diff options
Diffstat (limited to 'sql/rpl_parallel.h')
| -rw-r--r-- | sql/rpl_parallel.h | 24 |
1 files changed, 23 insertions, 1 deletions
diff --git a/sql/rpl_parallel.h b/sql/rpl_parallel.h index 239818855b8..2062c89e62e 100644 --- a/sql/rpl_parallel.h +++ b/sql/rpl_parallel.h @@ -49,7 +49,29 @@ struct group_commit_orderer { uint64 wait_count; group_commit_orderer *prev_gco; group_commit_orderer *next_gco; - bool installed; + /* + This flag is set when this GCO has been installed into the next_gco pointer + of the previous GCO. + */ + static const uint8 INSTALLED = 0x01; + /* + This flag is set for a GCO in which we have event groups with multiple + different commit_id values from the master. This happens when we + optimistically try to execute in parallel transactions not known to be + conflict-free. + + When this flag is set, in case of DDL we need to start a new GCO regardless + of current commit_id, as DDL is not safe to speculatively apply in parallel + with prior event groups. + */ + static const uint8 MULTI_BATCH = 0x02; + /* + This flag is set for a GCO that contains DDL. If set, it forces a switch to + a new GCO upon seeing a new commit_id, as DDL is not safe to speculatively + replicate in parallel with subsequent transactions. + */ + static const uint8 FORCE_SWITCH = 0x04; + uint8 flags; }; |