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https://dev.mysql.com/doc/internals/en/full-text-search.html
MySQL uses Ranking with Vector Spaces for ordinary full-text queries. Rank, also known as relevance rank, also known as relevance measure, is a number that tells us how good a match is. Vector Space, which MySQL sometimes calls "natural language", ...
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/multi-resultset.html
01 31 00 0c 3f 00 01 00 00 00 08 81 00 00 00 00 .1..?........... 05 00 00 03 fe 00 00 0a 00 02 00 00 04 01 31 05 ..............1. see the EOF_Packet: 05 00 00 03 fe 00 00 0a 00 with its status-flag being 0a the 2nd resultset: 01 00 00 06 01 17 00 00 ...
https://dev.mysql.com/doc/internals/en/multi-statement.html
A multi-statement is permitting COM_QUERY to send more than one query to the server, separated by ';' characters. The client must announce that it wants multi-statements by either setting the CLIENT_MULTI_STATEMENTS capability or by using ...
https://dev.mysql.com/doc/internals/en/optimizer-trace-implementation.html
A trace is started by creating an instance of Opt_trace_start; information is added to this trace by creating instances of Opt_trace_object and Opt_trace_array, and by using the add() functions of those classes...
https://dev.mysql.com/doc/internals/en/parsing-key-information.html
Many of the index methods pass a byte array named *key that identifies the index entry to be read in a standard format. Your storage engine will need to extract the information stored in the key and translate it into its internal index format to ...
https://dev.mysql.com/doc/internals/en/prepared-stored-statement-execution.html
In order to call mysql_execute_command (the function that executes a statement) for a prepared statement and not damage its parse tree, we backup and restore the active Query_arena of THD. We don't want the garbage created during execution to be ...
https://dev.mysql.com/doc/internals/en/transactions-current-situation.html
Nowadays a statement transaction is started for each statement that accesses transactional tables or uses the binary log. Commits of statement transactions are not durable -- each statement transaction is nested in the normal transaction, and if ...
https://dev.mysql.com/doc/internals/en/x-protocol-lifecycle-lifecycle.html
Topics in this section: Connection Session Stages of Session Setup Authentication Pipelining Max Message Length Extensions The following list describes some of the terms introduced in this section: Transport Transport layer that exchanges data: TCP ...
https://dev.mysql.com/doc/internals/en/zlib-directory.html
zlib is a data compression library used to support the compressed protocol and the COMPRESS/UNCOMPRESS functions under Windows. On Unix, MySQL uses the system libgz.a library for this purpose. Zlib --- which presumably stands for "Zip Library" --- ...