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MDEV-20844 RBR from binary(16) to inet6 fails with error 171: The event was corrupt, leading to illegal data being read

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This patch changes the way how INET6 is packed to the RBR binary log:
- from fixed length 16 bytes
- to BINARY(16) compatible variable length style
  with trailing 0x00 byte compression.

This is to make INET6 fully compatible with BINARY(16) in RBR binary logs,
so RBR replication works in this scenarios:

- Old master BINARY(16) -> New slave INET6
- New master INET6      -> Old slave BINARY(16)

A new class StringPack was added to share the code between
Field_string and Field_inet6.
This commit is contained in:
Alexander Barkov
2019-10-18 13:09:37 +04:00
parent 9a833dc688
commit ec171a94a3
11 changed files with 322 additions and 78 deletions
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sql/sql_type.h
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@@ -25,6 +25,7 @@
#include "sql_array.h"
#include "sql_const.h"
#include "sql_time.h"
#include "sql_type_string.h"
#include "sql_type_real.h"
#include "compat56.h"
C_MODE_START