greenplumn cdbendpoint_private 源码
greenplumn cdbendpoint_private 代码
文件路径:/src/backend/cdb/endpoint/cdbendpoint_private.h
/*-------------------------------------------------------------------------
*
* cdbendpoint_private.h
* Internal routines for parallel retrieve cursor.
*
*
* Copyright (c) 2020-Present VMware, Inc. or its affiliates
*
* src/backend/cdb/endpoints/cdbendpoint_private.h
*
*-------------------------------------------------------------------------
*/
#include "cdb/cdbendpoint.h"
#ifndef CDBENDPOINTINTERNAL_H
#define CDBENDPOINTINTERNAL_H
#define MAX_ENDPOINT_SIZE 1024
#define ENDPOINT_TOKEN_ARR_LEN 16
#define ENDPOINT_TOKEN_STR_LEN (ENDPOINT_TOKEN_ARR_LEN<<1)
#define InvalidEndpointSessionId (-1) /* follows invalid
* gp_session_id */
#define ENDPOINT_KEY_TUPLE_DESC_LEN 1
#define ENDPOINT_KEY_TUPLE_DESC 2
#define ENDPOINT_KEY_TUPLE_QUEUE 3
#define ENDPOINT_MSG_QUEUE_MAGIC 0x1949100119980802U
/*
* Naming rules for endpoint:
* cursorname_sessionIdHex_segIndexHex
*/
/* ACK NOTICE MESSAGE FROM ENDPOINT QE/Entry DB to QD */
#define ENDPOINT_NAME_SESSIONID_LEN 8
#define ENDPOINT_NAME_COMMANDID_LEN 8
#define ENDPOINT_NAME_CURSOR_LEN (NAMEDATALEN - 1 - ENDPOINT_NAME_SESSIONID_LEN - ENDPOINT_NAME_COMMANDID_LEN)
extern void check_parallel_retrieve_cursor_errors(EState *estate);
/* Endpoint shared memory utility functions in "cdbendpoint.c" */
extern Endpoint *get_endpointdesc_by_index(int index);
extern Endpoint *find_endpoint(const char *endpointName, int sessionID);
extern void get_token_from_session_hashtable(int sessionId, Oid userID, int8 *token /* out */ );
extern int get_session_id_from_token(Oid userID, const int8 *token);
/* utility functions in "cdbendpointutilities.c" */
extern bool endpoint_token_hex_equals(const int8 *token1, const int8 *token2);
extern bool endpoint_name_equals(const char *name1, const char *name2);
extern void endpoint_token_str2arr(const char *tokenStr, int8 *token);
extern void endpoint_token_arr2str(const int8 *token, char *tokenStr);
extern char *state_enum_to_string(EndpointState state);
#endif /* CDBENDPOINTINTERNAL_H */
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