expression: avoid Order By constant expression er... (#16261)

[sre-bot]

cherry-pick #16261 to release-3.0

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What problem does this PR solve?

Issue Number: close #16203

Problem Summary:

Error is reported for order by rand() when plan cache is enabled.

What is changed and how it works?

What's Changed:

• remove Rand / Sysdate / UUID from DeferredFunctions, because they should not be folded into constant according to unFoldableFunctions, otherwise, they would be converted to a Constant with DeferredExpr in funcCallToExpression. This change makes the behavior regarding these functions consistent when plan cache is enabled / disabled.

• check if the order by items can be treated as constants during execution using a new function, instead of IsMutableEffectsExpr, which is specifically designed for de-duplicating expressions.

How it Works:

Related previous PRs for this change:

• expression,planner: support non-deterministic functions (e.g., now) in the prepared plan cache #8105: enables plan cache for functions like now();
• planner: keep unfoldable exprs when pruning columns for ORDER BY items #10064: first fix for order by rand() when plan cache is disabled by using ConstItem();
• expression: fix constItem() and column-pruning in order by clause #11839: second fix for order by rand() when plan cache is disabled by using IsMutableEffectsExpr();

Related changes

• Need to cherry-pick to the release branch

Check List

Tests

• Unit test

Side effects

N/A

Release note

[sre-bot]

/run-all-tests

[zz-jason]

LGTM

[lzmhhh123]

LGTM

[sre-bot]

/run-all-tests

[sre-bot]

/run-all-tests

[sre-bot]

@sre-bot merge failed.