support no_auto_create_user sql_mode (#2769)

Co-authored-by: James Cor <[email protected]>

Author: jycor

enginetest/queries/variable_queries.go

@@ -328,6 +328,16 @@ var VariableQueries = []ScriptTest{
 			{"ALLOW_INVALID_DATES"},
 		},
 	},
+	{
+		Name: "set system variable to no_auto_create_user, which has been deprecated",
+		SetUpScript: []string{
+			`set sql_mode = NO_AUTO_CREATE_USER`,
+		},
+		Query: "SELECT @@sql_mode",
+		Expected: []sql.Row{
+			{"NO_AUTO_CREATE_USER"},
+		},
+	},
 	{
 		Name: "set sql_mode variable from mysqldump",
 		SetUpScript: []string{

sql/variables/system_variables.go

@@ -2438,7 +2438,7 @@ var systemVars = map[string]sql.SystemVariable{
 		Scope:             sql.GetMysqlScope(sql.SystemVariableScope_Both),
 		Dynamic:           true,
 		SetVarHintApplies: true,
-		Type:              types.NewSystemSetType("sql_mode", sql.Collation_utf8mb4_0900_ai_ci, "ALLOW_INVALID_DATES", "ANSI_QUOTES", "ERROR_FOR_DIVISION_BY_ZERO", "HIGH_NOT_PRECEDENCE", "IGNORE_SPACE", "NO_AUTO_VALUE_ON_ZERO", "NO_BACKSLASH_ESCAPES", "NO_DIR_IN_CREATE", "NO_ENGINE_SUBSTITUTION", "NO_UNSIGNED_SUBTRACTION", "NO_ZERO_DATE", "NO_ZERO_IN_DATE", "ONLY_FULL_GROUP_BY", "PAD_CHAR_TO_FULL_LENGTH", "PIPES_AS_CONCAT", "REAL_AS_FLOAT", "STRICT_ALL_TABLES", "STRICT_TRANS_TABLES", "TIME_TRUNCATE_FRACTIONAL", "TRADITIONAL", "ANSI"),
+		Type:              types.NewSystemSetType("sql_mode", sql.Collation_utf8mb4_0900_ai_ci, "ALLOW_INVALID_DATES", "ANSI_QUOTES", "ERROR_FOR_DIVISION_BY_ZERO", "HIGH_NOT_PRECEDENCE", "IGNORE_SPACE", "NO_AUTO_VALUE_ON_ZERO", "NO_AUTO_CREATE_USER", "NO_BACKSLASH_ESCAPES", "NO_DIR_IN_CREATE", "NO_ENGINE_SUBSTITUTION", "NO_UNSIGNED_SUBTRACTION", "NO_ZERO_DATE", "NO_ZERO_IN_DATE", "ONLY_FULL_GROUP_BY", "PAD_CHAR_TO_FULL_LENGTH", "PIPES_AS_CONCAT", "REAL_AS_FLOAT", "STRICT_ALL_TABLES", "STRICT_TRANS_TABLES", "TIME_TRUNCATE_FRACTIONAL", "TRADITIONAL", "ANSI"),
 		Default:           sql.DefaultSqlMode,
 	},
 	"sql_notes": &sql.MysqlSystemVariable{