session: Fix txn.onStmtEnd is not called when some special error occurs in ExecutePreparedStmt

[MyonKeminta]

What problem does this PR solve?

Problem Summary:

In this part of code, previously it calls onStmtStart, calculates the result, calls onStmtEnd, and return the result. However later some modification to this code adds some more return statements between the onStmtStart and onStmtEnd calls, which makes the onStmtEnd not called in some rare cases. This PR fixes it by calling onStmtEnd in defer statement.

What is changed and how it works?

What's Changed: Call the onStmtEnd in defer stmt.

Related changes

• Need to cherry-pick to the release branch
  • release-5.1

Check List

Tests

Side effects

• Performance regression
  • Consumes more CPU
  • Consumes more MEM
• Breaking backward compatibility

Release note

• No release note.

[cfzjywxk]

/lgtm

[cfzjywxk]

/merge

[ti-chi-bot]

@cfzjywxk: /merge in this pull request requires 2 approval(s).

In response to this:

/merge

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[cfzjywxk]

/lgtm

[ti-chi-bot]

[REVIEW NOTIFICATION]

This pull request has been approved by:

• cfzjywxk
• longfangsong

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[cfzjywxk]

/merge

[ti-chi-bot]

This pull request has been accepted and is ready to merge.

Commit hash: 8159237

[ti-srebot]

cherry pick to release-5.1 in PR #26080