The issue discussion between dml and ddl deployment

1. DML and DDL 在部屬時遇到
的問題探討
Len Chang 2019-11-16

2. Description
● DDL(Data Definition Language)
○ CREATE / ALTER / UPDATE schema
● DML(Data Manipulation Language)
○ INSERT / UPDATE / DELETE data
● DQL(Data Query Language)
○ SELECT data
● DCL(Data Control Language)
○ GRANT / REVOKE
○ COMMIT / ROLLBACK

3. Description
Transaction
● 將多個資料庫操作的 SQL 指令 group 成一個執行的單元區塊（ a single
execution unit ），以特定的字串（ Begin Transaction ）來標記交易開始，一個交
易可能包括了多個資料庫操作指令來完成，交易結束時的動作有兩個，若所有的
操作全部執行成功，交易才算成功並提交變更（ Commit Transaction ），若當中
有發生錯誤失敗，則整個交易宣告失敗並回復所有變更（ Rollback Transaction
）。

4. DDL in transaction process...
It will lock all operations included...
● DML
● DQL

5. DML in transaction process...
It will lock operations included
● DML

6. DQL in transaction process...
Doesn’t lock anything

7. Case - DML and DDL in same transaction

8. Case - DML and DDL in same transaction (fix)

9. Case - DML and DDL in same transaction (fix_2)
● package.json
● pipeline script