// Generate constraint clauses for UNIQUE and PRIMARY KEY constraints
	$sql_pri_keys = "
		SELECT 
			a.attname AS column_name,
			i.indisprimary AS primary_key,
			i.indisunique as unique_key,
			ic.relname AS index_name
		FROM 
			pg_class bc,
			pg_class ic,
			pg_index i,
			pg_attribute a
		WHERE 
			i.indrelid = bc.oid
			and i.indexrelid = ic.oid
			and 
			(
				i.indkey[0] = a.attnum 
				or
				i.indkey[1] = a.attnum
				or
				i.indkey[2] = a.attnum
				or
				i.indkey[3] = a.attnum
				or
				i.indkey[4] = a.attnum
				or
				i.indkey[5] = a.attnum
				or
				i.indkey[6] = a.attnum
				or
				i.indkey[7] = a.attnum
			)
			and a.attrelid = bc.oid
			and i.indproc = '0'::oid
			and bc.relname = '$table'
	";

	$result = @pg_exec($link, pre_query($sql_pri_keys)) or pg_die();

	$i = 0;
	while ($row = @pg_fetch_array($result, $i++)) {
		if ($row[column_name] != $drop_field) {
			if ($row[primary_key] == "t") {
				if (!empty($primary_key)) {
					$primary_key .= ", ";
				}
				$primary_key .= "$cfgQuotes$row[column_name]$cfgQuotes";
				$primary_key_name = $row[index_name];
			} elseif ($row[unique_key] == "t") {
				$schema_create .= "   CONSTRAINT $cfgQuotes$row[index_name]$cfgQuotes UNIQUE ($cfgQuotes$row[column_name]$cfgQuotes),$crlf";
			} else {
				$index_create .= "CREATE INDEX $cfgQuotes" . $row[column_name] . "_$table" . "_key$cfgQuotes ON $cfgQuotes$table$cfgQuotes ($cfgQuotes$row[column_name]$cfgQuotes);$crlf";
			}
		}
	}
	if (!empty($primary_key)) {
		$schema_create .= "   CONSTRAINT $cfgQuotes$primary_key_name$cfgQuotes PRIMARY KEY ($primary_key),$crlf";
	}