[10.x] Replace Deprecated DBAL Comparator creation with schema aware Comparator

src/Illuminate/Database/Schema/Grammars/ChangeColumn.php

@@ -3,7 +3,6 @@
 namespace Illuminate\Database\Schema\Grammars;
 
 use Doctrine\DBAL\Schema\AbstractSchemaManager as SchemaManager;
-use Doctrine\DBAL\Schema\Comparator;
 use Doctrine\DBAL\Schema\Table;
 use Doctrine\DBAL\Types\Type;
 use Illuminate\Database\Connection;
@@ -60,7 +59,7 @@ protected static function getChangedDiff($grammar, Blueprint $blueprint, SchemaM
     {
         $current = $schema->introspectTable($grammar->getTablePrefix().$blueprint->getTable());
 
-        return (new Comparator)->compareTables(
+        return $schema->createComparator()->compareTables(
             $current, static::getTableWithColumnChanges($blueprint, $current)
         );
     }

src/Illuminate/Database/Schema/Grammars/Grammar.php

@@ -323,11 +323,11 @@ protected function getDefaultValue($value)
      */
     public function getDoctrineTableDiff(Blueprint $blueprint, SchemaManager $schema)
     {
-        $table = $this->getTablePrefix().$blueprint->getTable();
+        $tableName = $this->getTablePrefix().$blueprint->getTable();
 
-        return tap(new TableDiff($table), function ($tableDiff) use ($schema, $table) {
-            $tableDiff->fromTable = $schema->introspectTable($table);
-        });
+        $table = $schema->introspectTable($tableName);
+
+        return new TableDiff(tableName: $tableName, fromTable: $table);
     }
 
     /**

tests/Database/DatabaseSchemaBlueprintIntegrationTest.php

@@ -61,6 +61,18 @@ public function testRenamingAndChangingColumnsWork()
 
         // Expect one of the following two query sequences to be present...
         $expected = [
+            [
+                'CREATE TEMPORARY TABLE __temp__users AS SELECT name, age FROM users',
+                'DROP TABLE users',
+                'CREATE TABLE users (name VARCHAR(255) NOT NULL, age INTEGER NOT NULL)',
+                'INSERT INTO users (name, age) SELECT name, age FROM __temp__users',
+                'DROP TABLE __temp__users',
+                'CREATE TEMPORARY TABLE __temp__users AS SELECT name, age FROM users',
+                'DROP TABLE users',
+                'CREATE TABLE users (first_name VARCHAR(255) NOT NULL, age VARCHAR(255) NOT NULL COLLATE "BINARY")',
+                'INSERT INTO users (first_name, age) SELECT name, age FROM __temp__users',
+                'DROP TABLE __temp__users',
+            ],
             [
                 'CREATE TEMPORARY TABLE __temp__users AS SELECT name, age FROM users',
                 'DROP TABLE users',
@@ -327,6 +339,13 @@ public function testChangingCharColumnsWork()
         $queries = $blueprint->toSql($this->db->connection(), new SQLiteGrammar);
 
         $expected = [
+            [
+                'CREATE TEMPORARY TABLE __temp__users AS SELECT name FROM users',
+                'DROP TABLE users',
+                'CREATE TABLE users (name CHAR(50) NOT NULL)',
+                'INSERT INTO users (name) SELECT name FROM __temp__users',
+                'DROP TABLE __temp__users',
+            ],
             [
                 'CREATE TEMPORARY TABLE __temp__users AS SELECT name FROM users',
                 'DROP TABLE users',

tests/Integration/Database/SchemaBuilderTest.php

@@ -112,4 +112,29 @@ public function testChangeToTextColumn()
             $this->assertEquals($expected, $queries);
         }
     }
+
+    public function testChangeTextColumnToTextColumn()
+    {
+        if ($this->driver !== 'mysql') {
+            $this->markTestSkipped('Test requires a MySQL connection.');
+        }
+
+        Schema::create('test', static function (Blueprint $table) {
+            $table->text('test_column');
+        });
+
+        foreach (['tinyText', 'mediumText', 'longText'] as $type) {
+            $blueprint = new Blueprint('test', function ($table) use ($type) {
+                $table->$type('test_column')->change();
+            });
+
+            $queries = $blueprint->toSql($this->getConnection(), $this->getConnection()->getSchemaGrammar());
+
+            $uppercase = strtoupper($type);
+
+            $expected = ["ALTER TABLE test CHANGE test_column test_column $uppercase NOT NULL"];
+
+            $this->assertEquals($expected, $queries);
+        }
+    }
 }