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MDL-17969 mssql sql generator. Now works with temptables store and facilities

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This commit is contained in:
stronk7 2009-08-30 23:24:08 +00:00
parent c6ea7fc24e
commit 18672a3e22
1 changed files with 26 additions and 6 deletions
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32
lib/ddl/mssql_sql_generator.php
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@ -72,10 +72,13 @@ class mssql_sql_generator extends sql_generator {
public $rename_key_sql = null; //SQL sentence to rename one key
//TABLENAME, OLDKEYNAME, NEWKEYNAME are dinamically replaced
private $temptables; // Control existing temptables (mssql_native_moodle_temptables object)
/**
* Creates one new XMLDBmssql
*/
public function __construct($mdb) {
public function __construct($mdb, $temptables = null) {
$this->temptables = $temptables;
parent::__construct($mdb);
}
@ -99,15 +102,34 @@ class mssql_sql_generator extends sql_generator {
return $this->mdb->change_database_structure("DBCC CHECKIDENT ('$this->prefix$tablename', RESEED, $value)");
}
/**
* Given one xmldb_table, returns it's correct name, depending of all the parametrization
* Overriden to allow change of names in temp tables
*
* @param xmldb_table table whose name we want
* @param boolean to specify if the name must be quoted (if reserved word, only!)
* @return string the correct name of the table
*/
public function getTableName(xmldb_table $xmldb_table, $quoted=true) {
/// Get the name, supporting special mssql names for temp tables
$tablename = $this->temptables->get_correct_name($xmldb_table->getName());
/// Apply quotes optionally
if ($quoted) {
$tablename = $this->getEncQuoted($tablename);
}
return $tablename;
}
/**
* Given one correct xmldb_table, returns the SQL statements
* to create temporary table (inside one array)
*/
public function getCreateTempTableSQL($xmldb_table) {
$this->temptables->add_temptable($xmldb_table->getName());
$sqlarr = $this->getCreateTableSQL($xmldb_table);
//ugly hack!
$this->mdb->temptables[trim($xmldb_table->getName(), '#')] = true;
return $sqlarr;
}
@ -118,9 +140,7 @@ class mssql_sql_generator extends sql_generator {
public function getDropTempTableSQL($xmldb_table) {
$sqlarr = $this->getDropTableSQL($xmldb_table);
$tablename = $xmldb_table->getName();
array_unshift($sqlarr, "TRUNCATE TABLE {".$tablename."}"); // oracle requires truncate before being able to drop a temp table
//ugly hack!
unset($this->mdb->temptables[trim($xmldb_table->getName(), '#')]);
$this->temptables->delete_temptable($tablename);
return $sqlarr;
}