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[ticket/10751] Add sql_lower_text() to database abstraction layer.

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On MSSQL, LOWER() can only be called on bounded strings (i.e. varchar or char).
So, in order to use it on a text column, we have to convert it to an
appropriate type. We do so using the SUBSTRING function.

PHPBB3-10751
This commit is contained in:
Andreas Fischer 2012-05-31 11:44:41 +02:00
parent 275dabbc4f
commit 643a86504a
4 changed files with 36 additions and 0 deletions
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12
phpBB/includes/db/dbal.php
View File

@ -500,6 +500,18 @@ class dbal
return $column_name . ' | ' . (1 << $bit) . (($compare) ? ' ' . $compare : '');
}
/**
* Run LOWER() on DB column of type text (i.e. neither varchar nor char).
*
* @param string $column_name The column name to use
*
* @return string A SQL statement like "LOWER($column_name)"
*/
function sql_lower_text($column_name)
{
return "LOWER($column_name)";
}
/**
* Run more than one insert statement.
*

8
phpBB/includes/db/mssql.php
View File

@ -332,6 +332,14 @@ class dbal_mssql extends dbal
return str_replace(array("'", "\0"), array("''", ''), $msg);
}
/**
* {@inheritDoc}
*/
function sql_lower_text($column_name)
{
return "LOWER(SUBSTRING($column_name, 1, DATALENGTH($column_name)))";
}
/**
* Build LIKE expression
* @access private

8
phpBB/includes/db/mssql_odbc.php
View File

@ -310,6 +310,14 @@ class dbal_mssql_odbc extends dbal
return str_replace(array("'", "\0"), array("''", ''), $msg);
}
/**
* {@inheritDoc}
*/
function sql_lower_text($column_name)
{
return "LOWER(SUBSTRING($column_name, 1, DATALENGTH($column_name)))";
}
/**
* Build LIKE expression
* @access private

8
phpBB/includes/db/mssqlnative.php
View File

@ -492,6 +492,14 @@ class dbal_mssqlnative extends dbal
return str_replace(array("'", "\0"), array("''", ''), $msg);
}
/**
* {@inheritDoc}
*/
function sql_lower_text($column_name)
{
return "LOWER(SUBSTRING($column_name, 1, DATALENGTH($column_name)))";
}
/**
* Build LIKE expression
* @access private