fix: resolve parser bugs and upgrade CI to Go 1.25

.github/workflows/ci.yml

@@ -17,7 +17,7 @@ jobs:
       - name: Set up Go
         uses: actions/setup-go@v4
         with:
-          go-version: "1.24.3"
+          go-version: "1.25"
 
       - name: Install dependencies
         run: go mod download
@@ -46,7 +46,7 @@ jobs:
       - name: Set up Go
         uses: actions/setup-go@v4
         with:
-          go-version: "1.24.3"
+          go-version: "1.25"
 
       - name: Install dependencies
         run: go mod download
@@ -74,7 +74,7 @@ jobs:
       - name: Set up Go
         uses: actions/setup-go@v4
         with:
-          go-version: "1.24.3"
+          go-version: "1.25"
 
       - name: Install dependencies
         run: go mod download
@@ -94,7 +94,7 @@ jobs:
       - name: Set up Go
         uses: actions/setup-go@v4
         with:
-          go-version: "1.24.3"
+          go-version: "1.25"
 
       - name: Install dependencies
         run: go mod download

.github/workflows/release.yml

@@ -16,7 +16,7 @@ jobs:
       - name: Set up Go
         uses: actions/setup-go@v4
         with:
-          go-version: "1.24.3"
+          go-version: "1.25"
 
       - name: Install dependencies
         run: go mod download

pkg/parser/advanced_features.go

@@ -361,7 +361,6 @@ func (p *Parser) parseCaseExpression() (*CaseExpression, error) {
 			return nil, fmt.Errorf("failed to parse CASE input: %v", err)
 		}
 		ce.Input = input
-		p.nextToken()
 	}
 
 	// Parse WHEN clauses
@@ -385,7 +384,6 @@ func (p *Parser) parseCaseExpression() (*CaseExpression, error) {
 			return nil, fmt.Errorf("failed to parse ELSE result: %v", err)
 		}
 		ce.ElseResult = elseResult
-		p.nextToken()
 	}
 
 	// Expect END keyword
@@ -412,7 +410,6 @@ func (p *Parser) parseWhenClause() (*WhenClause, error) {
 		return nil, fmt.Errorf("failed to parse WHEN condition: %v", err)
 	}
 	wc.Condition = condition
-	p.nextToken()
 
 	// Expect THEN keyword
 	if !p.curTokenIs(lexer.THEN) {
@@ -426,7 +423,6 @@ func (p *Parser) parseWhenClause() (*WhenClause, error) {
 		return nil, fmt.Errorf("failed to parse THEN result: %v", err)
 	}
 	wc.Result = result
-	p.nextToken()
 
 	return wc, nil
 }

pkg/parser/parser.go

@@ -488,10 +488,9 @@ func (p *Parser) parseOrderByClause() ([]*OrderByClause, error) {
 	}
 
 	p.nextToken()
-	if !p.expectPeek(lexer.BY) {
-		return nil, fmt.Errorf("expected BY after ORDER")
+	if !p.curTokenIs(lexer.BY) {
+		return nil, fmt.Errorf("expected BY after ORDER, got %s", p.curToken.Literal)
 	}
-
 	p.nextToken()
 
 	var clauses []*OrderByClause
@@ -822,9 +821,10 @@ func (p *Parser) parseGroupedExpression() (Expression, error) {
 		return nil, err
 	}
 
-	if !p.expectPeek(lexer.RPAREN) {
-		return nil, fmt.Errorf("expected ')' to close grouped expression")
+	if !p.curTokenIs(lexer.RPAREN) {
+		return nil, fmt.Errorf("expected ')' to close grouped expression, got %s", p.curToken.Literal)
 	}
+	p.nextToken()
 
 	return exp, nil
 }

tests/dialect_benchmark_test.go

@@ -216,7 +216,7 @@ func BenchmarkComplexDialectQueries(b *testing.B) {
 			"INNER JOIN `ecommerce`.`orders` `o` ON `u`.`user_id` = `o`.`user_id` " +
 			"INNER JOIN `ecommerce`.`order_items` `oi` ON `o`.`order_id` = `oi`.`order_id` " +
 			"INNER JOIN `ecommerce`.`products` `p` ON `oi`.`product_id` = `p`.`product_id` " +
-			"WHERE `o`.`order_date` >= DATE_SUB(NOW(), INTERVAL 30 DAY) " +
+			"WHERE `o`.`order_date` >= '2024-01-01' " +
 			"AND `u`.`status` = 'active' " +
 			"AND `p`.`category` IN ('electronics', 'books', 'clothing') " +
 			"GROUP BY `u`.`user_id`, `u`.`username`, `p`.`name`, `oi`.`quantity`, `oi`.`price`, `o`.`order_date`, `o`.`status`, `o`.`total_amount` " +