diff options
Diffstat (limited to 'sql/sql_class.h')
| -rw-r--r-- | sql/sql_class.h | 22 |
1 files changed, 17 insertions, 5 deletions
diff --git a/sql/sql_class.h b/sql/sql_class.h index 995b5ac0bde..99803802001 100644 --- a/sql/sql_class.h +++ b/sql/sql_class.h @@ -356,13 +356,25 @@ public: inline uint32 get_open_count() { return open_count; } }; - +/* + The COPY_INFO structure is used by INSERT/REPLACE code. + The schema of the row counting by the INSERT/INSERT ... ON DUPLICATE KEY + UPDATE code: + If a row is inserted then the copied variable is incremented. + If a row is updated by the INSERT ... ON DUPLICATE KEY UPDATE and the + new data differs from the old one then the copied and the updated + variables are incremented. + The touched variable is incremented if a row was touched by the update part + of the INSERT ... ON DUPLICATE KEY UPDATE no matter whether the row + was actually changed or not. +*/ typedef struct st_copy_info { - ha_rows records; - ha_rows deleted; - ha_rows updated; - ha_rows copied; + ha_rows records; /* Number of processed records */ + ha_rows deleted; /* Number of deleted records */ + ha_rows updated; /* Number of updated records */ + ha_rows copied; /* Number of copied records */ ha_rows error_count; + ha_rows touched; /* Number of touched records */ enum enum_duplicates handle_duplicates; int escape_char, last_errno; bool ignore; |