fix: insert IN(null) instead of IN() when In([]) empty array for mysq…

…lDriver (typeorm#6237)

fix: lint warning

Co-authored-by: shitong.zheng <shitong.zheng@shopee.com>

src/find-options/FindOperator.ts

@@ -1,6 +1,7 @@
 import {FindOperatorType} from "./FindOperatorType";
 import {Connection} from "../";
 import {OracleDriver} from "../driver/oracle/OracleDriver";
+import {MysqlDriver} from "../driver/mysql/MysqlDriver";
 
 /**
  * Find Operator used in Find Conditions.
@@ -108,9 +109,9 @@ export class FindOperator<T> {
             case "between":
                 return `${aliasPath} BETWEEN ${parameters[0]} AND ${parameters[1]}`;
             case "in":
-                if (connection.driver instanceof OracleDriver && parameters.length === 0) {
+                if ((connection.driver instanceof OracleDriver || connection.driver instanceof MysqlDriver) && parameters.length === 0) {
                     return `${aliasPath} IN (null)`;
-                }                
+                }
                 return `${aliasPath} IN (${parameters.join(", ")})`;
             case "any":
                 return `${aliasPath} = ANY(${parameters[0]})`;
@@ -127,4 +128,4 @@ export class FindOperator<T> {
         return "";
     }
 
-}
+}