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MINOR Clearer documentation on MSSQLDatabase::getPrimaryKey()

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This commit is contained in:
Sean Harvey 2010-10-20 03:21:54 +00:00
parent 9a86a6d9a5
commit 7b6899b3f0
1 changed files with 16 additions and 14 deletions
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30
code/MSSQLDatabase.php
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@ -314,25 +314,27 @@ class MSSQLDatabase extends SS_Database {
public function getGeneratedID($table) {
return $this->query("SELECT IDENT_CURRENT('$table')")->value();
}
/*
* This is a handy helper function which will return the primary key for any paricular table
* In MSSQL, the primary key is often an internal identifier, NOT the standard name (ie, 'ID'),
* so we need to do a lookup for it.
/**
* MSSQL stores the primary key column with an internal identifier,
* so a lookup needs to be done to determine it.
*
* @param string $tableName Name of table with primary key column "ID"
* @return string Internal identifier for primary key
*/
function getPrimaryKey($tableName){
$indexes=DB::query("EXEC sp_helpindex '$tableName';");
$primary_key='';
foreach($indexes as $this_index){
if($this_index['index_keys']=='ID'){
$primary_key=$this_index['index_name'];
function getPrimaryKey($tableName) {
$indexes = DB::query("EXEC sp_helpindex '$tableName';");
$indexName = '';
foreach($indexes as $index) {
if($index['index_keys'] == 'ID') {
$indexName = $index['index_name'];
break;
}
}
return $primary_key;
return $indexName;
}
function getIdentityColumn($tableName) {
return $this->query("
SELECT