Resolve Psalm error

Author: Javakky-pxv

src/Parser/SQLParser.php

@@ -2,15 +2,14 @@
 namespace Vimeo\MysqlEngine\Parser;
 
 use Vimeo\MysqlEngine\TokenType;
-use Vimeo\MysqlEngine\Query\{
-    SelectQuery,
+use Vimeo\MysqlEngine\Query\{SelectQuery,
     DeleteQuery,
+    ShowIndexQuery,
     TruncateQuery,
     InsertQuery,
     UpdateQuery,
     DropTableQuery,
-    ShowTablesQuery
-};
+    ShowTablesQuery};
 
 final class SQLParser
 {
@@ -142,10 +141,11 @@ final class SQLParser
         'TABLES' => true,
     ];
 
+    /** @var array<SelectQuery|InsertQuery|UpdateQuery|TruncateQuery|DeleteQuery|DropTableQuery|ShowTablesQuery|ShowIndexQuery> */
     private static $cache = [];
 
     /**
-     * @return SelectQuery|InsertQuery|UpdateQuery|TruncateQuery|DeleteQuery|DropTableQuery|ShowTablesQuery
+     * @return SelectQuery|InsertQuery|UpdateQuery|TruncateQuery|DeleteQuery|DropTableQuery|ShowTablesQuery|ShowIndexQuery
      */
     public static function parse(string $sql)
     {
@@ -157,7 +157,7 @@ public static function parse(string $sql)
     }
 
     /**
-     * @return SelectQuery|InsertQuery|UpdateQuery|TruncateQuery|DeleteQuery|DropTableQuery|ShowTablesQuery
+     * @return SelectQuery|InsertQuery|UpdateQuery|TruncateQuery|DeleteQuery|DropTableQuery|ShowTablesQuery|ShowIndexQuery
      */
     private static function parseImpl(string $sql)
     {

src/Parser/ShowParser.php

@@ -88,7 +88,7 @@ private function parseShowIndex(): ShowIndexQuery
         }
         $this->pointer++;
         $token = $this->tokens[$this->pointer];
-        if ($token === null || $token->type !== TokenType::IDENTIFIER) {
+        if ($token->type !== TokenType::IDENTIFIER) {
             throw new ParserException("Expected table name after FROM");
         }
 

src/Processor/ShowIndexProcessor.php

@@ -7,6 +7,7 @@
 use Vimeo\MysqlEngine\FakePdoInterface;
 use Vimeo\MysqlEngine\Query\ShowIndexQuery;
 use Vimeo\MysqlEngine\Schema\Column;
+use function PHPUnit\Framework\assertIsArray;
 
 class ShowIndexProcessor extends Processor
 {
@@ -20,15 +21,18 @@ public static function process(
             $database,
             $table
         );
+        if (!$table_definition) {
+            return new QueryResult([], []);
+        }
         $columns = [
             'Table' => new Column\Varchar(255),
             'Non_unique' => new Column\TinyInt(true, 1),
             'Key_name' => new Column\Varchar(255),
-            'Seq_in_index' => new Column\intColumn(true, 4),
+            'Seq_in_index' => new Column\IntColumn(true, 4),
             'Column_name' => new Column\Varchar(255),
             'Collation' => new Column\Char(1),
-            'Cardinality' => new Column\intColumn(true, 4),
-            'Sub_part' => new Column\intColumn(true, 4),
+            'Cardinality' => new Column\IntColumn(true, 4),
+            'Sub_part' => new Column\IntColumn(true, 4),
             'Packed' => new Column\TinyInt(true, 1),
             'Null' => new Column\Varchar(3),
             'Index_type' => new Column\Varchar(5),
@@ -42,7 +46,7 @@ public static function process(
                     'Table' => $table_definition->name,
                     'Non_unique' => $index->type === 'INDEX' ? 1 : 0,
                     'Key_name' => $name,
-                    'Seq_in_index' => $i + 1,
+                    'Seq_in_index' => 1 + (int) $i,
                     'Column_name' => $column,
                     // because Index does not have "direction" (in the $cols of CreateIndex)
                     'Collation' => null,

src/Query/ShowIndexQuery.php

@@ -1,6 +1,8 @@
 <?php
 namespace Vimeo\MysqlEngine\Query;
 
+use Vimeo\MysqlEngine\Query\Expression\Expression;
+
 final class ShowIndexQuery
 {
     /**

src/Schema/Index.php

@@ -9,12 +9,13 @@ class Index
     public $type;
 
     /**
-     * @var array
+     * @var array<string>
      */
     public $columns;
 
     /**
      * @param 'INDEX'|'UNIQUE'|'PRIMARY'|'FULLTEXT'|'SPATIAL' $type
+     * @param array<string> $columns
      */
     public function __construct(
         string $type,