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postgresql/src/backend/utils/adt/pgstatfuncs.c

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/*-------------------------------------------------------------------------
*
* pgstatfuncs.c
* Functions for accessing the statistics collector data
*
* Portions Copyright (c) 1996-2020, PostgreSQL Global Development Group
* Portions Copyright (c) 1994, Regents of the University of California
*
*
* IDENTIFICATION
* src/backend/utils/adt/pgstatfuncs.c
*
*-------------------------------------------------------------------------
*/
#include "postgres.h"
#include "access/htup_details.h"
#include "access/xlog.h"
#include "catalog/pg_authid.h"
#include "catalog/pg_type.h"
#include "common/ip.h"
#include "funcapi.h"
#include "miscadmin.h"
#include "pgstat.h"
#include "postmaster/bgworker_internals.h"
#include "postmaster/postmaster.h"
#include "storage/proc.h"
#include "storage/procarray.h"
#include "utils/acl.h"
#include "utils/builtins.h"
#include "utils/inet.h"
#include "utils/timestamp.h"
#define UINT32_ACCESS_ONCE(var) ((uint32)(*((volatile uint32 *)&(var))))
#define HAS_PGSTAT_PERMISSIONS(role) (is_member_of_role(GetUserId(), DEFAULT_ROLE_READ_ALL_STATS) || has_privs_of_role(GetUserId(), role))
/* Global bgwriter statistics, from bgwriter.c */
extern PgStat_MsgBgWriter bgwriterStats;
Datum
pg_stat_get_numscans(PG_FUNCTION_ARGS)
{
Oid relid = PG_GETARG_OID(0);
int64 result;
PgStat_StatTabEntry *tabentry;
if ((tabentry = pgstat_fetch_stat_tabentry(relid)) == NULL)
result = 0;
else
result = (int64) (tabentry->numscans);
PG_RETURN_INT64(result);
}
Datum
pg_stat_get_tuples_returned(PG_FUNCTION_ARGS)
{
Oid relid = PG_GETARG_OID(0);
int64 result;
PgStat_StatTabEntry *tabentry;
if ((tabentry = pgstat_fetch_stat_tabentry(relid)) == NULL)
result = 0;
else
result = (int64) (tabentry->tuples_returned);
PG_RETURN_INT64(result);
}
Datum
pg_stat_get_tuples_fetched(PG_FUNCTION_ARGS)
{
Oid relid = PG_GETARG_OID(0);
int64 result;
PgStat_StatTabEntry *tabentry;
if ((tabentry = pgstat_fetch_stat_tabentry(relid)) == NULL)
result = 0;
else
result = (int64) (tabentry->tuples_fetched);
PG_RETURN_INT64(result);
}
Datum
pg_stat_get_tuples_inserted(PG_FUNCTION_ARGS)
{
Oid relid = PG_GETARG_OID(0);
int64 result;
PgStat_StatTabEntry *tabentry;
if ((tabentry = pgstat_fetch_stat_tabentry(relid)) == NULL)
result = 0;
else
result = (int64) (tabentry->tuples_inserted);
PG_RETURN_INT64(result);
}
Datum
pg_stat_get_tuples_updated(PG_FUNCTION_ARGS)
{
Oid relid = PG_GETARG_OID(0);
int64 result;
PgStat_StatTabEntry *tabentry;
if ((tabentry = pgstat_fetch_stat_tabentry(relid)) == NULL)
result = 0;
else
result = (int64) (tabentry->tuples_updated);
PG_RETURN_INT64(result);
}
Datum
pg_stat_get_tuples_deleted(PG_FUNCTION_ARGS)
{
Oid relid = PG_GETARG_OID(0);
int64 result;
PgStat_StatTabEntry *tabentry;
if ((tabentry = pgstat_fetch_stat_tabentry(relid)) == NULL)
result = 0;
else
result = (int64) (tabentry->tuples_deleted);
PG_RETURN_INT64(result);
}
Datum
pg_stat_get_tuples_hot_updated(PG_FUNCTION_ARGS)
{
Oid relid = PG_GETARG_OID(0);
int64 result;
PgStat_StatTabEntry *tabentry;
if ((tabentry = pgstat_fetch_stat_tabentry(relid)) == NULL)
result = 0;
else
result = (int64) (tabentry->tuples_hot_updated);
PG_RETURN_INT64(result);
}
Datum
pg_stat_get_live_tuples(PG_FUNCTION_ARGS)
{
Oid relid = PG_GETARG_OID(0);
int64 result;
PgStat_StatTabEntry *tabentry;
if ((tabentry = pgstat_fetch_stat_tabentry(relid)) == NULL)
result = 0;
else
result = (int64) (tabentry->n_live_tuples);
PG_RETURN_INT64(result);
}
Datum
pg_stat_get_dead_tuples(PG_FUNCTION_ARGS)
{
Oid relid = PG_GETARG_OID(0);
int64 result;
PgStat_StatTabEntry *tabentry;
if ((tabentry = pgstat_fetch_stat_tabentry(relid)) == NULL)
result = 0;
else
result = (int64) (tabentry->n_dead_tuples);
PG_RETURN_INT64(result);
}
Datum
pg_stat_get_mod_since_analyze(PG_FUNCTION_ARGS)
{
Oid relid = PG_GETARG_OID(0);
int64 result;
PgStat_StatTabEntry *tabentry;
if ((tabentry = pgstat_fetch_stat_tabentry(relid)) == NULL)
result = 0;
else
result = (int64) (tabentry->changes_since_analyze);
PG_RETURN_INT64(result);
}
Datum
pg_stat_get_ins_since_vacuum(PG_FUNCTION_ARGS)
{
Oid relid = PG_GETARG_OID(0);
int64 result;
PgStat_StatTabEntry *tabentry;
if ((tabentry = pgstat_fetch_stat_tabentry(relid)) == NULL)
result = 0;
else
result = (int64) (tabentry->inserts_since_vacuum);
PG_RETURN_INT64(result);
}
Datum
pg_stat_get_blocks_fetched(PG_FUNCTION_ARGS)
{
Oid relid = PG_GETARG_OID(0);
int64 result;
PgStat_StatTabEntry *tabentry;
if ((tabentry = pgstat_fetch_stat_tabentry(relid)) == NULL)
result = 0;
else
result = (int64) (tabentry->blocks_fetched);
PG_RETURN_INT64(result);
}
Datum
pg_stat_get_blocks_hit(PG_FUNCTION_ARGS)
{
Oid relid = PG_GETARG_OID(0);
int64 result;
PgStat_StatTabEntry *tabentry;
if ((tabentry = pgstat_fetch_stat_tabentry(relid)) == NULL)
result = 0;
else
result = (int64) (tabentry->blocks_hit);
PG_RETURN_INT64(result);
}
Datum
pg_stat_get_last_vacuum_time(PG_FUNCTION_ARGS)
{
Oid relid = PG_GETARG_OID(0);
TimestampTz result;
PgStat_StatTabEntry *tabentry;
if ((tabentry = pgstat_fetch_stat_tabentry(relid)) == NULL)
result = 0;
else
result = tabentry->vacuum_timestamp;
if (result == 0)
PG_RETURN_NULL();
else
PG_RETURN_TIMESTAMPTZ(result);
}
Datum
pg_stat_get_last_autovacuum_time(PG_FUNCTION_ARGS)
{
Oid relid = PG_GETARG_OID(0);
TimestampTz result;
PgStat_StatTabEntry *tabentry;
if ((tabentry = pgstat_fetch_stat_tabentry(relid)) == NULL)
result = 0;
else
result = tabentry->autovac_vacuum_timestamp;
if (result == 0)
PG_RETURN_NULL();
else
PG_RETURN_TIMESTAMPTZ(result);
}
Datum
pg_stat_get_last_analyze_time(PG_FUNCTION_ARGS)
{
Oid relid = PG_GETARG_OID(0);
TimestampTz result;
PgStat_StatTabEntry *tabentry;
if ((tabentry = pgstat_fetch_stat_tabentry(relid)) == NULL)
result = 0;
else
result = tabentry->analyze_timestamp;
if (result == 0)
PG_RETURN_NULL();
else
PG_RETURN_TIMESTAMPTZ(result);
}
Datum
pg_stat_get_last_autoanalyze_time(PG_FUNCTION_ARGS)
{
Oid relid = PG_GETARG_OID(0);
TimestampTz result;
PgStat_StatTabEntry *tabentry;
if ((tabentry = pgstat_fetch_stat_tabentry(relid)) == NULL)
result = 0;
else
result = tabentry->autovac_analyze_timestamp;
if (result == 0)
PG_RETURN_NULL();
else
PG_RETURN_TIMESTAMPTZ(result);
}
Datum
pg_stat_get_vacuum_count(PG_FUNCTION_ARGS)
{
Oid relid = PG_GETARG_OID(0);
int64 result;
PgStat_StatTabEntry *tabentry;
if ((tabentry = pgstat_fetch_stat_tabentry(relid)) == NULL)
result = 0;
else
result = (int64) (tabentry->vacuum_count);
PG_RETURN_INT64(result);
}
Datum
pg_stat_get_autovacuum_count(PG_FUNCTION_ARGS)
{
Oid relid = PG_GETARG_OID(0);
int64 result;
PgStat_StatTabEntry *tabentry;
if ((tabentry = pgstat_fetch_stat_tabentry(relid)) == NULL)
result = 0;
else
result = (int64) (tabentry->autovac_vacuum_count);
PG_RETURN_INT64(result);
}
Datum
pg_stat_get_analyze_count(PG_FUNCTION_ARGS)
{
Oid relid = PG_GETARG_OID(0);
int64 result;
PgStat_StatTabEntry *tabentry;
if ((tabentry = pgstat_fetch_stat_tabentry(relid)) == NULL)
result = 0;
else
result = (int64) (tabentry->analyze_count);
PG_RETURN_INT64(result);
}
Datum
pg_stat_get_autoanalyze_count(PG_FUNCTION_ARGS)
{
Oid relid = PG_GETARG_OID(0);
int64 result;
PgStat_StatTabEntry *tabentry;
if ((tabentry = pgstat_fetch_stat_tabentry(relid)) == NULL)
result = 0;
else
result = (int64) (tabentry->autovac_analyze_count);
PG_RETURN_INT64(result);
}
Datum
pg_stat_get_function_calls(PG_FUNCTION_ARGS)
{
Oid funcid = PG_GETARG_OID(0);
PgStat_StatFuncEntry *funcentry;
if ((funcentry = pgstat_fetch_stat_funcentry(funcid)) == NULL)
PG_RETURN_NULL();
PG_RETURN_INT64(funcentry->f_numcalls);
}
Datum
pg_stat_get_function_total_time(PG_FUNCTION_ARGS)
{
Oid funcid = PG_GETARG_OID(0);
PgStat_StatFuncEntry *funcentry;
if ((funcentry = pgstat_fetch_stat_funcentry(funcid)) == NULL)
PG_RETURN_NULL();
/* convert counter from microsec to millisec for display */
PG_RETURN_FLOAT8(((double) funcentry->f_total_time) / 1000.0);
}
Datum
pg_stat_get_function_self_time(PG_FUNCTION_ARGS)
{
Oid funcid = PG_GETARG_OID(0);
PgStat_StatFuncEntry *funcentry;
if ((funcentry = pgstat_fetch_stat_funcentry(funcid)) == NULL)
PG_RETURN_NULL();
/* convert counter from microsec to millisec for display */
PG_RETURN_FLOAT8(((double) funcentry->f_self_time) / 1000.0);
}
Datum
pg_stat_get_backend_idset(PG_FUNCTION_ARGS)
{
FuncCallContext *funcctx;
int *fctx;
int32 result;
/* stuff done only on the first call of the function */
if (SRF_IS_FIRSTCALL())
{
/* create a function context for cross-call persistence */
funcctx = SRF_FIRSTCALL_INIT();
fctx = MemoryContextAlloc(funcctx->multi_call_memory_ctx,
2 * sizeof(int));
funcctx->user_fctx = fctx;
fctx[0] = 0;
fctx[1] = pgstat_fetch_stat_numbackends();
}
/* stuff done on every call of the function */
funcctx = SRF_PERCALL_SETUP();
fctx = funcctx->user_fctx;
fctx[0] += 1;
result = fctx[0];
if (result <= fctx[1])
{
/* do when there is more left to send */
SRF_RETURN_NEXT(funcctx, Int32GetDatum(result));
}
else
{
/* do when there is no more left */
SRF_RETURN_DONE(funcctx);
}
}
/*
* 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 if (pg_strcasecmp(cmd, "ANALYZE") == 0)
cmdtype = PROGRESS_COMMAND_ANALYZE;
else if (pg_strcasecmp(cmd, "CLUSTER") == 0)
cmdtype = PROGRESS_COMMAND_CLUSTER;
else if (pg_strcasecmp(cmd, "CREATE INDEX") == 0)
cmdtype = PROGRESS_COMMAND_CREATE_INDEX;
else if (pg_strcasecmp(cmd, "BASEBACKUP") == 0)
cmdtype = PROGRESS_COMMAND_BASEBACKUP;
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_PGSTAT_PERMISSIONS(beentry->st_userid))
{
values[2] = ObjectIdGetDatum(beentry->st_progress_command_target);
for (i = 0; i < PGSTAT_NUM_PROGRESS_PARAM; i++)
values[i + 3] = Int64GetDatum(beentry->st_progress_param[i]);
}
else
{
nulls[2] = true;
for (i = 0; i < PGSTAT_NUM_PROGRESS_PARAM; 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
pg_stat_get_activity(PG_FUNCTION_ARGS)
{
#define PG_STAT_GET_ACTIVITY_COLS 30
int num_backends = pgstat_fetch_stat_numbackends();
int curr_backend;
int pid = PG_ARGISNULL(0) ? -1 : PG_GETARG_INT32(0);
ReturnSetInfo *rsinfo = (ReturnSetInfo *) fcinfo->resultinfo;
TupleDesc tupdesc;
Tuplestorestate *tupstore;
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");
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++)
{
/* for each row */
Datum values[PG_STAT_GET_ACTIVITY_COLS];
bool nulls[PG_STAT_GET_ACTIVITY_COLS];
LocalPgBackendStatus *local_beentry;
PgBackendStatus *beentry;
PGPROC *proc;
const char *wait_event_type = NULL;
const char *wait_event = NULL;
MemSet(values, 0, sizeof(values));
MemSet(nulls, 0, sizeof(nulls));
/* Get the next one in the list */
local_beentry = pgstat_fetch_stat_local_beentry(curr_backend);
if (!local_beentry)
{
int i;
/* Ignore missing entries if looking for specific PID */
if (pid != -1)
continue;
for (i = 0; i < lengthof(nulls); i++)
nulls[i] = true;
nulls[5] = false;
values[5] = CStringGetTextDatum("<backend information not available>");
tuplestore_putvalues(tupstore, tupdesc, values, nulls);
continue;
}
beentry = &local_beentry->backendStatus;
/* If looking for specific PID, ignore all the others */
if (pid != -1 && beentry->st_procpid != pid)
continue;
/* Values available to all callers */
if (beentry->st_databaseid != InvalidOid)
values[0] = ObjectIdGetDatum(beentry->st_databaseid);
else
nulls[0] = true;
values[1] = Int32GetDatum(beentry->st_procpid);
if (beentry->st_userid != InvalidOid)
values[2] = ObjectIdGetDatum(beentry->st_userid);
else
nulls[2] = true;
if (beentry->st_appname)
values[3] = CStringGetTextDatum(beentry->st_appname);
else
nulls[3] = true;
if (TransactionIdIsValid(local_beentry->backend_xid))
values[15] = TransactionIdGetDatum(local_beentry->backend_xid);
else
nulls[15] = true;
if (TransactionIdIsValid(local_beentry->backend_xmin))
values[16] = TransactionIdGetDatum(local_beentry->backend_xmin);
else
nulls[16] = true;
/* Values only available to role member or pg_read_all_stats */
if (HAS_PGSTAT_PERMISSIONS(beentry->st_userid))
{
SockAddr zero_clientaddr;
char *clipped_activity;
switch (beentry->st_state)
{
case STATE_IDLE:
values[4] = CStringGetTextDatum("idle");
break;
case STATE_RUNNING:
values[4] = CStringGetTextDatum("active");
break;
case STATE_IDLEINTRANSACTION:
values[4] = CStringGetTextDatum("idle in transaction");
break;
case STATE_FASTPATH:
values[4] = CStringGetTextDatum("fastpath function call");
break;
case STATE_IDLEINTRANSACTION_ABORTED:
values[4] = CStringGetTextDatum("idle in transaction (aborted)");
break;
case STATE_DISABLED:
values[4] = CStringGetTextDatum("disabled");
break;
case STATE_UNDEFINED:
nulls[4] = true;
break;
}
clipped_activity = pgstat_clip_activity(beentry->st_activity_raw);
values[5] = CStringGetTextDatum(clipped_activity);
pfree(clipped_activity);
/* leader_pid */
nulls[29] = true;
proc = BackendPidGetProc(beentry->st_procpid);
if (proc == NULL && (beentry->st_backendType != B_BACKEND))
{
/*
* For an auxiliary process, retrieve process info from
* AuxiliaryProcs stored in shared-memory.
*/
proc = AuxiliaryPidGetProc(beentry->st_procpid);
}
/*
* If a PGPROC entry was retrieved, display wait events and lock
* group leader information if any. To avoid extra overhead, no
* extra lock is being held, so there is no guarantee of
* consistency across multiple rows.
*/
if (proc != NULL)
{
uint32 raw_wait_event;
PGPROC *leader;
raw_wait_event = UINT32_ACCESS_ONCE(proc->wait_event_info);
wait_event_type = pgstat_get_wait_event_type(raw_wait_event);
wait_event = pgstat_get_wait_event(raw_wait_event);
leader = proc->lockGroupLeader;
/*
* Show the leader only for active parallel workers. This
* leaves the field as NULL for the leader of a parallel
* group.
*/
if (leader && leader->pid != beentry->st_procpid)
{
values[29] = Int32GetDatum(leader->pid);
nulls[29] = false;
}
}
if (wait_event_type)
values[6] = CStringGetTextDatum(wait_event_type);
else
nulls[6] = true;
if (wait_event)
values[7] = CStringGetTextDatum(wait_event);
else
nulls[7] = true;
/*
* Don't expose transaction time for walsenders; it confuses
* monitoring, particularly because we don't keep the time up-to-
* date.
*/
if (beentry->st_xact_start_timestamp != 0 &&
beentry->st_backendType != B_WAL_SENDER)
values[8] = TimestampTzGetDatum(beentry->st_xact_start_timestamp);
else
nulls[8] = true;
if (beentry->st_activity_start_timestamp != 0)
values[9] = TimestampTzGetDatum(beentry->st_activity_start_timestamp);
else
nulls[9] = true;
if (beentry->st_proc_start_timestamp != 0)
values[10] = TimestampTzGetDatum(beentry->st_proc_start_timestamp);
else
nulls[10] = true;
if (beentry->st_state_start_timestamp != 0)
values[11] = TimestampTzGetDatum(beentry->st_state_start_timestamp);
else
nulls[11] = true;
/* A zeroed client addr means we don't know */
memset(&zero_clientaddr, 0, sizeof(zero_clientaddr));
if (memcmp(&(beentry->st_clientaddr), &zero_clientaddr,
sizeof(zero_clientaddr)) == 0)
{
nulls[12] = true;
nulls[13] = true;
nulls[14] = true;
}
else
{
if (beentry->st_clientaddr.addr.ss_family == AF_INET
#ifdef HAVE_IPV6
|| beentry->st_clientaddr.addr.ss_family == AF_INET6
#endif
)
{
char remote_host[NI_MAXHOST];
char remote_port[NI_MAXSERV];
int ret;
remote_host[0] = '\0';
remote_port[0] = '\0';
ret = pg_getnameinfo_all(&beentry->st_clientaddr.addr,
beentry->st_clientaddr.salen,
remote_host, sizeof(remote_host),
remote_port, sizeof(remote_port),
NI_NUMERICHOST | NI_NUMERICSERV);
if (ret == 0)
{
clean_ipv6_addr(beentry->st_clientaddr.addr.ss_family, remote_host);
values[12] = DirectFunctionCall1(inet_in,
CStringGetDatum(remote_host));
if (beentry->st_clienthostname &&
beentry->st_clienthostname[0])
values[13] = CStringGetTextDatum(beentry->st_clienthostname);
else
nulls[13] = true;
values[14] = Int32GetDatum(atoi(remote_port));
}
else
{
nulls[12] = true;
nulls[13] = true;
nulls[14] = true;
}
}
else if (beentry->st_clientaddr.addr.ss_family == AF_UNIX)
{
/*
* Unix sockets always reports NULL for host and -1 for
* port, so it's possible to tell the difference to
* connections we have no permissions to view, or with
* errors.
*/
nulls[12] = true;
nulls[13] = true;
values[14] = Int32GetDatum(-1);
}
else
{
/* Unknown address type, should never happen */
nulls[12] = true;
nulls[13] = true;
nulls[14] = true;
}
}
/* Add backend type */
if (beentry->st_backendType == B_BG_WORKER)
{
const char *bgw_type;
bgw_type = GetBackgroundWorkerTypeByPid(beentry->st_procpid);
if (bgw_type)
values[17] = CStringGetTextDatum(bgw_type);
else
nulls[17] = true;
}
else
values[17] =
CStringGetTextDatum(GetBackendTypeDesc(beentry->st_backendType));
/* SSL information */
if (beentry->st_ssl)
{
values[18] = BoolGetDatum(true); /* ssl */
values[19] = CStringGetTextDatum(beentry->st_sslstatus->ssl_version);
values[20] = CStringGetTextDatum(beentry->st_sslstatus->ssl_cipher);
values[21] = Int32GetDatum(beentry->st_sslstatus->ssl_bits);
values[22] = BoolGetDatum(beentry->st_sslstatus->ssl_compression);
if (beentry->st_sslstatus->ssl_client_dn[0])
values[23] = CStringGetTextDatum(beentry->st_sslstatus->ssl_client_dn);
else
nulls[23] = true;
if (beentry->st_sslstatus->ssl_client_serial[0])
values[24] = DirectFunctionCall3(numeric_in,
CStringGetDatum(beentry->st_sslstatus->ssl_client_serial),
ObjectIdGetDatum(InvalidOid),
Int32GetDatum(-1));
else
nulls[24] = true;
if (beentry->st_sslstatus->ssl_issuer_dn[0])
values[25] = CStringGetTextDatum(beentry->st_sslstatus->ssl_issuer_dn);
else
nulls[25] = true;
}
else
{
values[18] = BoolGetDatum(false); /* ssl */
nulls[19] = nulls[20] = nulls[21] = nulls[22] = nulls[23] = nulls[24] = nulls[25] = true;
}
/* GSSAPI information */
if (beentry->st_gss)
{
values[26] = BoolGetDatum(beentry->st_gssstatus->gss_auth); /* gss_auth */
values[27] = CStringGetTextDatum(beentry->st_gssstatus->gss_princ);
values[28] = BoolGetDatum(beentry->st_gssstatus->gss_enc); /* GSS Encryption in use */
}
else
{
values[26] = BoolGetDatum(false); /* gss_auth */
nulls[27] = true; /* No GSS principal */
values[28] = BoolGetDatum(false); /* GSS Encryption not in
* use */
}
}
else
{
/* No permissions to view data about this session */
values[5] = CStringGetTextDatum("<insufficient privilege>");
nulls[4] = true;
nulls[6] = true;
nulls[7] = true;
nulls[8] = true;
nulls[9] = true;
nulls[10] = true;
nulls[11] = true;
nulls[12] = true;
nulls[13] = true;
nulls[14] = true;
nulls[17] = true;
nulls[18] = true;
nulls[19] = true;
nulls[20] = true;
nulls[21] = true;
nulls[22] = true;
nulls[23] = true;
nulls[24] = true;
nulls[25] = true;
nulls[26] = true;
nulls[27] = true;
nulls[28] = true;
nulls[29] = true;
}
tuplestore_putvalues(tupstore, tupdesc, values, nulls);
/* If only a single backend was requested, and we found it, break. */
if (pid != -1)
break;
}
/* clean up and return the tuplestore */
tuplestore_donestoring(tupstore);
return (Datum) 0;
}
Datum
pg_backend_pid(PG_FUNCTION_ARGS)
{
PG_RETURN_INT32(MyProcPid);
}
Datum
pg_stat_get_backend_pid(PG_FUNCTION_ARGS)
{
int32 beid = PG_GETARG_INT32(0);
PgBackendStatus *beentry;
if ((beentry = pgstat_fetch_stat_beentry(beid)) == NULL)
PG_RETURN_NULL();
PG_RETURN_INT32(beentry->st_procpid);
}
Datum
pg_stat_get_backend_dbid(PG_FUNCTION_ARGS)
{
int32 beid = PG_GETARG_INT32(0);
PgBackendStatus *beentry;
if ((beentry = pgstat_fetch_stat_beentry(beid)) == NULL)
PG_RETURN_NULL();
PG_RETURN_OID(beentry->st_databaseid);
}
Datum
pg_stat_get_backend_userid(PG_FUNCTION_ARGS)
{
int32 beid = PG_GETARG_INT32(0);
PgBackendStatus *beentry;
if ((beentry = pgstat_fetch_stat_beentry(beid)) == NULL)
PG_RETURN_NULL();
PG_RETURN_OID(beentry->st_userid);
}
Datum
pg_stat_get_backend_activity(PG_FUNCTION_ARGS)
{
int32 beid = PG_GETARG_INT32(0);
PgBackendStatus *beentry;
const char *activity;
char *clipped_activity;
text *ret;
if ((beentry = pgstat_fetch_stat_beentry(beid)) == NULL)
activity = "<backend information not available>";
else if (!HAS_PGSTAT_PERMISSIONS(beentry->st_userid))
activity = "<insufficient privilege>";
else if (*(beentry->st_activity_raw) == '\0')
activity = "<command string not enabled>";
else
activity = beentry->st_activity_raw;
clipped_activity = pgstat_clip_activity(activity);
ret = cstring_to_text(activity);
pfree(clipped_activity);
PG_RETURN_TEXT_P(ret);
}
Datum
pg_stat_get_backend_wait_event_type(PG_FUNCTION_ARGS)
{
int32 beid = PG_GETARG_INT32(0);
PgBackendStatus *beentry;
PGPROC *proc;
const char *wait_event_type = NULL;
if ((beentry = pgstat_fetch_stat_beentry(beid)) == NULL)
wait_event_type = "<backend information not available>";
else if (!HAS_PGSTAT_PERMISSIONS(beentry->st_userid))
wait_event_type = "<insufficient privilege>";
else if ((proc = BackendPidGetProc(beentry->st_procpid)) != NULL)
wait_event_type = pgstat_get_wait_event_type(proc->wait_event_info);
if (!wait_event_type)
PG_RETURN_NULL();
PG_RETURN_TEXT_P(cstring_to_text(wait_event_type));
}
Datum
pg_stat_get_backend_wait_event(PG_FUNCTION_ARGS)
{
int32 beid = PG_GETARG_INT32(0);
PgBackendStatus *beentry;
PGPROC *proc;
const char *wait_event = NULL;
if ((beentry = pgstat_fetch_stat_beentry(beid)) == NULL)
wait_event = "<backend information not available>";
else if (!HAS_PGSTAT_PERMISSIONS(beentry->st_userid))
wait_event = "<insufficient privilege>";
else if ((proc = BackendPidGetProc(beentry->st_procpid)) != NULL)
wait_event = pgstat_get_wait_event(proc->wait_event_info);
if (!wait_event)
PG_RETURN_NULL();
PG_RETURN_TEXT_P(cstring_to_text(wait_event));
}
Datum
pg_stat_get_backend_activity_start(PG_FUNCTION_ARGS)
{
int32 beid = PG_GETARG_INT32(0);
TimestampTz result;
PgBackendStatus *beentry;
if ((beentry = pgstat_fetch_stat_beentry(beid)) == NULL)
PG_RETURN_NULL();
else if (!HAS_PGSTAT_PERMISSIONS(beentry->st_userid))
PG_RETURN_NULL();
result = beentry->st_activity_start_timestamp;
/*
* No time recorded for start of current query -- this is the case if the
* user hasn't enabled query-level stats collection.
*/
if (result == 0)
PG_RETURN_NULL();
PG_RETURN_TIMESTAMPTZ(result);
}
Datum
pg_stat_get_backend_xact_start(PG_FUNCTION_ARGS)
{
int32 beid = PG_GETARG_INT32(0);
TimestampTz result;
PgBackendStatus *beentry;
if ((beentry = pgstat_fetch_stat_beentry(beid)) == NULL)
PG_RETURN_NULL();
else if (!HAS_PGSTAT_PERMISSIONS(beentry->st_userid))
PG_RETURN_NULL();
result = beentry->st_xact_start_timestamp;
if (result == 0) /* not in a transaction */
PG_RETURN_NULL();
PG_RETURN_TIMESTAMPTZ(result);
}
Datum
pg_stat_get_backend_start(PG_FUNCTION_ARGS)
{
int32 beid = PG_GETARG_INT32(0);
TimestampTz result;
PgBackendStatus *beentry;
if ((beentry = pgstat_fetch_stat_beentry(beid)) == NULL)
PG_RETURN_NULL();
else if (!HAS_PGSTAT_PERMISSIONS(beentry->st_userid))
PG_RETURN_NULL();
result = beentry->st_proc_start_timestamp;
if (result == 0) /* probably can't happen? */
PG_RETURN_NULL();
PG_RETURN_TIMESTAMPTZ(result);
}
Datum
pg_stat_get_backend_client_addr(PG_FUNCTION_ARGS)
{
int32 beid = PG_GETARG_INT32(0);
PgBackendStatus *beentry;
SockAddr zero_clientaddr;
char remote_host[NI_MAXHOST];
int ret;
if ((beentry = pgstat_fetch_stat_beentry(beid)) == NULL)
PG_RETURN_NULL();
else if (!HAS_PGSTAT_PERMISSIONS(beentry->st_userid))
PG_RETURN_NULL();
/* A zeroed client addr means we don't know */
memset(&zero_clientaddr, 0, sizeof(zero_clientaddr));
if (memcmp(&(beentry->st_clientaddr), &zero_clientaddr,
sizeof(zero_clientaddr)) == 0)
PG_RETURN_NULL();
switch (beentry->st_clientaddr.addr.ss_family)
{
case AF_INET:
#ifdef HAVE_IPV6
case AF_INET6:
#endif
break;
default:
PG_RETURN_NULL();
}
remote_host[0] = '\0';
ret = pg_getnameinfo_all(&beentry->st_clientaddr.addr,
beentry->st_clientaddr.salen,
remote_host, sizeof(remote_host),
NULL, 0,
NI_NUMERICHOST | NI_NUMERICSERV);
if (ret != 0)
PG_RETURN_NULL();
clean_ipv6_addr(beentry->st_clientaddr.addr.ss_family, remote_host);
PG_RETURN_INET_P(DirectFunctionCall1(inet_in,
CStringGetDatum(remote_host)));
}
Datum
pg_stat_get_backend_client_port(PG_FUNCTION_ARGS)
{
int32 beid = PG_GETARG_INT32(0);
PgBackendStatus *beentry;
SockAddr zero_clientaddr;
char remote_port[NI_MAXSERV];
int ret;
if ((beentry = pgstat_fetch_stat_beentry(beid)) == NULL)
PG_RETURN_NULL();
else if (!HAS_PGSTAT_PERMISSIONS(beentry->st_userid))
PG_RETURN_NULL();
/* A zeroed client addr means we don't know */
memset(&zero_clientaddr, 0, sizeof(zero_clientaddr));
if (memcmp(&(beentry->st_clientaddr), &zero_clientaddr,
sizeof(zero_clientaddr)) == 0)
PG_RETURN_NULL();
switch (beentry->st_clientaddr.addr.ss_family)
{
case AF_INET:
#ifdef HAVE_IPV6
case AF_INET6:
#endif
break;
case AF_UNIX:
PG_RETURN_INT32(-1);
default:
PG_RETURN_NULL();
}
remote_port[0] = '\0';
ret = pg_getnameinfo_all(&beentry->st_clientaddr.addr,
beentry->st_clientaddr.salen,
NULL, 0,
remote_port, sizeof(remote_port),
NI_NUMERICHOST | NI_NUMERICSERV);
if (ret != 0)
PG_RETURN_NULL();
PG_RETURN_DATUM(DirectFunctionCall1(int4in,
CStringGetDatum(remote_port)));
}
Datum
pg_stat_get_db_numbackends(PG_FUNCTION_ARGS)
{
Oid dbid = PG_GETARG_OID(0);
int32 result;
int tot_backends = pgstat_fetch_stat_numbackends();
int beid;
result = 0;
for (beid = 1; beid <= tot_backends; beid++)
{
PgBackendStatus *beentry = pgstat_fetch_stat_beentry(beid);
if (beentry && beentry->st_databaseid == dbid)
result++;
}
PG_RETURN_INT32(result);
}
Datum
pg_stat_get_db_xact_commit(PG_FUNCTION_ARGS)
{
Oid dbid = PG_GETARG_OID(0);
int64 result;
PgStat_StatDBEntry *dbentry;
if ((dbentry = pgstat_fetch_stat_dbentry(dbid)) == NULL)
result = 0;
else
result = (int64) (dbentry->n_xact_commit);
PG_RETURN_INT64(result);
}
Datum
pg_stat_get_db_xact_rollback(PG_FUNCTION_ARGS)
{
Oid dbid = PG_GETARG_OID(0);
int64 result;
PgStat_StatDBEntry *dbentry;
if ((dbentry = pgstat_fetch_stat_dbentry(dbid)) == NULL)
result = 0;
else
result = (int64) (dbentry->n_xact_rollback);
PG_RETURN_INT64(result);
}
Datum
pg_stat_get_db_blocks_fetched(PG_FUNCTION_ARGS)
{
Oid dbid = PG_GETARG_OID(0);
int64 result;
PgStat_StatDBEntry *dbentry;
if ((dbentry = pgstat_fetch_stat_dbentry(dbid)) == NULL)
result = 0;
else
result = (int64) (dbentry->n_blocks_fetched);
PG_RETURN_INT64(result);
}
Datum
pg_stat_get_db_blocks_hit(PG_FUNCTION_ARGS)
{
Oid dbid = PG_GETARG_OID(0);
int64 result;
PgStat_StatDBEntry *dbentry;
if ((dbentry = pgstat_fetch_stat_dbentry(dbid)) == NULL)
result = 0;
else
result = (int64) (dbentry->n_blocks_hit);
PG_RETURN_INT64(result);
}
Datum
pg_stat_get_db_tuples_returned(PG_FUNCTION_ARGS)
{
Oid dbid = PG_GETARG_OID(0);
int64 result;
PgStat_StatDBEntry *dbentry;
if ((dbentry = pgstat_fetch_stat_dbentry(dbid)) == NULL)
result = 0;
else
result = (int64) (dbentry->n_tuples_returned);
PG_RETURN_INT64(result);
}
Datum
pg_stat_get_db_tuples_fetched(PG_FUNCTION_ARGS)
{
Oid dbid = PG_GETARG_OID(0);
int64 result;
PgStat_StatDBEntry *dbentry;
if ((dbentry = pgstat_fetch_stat_dbentry(dbid)) == NULL)
result = 0;
else
result = (int64) (dbentry->n_tuples_fetched);
PG_RETURN_INT64(result);
}
Datum
pg_stat_get_db_tuples_inserted(PG_FUNCTION_ARGS)
{
Oid dbid = PG_GETARG_OID(0);
int64 result;
PgStat_StatDBEntry *dbentry;
if ((dbentry = pgstat_fetch_stat_dbentry(dbid)) == NULL)
result = 0;
else
result = (int64) (dbentry->n_tuples_inserted);
PG_RETURN_INT64(result);
}
Datum
pg_stat_get_db_tuples_updated(PG_FUNCTION_ARGS)
{
Oid dbid = PG_GETARG_OID(0);
int64 result;
PgStat_StatDBEntry *dbentry;
if ((dbentry = pgstat_fetch_stat_dbentry(dbid)) == NULL)
result = 0;
else
result = (int64) (dbentry->n_tuples_updated);
PG_RETURN_INT64(result);
}
Datum
pg_stat_get_db_tuples_deleted(PG_FUNCTION_ARGS)
{
Oid dbid = PG_GETARG_OID(0);
int64 result;
PgStat_StatDBEntry *dbentry;
if ((dbentry = pgstat_fetch_stat_dbentry(dbid)) == NULL)
result = 0;
else
result = (int64) (dbentry->n_tuples_deleted);
PG_RETURN_INT64(result);
}
Datum
pg_stat_get_db_stat_reset_time(PG_FUNCTION_ARGS)
{
Oid dbid = PG_GETARG_OID(0);
TimestampTz result;
PgStat_StatDBEntry *dbentry;
if ((dbentry = pgstat_fetch_stat_dbentry(dbid)) == NULL)
result = 0;
else
result = dbentry->stat_reset_timestamp;
if (result == 0)
PG_RETURN_NULL();
else
PG_RETURN_TIMESTAMPTZ(result);
}
Datum
pg_stat_get_db_temp_files(PG_FUNCTION_ARGS)
{
Oid dbid = PG_GETARG_OID(0);
int64 result;
PgStat_StatDBEntry *dbentry;
if ((dbentry = pgstat_fetch_stat_dbentry(dbid)) == NULL)
result = 0;
else
result = dbentry->n_temp_files;
PG_RETURN_INT64(result);
}
Datum
pg_stat_get_db_temp_bytes(PG_FUNCTION_ARGS)
{
Oid dbid = PG_GETARG_OID(0);
int64 result;
PgStat_StatDBEntry *dbentry;
if ((dbentry = pgstat_fetch_stat_dbentry(dbid)) == NULL)
result = 0;
else
result = dbentry->n_temp_bytes;
PG_RETURN_INT64(result);
}
Datum
pg_stat_get_db_conflict_tablespace(PG_FUNCTION_ARGS)
{
Oid dbid = PG_GETARG_OID(0);
int64 result;
PgStat_StatDBEntry *dbentry;
if ((dbentry = pgstat_fetch_stat_dbentry(dbid)) == NULL)
result = 0;
else
result = (int64) (dbentry->n_conflict_tablespace);
PG_RETURN_INT64(result);
}
Datum
pg_stat_get_db_conflict_lock(PG_FUNCTION_ARGS)
{
Oid dbid = PG_GETARG_OID(0);
int64 result;
PgStat_StatDBEntry *dbentry;
if ((dbentry = pgstat_fetch_stat_dbentry(dbid)) == NULL)
result = 0;
else
result = (int64) (dbentry->n_conflict_lock);
PG_RETURN_INT64(result);
}
Datum
pg_stat_get_db_conflict_snapshot(PG_FUNCTION_ARGS)
{
Oid dbid = PG_GETARG_OID(0);
int64 result;
PgStat_StatDBEntry *dbentry;
if ((dbentry = pgstat_fetch_stat_dbentry(dbid)) == NULL)
result = 0;
else
result = (int64) (dbentry->n_conflict_snapshot);
PG_RETURN_INT64(result);
}
Datum
pg_stat_get_db_conflict_bufferpin(PG_FUNCTION_ARGS)
{
Oid dbid = PG_GETARG_OID(0);
int64 result;
PgStat_StatDBEntry *dbentry;
if ((dbentry = pgstat_fetch_stat_dbentry(dbid)) == NULL)
result = 0;
else
result = (int64) (dbentry->n_conflict_bufferpin);
PG_RETURN_INT64(result);
}
Datum
pg_stat_get_db_conflict_startup_deadlock(PG_FUNCTION_ARGS)
{
Oid dbid = PG_GETARG_OID(0);
int64 result;
PgStat_StatDBEntry *dbentry;
if ((dbentry = pgstat_fetch_stat_dbentry(dbid)) == NULL)
result = 0;
else
result = (int64) (dbentry->n_conflict_startup_deadlock);
PG_RETURN_INT64(result);
}
Datum
pg_stat_get_db_conflict_all(PG_FUNCTION_ARGS)
{
Oid dbid = PG_GETARG_OID(0);
int64 result;
PgStat_StatDBEntry *dbentry;
if ((dbentry = pgstat_fetch_stat_dbentry(dbid)) == NULL)
result = 0;
else
result = (int64) (dbentry->n_conflict_tablespace +
dbentry->n_conflict_lock +
dbentry->n_conflict_snapshot +
dbentry->n_conflict_bufferpin +
dbentry->n_conflict_startup_deadlock);
PG_RETURN_INT64(result);
}
Datum
pg_stat_get_db_deadlocks(PG_FUNCTION_ARGS)
{
Oid dbid = PG_GETARG_OID(0);
int64 result;
PgStat_StatDBEntry *dbentry;
if ((dbentry = pgstat_fetch_stat_dbentry(dbid)) == NULL)
result = 0;
else
result = (int64) (dbentry->n_deadlocks);
PG_RETURN_INT64(result);
}
Datum
pg_stat_get_db_checksum_failures(PG_FUNCTION_ARGS)
{
Oid dbid = PG_GETARG_OID(0);
int64 result;
PgStat_StatDBEntry *dbentry;
if (!DataChecksumsEnabled())
PG_RETURN_NULL();
if ((dbentry = pgstat_fetch_stat_dbentry(dbid)) == NULL)
result = 0;
else
result = (int64) (dbentry->n_checksum_failures);
PG_RETURN_INT64(result);
}
Datum
pg_stat_get_db_checksum_last_failure(PG_FUNCTION_ARGS)
{
Oid dbid = PG_GETARG_OID(0);
TimestampTz result;
PgStat_StatDBEntry *dbentry;
if (!DataChecksumsEnabled())
PG_RETURN_NULL();
if ((dbentry = pgstat_fetch_stat_dbentry(dbid)) == NULL)
result = 0;
else
result = dbentry->last_checksum_failure;
if (result == 0)
PG_RETURN_NULL();
else
PG_RETURN_TIMESTAMPTZ(result);
}
Datum
pg_stat_get_db_blk_read_time(PG_FUNCTION_ARGS)
{
Oid dbid = PG_GETARG_OID(0);
double result;
PgStat_StatDBEntry *dbentry;
/* convert counter from microsec to millisec for display */
if ((dbentry = pgstat_fetch_stat_dbentry(dbid)) == NULL)
result = 0;
else
result = ((double) dbentry->n_block_read_time) / 1000.0;
PG_RETURN_FLOAT8(result);
}
Datum
pg_stat_get_db_blk_write_time(PG_FUNCTION_ARGS)
{
Oid dbid = PG_GETARG_OID(0);
double result;
PgStat_StatDBEntry *dbentry;
/* convert counter from microsec to millisec for display */
if ((dbentry = pgstat_fetch_stat_dbentry(dbid)) == NULL)
result = 0;
else
result = ((double) dbentry->n_block_write_time) / 1000.0;
PG_RETURN_FLOAT8(result);
}
Datum
pg_stat_get_bgwriter_timed_checkpoints(PG_FUNCTION_ARGS)
{
PG_RETURN_INT64(pgstat_fetch_global()->timed_checkpoints);
}
Datum
pg_stat_get_bgwriter_requested_checkpoints(PG_FUNCTION_ARGS)
{
PG_RETURN_INT64(pgstat_fetch_global()->requested_checkpoints);
}
Datum
pg_stat_get_bgwriter_buf_written_checkpoints(PG_FUNCTION_ARGS)
{
PG_RETURN_INT64(pgstat_fetch_global()->buf_written_checkpoints);
}
Datum
pg_stat_get_bgwriter_buf_written_clean(PG_FUNCTION_ARGS)
{
PG_RETURN_INT64(pgstat_fetch_global()->buf_written_clean);
}
Datum
pg_stat_get_bgwriter_maxwritten_clean(PG_FUNCTION_ARGS)
{
PG_RETURN_INT64(pgstat_fetch_global()->maxwritten_clean);
}
Datum
pg_stat_get_checkpoint_write_time(PG_FUNCTION_ARGS)
{
/* time is already in msec, just convert to double for presentation */
PG_RETURN_FLOAT8((double) pgstat_fetch_global()->checkpoint_write_time);
}
Datum
pg_stat_get_checkpoint_sync_time(PG_FUNCTION_ARGS)
{
/* time is already in msec, just convert to double for presentation */
PG_RETURN_FLOAT8((double) pgstat_fetch_global()->checkpoint_sync_time);
}
Datum
pg_stat_get_bgwriter_stat_reset_time(PG_FUNCTION_ARGS)
{
PG_RETURN_TIMESTAMPTZ(pgstat_fetch_global()->stat_reset_timestamp);
}
Datum
pg_stat_get_buf_written_backend(PG_FUNCTION_ARGS)
{
PG_RETURN_INT64(pgstat_fetch_global()->buf_written_backend);
}
Datum
pg_stat_get_buf_fsync_backend(PG_FUNCTION_ARGS)
{
PG_RETURN_INT64(pgstat_fetch_global()->buf_fsync_backend);
}
Datum
pg_stat_get_buf_alloc(PG_FUNCTION_ARGS)
{
PG_RETURN_INT64(pgstat_fetch_global()->buf_alloc);
}
/*
* Returns statistics of WAL activity
*/
Datum
pg_stat_get_wal(PG_FUNCTION_ARGS)
{
#define PG_STAT_GET_WAL_COLS 2
TupleDesc tupdesc;
Datum values[PG_STAT_GET_WAL_COLS];
bool nulls[PG_STAT_GET_WAL_COLS];
PgStat_WalStats *wal_stats;
/* Initialise values and NULL flags arrays */
MemSet(values, 0, sizeof(values));
MemSet(nulls, 0, sizeof(nulls));
/* Initialise attributes information in the tuple descriptor */
tupdesc = CreateTemplateTupleDesc(PG_STAT_GET_WAL_COLS);
TupleDescInitEntry(tupdesc, (AttrNumber) 1, "wal_buffers_full",
INT8OID, -1, 0);
TupleDescInitEntry(tupdesc, (AttrNumber) 2, "stats_reset",
TIMESTAMPTZOID, -1, 0);
BlessTupleDesc(tupdesc);
/* Get statistics about WAL activity */
wal_stats = pgstat_fetch_stat_wal();
/* Fill values and NULLs */
values[0] = Int64GetDatum(wal_stats->wal_buffers_full);
values[1] = TimestampTzGetDatum(wal_stats->stat_reset_timestamp);
/* Returns the record as Datum */
PG_RETURN_DATUM(HeapTupleGetDatum(heap_form_tuple(tupdesc, values, nulls)));
}
/*
* Returns statistics of SLRU caches.
*/
Datum
pg_stat_get_slru(PG_FUNCTION_ARGS)
{
#define PG_STAT_GET_SLRU_COLS 9
ReturnSetInfo *rsinfo = (ReturnSetInfo *) fcinfo->resultinfo;
TupleDesc tupdesc;
Tuplestorestate *tupstore;
MemoryContext per_query_ctx;
MemoryContext oldcontext;
int i;
PgStat_SLRUStats *stats;
/* 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");
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);
/* request SLRU stats from the stat collector */
stats = pgstat_fetch_slru();
for (i = 0;; i++)
{
/* for each row */
Datum values[PG_STAT_GET_SLRU_COLS];
bool nulls[PG_STAT_GET_SLRU_COLS];
PgStat_SLRUStats stat = stats[i];
const char *name;
name = pgstat_slru_name(i);
if (!name)
break;
MemSet(values, 0, sizeof(values));
MemSet(nulls, 0, sizeof(nulls));
values[0] = PointerGetDatum(cstring_to_text(name));
values[1] = Int64GetDatum(stat.blocks_zeroed);
values[2] = Int64GetDatum(stat.blocks_hit);
values[3] = Int64GetDatum(stat.blocks_read);
values[4] = Int64GetDatum(stat.blocks_written);
values[5] = Int64GetDatum(stat.blocks_exists);
values[6] = Int64GetDatum(stat.flush);
values[7] = Int64GetDatum(stat.truncate);
values[8] = TimestampTzGetDatum(stat.stat_reset_timestamp);
tuplestore_putvalues(tupstore, tupdesc, values, nulls);
}
/* clean up and return the tuplestore */
tuplestore_donestoring(tupstore);
return (Datum) 0;
}
Datum
pg_stat_get_xact_numscans(PG_FUNCTION_ARGS)
{
Oid relid = PG_GETARG_OID(0);
int64 result;
PgStat_TableStatus *tabentry;
if ((tabentry = find_tabstat_entry(relid)) == NULL)
result = 0;
else
result = (int64) (tabentry->t_counts.t_numscans);
PG_RETURN_INT64(result);
}
Datum
pg_stat_get_xact_tuples_returned(PG_FUNCTION_ARGS)
{
Oid relid = PG_GETARG_OID(0);
int64 result;
PgStat_TableStatus *tabentry;
if ((tabentry = find_tabstat_entry(relid)) == NULL)
result = 0;
else
result = (int64) (tabentry->t_counts.t_tuples_returned);
PG_RETURN_INT64(result);
}
Datum
pg_stat_get_xact_tuples_fetched(PG_FUNCTION_ARGS)
{
Oid relid = PG_GETARG_OID(0);
int64 result;
PgStat_TableStatus *tabentry;
if ((tabentry = find_tabstat_entry(relid)) == NULL)
result = 0;
else
result = (int64) (tabentry->t_counts.t_tuples_fetched);
PG_RETURN_INT64(result);
}
Datum
pg_stat_get_xact_tuples_inserted(PG_FUNCTION_ARGS)
{
Oid relid = PG_GETARG_OID(0);
int64 result;
PgStat_TableStatus *tabentry;
PgStat_TableXactStatus *trans;
if ((tabentry = find_tabstat_entry(relid)) == NULL)
result = 0;
else
{
result = tabentry->t_counts.t_tuples_inserted;
/* live subtransactions' counts aren't in t_tuples_inserted yet */
for (trans = tabentry->trans; trans != NULL; trans = trans->upper)
result += trans->tuples_inserted;
}
PG_RETURN_INT64(result);
}
Datum
pg_stat_get_xact_tuples_updated(PG_FUNCTION_ARGS)
{
Oid relid = PG_GETARG_OID(0);
int64 result;
PgStat_TableStatus *tabentry;
PgStat_TableXactStatus *trans;
if ((tabentry = find_tabstat_entry(relid)) == NULL)
result = 0;
else
{
result = tabentry->t_counts.t_tuples_updated;
/* live subtransactions' counts aren't in t_tuples_updated yet */
for (trans = tabentry->trans; trans != NULL; trans = trans->upper)
result += trans->tuples_updated;
}
PG_RETURN_INT64(result);
}
Datum
pg_stat_get_xact_tuples_deleted(PG_FUNCTION_ARGS)
{
Oid relid = PG_GETARG_OID(0);
int64 result;
PgStat_TableStatus *tabentry;
PgStat_TableXactStatus *trans;
if ((tabentry = find_tabstat_entry(relid)) == NULL)
result = 0;
else
{
result = tabentry->t_counts.t_tuples_deleted;
/* live subtransactions' counts aren't in t_tuples_deleted yet */
for (trans = tabentry->trans; trans != NULL; trans = trans->upper)
result += trans->tuples_deleted;
}
PG_RETURN_INT64(result);
}
Datum
pg_stat_get_xact_tuples_hot_updated(PG_FUNCTION_ARGS)
{
Oid relid = PG_GETARG_OID(0);
int64 result;
PgStat_TableStatus *tabentry;
if ((tabentry = find_tabstat_entry(relid)) == NULL)
result = 0;
else
result = (int64) (tabentry->t_counts.t_tuples_hot_updated);
PG_RETURN_INT64(result);
}
Datum
pg_stat_get_xact_blocks_fetched(PG_FUNCTION_ARGS)
{
Oid relid = PG_GETARG_OID(0);
int64 result;
PgStat_TableStatus *tabentry;
if ((tabentry = find_tabstat_entry(relid)) == NULL)
result = 0;
else
result = (int64) (tabentry->t_counts.t_blocks_fetched);
PG_RETURN_INT64(result);
}
Datum
pg_stat_get_xact_blocks_hit(PG_FUNCTION_ARGS)
{
Oid relid = PG_GETARG_OID(0);
int64 result;
PgStat_TableStatus *tabentry;
if ((tabentry = find_tabstat_entry(relid)) == NULL)
result = 0;
else
result = (int64) (tabentry->t_counts.t_blocks_hit);
PG_RETURN_INT64(result);
}
Datum
pg_stat_get_xact_function_calls(PG_FUNCTION_ARGS)
{
Oid funcid = PG_GETARG_OID(0);
PgStat_BackendFunctionEntry *funcentry;
if ((funcentry = find_funcstat_entry(funcid)) == NULL)
PG_RETURN_NULL();
PG_RETURN_INT64(funcentry->f_counts.f_numcalls);
}
Datum
pg_stat_get_xact_function_total_time(PG_FUNCTION_ARGS)
{
Oid funcid = PG_GETARG_OID(0);
PgStat_BackendFunctionEntry *funcentry;
if ((funcentry = find_funcstat_entry(funcid)) == NULL)
PG_RETURN_NULL();
PG_RETURN_FLOAT8(INSTR_TIME_GET_MILLISEC(funcentry->f_counts.f_total_time));
}
Datum
pg_stat_get_xact_function_self_time(PG_FUNCTION_ARGS)
{
Oid funcid = PG_GETARG_OID(0);
PgStat_BackendFunctionEntry *funcentry;
if ((funcentry = find_funcstat_entry(funcid)) == NULL)
PG_RETURN_NULL();
PG_RETURN_FLOAT8(INSTR_TIME_GET_MILLISEC(funcentry->f_counts.f_self_time));
}
/* Get the timestamp of the current statistics snapshot */
Datum
pg_stat_get_snapshot_timestamp(PG_FUNCTION_ARGS)
{
PG_RETURN_TIMESTAMPTZ(pgstat_fetch_global()->stats_timestamp);
}
/* Discard the active statistics snapshot */
Datum
pg_stat_clear_snapshot(PG_FUNCTION_ARGS)
{
pgstat_clear_snapshot();
PG_RETURN_VOID();
}
/* Reset all counters for the current database */
Datum
pg_stat_reset(PG_FUNCTION_ARGS)
{
pgstat_reset_counters();
PG_RETURN_VOID();
}
/* Reset some shared cluster-wide counters */
Datum
pg_stat_reset_shared(PG_FUNCTION_ARGS)
{
char *target = text_to_cstring(PG_GETARG_TEXT_PP(0));
pgstat_reset_shared_counters(target);
PG_RETURN_VOID();
}
/* Reset a single counter in the current database */
Datum
pg_stat_reset_single_table_counters(PG_FUNCTION_ARGS)
{
Oid taboid = PG_GETARG_OID(0);
pgstat_reset_single_counter(taboid, RESET_TABLE);
PG_RETURN_VOID();
}
Datum
pg_stat_reset_single_function_counters(PG_FUNCTION_ARGS)
{
Oid funcoid = PG_GETARG_OID(0);
pgstat_reset_single_counter(funcoid, RESET_FUNCTION);
PG_RETURN_VOID();
}
/* Reset SLRU counters (a specific one or all of them). */
Datum
pg_stat_reset_slru(PG_FUNCTION_ARGS)
{
char *target = NULL;
if (!PG_ARGISNULL(0))
target = text_to_cstring(PG_GETARG_TEXT_PP(0));
pgstat_reset_slru_counter(target);
PG_RETURN_VOID();
}
/* Reset replication slots stats (a specific one or all of them). */
Datum
pg_stat_reset_replication_slot(PG_FUNCTION_ARGS)
{
char *target = NULL;
if (!PG_ARGISNULL(0))
target = text_to_cstring(PG_GETARG_TEXT_PP(0));
pgstat_reset_replslot_counter(target);
PG_RETURN_VOID();
}
Datum
pg_stat_get_archiver(PG_FUNCTION_ARGS)
{
TupleDesc tupdesc;
Datum values[7];
bool nulls[7];
PgStat_ArchiverStats *archiver_stats;
/* Initialise values and NULL flags arrays */
MemSet(values, 0, sizeof(values));
MemSet(nulls, 0, sizeof(nulls));
/* Initialise attributes information in the tuple descriptor */
tupdesc = CreateTemplateTupleDesc(7);
TupleDescInitEntry(tupdesc, (AttrNumber) 1, "archived_count",
INT8OID, -1, 0);
TupleDescInitEntry(tupdesc, (AttrNumber) 2, "last_archived_wal",
TEXTOID, -1, 0);
TupleDescInitEntry(tupdesc, (AttrNumber) 3, "last_archived_time",
TIMESTAMPTZOID, -1, 0);
TupleDescInitEntry(tupdesc, (AttrNumber) 4, "failed_count",
INT8OID, -1, 0);
TupleDescInitEntry(tupdesc, (AttrNumber) 5, "last_failed_wal",
TEXTOID, -1, 0);
TupleDescInitEntry(tupdesc, (AttrNumber) 6, "last_failed_time",
TIMESTAMPTZOID, -1, 0);
TupleDescInitEntry(tupdesc, (AttrNumber) 7, "stats_reset",
TIMESTAMPTZOID, -1, 0);
BlessTupleDesc(tupdesc);
/* Get statistics about the archiver process */
archiver_stats = pgstat_fetch_stat_archiver();
/* Fill values and NULLs */
values[0] = Int64GetDatum(archiver_stats->archived_count);
if (*(archiver_stats->last_archived_wal) == '\0')
nulls[1] = true;
else
values[1] = CStringGetTextDatum(archiver_stats->last_archived_wal);
if (archiver_stats->last_archived_timestamp == 0)
nulls[2] = true;
else
values[2] = TimestampTzGetDatum(archiver_stats->last_archived_timestamp);
values[3] = Int64GetDatum(archiver_stats->failed_count);
if (*(archiver_stats->last_failed_wal) == '\0')
nulls[4] = true;
else
values[4] = CStringGetTextDatum(archiver_stats->last_failed_wal);
if (archiver_stats->last_failed_timestamp == 0)
nulls[5] = true;
else
values[5] = TimestampTzGetDatum(archiver_stats->last_failed_timestamp);
if (archiver_stats->stat_reset_timestamp == 0)
nulls[6] = true;
else
values[6] = TimestampTzGetDatum(archiver_stats->stat_reset_timestamp);
/* Returns the record as Datum */
PG_RETURN_DATUM(HeapTupleGetDatum(heap_form_tuple(tupdesc, values, nulls)));
}
/* Get the statistics for the replication slots */
Datum
pg_stat_get_replication_slots(PG_FUNCTION_ARGS)
{
#define PG_STAT_GET_REPLICATION_SLOT_COLS 5
ReturnSetInfo *rsinfo = (ReturnSetInfo *) fcinfo->resultinfo;
TupleDesc tupdesc;
Tuplestorestate *tupstore;
MemoryContext per_query_ctx;
MemoryContext oldcontext;
PgStat_ReplSlotStats *slotstats;
int nstats;
int i;
/* 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");
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);
slotstats = pgstat_fetch_replslot(&nstats);
for (i = 0; i < nstats; i++)
{
Datum values[PG_STAT_GET_REPLICATION_SLOT_COLS];
bool nulls[PG_STAT_GET_REPLICATION_SLOT_COLS];
PgStat_ReplSlotStats *s = &(slotstats[i]);
MemSet(values, 0, sizeof(values));
MemSet(nulls, 0, sizeof(nulls));
values[0] = PointerGetDatum(cstring_to_text(s->slotname));
values[1] = Int64GetDatum(s->spill_txns);
values[2] = Int64GetDatum(s->spill_count);
values[3] = Int64GetDatum(s->spill_bytes);
if (s->stat_reset_timestamp == 0)
nulls[4] = true;
else
values[4] = TimestampTzGetDatum(s->stat_reset_timestamp);
tuplestore_putvalues(tupstore, tupdesc, values, nulls);
}
tuplestore_donestoring(tupstore);
return (Datum) 0;
}
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