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Added Innobase to source distribution
Docs/manual.texi: Added Innobase documentation configure.in: Incremented version include/my_base.h: Added option for Innobase myisam/mi_check.c: cleanup mysql-test/t/bdb.test: cleanup mysql-test/t/innobase.test: Extended with new tests from bdb.test mysql-test/t/merge.test: Added test of SHOW create mysys/my_init.c: Fix for UNIXWARE 7 scripts/mysql_install_db.sh: Always write how to start mysqld scripts/safe_mysqld.sh: Fixed type sql/ha_innobase.cc: Update to new version sql/ha_innobase.h: Update to new version sql/handler.h: Added 'update_table_comment()' and 'append_create_info()' sql/sql_delete.cc: Fixes for Innobase sql/sql_select.cc: Fixes for Innobase sql/sql_show.cc: Append create information (for MERGE tables) sql/sql_update.cc: Fixes for Innobase
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318
innobase/include/usr0sess.h
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318
innobase/include/usr0sess.h
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/******************************************************
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Sessions
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(c) 1996 Innobase Oy
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Created 6/25/1996 Heikki Tuuri
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*******************************************************/
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#ifndef usr0sess_h
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#define usr0sess_h
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#include "univ.i"
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#include "ut0byte.h"
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#include "hash0hash.h"
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#include "trx0types.h"
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#include "srv0srv.h"
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#include "trx0types.h"
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#include "usr0types.h"
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#include "que0types.h"
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#include "data0data.h"
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#include "rem0rec.h"
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#include "com0com.h"
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/* The session system global data structure */
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extern sess_sys_t* sess_sys;
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/*************************************************************************
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Sets the session id in a client message. */
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void
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sess_cli_msg_set_sess(
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/*==================*/
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byte* str, /* in/out: message string */
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dulint sess_id);/* in: session id */
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/***************************************************************************
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Sets the message type of a message from the client. */
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UNIV_INLINE
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void
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sess_cli_msg_set_type(
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/*==================*/
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byte* str, /* in: message string */
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ulint type); /* in: message type */
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/***************************************************************************
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Gets the message type of a message from the server. */
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UNIV_INLINE
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ulint
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sess_srv_msg_get_type(
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/*==================*/
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/* out: message type */
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byte* str); /* in: message string */
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/***************************************************************************
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Creates a session sytem at database start. */
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void
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sess_sys_init_at_db_start(void);
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/*===========================*/
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/*************************************************************************
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Opens a session. */
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sess_t*
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sess_open(
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/*======*/
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/* out, own: session object */
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com_endpoint_t* endpoint, /* in: communication endpoint used
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for communicating with the client */
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byte* addr_buf, /* in: client address */
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ulint addr_len); /* in: client address length */
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/*************************************************************************
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Closes a session, freeing the memory occupied by it. */
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void
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sess_close(
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/*=======*/
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sess_t* sess); /* in, own: session object */
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/*************************************************************************
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Raises an SQL error. */
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void
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sess_raise_error_low(
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/*=================*/
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trx_t* trx, /* in: transaction */
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ulint err_no, /* in: error number */
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ulint type, /* in: more info of the error, or 0 */
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dict_table_t* table, /* in: dictionary table or NULL */
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dict_index_t* index, /* in: table index or NULL */
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dtuple_t* tuple, /* in: tuple to insert or NULL */
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rec_t* rec, /* in: record or NULL */
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char* err_str);/* in: arbitrary null-terminated error string,
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or NULL */
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/*************************************************************************
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Closes a session, freeing the memory occupied by it, if it is in a state
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where it should be closed. */
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ibool
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sess_try_close(
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/*===========*/
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/* out: TRUE if closed */
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sess_t* sess); /* in, own: session object */
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/*************************************************************************
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Initializes the first fields of a message to client. */
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void
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sess_srv_msg_init(
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/*==============*/
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sess_t* sess, /* in: session object */
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byte* buf, /* in: message buffer, must be at least of size
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SESS_SRV_MSG_DATA */
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ulint type); /* in: message type */
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/*************************************************************************
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Sends a simple message to client. */
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void
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sess_srv_msg_send_simple(
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/*=====================*/
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sess_t* sess, /* in: session object */
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ulint type, /* in: message type */
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ulint rel_kernel); /* in: SESS_RELEASE_KERNEL or
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SESS_NOT_RELEASE_KERNEL */
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/***************************************************************************
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Processes a message from a client. NOTE: May release the kernel mutex
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temporarily. */
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void
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sess_receive_msg_rel_kernel(
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/*========================*/
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sess_t* sess, /* in: session */
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byte* str, /* in: message string */
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ulint len); /* in: message length */
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/***************************************************************************
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When a command has been completed, this function sends the message about it
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to the client. */
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void
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sess_command_completed_message(
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/*===========================*/
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sess_t* sess, /* in: session */
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byte* msg, /* in: message buffer */
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ulint len); /* in: message data length */
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/***********************************************************************
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Starts a new connection and a session, or starts a query based on a client
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message. This is called by a SRV_COM thread. */
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void
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sess_process_cli_msg(
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/*=================*/
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byte* str, /* in: message string */
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ulint len, /* in: string length */
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byte* addr, /* in: address string */
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ulint alen); /* in: address length */
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/* The session handle. All fields are protected by the kernel mutex */
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struct sess_struct{
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dulint id; /* session id */
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dulint usr_id; /* user id */
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hash_node_t hash; /* hash chain node */
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ulint refer_count; /* reference count to the session
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object: when this drops to zero
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and the session has no query graphs
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left, discarding the session object
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is allowed */
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dulint error_count; /* if this counter has increased while
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a thread is parsing an SQL command,
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its graph should be discarded */
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ibool disconnecting; /* TRUE if the session is to be
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disconnected when its reference
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count drops to 0 */
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ulint state; /* state of the session */
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dulint msgs_sent; /* count of messages sent to the
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client */
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dulint msgs_recv; /* count of messages received from the
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client */
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ibool client_waits; /* when the session receives a message
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from the client, this set to TRUE, and
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when the session sends a message to
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the client this is set to FALSE */
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trx_t* trx; /* transaction object permanently
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assigned for the session: the
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transaction instance designated by the
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trx id changes, but the memory
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structure is preserved */
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ulint next_graph_id; /* next query graph id to assign */
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UT_LIST_BASE_NODE_T(que_t)
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graphs; /* query graphs belonging to this
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session */
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/*------------------------------*/
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ulint err_no; /* latest error number, 0 if none */
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char* err_str; /* latest error string */
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ulint err_len; /* error string length */
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/*------------------------------*/
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com_endpoint_t* endpoint; /* server communications endpoint used
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to communicate with the client */
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char* addr_buf; /* client address string */
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ulint addr_len; /* client address string length */
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/*------------------------------*/
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byte* big_msg; /* if the client sends a message which
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does not fit in a single packet,
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it is assembled in this buffer; if
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this field is not NULL, it is assumed
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that the message should be catenated
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here */
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ulint big_msg_size; /* size of the big message buffer */
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ulint big_msg_len; /* length of data in the big message
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buffer */
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};
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/* The session system; this is protected by the kernel mutex */
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struct sess_sys_struct{
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ulint state; /* state of the system:
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SESS_SYS_RUNNING or
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SESS_SYS_SHUTTING_DOWN */
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sess_t* shutdown_req; /* if shutdown was requested by some
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session, confirmation of shutdown
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completion should be sent to this
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session */
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dulint free_sess_id; /* first unused session id */
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hash_table_t* hash; /* hash table of the sessions */
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};
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/*---------------------------------------------------*/
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/* The format of an incoming message from a client */
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#define SESS_CLI_MSG_CHECKSUM 0 /* the checksum should be the first
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field in the message */
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#define SESS_CLI_MSG_SESS_ID 4 /* this is set to 0 if the client
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wants to connect and establish
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a new session */
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#define SESS_CLI_MSG_SESS_ID_CHECK 12 /* checksum of the sess id field */
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#define SESS_CLI_MSG_TYPE 16
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#define SESS_CLI_MSG_NO 20
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#define SESS_CLI_MSG_CONTINUE 28 /* 0, or SESS_MSG_FIRST_PART
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SESS_MSG_MIDDLE_PART, or
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SESS_MSG_LAST_PART */
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#define SESS_CLI_MSG_CONT_SIZE 32 /* size of a multipart message in
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kilobytes (rounded upwards) */
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#define SESS_CLI_MSG_DATA 36
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/*---------------------------------------------------*/
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/* Client-to-session message types */
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#define SESS_CLI_CONNECT 1
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#define SESS_CLI_PREPARE 2
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#define SESS_CLI_EXECUTE 3
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#define SESS_CLI_BREAK_EXECUTION 4
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/* Client-to-session statement command types */
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#define SESS_COMM_FETCH_NEXT 1
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#define SESS_COMM_FETCH_PREV 2
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#define SESS_COMM_FETCH_FIRST 3
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#define SESS_COMM_FETCH_LAST 4
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#define SESS_COMM_FETCH_NTH 5
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#define SESS_COMM_FETCH_NTH_LAST 6
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#define SESS_COMM_EXECUTE 7
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#define SESS_COMM_NO_COMMAND 8
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/*---------------------------------------------------*/
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/* The format of an outgoing message from a session to the client */
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#define SESS_SRV_MSG_CHECKSUM 0 /* the checksum should be the first
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field in the message */
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#define SESS_SRV_MSG_SESS_ID 4
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#define SESS_SRV_MSG_TYPE 12
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#define SESS_SRV_MSG_NO 16
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#define SESS_SRV_MSG_CONTINUE 24 /* 0, or SESS_MSG_FIRST_PART
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SESS_MSG_MIDDLE_PART, or
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SESS_MSG_LAST_PART */
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#define SESS_SRV_MSG_CONT_SIZE 28 /* size of a multipart message
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in kilobytes (rounded upward) */
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#define SESS_SRV_MSG_DATA 32
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/*---------------------------------------------------*/
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/* Session-to-client message types */
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#define SESS_SRV_ACCEPT_CONNECT 1
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#define SESS_SRV_SUCCESS 2
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#define SESS_SRV_ERROR 3
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/* Multipart messages */
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#define SESS_MSG_SINGLE_PART 0
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#define SESS_MSG_FIRST_PART 1
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#define SESS_MSG_MIDDLE_PART 2
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#define SESS_MSG_LAST_PART 3
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/* Error numbers */
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#define SESS_ERR_NONE 0
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#define SESS_ERR_TRX_COMMITTED 1
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#define SESS_ERR_TRX_ROLLED_BACK 2
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#define SESS_ERR_SESSION_DISCONNECTED 3
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#define SESS_ERR_REPLY_FAILED 4
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#define SESS_ERR_CANNOT_BREAK_OP 5
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#define SESS_ERR_MSG_LOST 6
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#define SESS_ERR_MSG_CORRUPTED 7
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#define SESS_ERR_EXTRANEOUS_MSG 8
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#define SESS_ERR_OUT_OF_MEMORY 9
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#define SESS_ERR_SQL_ERROR 10
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#define SESS_ERR_STMT_NOT_FOUND 11
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#define SESS_ERR_STMT_NOT_READY 12
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#define SESS_ERR_EXTRANEOUS_SRV_MSG 13
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#define SESS_ERR_BREAK_BY_CLIENT 14
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/* Session states */
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#define SESS_ACTIVE 1
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#define SESS_ERROR 2 /* session contains an error message
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which has not yet been communicated
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to the client */
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/* Session system states */
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#define SESS_SYS_RUNNING 1
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#define SESS_SYS_SHUTTING_DOWN 2
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/* Session hash table size */
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#define SESS_HASH_SIZE 1024
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/* Flags used in sess_srv_msg_send */
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#define SESS_RELEASE_KERNEL 1
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#define SESS_NOT_RELEASE_KERNEL 2
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#ifndef UNIV_NONINL
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#include "usr0sess.ic"
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#endif
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#endif
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