/** * @param DatabasePostgres $db * @param string $table * @param string $field * @return null|PostgresField */ static function fromText(DatabasePostgres $db, $table, $field) { $q = <<<SQL SELECT attnotnull, attlen, conname AS conname, atthasdef, adsrc, COALESCE(condeferred, 'f') AS deferred, COALESCE(condeferrable, 'f') AS deferrable, CASE WHEN typname = 'int2' THEN 'smallint' WHEN typname = 'int4' THEN 'integer' WHEN typname = 'int8' THEN 'bigint' WHEN typname = 'bpchar' THEN 'char' ELSE typname END AS typname FROM pg_class c JOIN pg_namespace n ON (n.oid = c.relnamespace) JOIN pg_attribute a ON (a.attrelid = c.oid) JOIN pg_type t ON (t.oid = a.atttypid) LEFT JOIN pg_constraint o ON (o.conrelid = c.oid AND a.attnum = ANY(o.conkey) AND o.contype = 'f') LEFT JOIN pg_attrdef d on c.oid=d.adrelid and a.attnum=d.adnum WHERE relkind = 'r' AND nspname=%s AND relname=%s AND attname=%s; SQL; $table = $db->remappedTableName($table); $res = $db->query(sprintf($q, $db->addQuotes($db->getCoreSchema()), $db->addQuotes($table), $db->addQuotes($field))); $row = $db->fetchObject($res); if (!$row) { return null; } $n = new PostgresField(); $n->type = $row->typname; $n->nullable = $row->attnotnull == 'f'; $n->name = $field; $n->tablename = $table; $n->max_length = $row->attlen; $n->deferrable = $row->deferrable == 't'; $n->deferred = $row->deferred == 't'; $n->conname = $row->conname; $n->has_default = $row->atthasdef === 't'; $n->default = $row->adsrc; return $n; }