diff --git a/CHANGELOG.md b/CHANGELOG.md
index f92de014..99610dd1 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -2,7 +2,7 @@
 
 ## 1.1.1 under development
 
-- no changes in this release.
+- Enh #281: Remove unused code in `Command` class (@vjik)
 
 ## 1.1.0 November 12, 2023
 
diff --git a/src/AbstractTokenizer.php b/src/AbstractTokenizer.php
index 7febb90b..effa5a31 100644
--- a/src/AbstractTokenizer.php
+++ b/src/AbstractTokenizer.php
@@ -101,7 +101,6 @@ public function tokenize(): SqlToken
         $token[] = (new SqlToken())->type(SqlToken::TYPE_STATEMENT);
 
         $this->tokenStack->push($token[0]);
-        /** @psalm-var SqlToken */
         $this->currentToken = $this->tokenStack->top();
         $length = 0;
 
diff --git a/src/Builder/JsonExpressionBuilder.php b/src/Builder/JsonExpressionBuilder.php
index 73ef7c91..219d88e0 100644
--- a/src/Builder/JsonExpressionBuilder.php
+++ b/src/Builder/JsonExpressionBuilder.php
@@ -41,7 +41,6 @@ public function __construct(private QueryBuilderInterface $queryBuilder)
      */
     public function build(ExpressionInterface $expression, array &$params = []): string
     {
-        /** @psalm-var mixed $value */
         $value = $expression->getValue();
 
         if ($value instanceof QueryInterface) {
diff --git a/src/Command.php b/src/Command.php
index aa8176dc..6996cd7f 100644
--- a/src/Command.php
+++ b/src/Command.php
@@ -41,7 +41,6 @@ public function insertWithReturningPks(string $table, array $columns): bool|arra
                 continue;
             }
 
-            /** @psalm-var mixed */
             $result[$name] = $columns[$name] ?? $tableSchema?->getColumn($name)?->getDefaultValue();
         }
 
@@ -72,7 +71,6 @@ public function execute(): int
     {
         $sql = $this->getSql();
 
-        /** @psalm-var array<string, string> $params */
         $params = $this->params;
 
         $statements = $this->splitStatements($sql, $params);
@@ -83,11 +81,8 @@ public function execute(): int
 
         $result = 0;
 
-        /** @psalm-var array<array-key, array<array-key, string|array>> $statements */
         foreach ($statements as $statement) {
             [$statementSql, $statementParams] = $statement;
-            $statementSql = is_string($statementSql) ? $statementSql : '';
-            $statementParams = is_array($statementParams) ? $statementParams : [];
             $this->setSql($statementSql)->bindValues($statementParams);
             $result = parent::execute();
         }
@@ -111,7 +106,6 @@ protected function queryInternal(int $queryMode): mixed
     {
         $sql = $this->getSql();
 
-        /** @psalm-var array<string, string> $params */
         $params = $this->params;
 
         $statements = $this->splitStatements($sql, $params);
@@ -122,14 +116,7 @@ protected function queryInternal(int $queryMode): mixed
 
         [$lastStatementSql, $lastStatementParams] = array_pop($statements);
 
-        /**
-         * @psalm-var array<array-key, array> $statements
-         */
         foreach ($statements as $statement) {
-            /**
-             * @psalm-var string $statementSql
-             * @psalm-var array $statementParams
-             */
             [$statementSql, $statementParams] = $statement;
             $this->setSql($statementSql)->bindValues($statementParams);
             parent::execute();
@@ -137,7 +124,6 @@ protected function queryInternal(int $queryMode): mixed
 
         $this->setSql($lastStatementSql)->bindValues($lastStatementParams);
 
-        /** @psalm-var string $result */
         $result = parent::queryInternal($queryMode);
 
         $this->setSql($sql)->bindValues($params);
@@ -155,8 +141,6 @@ protected function queryInternal(int $queryMode): mixed
      *
      * @return array|bool List of SQL statements or `false` if there's a single statement.
      *
-     * @psalm-param array<string, string> $params
-     *
      * @psalm-return false|list<array{0: string, 1: array}>
      */
     private function splitStatements(string $sql, array $params): bool|array
@@ -186,8 +170,6 @@ private function splitStatements(string $sql, array $params): bool|array
 
     /**
      * Returns named bindings used in the specified statement token.
-     *
-     * @psalm-param array<string, string> $params
      */
     private function extractUsedParams(SqlToken $statement, array $params): array
     {
diff --git a/src/DMLQueryBuilder.php b/src/DMLQueryBuilder.php
index 798697a0..e772a598 100644
--- a/src/DMLQueryBuilder.php
+++ b/src/DMLQueryBuilder.php
@@ -56,7 +56,7 @@ public function upsert(
         bool|array $updateColumns,
         array &$params
     ): string {
-        /** @psalm-var Constraint[] $constraints */
+        /** @var Constraint[] $constraints */
         $constraints = [];
 
         [$uniqueNames, $insertNames, $updateNames] = $this->prepareUpsertColumns(
diff --git a/src/DQLQueryBuilder.php b/src/DQLQueryBuilder.php
index 753e9504..1faa2b0c 100644
--- a/src/DQLQueryBuilder.php
+++ b/src/DQLQueryBuilder.php
@@ -46,7 +46,6 @@ public function build(QueryInterface $query, array $params = []): array
         $sql = $this->buildOrderByAndLimit($sql, $orderBy, $query->getLimit(), $query->getOffset());
 
         if (!empty($orderBy)) {
-            /** @psalm-var array<string|ExpressionInterface> $orderBy */
             foreach ($orderBy as $expression) {
                 if ($expression instanceof ExpressionInterface) {
                     $this->buildExpression($expression, $params);
@@ -57,7 +56,6 @@ public function build(QueryInterface $query, array $params = []): array
         $groupBy = $query->getGroupBy();
 
         if (!empty($groupBy)) {
-            /** @psalm-var array<string|ExpressionInterface> $groupBy */
             foreach ($groupBy as $expression) {
                 if ($expression instanceof ExpressionInterface) {
                     $this->buildExpression($expression, $params);
diff --git a/src/QueryBuilder.php b/src/QueryBuilder.php
index 3aa810b1..4f867bd2 100644
--- a/src/QueryBuilder.php
+++ b/src/QueryBuilder.php
@@ -14,9 +14,7 @@
 final class QueryBuilder extends AbstractQueryBuilder
 {
     /**
-     * @var array Mapping from abstract column types (keys) to physical column types (values).
-     *
-     * @psalm-var string[] $typeMap
+     * @var string[] Mapping from abstract column types (keys) to physical column types (values).
      */
     protected array $typeMap = [
         SchemaInterface::TYPE_PK => 'integer PRIMARY KEY AUTOINCREMENT NOT NULL',
diff --git a/src/Schema.php b/src/Schema.php
index ef856721..57134f1a 100644
--- a/src/Schema.php
+++ b/src/Schema.php
@@ -72,9 +72,7 @@
 final class Schema extends AbstractPdoSchema
 {
     /**
-     * @var array Mapping from physical column types (keys) to abstract column types (values).
-     *
-     * @psalm-var array<array-key, string> $typeMap
+     * @var string[] Mapping from physical column types (keys) to abstract column types (values).
      */
     private array $typeMap = [
         'tinyint' => self::TYPE_TINYINT,
@@ -218,7 +216,6 @@ protected function loadTableForeignKeys(string $tableName): array
                     $primaryKey = $this->getTablePrimaryKey($table);
 
                     if ($primaryKey !== null) {
-                        /** @psalm-var string $primaryKeyColumnName */
                         foreach ((array) $primaryKey->getColumnNames() as $i => $primaryKeyColumnName) {
                             $foreignKey[$i]['to'] = $primaryKeyColumnName;
                         }
@@ -303,7 +300,6 @@ protected function loadTableChecks(string $tableName): array
 
         $sql = ($sql === false || $sql === null) ? '' : (string) $sql;
 
-        /** @psalm-var SqlToken[]|SqlToken[][]|SqlToken[][][] $code */
         $code = (new SqlTokenizer($sql))->tokenize();
         $pattern = (new SqlTokenizer('any CREATE any TABLE any()'))->tokenize();
         $result = [];
@@ -363,7 +359,6 @@ protected function loadTableDefaultValues(string $tableName): array
      */
     protected function findColumns(TableSchemaInterface $table): bool
     {
-        /** @psalm-var ColumnInfo[] $columns */
         $columns = $this->getPragmaTableInfo($table->getName());
         $jsonColumns = $this->getJsonColumns($table);
 
@@ -444,7 +439,6 @@ public function findUniqueIndexes(TableSchemaInterface $table): array
 
         foreach ($indexList as $index) {
             $indexName = $index['name'];
-            /** @psalm-var IndexInfo[] $indexInfo */
             $indexInfo = $this->getPragmaIndexInfo($index['name']);
 
             if ($index['unique']) {
@@ -551,6 +545,8 @@ private function normalizeDefaultValue(string|null $defaultValue, ColumnSchemaIn
      * @throws Throwable
      *
      * @return array The table columns info.
+     *
+     * @psalm-return ColumnInfo[] $tableColumns;
      */
     private function loadTableColumnsInfo(string $tableName): array
     {
@@ -558,6 +554,7 @@ private function loadTableColumnsInfo(string $tableName): array
         /** @psalm-var ColumnInfo[] $tableColumns */
         $tableColumns = $this->normalizeRowKeyCase($tableColumns, true);
 
+        /** @psalm-var ColumnInfo[] */
         return DbArrayHelper::index($tableColumns, 'cid');
     }
 
@@ -585,7 +582,6 @@ private function loadTableConstraints(string $tableName, string $returnType): Co
         ];
 
         foreach ($indexes as $index) {
-            /** @psalm-var IndexInfo[] $columns */
             $columns = $this->getPragmaIndexInfo($index['name']);
 
             if ($index['origin'] === 'pk') {
@@ -611,8 +607,6 @@ private function loadTableConstraints(string $tableName, string $returnType): Co
              * Extra check for PK in case of `INTEGER PRIMARY KEY` with ROWID.
              *
              * @link https://www.sqlite.org/lang_createtable.html#primkeyconst
-             *
-             * @psalm-var ColumnInfo[] $tableColumns
              */
             $tableColumns = $this->loadTableColumnsInfo($tableName);
 
@@ -659,16 +653,18 @@ private function getPragmaForeignKeyList(string $tableName): array
      * @throws Exception
      * @throws InvalidConfigException
      * @throws Throwable
+     *
+     * @psalm-return IndexInfo[]
      */
     private function getPragmaIndexInfo(string $name): array
     {
         $column = $this->db
             ->createCommand('PRAGMA INDEX_INFO(' . (string) $this->db->getQuoter()->quoteValue($name) . ')')
             ->queryAll();
-        /** @psalm-var IndexInfo[] $column */
         $column = $this->normalizeRowKeyCase($column, true);
         DbArrayHelper::multisort($column, 'seqno');
 
+        /** @psalm-var IndexInfo[] $column */
         return $column;
     }
 
@@ -688,9 +684,12 @@ private function getPragmaIndexList(string $tableName): array
      * @throws Exception
      * @throws InvalidConfigException
      * @throws Throwable
+     *
+     * @psalm-return ColumnInfo[]
      */
     private function getPragmaTableInfo(string $tableName): array
     {
+        /** @psalm-var ColumnInfo[] */
         return $this->db->createCommand(
             'PRAGMA TABLE_INFO(' . $this->db->getQuoter()->quoteSimpleTableName($tableName) . ')'
         )->queryAll();
@@ -703,7 +702,7 @@ private function getPragmaTableInfo(string $tableName): array
      */
     protected function findViewNames(string $schema = ''): array
     {
-        /** @psalm-var string[][] $views */
+        /** @var string[][] $views */
         $views = $this->db->createCommand(
             <<<SQL
             SELECT name as view FROM sqlite_master WHERE type = 'view' AND name NOT LIKE 'sqlite_%'