PostgreReflector: detect IDENTITY columns as autoincrement

Author: JanRossler

src/Dibi/Drivers/PostgreReflector.php

@@ -91,7 +91,8 @@ public function getColumns(string $table): array
 					a.atttypmod-4 AS character_maximum_length,
 					NOT a.attnotnull AS is_nullable,
 					a.attnum AS ordinal_position,
-					pg_get_expr(adef.adbin, adef.adrelid) AS column_default
+					pg_get_expr(adef.adbin, adef.adrelid) AS column_default,
+					CASE WHEN a.attidentity IN ('a', 'd') THEN 'YES' ELSE 'NO' END AS is_identity
 				FROM
 					pg_attribute a
 					JOIN pg_type ON a.atttypid = pg_type.oid
@@ -116,7 +117,7 @@ public function getColumns(string $table): array
 				'size' => $size > 0 ? $size : null,
 				'nullable' => $row['is_nullable'] === 'YES' || $row['is_nullable'] === 't' || $row['is_nullable'] === true,
 				'default' => $row['column_default'],
-				'autoincrement' => str_starts_with($row['column_default'] ?? '', 'nextval('),
+				'autoincrement' => $row['is_identity'] === 'YES' || str_starts_with($row['column_default'] ?? '', 'nextval('),
 				'vendor' => $row,
 			];
 		}