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https://dev.mysql.com/doc/internals/en/command-phase.html
In the command phase, the client sends a command packet with the sequence-id [00]: 13 00 00 00 03 53 ...
https://dev.mysql.com/doc/internals/en/comments-within-boxes.html
Please work 100% perfect when using boxes made of '#'. Bad example similar to what I found in some tests: ############################################### # # # Some text # # Some text # # # # Author : ..... # # # # Some text # # # ...
https://dev.mysql.com/doc/internals/en/complicated-test-architecture.html
If your test is very complicated, write a sufficient explanation of the test architecture. This helps avoid having someone else come along and unintentially change the test in ways that: Shift the goal of the check Destroy your test architecture ...
https://dev.mysql.com/doc/internals/en/debug-sync-implementation.html
Pseudo code for a synchronization point: #define DEBUG_SYNC(thd, sync_point_name) if (unlikely(opt_debug_sync_timeout)) debug_sync(thd, STRING_WITH_LEN(sync_point_name)) The synchronization point performs a binary search in a sorted array of ...
https://dev.mysql.com/doc/internals/en/generic-response-packets.html
For most commands the client sends to the server, the server returns one of these packets in response: Section 14.1.3.1, “OK_Packet” Section 14.1.3.2, “ERR_Packet” Section 14.1.3.3, “EOF_Packet” .
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/not-so-fast-path.html
If the servers default auth method doesn't match the clients or accounts auth method a extra round is needed as usual. server uses mysql_native_password as default: 4d 00 00 00 0a 35 2e 36 2e 37 2d 6c 6f 67 00 01 M....5.6.7-log.. 00 00 00 51 5f 5a ...
https://dev.mysql.com/doc/internals/en/optimizer-folding-constants.html
A transformation takes place for this expression: WHERE column1 = 1 + 2 which becomes: WHERE column1 = 3 Before you say, “but I never would write 1 + 2 in the first place”, remember what was said earlier about constant propagation. It is quite ...
https://dev.mysql.com/doc/internals/en/out-parameter-set.html
Starting with MySQL 5.5.3, prepared statements can bind OUT parameters of stored procedures. They are returned as an extra resultset in the multi-resultset response. The client announces it can handle OUT parameters by settting the ...