fix type check bug

sqle/driver/mysql/audit_test.go

@@ -3061,6 +3061,10 @@ func TestCheckMultiSelectWhereExistImplicitConversion(t *testing.T) {
 		`select t1.v1 from exist_db.exist_tb_1 t1, exist_db.exist_tb_9 t2 where t2.v1 in (3)`,
 		`select t1.v1 from exist_db.exist_tb_1 t1, exist_db.exist_tb_9 where exist_tb_9.v1 in (3);`,
 		`select t1.v1 from exist_db.exist_tb_1 t1, exist_db.exist_tb_9 where exist_tb_9.v1 in (3, 2, 1);`,
+
+		`select * from exist_db.exist_tb_11 where create_time = '2020-01-01 00:00:00'`,
+		`select * from exist_db.exist_tb_11 where create_time >= 2020-01-01`,
+		`select * from exist_db.exist_tb_11 where year_time >= '2020'`,
 	} {
 		runSingleRuleInspectCase(rule, t, "multi select: check where exist implicit conversion", DefaultMysqlInspect(), sql, newTestResult())
 	}

sqle/driver/mysql/rule/rule.go

@@ -4949,6 +4949,14 @@ func checkWhereColumnImplicitConversionFunc(ctx *session.Context, rule driverV2.
 				if col.Name.Name.L != cn.Name.L {
 					continue
 				}
+
+				// datetime, date, timestamp, time, year 类型的列不做检查
+				// 因为这些类型的列不会发生隐式转换,mysql可以自动识别各种日期格式
+				switch col.Tp.Tp {
+				case mysql.TypeDatetime, mysql.TypeDate, mysql.TypeTimestamp, mysql.TypeDuration, mysql.TypeYear:
+					continue
+				}
+
 				for _, v := range values {
 					if !checkColumnTypeIsMatch(v, col.Tp.Tp) {
 						addResult(res, rule, DMLCheckWhereExistImplicitConversion)

sqle/driver/mysql/session/mock_context.go

@@ -85,6 +85,12 @@ func NewMockContext(e *executor.Executor) *Context {
 						Size:          1,
 						OriginalTable: getTestCreateTableStmt10(),
 					},
+					"exist_tb_11": {
+						sizeLoad:      true,
+						isLoad:        true,
+						Size:          1,
+						OriginalTable: getTestCreateTableStmt11(),
+					},
 				},
 			},
 			"myisam_utf8_db": {
@@ -386,3 +392,23 @@ PRIMARY KEY (id) USING BTREE
 	stmt, _ := node.(*ast.CreateTableStmt)
 	return stmt
 }
+
+func getTestCreateTableStmt11() *ast.CreateTableStmt {
+	baseCreateQuery := `
+CREATE TABLE exist_db.exist_tb_11 (
+id bigint(10) unsigned NOT NULL AUTO_INCREMENT COMMENT "unit test",
+create_time datetime(6) NOT NULL DEFAULT CURRENT_TIMESTAMP,
+upgrade_time timestamp(6) NOT NULL DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP,
+year_time year(4) NOT NULL DEFAULT '2020',
+data_time date NOT NULL DEFAULT '2020-01-01 00:00:00',
+data_time2 TIME NOT NULL DEFAULT '12:00:00', 
+PRIMARY KEY (id) USING BTREE
+)ENGINE=InnoDB AUTO_INCREMENT=3 DEFAULT CHARSET=utf8 COMMENT="unit test";
+`
+	node, err := util.ParseOneSql(baseCreateQuery)
+	if err != nil {
+		panic(err)
+	}
+	stmt, _ := node.(*ast.CreateTableStmt)
+	return stmt
+}