PostgreSQL Source Code  git master
Functions
pg_controldata.c File Reference
#include "postgres.h"
#include "access/htup_details.h"
#include "access/transam.h"
#include "access/xlog.h"
#include "access/xlog_internal.h"
#include "catalog/pg_control.h"
#include "catalog/pg_type.h"
#include "common/controldata_utils.h"
#include "funcapi.h"
#include "miscadmin.h"
#include "utils/builtins.h"
#include "utils/pg_lsn.h"
#include "utils/timestamp.h"
Include dependency graph for pg_controldata.c:

Go to the source code of this file.

Functions

Datum pg_control_system (PG_FUNCTION_ARGS)
 
Datum pg_control_checkpoint (PG_FUNCTION_ARGS)
 
Datum pg_control_recovery (PG_FUNCTION_ARGS)
 
Datum pg_control_init (PG_FUNCTION_ARGS)
 

Function Documentation

◆ pg_control_checkpoint()

Datum pg_control_checkpoint ( PG_FUNCTION_ARGS  )

Definition at line 80 of file pg_controldata.c.

81 {
82  Datum values[18];
83  bool nulls[18];
84  TupleDesc tupdesc;
85  HeapTuple htup;
86  ControlFileData *ControlFile;
87  XLogSegNo segno;
88  char xlogfilename[MAXFNAMELEN];
89  bool crc_ok;
90 
91  /*
92  * Construct a tuple descriptor for the result row. This must match this
93  * function's pg_proc entry!
94  */
95  tupdesc = CreateTemplateTupleDesc(18);
96  TupleDescInitEntry(tupdesc, (AttrNumber) 1, "checkpoint_lsn",
97  PG_LSNOID, -1, 0);
98  TupleDescInitEntry(tupdesc, (AttrNumber) 2, "redo_lsn",
99  PG_LSNOID, -1, 0);
100  TupleDescInitEntry(tupdesc, (AttrNumber) 3, "redo_wal_file",
101  TEXTOID, -1, 0);
102  TupleDescInitEntry(tupdesc, (AttrNumber) 4, "timeline_id",
103  INT4OID, -1, 0);
104  TupleDescInitEntry(tupdesc, (AttrNumber) 5, "prev_timeline_id",
105  INT4OID, -1, 0);
106  TupleDescInitEntry(tupdesc, (AttrNumber) 6, "full_page_writes",
107  BOOLOID, -1, 0);
108  TupleDescInitEntry(tupdesc, (AttrNumber) 7, "next_xid",
109  TEXTOID, -1, 0);
110  TupleDescInitEntry(tupdesc, (AttrNumber) 8, "next_oid",
111  OIDOID, -1, 0);
112  TupleDescInitEntry(tupdesc, (AttrNumber) 9, "next_multixact_id",
113  XIDOID, -1, 0);
114  TupleDescInitEntry(tupdesc, (AttrNumber) 10, "next_multi_offset",
115  XIDOID, -1, 0);
116  TupleDescInitEntry(tupdesc, (AttrNumber) 11, "oldest_xid",
117  XIDOID, -1, 0);
118  TupleDescInitEntry(tupdesc, (AttrNumber) 12, "oldest_xid_dbid",
119  OIDOID, -1, 0);
120  TupleDescInitEntry(tupdesc, (AttrNumber) 13, "oldest_active_xid",
121  XIDOID, -1, 0);
122  TupleDescInitEntry(tupdesc, (AttrNumber) 14, "oldest_multi_xid",
123  XIDOID, -1, 0);
124  TupleDescInitEntry(tupdesc, (AttrNumber) 15, "oldest_multi_dbid",
125  OIDOID, -1, 0);
126  TupleDescInitEntry(tupdesc, (AttrNumber) 16, "oldest_commit_ts_xid",
127  XIDOID, -1, 0);
128  TupleDescInitEntry(tupdesc, (AttrNumber) 17, "newest_commit_ts_xid",
129  XIDOID, -1, 0);
130  TupleDescInitEntry(tupdesc, (AttrNumber) 18, "checkpoint_time",
131  TIMESTAMPTZOID, -1, 0);
132  tupdesc = BlessTupleDesc(tupdesc);
133 
134  /* Read the control file. */
135  ControlFile = get_controlfile(DataDir, &crc_ok);
136  if (!crc_ok)
137  ereport(ERROR,
138  (errmsg("calculated CRC checksum does not match value stored in file")));
139 
140  /*
141  * Calculate name of the WAL file containing the latest checkpoint's REDO
142  * start point.
143  */
144  XLByteToSeg(ControlFile->checkPointCopy.redo, segno, wal_segment_size);
145  XLogFileName(xlogfilename, ControlFile->checkPointCopy.ThisTimeLineID,
146  segno, wal_segment_size);
147 
148  /* Populate the values and null arrays */
149  values[0] = LSNGetDatum(ControlFile->checkPoint);
150  nulls[0] = false;
151 
152  values[1] = LSNGetDatum(ControlFile->checkPointCopy.redo);
153  nulls[1] = false;
154 
155  values[2] = CStringGetTextDatum(xlogfilename);
156  nulls[2] = false;
157 
158  values[3] = Int32GetDatum(ControlFile->checkPointCopy.ThisTimeLineID);
159  nulls[3] = false;
160 
161  values[4] = Int32GetDatum(ControlFile->checkPointCopy.PrevTimeLineID);
162  nulls[4] = false;
163 
164  values[5] = BoolGetDatum(ControlFile->checkPointCopy.fullPageWrites);
165  nulls[5] = false;
166 
167  values[6] = CStringGetTextDatum(psprintf("%u:%u",
168  EpochFromFullTransactionId(ControlFile->checkPointCopy.nextXid),
169  XidFromFullTransactionId(ControlFile->checkPointCopy.nextXid)));
170  nulls[6] = false;
171 
172  values[7] = ObjectIdGetDatum(ControlFile->checkPointCopy.nextOid);
173  nulls[7] = false;
174 
175  values[8] = TransactionIdGetDatum(ControlFile->checkPointCopy.nextMulti);
176  nulls[8] = false;
177 
178  values[9] = TransactionIdGetDatum(ControlFile->checkPointCopy.nextMultiOffset);
179  nulls[9] = false;
180 
181  values[10] = TransactionIdGetDatum(ControlFile->checkPointCopy.oldestXid);
182  nulls[10] = false;
183 
184  values[11] = ObjectIdGetDatum(ControlFile->checkPointCopy.oldestXidDB);
185  nulls[11] = false;
186 
187  values[12] = TransactionIdGetDatum(ControlFile->checkPointCopy.oldestActiveXid);
188  nulls[12] = false;
189 
190  values[13] = TransactionIdGetDatum(ControlFile->checkPointCopy.oldestMulti);
191  nulls[13] = false;
192 
193  values[14] = ObjectIdGetDatum(ControlFile->checkPointCopy.oldestMultiDB);
194  nulls[14] = false;
195 
196  values[15] = TransactionIdGetDatum(ControlFile->checkPointCopy.oldestCommitTsXid);
197  nulls[15] = false;
198 
199  values[16] = TransactionIdGetDatum(ControlFile->checkPointCopy.newestCommitTsXid);
200  nulls[16] = false;
201 
202  values[17] = TimestampTzGetDatum(time_t_to_timestamptz(ControlFile->checkPointCopy.time));
203  nulls[17] = false;
204 
205  htup = heap_form_tuple(tupdesc, values, nulls);
206 
207  PG_RETURN_DATUM(HeapTupleGetDatum(htup));
208 }
AttrNumber
int16 AttrNumber
Definition: attnum.h:21
time_t_to_timestamptz
TimestampTz time_t_to_timestamptz(pg_time_t tm)
Definition: timestamp.c:1726
values
static Datum values[MAXATTR]
Definition: bootstrap.c:156
CStringGetTextDatum
#define CStringGetTextDatum(s)
Definition: builtins.h:85
get_controlfile
ControlFileData * get_controlfile(const char *DataDir, bool *crc_ok_p)
Definition: controldata_utils.c:52
errmsg
int errmsg(const char *fmt,...)
Definition: elog.c:904
ERROR
#define ERROR
Definition: elog.h:33
ereport
#define ereport(elevel,...)
Definition: elog.h:143
BlessTupleDesc
TupleDesc BlessTupleDesc(TupleDesc tupdesc)
Definition: execTuples.c:2071
PG_RETURN_DATUM
#define PG_RETURN_DATUM(x)
Definition: fmgr.h:353
HeapTupleGetDatum
#define HeapTupleGetDatum(tuple)
Definition: funcapi.h:220
DataDir
char * DataDir
Definition: globals.c:66
heap_form_tuple
HeapTuple heap_form_tuple(TupleDesc tupleDescriptor, Datum *values, bool *isnull)
Definition: heaptuple.c:1020
LSNGetDatum
#define LSNGetDatum(X)
Definition: pg_lsn.h:22
TransactionIdGetDatum
#define TransactionIdGetDatum(X)
Definition: postgres.h:565
Datum
uintptr_t Datum
Definition: postgres.h:411
ObjectIdGetDatum
#define ObjectIdGetDatum(X)
Definition: postgres.h:551
BoolGetDatum
#define BoolGetDatum(X)
Definition: postgres.h:446
Int32GetDatum
#define Int32GetDatum(X)
Definition: postgres.h:523
psprintf
char * psprintf(const char *fmt,...)
Definition: psprintf.c:46
CheckPoint::oldestMultiDB
Oid oldestMultiDB
Definition: pg_control.h:50
CheckPoint::oldestMulti
MultiXactId oldestMulti
Definition: pg_control.h:49
CheckPoint::nextMultiOffset
MultiXactOffset nextMultiOffset
Definition: pg_control.h:46
CheckPoint::newestCommitTsXid
TransactionId newestCommitTsXid
Definition: pg_control.h:54
CheckPoint::oldestXid
TransactionId oldestXid
Definition: pg_control.h:47
CheckPoint::PrevTimeLineID
TimeLineID PrevTimeLineID
Definition: pg_control.h:40
CheckPoint::ThisTimeLineID
TimeLineID ThisTimeLineID
Definition: pg_control.h:39
CheckPoint::nextOid
Oid nextOid
Definition: pg_control.h:44
CheckPoint::oldestActiveXid
TransactionId oldestActiveXid
Definition: pg_control.h:63
CheckPoint::fullPageWrites
bool fullPageWrites
Definition: pg_control.h:42
CheckPoint::nextMulti
MultiXactId nextMulti
Definition: pg_control.h:45
CheckPoint::nextXid
FullTransactionId nextXid
Definition: pg_control.h:43
CheckPoint::oldestCommitTsXid
TransactionId oldestCommitTsXid
Definition: pg_control.h:52
CheckPoint::time
pg_time_t time
Definition: pg_control.h:51
CheckPoint::redo
XLogRecPtr redo
Definition: pg_control.h:37
CheckPoint::oldestXidDB
Oid oldestXidDB
Definition: pg_control.h:48
ControlFileData::checkPointCopy
CheckPoint checkPointCopy
Definition: pg_control.h:133
ControlFileData::checkPoint
XLogRecPtr checkPoint
Definition: pg_control.h:131
EpochFromFullTransactionId
#define EpochFromFullTransactionId(x)
Definition: transam.h:47
XidFromFullTransactionId
#define XidFromFullTransactionId(x)
Definition: transam.h:48
CreateTemplateTupleDesc
TupleDesc CreateTemplateTupleDesc(int natts)
Definition: tupdesc.c:45
TupleDescInitEntry
void TupleDescInitEntry(TupleDesc desc, AttrNumber attributeNumber, const char *attributeName, Oid oidtypeid, int32 typmod, int attdim)
Definition: tupdesc.c:583
TimestampTzGetDatum
#define TimestampTzGetDatum(X)
Definition: timestamp.h:32
wal_segment_size
int wal_segment_size
Definition: xlog.c:144
ControlFile
static ControlFileData * ControlFile
Definition: xlog.c:566
XLogFileName
#define XLogFileName(fname, tli, logSegNo, wal_segsz_bytes)
Definition: xlog_internal.h:165
MAXFNAMELEN
#define MAXFNAMELEN
Definition: xlog_internal.h:156
XLByteToSeg
#define XLByteToSeg(xlrp, logSegNo, wal_segsz_bytes)
Definition: xlog_internal.h:117
XLogSegNo
uint64 XLogSegNo
Definition: xlogdefs.h:48

References BlessTupleDesc(), BoolGetDatum, ControlFileData::checkPoint, ControlFileData::checkPointCopy, ControlFile, CreateTemplateTupleDesc(), CStringGetTextDatum, DataDir, EpochFromFullTransactionId, ereport, errmsg(), ERROR, CheckPoint::fullPageWrites, get_controlfile(), heap_form_tuple(), HeapTupleGetDatum, Int32GetDatum, LSNGetDatum, MAXFNAMELEN, CheckPoint::newestCommitTsXid, CheckPoint::nextMulti, CheckPoint::nextMultiOffset, CheckPoint::nextOid, CheckPoint::nextXid, ObjectIdGetDatum, CheckPoint::oldestActiveXid, CheckPoint::oldestCommitTsXid, CheckPoint::oldestMulti, CheckPoint::oldestMultiDB, CheckPoint::oldestXid, CheckPoint::oldestXidDB, PG_RETURN_DATUM, CheckPoint::PrevTimeLineID, psprintf(), CheckPoint::redo, CheckPoint::ThisTimeLineID, CheckPoint::time, time_t_to_timestamptz(), TimestampTzGetDatum, TransactionIdGetDatum, TupleDescInitEntry(), values, wal_segment_size, XidFromFullTransactionId, XLByteToSeg, and XLogFileName.

◆ pg_control_init()

Datum pg_control_init ( PG_FUNCTION_ARGS  )

Definition at line 264 of file pg_controldata.c.

265 {
266  Datum values[11];
267  bool nulls[11];
268  TupleDesc tupdesc;
269  HeapTuple htup;
270  ControlFileData *ControlFile;
271  bool crc_ok;
272 
273  /*
274  * Construct a tuple descriptor for the result row. This must match this
275  * function's pg_proc entry!
276  */
277  tupdesc = CreateTemplateTupleDesc(11);
278  TupleDescInitEntry(tupdesc, (AttrNumber) 1, "max_data_alignment",
279  INT4OID, -1, 0);
280  TupleDescInitEntry(tupdesc, (AttrNumber) 2, "database_block_size",
281  INT4OID, -1, 0);
282  TupleDescInitEntry(tupdesc, (AttrNumber) 3, "blocks_per_segment",
283  INT4OID, -1, 0);
284  TupleDescInitEntry(tupdesc, (AttrNumber) 4, "wal_block_size",
285  INT4OID, -1, 0);
286  TupleDescInitEntry(tupdesc, (AttrNumber) 5, "bytes_per_wal_segment",
287  INT4OID, -1, 0);
288  TupleDescInitEntry(tupdesc, (AttrNumber) 6, "max_identifier_length",
289  INT4OID, -1, 0);
290  TupleDescInitEntry(tupdesc, (AttrNumber) 7, "max_index_columns",
291  INT4OID, -1, 0);
292  TupleDescInitEntry(tupdesc, (AttrNumber) 8, "max_toast_chunk_size",
293  INT4OID, -1, 0);
294  TupleDescInitEntry(tupdesc, (AttrNumber) 9, "large_object_chunk_size",
295  INT4OID, -1, 0);
296  TupleDescInitEntry(tupdesc, (AttrNumber) 10, "float8_pass_by_value",
297  BOOLOID, -1, 0);
298  TupleDescInitEntry(tupdesc, (AttrNumber) 11, "data_page_checksum_version",
299  INT4OID, -1, 0);
300  tupdesc = BlessTupleDesc(tupdesc);
301 
302  /* read the control file */
303  ControlFile = get_controlfile(DataDir, &crc_ok);
304  if (!crc_ok)
305  ereport(ERROR,
306  (errmsg("calculated CRC checksum does not match value stored in file")));
307 
308  values[0] = Int32GetDatum(ControlFile->maxAlign);
309  nulls[0] = false;
310 
311  values[1] = Int32GetDatum(ControlFile->blcksz);
312  nulls[1] = false;
313 
314  values[2] = Int32GetDatum(ControlFile->relseg_size);
315  nulls[2] = false;
316 
317  values[3] = Int32GetDatum(ControlFile->xlog_blcksz);
318  nulls[3] = false;
319 
320  values[4] = Int32GetDatum(ControlFile->xlog_seg_size);
321  nulls[4] = false;
322 
323  values[5] = Int32GetDatum(ControlFile->nameDataLen);
324  nulls[5] = false;
325 
326  values[6] = Int32GetDatum(ControlFile->indexMaxKeys);
327  nulls[6] = false;
328 
329  values[7] = Int32GetDatum(ControlFile->toast_max_chunk_size);
330  nulls[7] = false;
331 
332  values[8] = Int32GetDatum(ControlFile->loblksize);
333  nulls[8] = false;
334 
335  values[9] = BoolGetDatum(ControlFile->float8ByVal);
336  nulls[9] = false;
337 
338  values[10] = Int32GetDatum(ControlFile->data_checksum_version);
339  nulls[10] = false;
340 
341  htup = heap_form_tuple(tupdesc, values, nulls);
342 
343  PG_RETURN_DATUM(HeapTupleGetDatum(htup));
344 }
ControlFileData::xlog_seg_size
uint32 xlog_seg_size
Definition: pg_control.h:209
ControlFileData::nameDataLen
uint32 nameDataLen
Definition: pg_control.h:211
ControlFileData::data_checksum_version
uint32 data_checksum_version
Definition: pg_control.h:220
ControlFileData::indexMaxKeys
uint32 indexMaxKeys
Definition: pg_control.h:212
ControlFileData::relseg_size
uint32 relseg_size
Definition: pg_control.h:206
ControlFileData::xlog_blcksz
uint32 xlog_blcksz
Definition: pg_control.h:208
ControlFileData::loblksize
uint32 loblksize
Definition: pg_control.h:215
ControlFileData::toast_max_chunk_size
uint32 toast_max_chunk_size
Definition: pg_control.h:214

References ControlFileData::blcksz, BlessTupleDesc(), BoolGetDatum, ControlFile, CreateTemplateTupleDesc(), ControlFileData::data_checksum_version, DataDir, ereport, errmsg(), ERROR, ControlFileData::float8ByVal, get_controlfile(), heap_form_tuple(), HeapTupleGetDatum, ControlFileData::indexMaxKeys, Int32GetDatum, ControlFileData::loblksize, ControlFileData::maxAlign, ControlFileData::nameDataLen, PG_RETURN_DATUM, ControlFileData::relseg_size, ControlFileData::toast_max_chunk_size, TupleDescInitEntry(), values, ControlFileData::xlog_blcksz, and ControlFileData::xlog_seg_size.

◆ pg_control_recovery()

Datum pg_control_recovery ( PG_FUNCTION_ARGS  )

Definition at line 211 of file pg_controldata.c.

212 {
213  Datum values[5];
214  bool nulls[5];
215  TupleDesc tupdesc;
216  HeapTuple htup;
217  ControlFileData *ControlFile;
218  bool crc_ok;
219 
220  /*
221  * Construct a tuple descriptor for the result row. This must match this
222  * function's pg_proc entry!
223  */
224  tupdesc = CreateTemplateTupleDesc(5);
225  TupleDescInitEntry(tupdesc, (AttrNumber) 1, "min_recovery_end_lsn",
226  PG_LSNOID, -1, 0);
227  TupleDescInitEntry(tupdesc, (AttrNumber) 2, "min_recovery_end_timeline",
228  INT4OID, -1, 0);
229  TupleDescInitEntry(tupdesc, (AttrNumber) 3, "backup_start_lsn",
230  PG_LSNOID, -1, 0);
231  TupleDescInitEntry(tupdesc, (AttrNumber) 4, "backup_end_lsn",
232  PG_LSNOID, -1, 0);
233  TupleDescInitEntry(tupdesc, (AttrNumber) 5, "end_of_backup_record_required",
234  BOOLOID, -1, 0);
235  tupdesc = BlessTupleDesc(tupdesc);
236 
237  /* read the control file */
238  ControlFile = get_controlfile(DataDir, &crc_ok);
239  if (!crc_ok)
240  ereport(ERROR,
241  (errmsg("calculated CRC checksum does not match value stored in file")));
242 
243  values[0] = LSNGetDatum(ControlFile->minRecoveryPoint);
244  nulls[0] = false;
245 
246  values[1] = Int32GetDatum(ControlFile->minRecoveryPointTLI);
247  nulls[1] = false;
248 
249  values[2] = LSNGetDatum(ControlFile->backupStartPoint);
250  nulls[2] = false;
251 
252  values[3] = LSNGetDatum(ControlFile->backupEndPoint);
253  nulls[3] = false;
254 
255  values[4] = BoolGetDatum(ControlFile->backupEndRequired);
256  nulls[4] = false;
257 
258  htup = heap_form_tuple(tupdesc, values, nulls);
259 
260  PG_RETURN_DATUM(HeapTupleGetDatum(htup));
261 }
ControlFileData::backupStartPoint
XLogRecPtr backupStartPoint
Definition: pg_control.h:168
ControlFileData::backupEndRequired
bool backupEndRequired
Definition: pg_control.h:170
ControlFileData::backupEndPoint
XLogRecPtr backupEndPoint
Definition: pg_control.h:169
ControlFileData::minRecoveryPoint
XLogRecPtr minRecoveryPoint
Definition: pg_control.h:166
ControlFileData::minRecoveryPointTLI
TimeLineID minRecoveryPointTLI
Definition: pg_control.h:167

References ControlFileData::backupEndPoint, ControlFileData::backupEndRequired, ControlFileData::backupStartPoint, BlessTupleDesc(), BoolGetDatum, ControlFile, CreateTemplateTupleDesc(), DataDir, ereport, errmsg(), ERROR, get_controlfile(), heap_form_tuple(), HeapTupleGetDatum, Int32GetDatum, LSNGetDatum, ControlFileData::minRecoveryPoint, ControlFileData::minRecoveryPointTLI, PG_RETURN_DATUM, TupleDescInitEntry(), and values.

◆ pg_control_system()

Datum pg_control_system ( PG_FUNCTION_ARGS  )

Definition at line 32 of file pg_controldata.c.

33 {
34  Datum values[4];
35  bool nulls[4];
36  TupleDesc tupdesc;
37  HeapTuple htup;
38  ControlFileData *ControlFile;
39  bool crc_ok;
40 
41  /*
42  * Construct a tuple descriptor for the result row. This must match this
43  * function's pg_proc entry!
44  */
45  tupdesc = CreateTemplateTupleDesc(4);
46  TupleDescInitEntry(tupdesc, (AttrNumber) 1, "pg_control_version",
47  INT4OID, -1, 0);
48  TupleDescInitEntry(tupdesc, (AttrNumber) 2, "catalog_version_no",
49  INT4OID, -1, 0);
50  TupleDescInitEntry(tupdesc, (AttrNumber) 3, "system_identifier",
51  INT8OID, -1, 0);
52  TupleDescInitEntry(tupdesc, (AttrNumber) 4, "pg_control_last_modified",
53  TIMESTAMPTZOID, -1, 0);
54  tupdesc = BlessTupleDesc(tupdesc);
55 
56  /* read the control file */
57  ControlFile = get_controlfile(DataDir, &crc_ok);
58  if (!crc_ok)
59  ereport(ERROR,
60  (errmsg("calculated CRC checksum does not match value stored in file")));
61 
62  values[0] = Int32GetDatum(ControlFile->pg_control_version);
63  nulls[0] = false;
64 
65  values[1] = Int32GetDatum(ControlFile->catalog_version_no);
66  nulls[1] = false;
67 
68  values[2] = Int64GetDatum(ControlFile->system_identifier);
69  nulls[2] = false;
70 
71  values[3] = TimestampTzGetDatum(time_t_to_timestamptz(ControlFile->time));
72  nulls[3] = false;
73 
74  htup = heap_form_tuple(tupdesc, values, nulls);
75 
76  PG_RETURN_DATUM(HeapTupleGetDatum(htup));
77 }
Int64GetDatum
Datum Int64GetDatum(int64 X)
Definition: fmgr.c:1683
ControlFileData::pg_control_version
uint32 pg_control_version
Definition: pg_control.h:123
ControlFileData::time
pg_time_t time
Definition: pg_control.h:130
ControlFileData::system_identifier
uint64 system_identifier
Definition: pg_control.h:108
ControlFileData::catalog_version_no
uint32 catalog_version_no
Definition: pg_control.h:124

References BlessTupleDesc(), ControlFileData::catalog_version_no, ControlFile, CreateTemplateTupleDesc(), DataDir, ereport, errmsg(), ERROR, get_controlfile(), heap_form_tuple(), HeapTupleGetDatum, Int32GetDatum, Int64GetDatum(), ControlFileData::pg_control_version, PG_RETURN_DATUM, ControlFileData::system_identifier, ControlFileData::time, time_t_to_timestamptz(), TimestampTzGetDatum, TupleDescInitEntry(), and values.