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Merge pull request #8 from kinglozzer/pulls/orm-null-limit

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NEW: Allow 'null' limit in database queries
This commit is contained in:
Damian Mooyman 2015-05-05 09:03:25 +12:00
commit e4960193b8
1 changed files with 43 additions and 0 deletions
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43
code/SQLite3QueryBuilder.php
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@ -7,6 +7,11 @@
*/
class SQLite3QueryBuilder extends DBQueryBuilder {
/**
* @param SQLInsert $query
* @param array $parameters
* @return string
*/
protected function buildInsertQuery(SQLInsert $query, array &$parameters) {
// Multi-row insert requires SQLite specific syntax prior to 3.7.11
// For backwards compatibility reasons include the "union all select" syntax
@ -46,4 +51,42 @@ class SQLite3QueryBuilder extends DBQueryBuilder {
return $sql;
}
/**
* Return the LIMIT clause ready for inserting into a query.
*
* @param SQLSelect $query The expression object to build from
* @param array $parameters Out parameter for the resulting query parameters
* @return string The finalised limit SQL fragment
*/
public function buildLimitFragment(SQLSelect $query, array &$parameters) {
$nl = $this->getSeparator();
// Ensure limit is given
$limit = $query->getLimit();
if(empty($limit)) return '';
// For literal values return this as the limit SQL
if( ! is_array($limit)) {
return "{$nl}LIMIT $limit";
}
// Assert that the array version provides the 'limit' key
if( ! array_key_exists('limit', $limit) || ($limit['limit'] !== null && ! is_numeric($limit['limit']))) {
throw new InvalidArgumentException(
'SQLite3QueryBuilder::buildLimitSQL(): Wrong format for $limit: '. var_export($limit, true)
);
}
$clause = "{$nl}";
if($limit['limit'] !== null) {
$clause .= "LIMIT {$limit['limit']} ";
}
if(isset($limit['start']) && is_numeric($limit['start']) && $limit['start'] !== 0) {
$clause .= "OFFSET {$limit['start']}";
}
return $clause;
}
}