fix server errs

Author: elianddb

enginetest/queries/script_queries.go

@@ -129,7 +129,7 @@ var ScriptTests = []ScriptTest{
 		},
 		Assertions: []ScriptTestAssertion{
 			{
-				// Test UNION with BIT column and integer constant (related to customer's "48 is beyond maximum value" error)
+				// Reproduces customer's "48 is beyond maximum value" error when BIT and integer constants are UNIONed
 				Query: `SELECT archived FROM report_card WHERE id = 1
 					UNION ALL  
 					SELECT 48 FROM report_card WHERE id = 1`,
@@ -181,8 +181,8 @@ var ScriptTests = []ScriptTest{
 					WHERE archived = FALSE AND id <> 1
 				) AS dummy_alias`,
 				Expected: []sql.Row{
-					{int64(5), int64(1), "Card1", uint64(0), int64(0), int64(2)},
-					{int64(7), int64(2), "Collection1", uint64(0), nil, int64(2)},
+					{int64(5), int64(1), "Card1", int64(0), int64(0), int64(2)},
+					{int64(7), int64(2), "Collection1", int64(0), nil, int64(2)},
 				},
 			},
 		},

go.mod

@@ -6,7 +6,7 @@ require (
 	github.com/dolthub/go-icu-regex v0.0.0-20250327004329-6799764f2dad
 	github.com/dolthub/jsonpath v0.0.2-0.20240227200619-19675ab05c71
 	github.com/dolthub/sqllogictest/go v0.0.0-20201107003712-816f3ae12d81
-	github.com/dolthub/vitess v0.0.0-20250730174048-497aebb8cea7
+	github.com/dolthub/vitess v0.0.0-20250813175212-45844169a751
 	github.com/go-sql-driver/mysql v1.7.2-0.20231213112541-0004702b931d
 	github.com/gocraft/dbr/v2 v2.7.2
 	github.com/google/uuid v1.3.0

go.sum

@@ -20,6 +20,8 @@ github.com/dolthub/sqllogictest/go v0.0.0-20201107003712-816f3ae12d81 h1:7/v8q9X
 github.com/dolthub/sqllogictest/go v0.0.0-20201107003712-816f3ae12d81/go.mod h1:siLfyv2c92W1eN/R4QqG/+RjjX5W2+gCTRjZxBjI3TY=
 github.com/dolthub/vitess v0.0.0-20250730174048-497aebb8cea7 h1:l+mWO0xoh4eG1J9gMS87opL6N6WGAQitF36R/Lg4bWs=
 github.com/dolthub/vitess v0.0.0-20250730174048-497aebb8cea7/go.mod h1:1gQZs/byeHLMSul3Lvl3MzioMtOW1je79QYGyi2fd70=
+github.com/dolthub/vitess v0.0.0-20250813175212-45844169a751 h1:BBQKyvyODewdQxS+ICklMn1d/fFj2pVlkmMN1QFY4ms=
+github.com/dolthub/vitess v0.0.0-20250813175212-45844169a751/go.mod h1:1gQZs/byeHLMSul3Lvl3MzioMtOW1je79QYGyi2fd70=
 github.com/go-sql-driver/mysql v1.4.1/go.mod h1:zAC/RDZ24gD3HViQzih4MyKcchzm+sOG5ZlKdlhCg5w=
 github.com/go-sql-driver/mysql v1.5.0/go.mod h1:DCzpHaOWr8IXmIStZouvnhqoel9Qv2LBy8hT2VhHyBg=
 github.com/go-sql-driver/mysql v1.6.0/go.mod h1:DCzpHaOWr8IXmIStZouvnhqoel9Qv2LBy8hT2VhHyBg=

sql/analyzer/resolve_unions.go

@@ -100,7 +100,7 @@ func finalizeUnions(ctx *sql.Context, a *Analyzer, n sql.Node, scope *plan.Scope
 			return nil, transform.SameTree, err
 		}
 
-		// UNION operations can return multiple rows, so Max1Row optimization is invalid
+		// UNION can return multiple rows even when child queries use LIMIT 1, so disable Max1Row optimization
 		qFlags.Unset(sql.QFlagMax1Row)
 
 		return newN, transform.NewTree, nil