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cleanup: dead code, comments, avoid current_thd

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This commit is contained in:
Sergei Golubchik
2020-03-24 22:13:49 +01:00
parent 63f922dae1
commit 27bf97aa00
3 changed files with 10 additions and 4 deletions
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6
sql/handler.h
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@ -1729,10 +1729,14 @@ handlerton *ha_default_tmp_handlerton(THD *thd);
/* can be replicated by wsrep replication provider plugin */
#define HTON_WSREP_REPLICATION (1 << 13)
/* Shared storage on slave. Ignore on slave any CREATE TABLE, DROP or updates */
/*
Set this on the *slave* that's connected to a shared with a master storage.
The slave will ignore any CREATE TABLE, DROP or updates for this engine.
*/
#define HTON_IGNORE_UPDATES (1 << 14)
/*
Set this on the *master* that's connected to a shared with a slave storage.
The table may not exists on the slave. The effects of having this flag are:
- ALTER TABLE that changes engine from this table to another engine will
be replicated as CREATE + INSERT