TiFlash v5.1.4

Feature enhancements

• Support pushing down ADDDATE() and DATE_ADD() to TiFlash
• Support pushing down INET6_ATON and INET6_NTOA to TiFlash
• Support pushing down INET_ATON and INET_NTOA to TiFlash
• Increase the max supported depth of expression or plan tree in a DAG request from 100 to 200

Bug fixes

• Fix the issue that the str_to_date() function incorrectly handles leading zeros when parsing microseconds
• Fix the TiFlash crash problem when the memory limit is enabled
• Fix the issue that when an input time is earlier than 1970-01-01 00:00:01 UTC, the behavior of unix_timestamp is inconsistent with that of TiDB or MySQL
• Fix the potential data inconsistency caused by widening the primary key column when the primary key is handle
• Fix the overflow bug and the issue of reporting Can't compare error when comparing data in the DECIMAL data type
• Fix the unexpected error of 3rd arguments of function substringUTF8 must be constants.
• Fix the issue that TiFlash fails to start on platforms without the nsl library
• Fix the overflow bug when casting data to the DECIMAL data type
• Fix the issue that the castStringAsReal behavior is inconsistent in TiFlash and in TiDB/TiKV
• Fix the issue that TiFlash might return the EstablishMPPConnection error after it is restarted
• Fix the issue that obsolete data cannot be reclaimed after setting the number of TiFlash replicas to 0
• Fix the issue that the CastStringAsDecimal behavior is inconsistent in TiFlash and in TiDB/TiKV
• Fix the issue that queries with the where <string> clause return wrong results
• Fix the issue that TiFlash might panic when an MPP query is stopped
• Fix the unexpected error of Unexpected type of column: Nullable(Nothing)