diff --git a/engine/agnostic/change.go b/engine/agnostic/change.go
index d074787..9d1d036 100644
--- a/engine/agnostic/change.go
+++ b/engine/agnostic/change.go
@@ -39,7 +39,7 @@ func (t *Transaction) rollbackValueChange(c ValueChange) {
 	if c.current != nil && c.old != nil {
 		cur := c.current.Value.(*Tuple)
 		old := c.old.Value.(*Tuple)
-		for i, _ := range cur.values {
+		for i := range cur.values {
 			cur.values[i] = old.values[i]
 		}
 	}
diff --git a/engine/agnostic/relation.go b/engine/agnostic/relation.go
index d1c70bd..9a42f4a 100644
--- a/engine/agnostic/relation.go
+++ b/engine/agnostic/relation.go
@@ -62,7 +62,7 @@ func (r *Relation) CheckPrimaryKey(tuple *Tuple) (bool, error) {
 	}
 
 	var index Index
-	for i, _ := range r.indexes {
+	for i := range r.indexes {
 		if strings.HasPrefix(r.indexes[i].Name(), "pk") {
 			index = r.indexes[i]
 			break
@@ -135,7 +135,7 @@ func (r *Relation) Truncate() int64 {
 	return int64(l)
 }
 
-func (r Relation) String() string {
+func (r *Relation) String() string {
 	if r.schema != "" {
 		return r.schema + "." + r.name
 	}
diff --git a/engine/agnostic/tuple.go b/engine/agnostic/tuple.go
index 26cdc28..ee93d0f 100644
--- a/engine/agnostic/tuple.go
+++ b/engine/agnostic/tuple.go
@@ -9,9 +9,7 @@ type Tuple struct {
 func NewTuple(values ...any) *Tuple {
 	t := &Tuple{}
 
-	for _, v := range values {
-		t.values = append(t.values, v)
-	}
+	t.values = append(t.values, values...)
 	return t
 }
 
diff --git a/engine/parser/lexer.go b/engine/parser/lexer.go
index 6e82c03..8bdbc07 100644
--- a/engine/parser/lexer.go
+++ b/engine/parser/lexer.go
@@ -504,7 +504,7 @@ func (l *lexer) MatchEscapedStringToken() bool {
 	escaped := l.instruction[l.pos+2 : i-1]
 
 	for _, r := range escaped {
-		if unicode.IsDigit(rune(r)) == false {
+		if !unicode.IsDigit(rune(r)) {
 			tok = StringToken
 		}
 	}
diff --git a/engine/parser/select.go b/engine/parser/select.go
index cd71d12..445cc15 100644
--- a/engine/parser/select.go
+++ b/engine/parser/select.go
@@ -132,7 +132,7 @@ func (p *parser) parseSelect(tokens []Token) (*Instruction, error) {
 			}
 			hazWhereClause = true
 		case OrderToken:
-			if hazWhereClause == false {
+			if !hazWhereClause {
 				// WHERE clause is implicit
 				addImplicitWhereAll(selectDecl)
 			}