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