diff options
Diffstat (limited to 'src/backend/utils/adt/pgstatfuncs.c')
| -rw-r--r-- | src/backend/utils/adt/pgstatfuncs.c | 103 |
1 files changed, 103 insertions, 0 deletions
diff --git a/src/backend/utils/adt/pgstatfuncs.c b/src/backend/utils/adt/pgstatfuncs.c index 1b22fcc3a1a..0c790ff3ec5 100644 --- a/src/backend/utils/adt/pgstatfuncs.c +++ b/src/backend/utils/adt/pgstatfuncs.c @@ -64,6 +64,7 @@ extern Datum pg_stat_get_backend_xact_start(PG_FUNCTION_ARGS); extern Datum pg_stat_get_backend_start(PG_FUNCTION_ARGS); extern Datum pg_stat_get_backend_client_addr(PG_FUNCTION_ARGS); extern Datum pg_stat_get_backend_client_port(PG_FUNCTION_ARGS); +extern Datum pg_stat_get_progress_info(PG_FUNCTION_ARGS); extern Datum pg_stat_get_db_numbackends(PG_FUNCTION_ARGS); extern Datum pg_stat_get_db_xact_commit(PG_FUNCTION_ARGS); @@ -525,6 +526,108 @@ pg_stat_get_backend_idset(PG_FUNCTION_ARGS) } /* + * Returns command progress information for the named command. + */ +Datum +pg_stat_get_progress_info(PG_FUNCTION_ARGS) +{ +#define PG_STAT_GET_PROGRESS_COLS PGSTAT_NUM_PROGRESS_PARAM + 3 + int num_backends = pgstat_fetch_stat_numbackends(); + int curr_backend; + char *cmd = text_to_cstring(PG_GETARG_TEXT_PP(0)); + ProgressCommandType cmdtype; + TupleDesc tupdesc; + Tuplestorestate *tupstore; + ReturnSetInfo *rsinfo = (ReturnSetInfo *) fcinfo->resultinfo; + MemoryContext per_query_ctx; + MemoryContext oldcontext; + + /* check to see if caller supports us returning a tuplestore */ + if (rsinfo == NULL || !IsA(rsinfo, ReturnSetInfo)) + ereport(ERROR, + (errcode(ERRCODE_FEATURE_NOT_SUPPORTED), + errmsg("set-valued function called in context that cannot accept a set"))); + if (!(rsinfo->allowedModes & SFRM_Materialize)) + ereport(ERROR, + (errcode(ERRCODE_FEATURE_NOT_SUPPORTED), + errmsg("materialize mode required, but it is not " \ + "allowed in this context"))); + + /* Build a tuple descriptor for our result type */ + if (get_call_result_type(fcinfo, NULL, &tupdesc) != TYPEFUNC_COMPOSITE) + elog(ERROR, "return type must be a row type"); + + /* Translate command name into command type code. */ + if (pg_strcasecmp(cmd, "VACUUM") == 0) + cmdtype = PROGRESS_COMMAND_VACUUM; + else + ereport(ERROR, + (errcode(ERRCODE_INVALID_PARAMETER_VALUE), + errmsg("invalid command name: \"%s\"", cmd))); + + per_query_ctx = rsinfo->econtext->ecxt_per_query_memory; + oldcontext = MemoryContextSwitchTo(per_query_ctx); + + tupstore = tuplestore_begin_heap(true, false, work_mem); + rsinfo->returnMode = SFRM_Materialize; + rsinfo->setResult = tupstore; + rsinfo->setDesc = tupdesc; + MemoryContextSwitchTo(oldcontext); + + /* 1-based index */ + for (curr_backend = 1; curr_backend <= num_backends; curr_backend++) + { + LocalPgBackendStatus *local_beentry; + PgBackendStatus *beentry; + Datum values[PG_STAT_GET_PROGRESS_COLS]; + bool nulls[PG_STAT_GET_PROGRESS_COLS]; + int i; + + MemSet(values, 0, sizeof(values)); + MemSet(nulls, 0, sizeof(nulls)); + + local_beentry = pgstat_fetch_stat_local_beentry(curr_backend); + + if (!local_beentry) + continue; + + beentry = &local_beentry->backendStatus; + + /* + * Report values for only those backends which are running the given + * command. + */ + if (!beentry || beentry->st_progress_command != cmdtype) + continue; + + /* Value available to all callers */ + values[0] = Int32GetDatum(beentry->st_procpid); + values[1] = ObjectIdGetDatum(beentry->st_databaseid); + + /* show rest of the values including relid only to role members */ + if (has_privs_of_role(GetUserId(), beentry->st_userid)) + { + values[2] = ObjectIdGetDatum(beentry->st_progress_command_target); + for(i = 0; i < PGSTAT_NUM_PROGRESS_PARAM; i++) + values[i+3] = UInt32GetDatum(beentry->st_progress_param[i]); + } + else + { + nulls[2] = true; + for (i = 1; i < PGSTAT_NUM_PROGRESS_PARAM + 1; i++) + nulls[i+3] = true; + } + + tuplestore_putvalues(tupstore, tupdesc, values, nulls); + } + + /* clean up and return the tuplestore */ + tuplestore_donestoring(tupstore); + + return (Datum) 0; +} + +/* * Returns activity of PG backends. */ Datum |