Resetting a statement will result in an error, if another (different)
statement has a pending unbuffered result set (CR_COMMANDS_OUT_OF_SYNC).
Freeing a statement result set will return an error, if the statement
has no result set or was not executed (CR_STMT_NO_RESULT).
When checking for a semi sync indication header, we need also check if
the undocumented session variable @rpl_semi_sync_slave was set.
Otherwise the timestamp of the event could contain values which match
the 2 bytes of the semi sync header.
Since the variable rpl_semi_sync_slave and it's behavior is not documented,
a new option MARIADB_RPL_SEMI_SYNC was added.
- ER() macro now checks if the error code is known, if not it will return
"Unknown or undefined error code" (instead of crashing)
- SET_CLIENT_STMT_ERROR now maps to stmt_set_error and accepts variadic
arguments
Since Connector/C is not able to retrieve
error strings for server error codes, the following
error codes were replaced:
- ER_NET_PACKET_TOO_LARFE by CR_NET_PACKET_TOO_LARGE
- ER_OUT_OF_RESOURCES by CR_OUT_OF_MEMORY
- ER_NET_WRITE_ERROR by CR_ERR_NET_WRITE (new constant)
- ER_NET_UNCOMPRESS_ERROR by CR_ERR_NET_UNCOMPRESS (new constant)
ZSTD compression is now supported for connections
to a MySQL Server 8.0.
Compression algorithms are supported via compression
plugins, which can be found in plugins/compress.
A connection string contains key/value pairs, separated by a semicolon
as used in ODBC. Supported keys are all configuration options which can
be used in MariaDB configuration files. For a complete list check
https://github.com/mariadb-corporation/mariadb-connector-c/wiki/config_files#configuration-options.
The connection string must contain at least one semicolon, otherwise
it wil be interpreted as hostname. Unknown or invalid keys will be ignored.
To connect via connection string, the following methods might be used:
- by specifing connection option in configuration file:
connection=host=localhost;ssl_enforce=1;
- by using mariadb_connect() macro
mariadb_connect(mysql, "host=localhost;ssl_enforce=1")
- by passing connection string in host parameter to mysql_real_connect
mysql_real_connect(mysql, "host=localhost;ssl_enforce=1", NULL, NULL, NULL, 0, NULL, 0)
Added new option MARIADB_OPT_RESTRICTED_AUTH (and corresponding
"restricted-auth" option for configuration files) which specifies
on or more comma spearated authentication plugins which are allowed
for authenication.
If the server asks for an authentication plugin not listed in this
option the connect attempt will fail with error CR_PLUGIN_NOT_ALLOWED.
Various coverity scan fixes, including CONC-452 and CONC-453.
Special thanks to Lukas Javorsky for fixing numerous covscan
issues (This patch includes part of his pull request #126).
Coverity scan build was using the following cmake parameters:
-WITH_EXTERNAL_ZLIB=ON -DWITH_UNIT_TESTS=OFF.
CWE-416 (use after free) in dtoa.c (from netlib) is still open.
