branch-3.1: [opt](partial update) use a separate config to control the behavior of newly inserted rows in partial update (#41232)#52290
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Thank you for your contribution to Apache Doris. Please clearly describe your PR:
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…f newly inserted rows in partial update (apache#41232) Currently, Doris use strict mode to decide if newly inserted rows should be appended or report an error in partial update, which is hard to use. This PR add a new session variable and load property `partial_update_new_key_behavior` to control the behavior of newly inserted rows in partial update. `partial_update_new_key_behavior` has ~three~ two options: - `APPEND`: append the newly inserted rows - ~`IGNORE`: delete the newly inserted rows silently(will not be taken into filtered rows)~ - `ERROR`: report error if meet newly inserted rows, and the error msg will contains one row's keys which is not in table. --- The reason for not supporting `IGNORE` mode: To support `IGNORE` mode, we need to add delete sign for newly inserted rows in partial update to delete them rather than use delete bitmap mark to delete them because compaction will not use delete bitmap when reading data. Also, we need to record the rows whose delete sign is added by us in this situation for resolving conflicts in publish phase to avoid wrongly delete the rows if there are another concurrent load insert some of these rows successfully. This increases code complexity and is error-prone. Doc: apache/doris-website#2472
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pick #41232