bugfix: fix mysql through "select last_insert_id" get auto-increment failure

[xiaochangbai]

• I have registered the PR changes.

Ⅰ. Describe what this PR did

mysql通过statementProxy.getGeneratedKeys()获取自增主键失败时进入catch逻辑中使用“SELECT LAST_INSERT_ID()”继续获取。当updateCount<=1时会在final逻辑中关闭rsFirstId，由于rsFirstId和genKeys引用的是同一个对象，所以genKeys也关闭了，此时再调用genKeys.next()就会报错：java.sql.SQLException: Operation not allowed after ResultSet closed

Ⅱ. Does this pull request fix one issue?

Ⅲ. Why don't you add test cases (unit test/integration test)?

Ⅳ. Describe how to verify it

Ⅴ. Special notes for reviews

[funky-eyes]

此时再调用genKeys.next()就会报错 指的是哪？

[xiaochangbai]

[lgtm-com]

This pull request fixes 1 alert when merging 2ec2098 into 11d3478 - view on LGTM.com

fixed alerts:

• 1 for Potential database resource leak

[lgtm-com]

This pull request fixes 1 alert when merging 2d0437c into 11d3478 - view on LGTM.com

fixed alerts:

• 1 for Potential database resource leak

[lgtm-com]

This pull request fixes 1 alert when merging 84972bc into 11d3478 - view on LGTM.com

fixed alerts:

• 1 for Potential database resource leak

[lgtm-com]

This pull request fixes 1 alert when merging 18f10ef into 11d3478 - view on LGTM.com

fixed alerts:

• 1 for Potential database resource leak

[funky-eyes]

LGTM

[jsbxyyx]

LGTM

[lgtm-com]

This pull request fixes 1 alert when merging cc89dea into 2c6e647 - view on LGTM.com

fixed alerts:

• 1 for Potential database resource leak

[funky-eyes]

改动的代码块进行code formatting

[xiaochangbai]

OK，等下下班回去改一下

[codecov-commenter]

Codecov Report

Merging #4310 (cf0a421) into develop (2c6e647) will increase coverage by 0.00%.
The diff coverage is 63.63%.

@@            Coverage Diff             @@
##             develop    #4310   +/-   ##
==========================================
  Coverage      48.52%   48.52%           
- Complexity      3798     3799    +1     
==========================================
  Files            725      725           
  Lines          24306    24310    +4     
  Branches        2984     2986    +2     
==========================================
+ Hits           11795    11797    +2     
- Misses         11261    11262    +1     
- Partials        1250     1251    +1     

Impacted Files	Coverage Δ
.../rm/datasource/exec/mysql/MySQLInsertExecutor.java	69.14% <63.63%> (-0.86%)	⬇️

[lgtm-com]

This pull request fixes 1 alert when merging cf0a421 into 2c6e647 - view on LGTM.com

fixed alerts:

• 1 for Potential database resource leak

[slievrly]

LGTM