fix(schema): narrow vector() return types and correct MongoDB dropView payload

Table\PostgreSQL/MongoDB/ClickHouse vector() declared base Column return; narrow
to Column\X to match the docblock and keep dialect-specific chaining type-safe
without a /** @var */ cast.

MongoDB dropView() emitted {command: 'drop', view: <name>}; the executor uses
'collection' as the target key for all drop commands (compileDrop already does
this). Switch to 'collection' for consistency and add a regression test.

Author: abnegate

src/Query/Schema/MongoDB.php

@@ -293,7 +293,7 @@ public function createView(string $name, Builder $query): Statement
     public function dropView(string $name): Statement
     {
         return new Statement(
-            \json_encode(['command' => 'drop', 'view' => $name], JSON_THROW_ON_ERROR),
+            \json_encode(['command' => 'drop', 'collection' => $name], JSON_THROW_ON_ERROR),
             [],
             executor: $this->executor,
         );

src/Query/Schema/Table/ClickHouse.php

@@ -22,12 +22,10 @@ protected function newColumn(string $name, ColumnType $type, ?int $length = null
         return new Column\ClickHouse($this, $name, $type, $length, $precision);
     }
 
-    /**
-     * @return Column\ClickHouse
-     */
-    public function vector(string $name, int $dimensions): Column
+    public function vector(string $name, int $dimensions): Column\ClickHouse
     {
-        $col = $this->newColumn($name, ColumnType::Vector)->dimensions($dimensions);
+        $col = $this->newColumn($name, ColumnType::Vector);
+        $col->dimensions($dimensions);
         $this->columns[] = $col;
 
         return $col;

src/Query/Schema/Table/MongoDB.php

@@ -18,12 +18,10 @@ protected function newColumn(string $name, ColumnType $type, ?int $length = null
         return new Column\MongoDB($this, $name, $type, $length, $precision);
     }
 
-    /**
-     * @return Column\MongoDB
-     */
-    public function vector(string $name, int $dimensions): Column
+    public function vector(string $name, int $dimensions): Column\MongoDB
     {
-        $col = $this->newColumn($name, ColumnType::Vector)->dimensions($dimensions);
+        $col = $this->newColumn($name, ColumnType::Vector);
+        $col->dimensions($dimensions);
         $this->columns[] = $col;
 
         return $col;

src/Query/Schema/Table/PostgreSQL.php

@@ -31,12 +31,10 @@ protected function newForeignKey(string $column): ForeignKey\PostgreSQL
         return new ForeignKey\PostgreSQL($this, $column);
     }
 
-    /**
-     * @return Column\PostgreSQL
-     */
-    public function vector(string $name, int $dimensions): Column
+    public function vector(string $name, int $dimensions): Column\PostgreSQL
     {
-        $col = $this->newColumn($name, ColumnType::Vector)->dimensions($dimensions);
+        $col = $this->newColumn($name, ColumnType::Vector);
+        $col->dimensions($dimensions);
         $this->columns[] = $col;
 
         return $col;

tests/Query/Schema/MongoDBTest.php

@@ -363,6 +363,17 @@ public function testCreateViewFromAggregation(): void
         $this->assertNotEmpty($pipeline);
     }
 
+    public function testDropView(): void
+    {
+        $schema = new Schema();
+        $result = $schema->dropView('active_users');
+
+        $op = $this->decode($result->query);
+        $this->assertSame('drop', $op['command']);
+        $this->assertSame('active_users', $op['collection']);
+        $this->assertArrayNotHasKey('view', $op);
+    }
+
     public function testCreateCollectionWithAllBsonTypes(): void
     {
         $schema = new Schema();