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BUG Support for case sensitive searches

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Through newly added Database->comparisonClause() API
This commit is contained in:
Ingo Schommer 2012-12-11 01:47:35 +01:00
parent 334c2634ac
commit d17ae37411
1 changed files with 44 additions and 0 deletions
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44
code/MSSQLDatabase.php
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@ -1559,6 +1559,50 @@ class MSSQLDatabase extends SS_Database {
return "N'" . Convert::raw2sql($string) . "'";
}
/**
* Generate a WHERE clause for text matching.
*
* @param String $field Quoted field name
* @param String $value Escaped search. Can include percentage wildcards.
* @param boolean $exact Exact matches or wildcard support.
* @param boolean $negate Negate the clause.
* @param boolean $caseSensitive Enforce case sensitivity if TRUE or FALSE.
* Stick with default collation if set to NULL.
* @return String SQL
*/
public function comparisonClause($field, $value, $exact = false, $negate = false, $caseSensitive = null) {
if($exact) {
$comp = ($negate) ? '!=' : '=';
} else {
$comp = 'LIKE';
if($negate) $comp = 'NOT ' . $comp;
}
// Field definitions are case insensitive by default,
// change used collation for case sensitive searches.
$collateClause = '';
if($caseSensitive === true) {
if(self::$collation) {
$collation = preg_replace('/_CI_/', '_CS_', self::$collation);
} else {
$collation = 'Latin1_General_CS_AS';
}
$collateClause = ' COLLATE ' . $collation;
} elseif($caseSensitive === false) {
if(self::$collation) {
$collation = preg_replace('/_CS_/', '_CI_', self::$collation);
} else {
$collation = 'Latin1_General_CI_AS';
}
$collateClause = ' COLLATE ' . $collation;
}
$clause = sprintf("%s %s '%s'", $field, $comp, $value);
if($collateClause) $clause .= $collateClause;
return $clause;
}
/**
* Function to return an SQL datetime expression for MSSQL
* used for querying a datetime in a certain format