Why I'm doing:

It is a bug.
If we create table which is partitioned by date_trunc with property partition_live_number, then DynamicPartitionScheduler will drop partitions periodly,
at same time, we query some data from the table. then error happen:

java.util.ConcurrentModificationException: null
at java.util.LinkedHashMap$LinkedHashIterator.nextNode(LinkedHashMap.java:719) ~[?:?]
at java.util.LinkedHashMap$LinkedValueIterator.next(LinkedHashMap.java:746) ~[?:?]
at com.starrocks.sql.optimizer.statistics.StatisticsCalcUtils.deltaRows(StatisticsCalcUtils.java:176) ~[starrocks-fe.jar:?]

What I'm doing:

copy the Table data structure before iterator
Fixes #53312

What type of PR is this:

• BugFix
• Feature
• Enhancement
• Refactor
• UT
• Doc
• Tool

Does this PR entail a change in behavior?

• Yes, this PR will result in a change in behavior.
• No, this PR will not result in a change in behavior.

If yes, please specify the type of change:

• Interface/UI changes: syntax, type conversion, expression evaluation, display information
• Parameter changes: default values, similar parameters but with different default values
• Policy changes: use new policy to replace old one, functionality automatically enabled
• Feature removed
• Miscellaneous: upgrade & downgrade compatibility, etc.

Checklist:

• I have added test cases for my bug fix or my new feature
• This pr needs user documentation (for new or modified features or behaviors)
• I have added documentation for my new feature or new function
• This is a backport pr

Bugfix cherry-pick branch check:

• I have checked the version labels which the pr will be auto-backported to the target branch
  • 3.4
  • 3.3
  • 3.2
  • 3.1
  • 3.0