0) at 2025-06-10 18:47:43 +0000