Fix parsing quoted table name on SQLite

The pattern used in parseTableCommentFromSQL() was invalid. It would
wrap the value returned by quoteSingleIdentifier() in another set of
quotes. It would only work for unquoted table names, which would be
handled but the pattern that matches an unquoted name.

src/Schema/SQLiteSchemaManager.php

@@ -13,6 +13,7 @@
 use Doctrine\DBAL\Types\Type;
 
 use function array_change_key_case;
+use function array_map;
 use function array_merge;
 use function assert;
 use function count;
@@ -359,9 +360,8 @@ protected function _getPortableTableForeignKeyDefinition(array $tableForeignKey)
 
     private function parseColumnCollationFromSQL(string $column, string $sql): ?string
     {
-        $pattern = '{(?:\W' . preg_quote($column) . '\W|\W'
-            . preg_quote($this->platform->quoteSingleIdentifier($column))
-            . '\W)[^,(]+(?:\([^()]+\)[^,]*)?(?:(?:DEFAULT|CHECK)\s*(?:\(.*?\))?[^,]*)*COLLATE\s+["\']?([^\s,"\')]+)}is';
+        $pattern = '{' . $this->buildIdentifierPattern($column)
+            . '[^,(]+(?:\([^()]+\)[^,]*)?(?:(?:DEFAULT|CHECK)\s*(?:\(.*?\))?[^,]*)*COLLATE\s+["\']?([^\s,"\')]+)}is';
 
         if (preg_match($pattern, $sql, $match) !== 1) {
             return null;
@@ -373,9 +373,7 @@ private function parseColumnCollationFromSQL(string $column, string $sql): ?stri
     private function parseTableCommentFromSQL(string $table, string $sql): ?string
     {
         $pattern = '/\s* # Allow whitespace characters at start of line
-CREATE\sTABLE # Match "CREATE TABLE"
-(?:\W"' . preg_quote($this->platform->quoteSingleIdentifier($table), '/') . '"\W|\W' . preg_quote($table, '/')
-            . '\W) # Match table name (quoted and unquoted)
+CREATE\sTABLE' . $this->buildIdentifierPattern($table) . '
 ( # Start capture
    (?:\s*--[^\n]*\n?)+ # Capture anything that starts with whitespaces followed by -- until the end of the line(s)
 )/ix';
@@ -391,8 +389,8 @@ private function parseTableCommentFromSQL(string $table, string $sql): ?string
 
     private function parseColumnCommentFromSQL(string $column, string $sql): string
     {
-        $pattern = '{[\s(,](?:\W' . preg_quote($this->platform->quoteSingleIdentifier($column))
-            . '\W|\W' . preg_quote($column) . '\W)(?:\([^)]*?\)|[^,(])*?,?((?:(?!\n))(?:\s*--[^\n]*\n?)+)}i';
+        $pattern = '{[\s(,]' . $this->buildIdentifierPattern($column)
+            . '(?:\([^)]*?\)|[^,(])*?,?((?:(?!\n))(?:\s*--[^\n]*\n?)+)}i';
 
         if (preg_match($pattern, $sql, $match) !== 1) {
             return '';
@@ -404,6 +402,22 @@ private function parseColumnCommentFromSQL(string $column, string $sql): string
         return $comment;
     }
 
+    /**
+     * Returns a regular expression pattern that matches the given unquoted or quoted identifier.
+     */
+    private function buildIdentifierPattern(string $identifier): string
+    {
+        return '(?:' . implode('|', array_map(
+            static function (string $sql): string {
+                return '\W' . preg_quote($sql, '/') . '\W';
+            },
+            [
+                $identifier,
+                $this->platform->quoteSingleIdentifier($identifier),
+            ],
+        )) . ')';
+    }
+
     /** @throws Exception */
     private function getCreateTableSQL(string $table): string
     {

tests/Functional/Schema/SQLiteSchemaManagerTest.php

@@ -392,4 +392,25 @@ public function testShorthandInForeignKeyReferenceWithMultipleColumns(): void
             $createTableTrackSql,
         );
     }
+
+    /**
+     * This test duplicates {@see parent::testCommentInTable()} with the only difference that the name of the table
+     * being created is quoted. It is only meant to cover the logic of parsing the SQLite CREATE TABLE statement
+     * when the table name is quoted.
+     *
+     * Running the same test for all platforms, on the one hand, won't produce additional coverage, and on the other,
+     * is not feasible due to the differences in case sensitivity depending on whether the name is quoted.
+     *
+     * Once all identifiers are quoted by default, this test can be removed.
+     */
+    public function testCommentInQuotedTable(): void
+    {
+        $table = new Table('"table_with_comment"');
+        $table->addColumn('id', Types::INTEGER);
+        $table->setComment('This is a comment');
+        $this->dropAndCreateTable($table);
+
+        $table = $this->schemaManager->introspectTable('table_with_comment');
+        self::assertSame('This is a comment', $table->getComment());
+    }
 }