support postgres identity columns

Author: jiripudil

src/Platforms/PostgreSqlPlatform.php

@@ -88,9 +88,14 @@ public function getColumns(string $table, ?string $schema = null): array
 				CASE WHEN a.atttypmod = -1 THEN NULL ELSE a.atttypmod -4 END AS size,
 				pg_catalog.pg_get_expr(ad.adbin, 'pg_catalog.pg_attrdef'::regclass)::varchar AS default,
 				COALESCE(co.contype = 'p', FALSE) AS is_primary,
-				COALESCE(co.contype = 'p' AND strpos(pg_get_expr(ad.adbin, ad.adrelid), 'nextval') = 1, FALSE) AS is_autoincrement,
+				COALESCE(co.contype = 'p' AND (strpos(pg_get_expr(ad.adbin, ad.adrelid), 'nextval') = 1 OR a.attidentity != ''), FALSE) AS is_autoincrement,
 				NOT (a.attnotnull OR t.typtype = 'd' AND t.typnotnull) AS is_nullable,
-				SUBSTRING(pg_catalog.pg_get_expr(ad.adbin, 'pg_catalog.pg_attrdef'::regclass) FROM %s) AS sequence
+			") . (
+				count($tableArgs) > 1
+					? "pg_get_serial_sequence('%table.%table', a.attname) AS sequence"
+					: "pg_get_serial_sequence('%table', a.attname) AS sequence"
+			)
+			. (/** @lang GenericSQL */ "
 			FROM
 				pg_catalog.pg_attribute AS a
 				JOIN pg_catalog.pg_class AS c ON a.attrelid = c.oid
@@ -108,7 +113,7 @@ public function getColumns(string $table, ?string $schema = null): array
 				AND NOT a.attisdropped
 			ORDER BY
 				a.attnum
-		"), "nextval[(]'\"?([^'\"]+)", ...$tableArgs);
+		"), ...$tableArgs, ...$tableArgs);
 
 		$columns = [];
 		foreach ($result as $row) {

tests/cases/integration/platform.postgres.phpt

@@ -50,7 +50,7 @@ class PlatformPostgresTest extends IntegrationTestCase
 				'isAutoincrement' => true,
 				'isUnsigned' => false,
 				'isNullable' => false,
-				'meta' => ['sequence' => 'books_id_seq'],
+				'meta' => ['sequence' => 'public.books_id_seq'],
 			],
 			'author_id' => [
 				'name' => 'author_id',
@@ -122,7 +122,7 @@ class PlatformPostgresTest extends IntegrationTestCase
 				'isAutoincrement' => true,
 				'isUnsigned' => false,
 				'isNullable' => false,
-				'meta' => ['sequence' => 'eans_id_seq'],
+				'meta' => ['sequence' => 'public.eans_id_seq'],
 			],
 			'code' => [
 				'name' => 'code',
@@ -245,7 +245,7 @@ class PlatformPostgresTest extends IntegrationTestCase
 
 	public function testPrimarySequence()
 	{
-		Assert::same('books_id_seq', $this->connection->getPlatform()->getPrimarySequenceName('books'));
+		Assert::same('public.books_id_seq', $this->connection->getPlatform()->getPrimarySequenceName('books'));
 	}