This CL mainly support timezone in dynamic partition:
1. use new Java Time API to replace Calendar.
2. support set time zone in dynamic partition parameters.
This CL mainly changes:
1. Add a new BE config `max_pushdown_conditions_per_column` to limit the number of conditions of a single column that can be pushed down to storage engine.
2. Add 2 new session variables `max_scan_key_num` and `doris_max_scan_key_num` which can set in session level and overwrite the config value in BE.
Problem is described in ISSUE #3678
This CL mainly changed to rule of creating dynamic partition.
1. If time unit is DAY, the logic remains unchanged.
2. If time unit is WEEK, the logical changes are as follows:
1. Allow to set the start day of every week, the default is Monday. Optional Monday to Sunday
2. Assuming that the starting day is a Tuesday, the range of the partition is Tuesday of the week to Monday of the next week.
3. If time unit is MONTH, the logical changes are as follows:
1. Allow to set the start date of each month. The default is 1st, and can be selected from 1st to 28th.
2. Assuming that the starting date is the 2nd, the range of the partition is from the 2nd of this month to the 1st of the next month.
4. The `SHOW DYNAMIC PARTITION TABLES` statement adds a `StartOf` column to show the start day of week or month.
It is recommended to refer to the example in `dynamic-partition.md` to understand.
TODO:
Better to support HOUR and YEAR time unit. Maybe in next PR.
FIX: #3678
This CL mainly changes:
1. Support `SELECT INTO OUTFILE` command.
2. Support export query result to a file via Broker.
3. Support CSV export format with specified column separator and line delimiter.
Add a new config `drop_backend_after_decommission` in FE. if this config
is false, the BE will not be dropped after finishing decommission operation.
This new config is try to solve the problem described in ISSUE: #3460 .
TODO:
This method will generate a lot of data migration, so it is only a temporary solution.
After that, we should try to solve the problem of data balancing within the BE.
This CL also add the documents of FE and BE configuration.
These documents are incomplete and can be added later.
