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Diffstat (limited to 'sql/log_event.cc')
| -rw-r--r-- | sql/log_event.cc | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/sql/log_event.cc b/sql/log_event.cc index 33442baaf90..0dee50c8179 100644 --- a/sql/log_event.cc +++ b/sql/log_event.cc @@ -6469,6 +6469,16 @@ void Rows_log_event::print_helper(FILE *file, data) in the table map are initialized as zero (0). The array size is the same as the columns for the table on the slave. + Additionally, values saved for field metadata on the master are saved as a + string of bytes (uchar) in the binlog. A field may require 1 or more bytes + to store the information. In cases where values require multiple bytes + (e.g. values > 255), the endian-safe methods are used to properly encode + the values on the master and decode them on the slave. When the field + metadata values are captured on the slave, they are stored in an array of + type uint16. This allows the least number of casts to prevent casting bugs + when the field metadata is used in comparisons of field attributes. When + the field metadata is used for calculating addresses in pointer math, the + type used is uint32. */ /** |