session: do not allow historical read in local temporary tables

[sylzd]

What problem does this PR solve?

Issue Number: close #25938

Problem Summary:

What is changed and how it works?

Proposal: xxx

What's Changed:

How it Works:

Check List

Tests

• Unit test
• Integration test
• Manual test (add detailed scripts or steps below)
• No code

Side effects

• Performance regression: Consumes more CPU
• Performance regression: Consumes more Memory
• Breaking backward compatibility

Documentation

• Affects user behaviors
• Contains syntax changes
• Contains variable changes
• Contains experimental features
• Changes MySQL compatibility

Release note

None

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This pull request has been approved by:

• djshow832
• lcwangchao

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[sylzd]

@lcwangchao @tiancaiamao It seems conflicts with TestCreateTemporaryTable, should we modify it?

	// Considering snapshot, local temporary table is always visible.
	tk.MustExec("set @@tidb_snapshot = '2016-01-01 15:04:05.999999'")
	tk.MustExec("select * from overlap")

[lcwangchao]

@lcwangchao @tiancaiamao It seems conflicts with TestCreateTemporaryTable, should we modify it?

	// Considering snapshot, local temporary table is always visible.
	tk.MustExec("set @@tidb_snapshot = '2016-01-01 15:04:05.999999'")
	tk.MustExec("select * from overlap")

I think we should remove this test.

[lcwangchao]

@sylzd Please modify the release note and set the content None

[djshow832]

/merge

[ti-chi-bot]

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

Commit hash: a6b44b7

[sylzd]

/run-check_dev_2

[djshow832]

/merge

[ti-chi-bot]

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

Commit hash: d9d7050

[sylzd]

/run-check_dev_2

[sylzd]

/run-tide