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extra code for changing defaults under mssql

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Ralf Becker 2006-04-09 10:53:31 +00:00
parent 99f56b1af9
commit b826e5c2a3
1 changed files with 36 additions and 5 deletions
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41
phpgwapi/inc/adodb/datadict/datadict-mssql.inc.php
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@ -93,19 +93,50 @@ class ADODB2_mssql extends ADODB_DataDict {
return $sql; return $sql;
} }
/* /**
function AlterColumnSQL($tabname, $flds) * query the name of a default constrain
*
* @param string $tabname table-name
* @param string $colname column-name
* @return boolean/string name of the default constrain or false if there's none
*/
function _get_default_name($tabname,$colname)
{
return $this->connection->GetOne("SELECT sysobjects.name FROM sysobjects JOIN syscolumns ON syscolumns.id=parent_obj AND info=colorder ".
"WHERE syscolumns.name='$colname' AND sysobjects.xtype='D' AND parent_obj=(SELECT id FROM sysobjects WHERE name='$tableoptions' and type='U')");
}
/**
* Change the definition of one column
*
* Reimplemented because MSSQL need a different handling for DEFAULT, it cant be in an ALTER COLUMN
*
* @param string $tabname table-name
* @param string $flds column-name and type for the changed column
* @param string $tableflds='' complete defintion of the new table, eg. for postgres, default ''
* @param array/string $tableoptions='' options for the new table see CreateTableSQL, default ''
* @return array with SQL strings
*/
function AlterColumnSQL($tabname, $flds, $tableflds='',$tableoptions='')
{ {
$tabname = $this->TableName ($tabname); $tabname = $this->TableName ($tabname);
$sql = array(); $sql = array();
list($lines,$pkey) = $this->_GenFields($flds); list($lines,$pkey) = $this->_GenFields($flds);
$alter = 'ALTER TABLE ' . $tabname . $this->alterCol . ' ';
foreach($lines as $v) { foreach($lines as $v) {
$sql[] = "ALTER TABLE $tabname $this->alterCol $v"; list($colname) = explode(' ',$v);
// drop a default if it exists
$def_name = $this->_get_default_name($tabname,$colname);
$sql[] = "EXEC sp_unbindefault '$tabname.$colname'";
$sql[] = "DROP DEFAULT $def_name";
if (preg_match("/DEFAULT ([0-9]+|'[^']*')/",$lines,$matches)) {
$sql[] = $alter . str_replace("DEFAULT $matches[1]",'',$v);
$sql[] = "ALTER TABLE $tabname ADD CONSTRAINT def_{$tabname}_$colname DEFAULT $matches[1] FOR $colname";
} else
$sql[] = $alter . $v;
} }
return $sql; return $sql;
} }
*/
function DropColumnSQL($tabname, $flds) function DropColumnSQL($tabname, $flds)
{ {