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Expose PQbackendPID() through walreceiver API

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This will be used by a subsequent patch.

Reviewed-by: Masahiko Sawada <masahiko.sawada@2ndquadrant.com>
Discussion: https://www.postgresql.org/message-id/CA%2Bfd4k4dM0iEPLxyVyme2RAFsn8SUgrNtBJOu81YqTY4V%2BnqZA%40mail.gmail.com
This commit is contained in:
Peter Eisentraut 2020-01-14 14:05:25 +01:00
parent f595117e24
commit ee4ac46c8e
2 changed files with 15 additions and 0 deletions
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11
src/backend/replication/libpqwalreceiver/libpqwalreceiver.c
View File

@ -74,6 +74,7 @@ static char *libpqrcv_create_slot(WalReceiverConn *conn,
bool temporary,
CRSSnapshotAction snapshot_action,
XLogRecPtr *lsn);
static pid_t libpqrcv_get_backend_pid(WalReceiverConn *conn);
static WalRcvExecResult *libpqrcv_exec(WalReceiverConn *conn,
const char *query,
const int nRetTypes,
@ -93,6 +94,7 @@ static WalReceiverFunctionsType PQWalReceiverFunctions = {
libpqrcv_receive,
libpqrcv_send,
libpqrcv_create_slot,
libpqrcv_get_backend_pid,
libpqrcv_exec,
libpqrcv_disconnect
};
@ -858,6 +860,15 @@ libpqrcv_create_slot(WalReceiverConn *conn, const char *slotname,
return snapshot;
}
/*
* Return PID of remote backend process.
*/
static pid_t
libpqrcv_get_backend_pid(WalReceiverConn *conn)
{
return PQbackendPID(conn->streamConn);
}
/*
* Convert tuple query result to tuplestore.
*/

4
src/include/replication/walreceiver.h
View File

@ -226,6 +226,7 @@ typedef char *(*walrcv_create_slot_fn) (WalReceiverConn *conn,
const char *slotname, bool temporary,
CRSSnapshotAction snapshot_action,
XLogRecPtr *lsn);
typedef pid_t (*walrcv_get_backend_pid_fn) (WalReceiverConn *conn);
typedef WalRcvExecResult *(*walrcv_exec_fn) (WalReceiverConn *conn,
const char *query,
const int nRetTypes,
@ -246,6 +247,7 @@ typedef struct WalReceiverFunctionsType
walrcv_receive_fn walrcv_receive;
walrcv_send_fn walrcv_send;
walrcv_create_slot_fn walrcv_create_slot;
walrcv_get_backend_pid_fn walrcv_get_backend_pid;
walrcv_exec_fn walrcv_exec;
walrcv_disconnect_fn walrcv_disconnect;
} WalReceiverFunctionsType;
@ -276,6 +278,8 @@ extern PGDLLIMPORT WalReceiverFunctionsType *WalReceiverFunctions;
WalReceiverFunctions->walrcv_send(conn, buffer, nbytes)
#define walrcv_create_slot(conn, slotname, temporary, snapshot_action, lsn) \
WalReceiverFunctions->walrcv_create_slot(conn, slotname, temporary, snapshot_action, lsn)
#define walrcv_get_backend_pid(conn) \
WalReceiverFunctions->walrcv_get_backend_pid(conn)
#define walrcv_exec(conn, exec, nRetTypes, retTypes) \
WalReceiverFunctions->walrcv_exec(conn, exec, nRetTypes, retTypes)
#define walrcv_disconnect(conn) \