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MDEV-8931: (server part of) session state tracking

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initial commit to test
This commit is contained in:
Oleksandr Byelkin
2016-04-15 20:40:25 +02:00
parent 468a6ad722
commit e7608a78ef
28 changed files with 928 additions and 46 deletions
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53
include/mysql_com.h
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@@ -72,6 +72,14 @@
#define INDEX_COMMENT_MAXLEN 1024
#define TABLE_PARTITION_COMMENT_MAXLEN 1024
/*
Maximum length of protocol packet.
OK packet length limit also restricted to this value as any length greater
than this value will have first byte of OK packet to be 254 thus does not
provide a means to identify if this is OK or EOF packet.
*/
#define MAX_PACKET_LENGTH (256L*256L*256L-1)
/*
USER_HOST_BUFF_SIZE -- length of string buffer, that is enough to contain
username and hostname parts of the user identifier with trailing zero in
@@ -221,6 +229,14 @@ enum enum_server_command
/* Don't close the connection for a connection with expired password. */
#define CLIENT_CAN_HANDLE_EXPIRED_PASSWORDS (1UL << 22)
/**
Capable of handling server state change information. Its a hint to the
server to include the state change information in Ok packet.
*/
#define CLIENT_SESSION_TRACK (1UL << 23)
/* Client no longer needs EOF packet */
#define CLIENT_DEPRECATE_EOF (1UL << 24)
#define CLIENT_PROGRESS_OBSOLETE (1UL << 29)
#define CLIENT_SSL_VERIFY_SERVER_CERT (1UL << 30)
/*
@@ -272,10 +288,12 @@ enum enum_server_command
CLIENT_MULTI_RESULTS | \
CLIENT_PS_MULTI_RESULTS | \
CLIENT_SSL_VERIFY_SERVER_CERT | \
CLIENT_REMEMBER_OPTIONS | \
CLIENT_REMEMBER_OPTIONS | \
MARIADB_CLIENT_PROGRESS | \
CLIENT_PLUGIN_AUTH | \
CLIENT_PLUGIN_AUTH_LENENC_CLIENT_DATA | \
CLIENT_SESSION_TRACK |\
CLIENT_DEPRECATE_EOF |\
CLIENT_CONNECT_ATTRS |\
MARIADB_CLIENT_COM_MULTI)
@@ -340,6 +358,11 @@ enum enum_server_command
*/
#define SERVER_STATUS_IN_TRANS_READONLY 8192
/**
This status flag, when on, implies that one of the state information has
changed on the server because of the execution of the last statement.
*/
#define SERVER_SESSION_STATE_CHANGED (1UL << 14)
/**
Server status flags that must be cleared when starting
@@ -356,7 +379,8 @@ enum enum_server_command
SERVER_QUERY_WAS_SLOW |\
SERVER_STATUS_DB_DROPPED |\
SERVER_STATUS_CURSOR_EXISTS|\
SERVER_STATUS_LAST_ROW_SENT)
SERVER_STATUS_LAST_ROW_SENT|\
SERVER_SESSION_STATE_CHANGED)
#define MYSQL_ERRMSG_SIZE 512
#define NET_READ_TIMEOUT 30 /* Timeout on read */
@@ -523,6 +547,30 @@ enum enum_mysql_set_option
MYSQL_OPTION_MULTI_STATEMENTS_OFF
};
/*
Type of state change information that the server can include in the Ok
packet.
Note : 1) session_state_type shouldn't go past 255 (i.e. 1-byte boundary).
2) Modify the definition of SESSION_TRACK_END when a new member is
added.
*/
enum enum_session_state_type
{
SESSION_TRACK_SYSTEM_VARIABLES, /* Session system variables */
SESSION_TRACK_SCHEMA, /* Current schema */
SESSION_TRACK_STATE_CHANGE, /* track session state changes */
SESSION_TRACK_GTIDS,
SESSION_TRACK_TRANSACTION_CHARACTERISTICS, /* Transaction chistics */
SESSION_TRACK_TRANSACTION_STATE /* Transaction state */
};
#define SESSION_TRACK_BEGIN SESSION_TRACK_SYSTEM_VARIABLES
#define SESSION_TRACK_END SESSION_TRACK_TRANSACTION_STATE
#define IS_SESSION_STATE_TYPE(T) \
(((int)(T) >= SESSION_TRACK_BEGIN) && ((T) <= SESSION_TRACK_END))
#define net_new_transaction(net) ((net)->pkt_nr=0)
#ifdef __cplusplus
@@ -641,6 +689,7 @@ my_ulonglong net_field_length_ll(uchar **packet);
my_ulonglong safe_net_field_length_ll(uchar **packet, size_t packet_len);
uchar *net_store_length(uchar *pkg, ulonglong length);
uchar *safe_net_store_length(uchar *pkg, size_t pkg_len, ulonglong length);
unsigned int net_length_size(ulonglong num);
#endif
#ifdef __cplusplus