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auto-magic replication redirection logic support in the client,

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compiles, passes test suite, does magic, has bugs, but none that I know 
at this point. Have not tested everything yet, though. Changed
a lot of code in the client, but normal stuff appears to be working.
This commit is contained in:
sasha@mysql.sashanet.com
2001-06-08 19:24:41 -06:00
parent 3aafd368a4
commit 24f89c754a
9 changed files with 435 additions and 53 deletions
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39
include/mysql.h
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@@ -154,6 +154,14 @@ enum mysql_option { MYSQL_OPT_CONNECT_TIMEOUT, MYSQL_OPT_COMPRESS,
enum mysql_status { MYSQL_STATUS_READY,MYSQL_STATUS_GET_RESULT,
MYSQL_STATUS_USE_RESULT};
/* there are three types of queries - the ones that have to go to
the master, the ones that go to a slave, and the adminstrative
type which must happen on the pivot connectioin
*/
enum mysql_rpl_type { MYSQL_RPL_MASTER, MYSQL_RPL_SLAVE,
MYSQL_RPL_ADMIN };
typedef struct st_mysql {
NET net; /* Communication parameters */
gptr connector_fd; /* ConnectorFd for SSL */
@@ -183,7 +191,15 @@ typedef struct st_mysql {
struct st_mysql* master, *next_slave;
struct st_mysql* last_used_slave; /* needed for round-robin slave pick */
my_bool is_slave; /* will be false for a lone connection */
struct st_mysql* last_used_con; /* needed for send/read/store/use
result to work
correctly with replication
*/
my_bool rpl_pivot; /* set if this is the original connection,
not a master or a slave we have added though
mysql_rpl_probe() or mysql_set_master()/
mysql_add_slave()
*/
} MYSQL;
@@ -261,9 +277,13 @@ int STDCALL mysql_real_query(MYSQL *mysql, const char *q,
/* perform query on master */
int STDCALL mysql_master_query(MYSQL *mysql, const char *q,
unsigned int length);
int STDCALL mysql_master_send_query(MYSQL *mysql, const char *q,
unsigned int length);
/* perform query on slave */
int STDCALL mysql_slave_query(MYSQL *mysql, const char *q,
unsigned int length);
int STDCALL mysql_slave_send_query(MYSQL *mysql, const char *q,
unsigned int length);
/* enable/disable parsing of all queries to decide
if they go on master or slave */
@@ -278,11 +298,22 @@ void STDCALL mysql_disable_reads_from_master(MYSQL* mysql);
/* get the value of the master read flag */
int STDCALL mysql_reads_from_master_enabled(MYSQL* mysql);
int STDCALL mysql_query_goes_to_master(const char* q, int len);
enum mysql_rpl_type STDCALL mysql_rpl_query_type(const char* q, int len);
/* discover the master and its slaves */
int STDCALL mysql_rpl_probe(MYSQL* mysql);
int STDCALL mysql_rpl_probe(MYSQL* mysql);
/* set the master, close/free the old one, if it is not a pivot */
int STDCALL mysql_set_master(MYSQL* mysql, const char* host,
unsigned int port,
const char* user,
const char* passwd);
int STDCALL mysql_add_slave(MYSQL* mysql, const char* host,
unsigned int port,
const char* user,
const char* passwd);
int STDCALL mysql_create_db(MYSQL *mysql, const char *DB);
int STDCALL mysql_drop_db(MYSQL *mysql, const char *DB);
int STDCALL mysql_shutdown(MYSQL *mysql);