Commit fa15bc6f authored by arjen@fred.bitbike.com's avatar arjen@fred.bitbike.com
Browse files

Various clarifications and cleanups.

parent a3538124

Docs/manual.texi

+16 −11
Original line number Diff line number Diff line
@@ -546,9 +546,6 @@ of the @code{MySQL Database Software}. @xref{MySQL 4.0 In A Nutshell}. 
@item

Written in C and C++.  Tested with a broad range of different compilers.

@item

No memory leaks.  The @code{MySQL} code has been tested with Purify,

a commercial memory leakage detector.

@item

Works on many different platforms.  @xref{Which OS}.

@item

Uses GNU Automake (1.4), Autoconf (Version 2.52 or newer), and Libtool for
@@ -570,6 +567,10 @@ In-memory hash tables which are used as temporary tables. 
SQL functions are implemented through a highly optimised class library and

should be as fast as possible!  Usually there isn't any memory allocation

at all after query initialisation.

@item

The @code{MySQL} code gets tested with Purify

(a commercial memory leakage detector) as well as with Valgrind,

a GPL tool (@uref{http://developer.kde.org/~sewardj/}).

@end itemize















@item Column Types










@@ -27645,11 +27646,10 @@ flag again, the @code{SQL_MAX_JOIN_SIZE} variable will be ignored.













You can set a default value for this variable by starting @code{mysqld} with















@code{-O max_join_size=#}.



























Note that if the result of the query is in the query cache, the above













check will not be made, but MySQL will instead send the result to the













client. We regard this as a feature as in this case the query result is













already computed and it will not cause any big burden for the server to













send the result to the client.













Note that if the result of the query is already in the query cache, the













above check will not be made. Instead, MySQL will send the result to the













client. Since the query result is already computed and it will not burden













the server to send the result to the client.





























@item SQL_QUERY_CACHE_TYPE = OFF | ON | DEMAND















@item SQL_QUERY_CACHE_TYPE = 0   | 1  | 2










@@ -35315,6 +35315,9 @@ value.



























@item















@cindex default values













A @code{DEFAULT} value has to be a constant, it can not be a function or













an expression.



























If no @code{DEFAULT} value is specified for a column, MySQL















automatically assigns one.
























@@ -35805,8 +35808,10 @@ MySQL tries to convert data to the new type as well as possible.



























@item















In MySQL Version 3.22 or later, you can use @code{FIRST} or













@code{ADD ... AFTER col_name} to add a column at a specific position within













a table row. The default is to add the column last.













@code{ADD ... AFTER col_name} to add a column at a specific position













within a table row. The default is to add the column last.













From MySQL Version 4.0.1, you can also use the @code{FIRST} and













@code{AFTER} keywords in @code{CHANGE} or @code{MODIFY}.





























@findex ALTER COLUMN















@item










@@ -49780,7 +49785,7 @@ Ignore @code{DATA DIRECTORY} and @code{INDEX DIRECTORY} directives on Windows.













Added boolean full-text search code. It should be considered early alpha.















@item















Extended @code{MODIFY} and @code{CHANGE} in @code{ALTER TABLE} to accept













the @code{AFTER} keyword.













the @code{FIRST} and @code{AFTER} keywords.















@item















Indexes are now used with @code{ORDER BY} on a whole @code{InnoDB} table.















@end itemize