Fix hasTable() returning stale results when mixing API and execute() (#982)

When a table was created via the API (e.g. $this->table()->create()) and
then dropped via execute() (raw SQL), hasTable() would incorrectly return
true because it checked an internal cache before querying the database.

This fix limits the cache usage to dry-run mode only, where it's necessary
to track what tables "would" exist. In normal mode, hasTable() now always
queries the database to ensure accurate results.

Also fixes SqlserverAdapter to pass the table name without schema prefix
to the dialect, which was a latent bug hidden by the cache.

Author: dereuromark

src/Db/Adapter/MysqlAdapter.php

@@ -203,7 +203,10 @@ public function quoteTableName(string $tableName): string
      */
     public function hasTable(string $tableName): bool
     {
-        if ($this->hasCreatedTable($tableName)) {
+        // Only use the cache in dry-run mode where tables aren't actually created.
+        // In normal mode, always check the database to handle cases where tables
+        // are dropped via execute() which doesn't update the cache.
+        if ($this->isDryRunEnabled() && $this->hasCreatedTable($tableName)) {
             return true;
         }
 

src/Db/Adapter/PostgresAdapter.php

@@ -100,9 +100,13 @@ public function quoteTableName(string $tableName): string
      */
     public function hasTable(string $tableName): bool
     {
-        if ($this->hasCreatedTable($tableName)) {
+        // Only use the cache in dry-run mode where tables aren't actually created.
+        // In normal mode, always check the database to handle cases where tables
+        // are dropped via execute() which doesn't update the cache.
+        if ($this->isDryRunEnabled() && $this->hasCreatedTable($tableName)) {
             return true;
         }
+
         $parts = $this->getSchemaName($tableName);
         $tableName = $parts['table'];
 

src/Db/Adapter/SqliteAdapter.php

@@ -229,7 +229,14 @@ protected function resolveTable(string $tableName): array
      */
     public function hasTable(string $tableName): bool
     {
-        return $this->hasCreatedTable($tableName) || $this->resolveTable($tableName)['exists'];
+        // Only use the cache in dry-run mode where tables aren't actually created.
+        // In normal mode, always check the database to handle cases where tables
+        // are dropped via execute() which doesn't update the cache.
+        if ($this->isDryRunEnabled() && $this->hasCreatedTable($tableName)) {
+            return true;
+        }
+
+        return $this->resolveTable($tableName)['exists'];
     }
 
     /**

src/Db/Adapter/SqlserverAdapter.php

@@ -67,13 +67,17 @@ public function quoteTableName(string $tableName): string
      */
     public function hasTable(string $tableName): bool
     {
-        if ($this->hasCreatedTable($tableName)) {
+        // Only use the cache in dry-run mode where tables aren't actually created.
+        // In normal mode, always check the database to handle cases where tables
+        // are dropped via execute() which doesn't update the cache.
+        if ($this->isDryRunEnabled() && $this->hasCreatedTable($tableName)) {
             return true;
         }
+
         $parts = $this->getSchemaName($tableName);
         $dialect = $this->getSchemaDialect();
 
-        return $dialect->hasTable($tableName, $parts['schema']);
+        return $dialect->hasTable($parts['table'], $parts['schema']);
     }
 
     /**

tests/TestCase/Db/Adapter/SqliteAdapterTest.php

@@ -2402,6 +2402,27 @@ public static function provideTableNamesForPresenceCheck()
         ];
     }
 
+    /**
+     * Test that hasTable() returns false after a table is dropped via execute().
+     *
+     * This verifies that hasTable() always checks the database rather than
+     * relying on an internal cache that could become stale when raw SQL is used.
+     */
+    public function testHasTableAfterExecuteDrop(): void
+    {
+        // Create table via API
+        $table = new Table('cache_test', [], $this->adapter);
+        $table->addColumn('name', 'string')
+              ->save();
+
+        $this->assertTrue($this->adapter->hasTable('cache_test'));
+
+        // Drop via execute() - hasTable() must still return false
+        $this->adapter->execute('DROP TABLE "cache_test"');
+
+        $this->assertFalse($this->adapter->hasTable('cache_test'));
+    }
+
     #[DataProvider('provideIndexColumnsToCheck')]
     public function testHasIndex($tableDef, $cols, $exp)
     {