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https://dev.mysql.com/doc/internals/en/implementing-index-first-method.html
The [custom-engine.html#custom-engine-api-reference-index_first index_first()] method is used for index scanning: int ha_foo::index_first(byte * buf) The *buf parameter is populated with the row that corresponds to the first key value in the index.
https://dev.mysql.com/doc/internals/en/implementing-index-last-method.html
The [custom-engine.html#custom-engine-api-reference-index_last index_last()] method is used for reverse index scanning: int ha_foo::index_last(byte * buf) The *buf parameter is populated with the row that corresponds to the last key value in the ...
https://dev.mysql.com/doc/internals/en/implementing-index-next-method.html
The [custom-engine.html#custom-engine-api-reference-index_next index_next()] method is used for index scanning: int ha_foo::index_next(byte * buf) The *buf parameter is populated with the row that corresponds to the next matching key value ...
https://dev.mysql.com/doc/internals/en/implementing-index-prev-method.html
The [custom-engine.html#custom-engine-api-reference-index_prev index_prev()] method is used for reverse index scanning: int ha_foo::index_prev(byte * buf) The *buf parameter is populated with the row that corresponds to the previous matching key ...
https://dev.mysql.com/doc/internals/en/implementing-info-method.html
Prior to commencing a table scan, the [custom-engine.html#custom-engine-api-reference-info info()] method is called to provide extra table information to the optimizer. The information required by the optimizer is not given through return values ...
https://dev.mysql.com/doc/internals/en/implementing-rnd-init-method.html
The method called before any table scan is the [custom-engine.html#custom-engine-api-reference-rnd_init rnd_init()] method. The rnd_init() method is used to prepare for a table scan, resetting counters and pointers to the start of the table. The ...
https://dev.mysql.com/doc/internals/en/implementing-rnd-pos-method.html
The [custom-engine.html#custom-engine-api-reference-rnd_pos rnd_pos()] method behaves in a similar fashion to the rnd_next() method but takes an additional parameter: int ha_foo::rnd_pos(byte * buf, byte *pos) The *pos parameter contains ...
https://dev.mysql.com/doc/internals/en/implementing-rollback.html
Of the two major transactional operations, ROLLBACK is the more complicated to implement. All operations that occurred during the transaction must be reversed so that all rows are unchanged from before the transaction began. To support ROLLBACK, ...
https://dev.mysql.com/doc/internals/en/write-row.html
Synopsis virtual int write_row ( buf); byte * buf ; Description This is the write_row method. No [custom-engine.html#custom-engine-api-reference-extra extra()] hint is given currently if a bulk load is happening. buf is a byte array of data with a ...
https://dev.mysql.com/doc/refman/8.4/en/time-zone-support.html
This section describes the time zone settings maintained by MySQL, how to load the system tables required for named time support, how to stay current with time zone changes, and how to enable leap-second support. Time zone offsets are also ...