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Commitaeec457

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Add SQL type xid8 to expose FullTransactionId to users.
Similar to xid, but 64 bits wide. This new type is suitable for use invarious system views and administration functions.Reviewed-by: Fujii Masao <masao.fujii@oss.nttdata.com>Reviewed-by: Takao Fujii <btfujiitkp@oss.nttdata.com>Reviewed-by: Yoshikazu Imai <imai.yoshikazu@fujitsu.com>Reviewed-by: Mark Dilger <mark.dilger@enterprisedb.com>Discussion:https://postgr.es/m/20190725000636.666m5mad25wfbrri%40alap3.anarazel.de
1 parent4bea576 commitaeec457

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20 files changed

+464
-2
lines changed

20 files changed

+464
-2
lines changed

‎doc/src/sgml/datatype.sgml

Lines changed: 7 additions & 0 deletions
Original file line numberDiff line numberDiff line change
@@ -4516,6 +4516,10 @@ INSERT INTO mytable VALUES(-1); -- fails
45164516
<primary>regtype</primary>
45174517
</indexterm>
45184518

4519+
<indexterm zone="datatype-oid">
4520+
<primary>xid8</primary>
4521+
</indexterm>
4522+
45194523
<indexterm zone="datatype-oid">
45204524
<primary>cid</primary>
45214525
</indexterm>
@@ -4719,6 +4723,9 @@ SELECT * FROM pg_attribute
47194723
Another identifier type used by the system is <type>xid</type>, or transaction
47204724
(abbreviated <abbrev>xact</abbrev>) identifier. This is the data type of the system columns
47214725
<structfield>xmin</structfield> and <structfield>xmax</structfield>. Transaction identifiers are 32-bit quantities.
4726+
In some contexts, a 64-bit variant <type>xid8</type> is used. Unlike
4727+
<type>xid</type> values, <type>xid8</type> values increase strictly
4728+
monotonically and cannot be reused in the lifetime of a database cluster.
47224729
</para>
47234730

47244731
<para>

‎src/backend/access/hash/hashvalidate.c

Lines changed: 3 additions & 0 deletions
Original file line numberDiff line numberDiff line change
@@ -317,6 +317,9 @@ check_hash_func_signature(Oid funcid, int16 amprocnum, Oid argtype)
317317
(argtype==DATEOID||
318318
argtype==XIDOID||argtype==CIDOID))
319319
/* okay, allowed use of hashint4() */ ;
320+
elseif ((funcid==F_HASHINT8||funcid==F_HASHINT8EXTENDED)&&
321+
(argtype==XID8OID))
322+
/* okay, allowed use of hashint8() */ ;
320323
elseif ((funcid==F_TIMESTAMP_HASH||
321324
funcid==F_TIMESTAMP_HASH_EXTENDED)&&
322325
argtype==TIMESTAMPTZOID)

‎src/backend/utils/adt/xid.c

Lines changed: 116 additions & 0 deletions
Original file line numberDiff line numberDiff line change
@@ -21,6 +21,7 @@
2121
#include"access/xact.h"
2222
#include"libpq/pqformat.h"
2323
#include"utils/builtins.h"
24+
#include"utils/xid8.h"
2425

2526
#definePG_GETARG_TRANSACTIONID(n)DatumGetTransactionId(PG_GETARG_DATUM(n))
2627
#definePG_RETURN_TRANSACTIONID(x)return TransactionIdGetDatum(x)
@@ -147,6 +148,121 @@ xidComparator(const void *arg1, const void *arg2)
147148
return0;
148149
}
149150

151+
Datum
152+
xid8toxid(PG_FUNCTION_ARGS)
153+
{
154+
FullTransactionIdfxid=PG_GETARG_FULLTRANSACTIONID(0);
155+
156+
PG_RETURN_TRANSACTIONID(XidFromFullTransactionId(fxid));
157+
}
158+
159+
Datum
160+
xid8in(PG_FUNCTION_ARGS)
161+
{
162+
char*str=PG_GETARG_CSTRING(0);
163+
164+
PG_RETURN_FULLTRANSACTIONID(FullTransactionIdFromU64(pg_strtouint64(str,NULL,0)));
165+
}
166+
167+
Datum
168+
xid8out(PG_FUNCTION_ARGS)
169+
{
170+
FullTransactionIdfxid=PG_GETARG_FULLTRANSACTIONID(0);
171+
char*result= (char*)palloc(21);
172+
173+
snprintf(result,21,UINT64_FORMAT,U64FromFullTransactionId(fxid));
174+
PG_RETURN_CSTRING(result);
175+
}
176+
177+
Datum
178+
xid8recv(PG_FUNCTION_ARGS)
179+
{
180+
StringInfobuf= (StringInfo)PG_GETARG_POINTER(0);
181+
uint64value;
182+
183+
value= (uint64)pq_getmsgint64(buf);
184+
PG_RETURN_FULLTRANSACTIONID(FullTransactionIdFromU64(value));
185+
}
186+
187+
Datum
188+
xid8send(PG_FUNCTION_ARGS)
189+
{
190+
FullTransactionIdarg1=PG_GETARG_FULLTRANSACTIONID(0);
191+
StringInfoDatabuf;
192+
193+
pq_begintypsend(&buf);
194+
pq_sendint64(&buf, (uint64)U64FromFullTransactionId(arg1));
195+
PG_RETURN_BYTEA_P(pq_endtypsend(&buf));
196+
}
197+
198+
Datum
199+
xid8eq(PG_FUNCTION_ARGS)
200+
{
201+
FullTransactionIdfxid1=PG_GETARG_FULLTRANSACTIONID(0);
202+
FullTransactionIdfxid2=PG_GETARG_FULLTRANSACTIONID(1);
203+
204+
PG_RETURN_BOOL(FullTransactionIdEquals(fxid1,fxid2));
205+
}
206+
207+
Datum
208+
xid8ne(PG_FUNCTION_ARGS)
209+
{
210+
FullTransactionIdfxid1=PG_GETARG_FULLTRANSACTIONID(0);
211+
FullTransactionIdfxid2=PG_GETARG_FULLTRANSACTIONID(1);
212+
213+
PG_RETURN_BOOL(!FullTransactionIdEquals(fxid1,fxid2));
214+
}
215+
216+
Datum
217+
xid8lt(PG_FUNCTION_ARGS)
218+
{
219+
FullTransactionIdfxid1=PG_GETARG_FULLTRANSACTIONID(0);
220+
FullTransactionIdfxid2=PG_GETARG_FULLTRANSACTIONID(1);
221+
222+
PG_RETURN_BOOL(FullTransactionIdPrecedes(fxid1,fxid2));
223+
}
224+
225+
Datum
226+
xid8gt(PG_FUNCTION_ARGS)
227+
{
228+
FullTransactionIdfxid1=PG_GETARG_FULLTRANSACTIONID(0);
229+
FullTransactionIdfxid2=PG_GETARG_FULLTRANSACTIONID(1);
230+
231+
PG_RETURN_BOOL(FullTransactionIdFollows(fxid1,fxid2));
232+
}
233+
234+
Datum
235+
xid8le(PG_FUNCTION_ARGS)
236+
{
237+
FullTransactionIdfxid1=PG_GETARG_FULLTRANSACTIONID(0);
238+
FullTransactionIdfxid2=PG_GETARG_FULLTRANSACTIONID(1);
239+
240+
PG_RETURN_BOOL(FullTransactionIdPrecedesOrEquals(fxid1,fxid2));
241+
}
242+
243+
Datum
244+
xid8ge(PG_FUNCTION_ARGS)
245+
{
246+
FullTransactionIdfxid1=PG_GETARG_FULLTRANSACTIONID(0);
247+
FullTransactionIdfxid2=PG_GETARG_FULLTRANSACTIONID(1);
248+
249+
PG_RETURN_BOOL(FullTransactionIdFollowsOrEquals(fxid1,fxid2));
250+
}
251+
252+
Datum
253+
xid8cmp(PG_FUNCTION_ARGS)
254+
{
255+
FullTransactionIdfxid1=PG_GETARG_FULLTRANSACTIONID(0);
256+
FullTransactionIdfxid2=PG_GETARG_FULLTRANSACTIONID(1);
257+
258+
if (FullTransactionIdFollows(fxid1,fxid2))
259+
PG_RETURN_INT32(1);
260+
elseif (FullTransactionIdEquals(fxid1,fxid2))
261+
PG_RETURN_INT32(0);
262+
else
263+
PG_RETURN_INT32(-1);
264+
}
265+
150266
/*****************************************************************************
151267
* COMMAND IDENTIFIER ROUTINES *
152268
*****************************************************************************/

‎src/fe_utils/print.c

Lines changed: 1 addition & 0 deletions
Original file line numberDiff line numberDiff line change
@@ -3509,6 +3509,7 @@ column_type_alignment(Oid ftype)
35093509
caseNUMERICOID:
35103510
caseOIDOID:
35113511
caseXIDOID:
3512+
caseXID8OID:
35123513
caseCIDOID:
35133514
caseCASHOID:
35143515
align='r';

‎src/include/access/transam.h

Lines changed: 14 additions & 0 deletions
Original file line numberDiff line numberDiff line change
@@ -47,7 +47,11 @@
4747
#defineEpochFromFullTransactionId(x)((uint32) ((x).value >> 32))
4848
#defineXidFromFullTransactionId(x)((uint32) (x).value)
4949
#defineU64FromFullTransactionId(x)((x).value)
50+
#defineFullTransactionIdEquals(a,b)((a).value == (b).value)
5051
#defineFullTransactionIdPrecedes(a,b)((a).value < (b).value)
52+
#defineFullTransactionIdPrecedesOrEquals(a,b) ((a).value <= (b).value)
53+
#defineFullTransactionIdFollows(a,b) ((a).value > (b).value)
54+
#defineFullTransactionIdFollowsOrEquals(a,b) ((a).value >= (b).value)
5155
#defineFullTransactionIdIsValid(x)TransactionIdIsValid(XidFromFullTransactionId(x))
5256
#defineInvalidFullTransactionIdFullTransactionIdFromEpochAndXid(0, InvalidTransactionId)
5357

@@ -71,6 +75,16 @@ FullTransactionIdFromEpochAndXid(uint32 epoch, TransactionId xid)
7175
returnresult;
7276
}
7377

78+
staticinlineFullTransactionId
79+
FullTransactionIdFromU64(uint64value)
80+
{
81+
FullTransactionIdresult;
82+
83+
result.value=value;
84+
85+
returnresult;
86+
}
87+
7488
/* advance a transaction ID variable, handling wraparound correctly */
7589
#defineTransactionIdAdvance(dest)\
7690
do { \

‎src/include/catalog/catversion.h

Lines changed: 1 addition & 1 deletion
Original file line numberDiff line numberDiff line change
@@ -53,6 +53,6 @@
5353
*/
5454

5555
/*yyyymmddN */
56-
#defineCATALOG_VERSION_NO202004022
56+
#defineCATALOG_VERSION_NO202004061
5757

5858
#endif

‎src/include/catalog/pg_amop.dat

Lines changed: 22 additions & 0 deletions
Original file line numberDiff line numberDiff line change
@@ -180,6 +180,24 @@
180180
{ amopfamily => 'btree/oid_ops', amoplefttype => 'oid', amoprighttype => 'oid',
181181
amopstrategy => '5', amopopr => '>(oid,oid)', amopmethod => 'btree' },
182182

183+
# btree xid8_ops
184+
185+
{ amopfamily => 'btree/xid8_ops', amoplefttype => 'xid8',
186+
amoprighttype => 'xid8', amopstrategy => '1', amopopr => '<(xid8,xid8)',
187+
amopmethod => 'btree' },
188+
{ amopfamily => 'btree/xid8_ops', amoplefttype => 'xid8',
189+
amoprighttype => 'xid8', amopstrategy => '2', amopopr => '<=(xid8,xid8)',
190+
amopmethod => 'btree' },
191+
{ amopfamily => 'btree/xid8_ops', amoplefttype => 'xid8',
192+
amoprighttype => 'xid8', amopstrategy => '3', amopopr => '=(xid8,xid8)',
193+
amopmethod => 'btree' },
194+
{ amopfamily => 'btree/xid8_ops', amoplefttype => 'xid8',
195+
amoprighttype => 'xid8', amopstrategy => '4', amopopr => '>=(xid8,xid8)',
196+
amopmethod => 'btree' },
197+
{ amopfamily => 'btree/xid8_ops', amoplefttype => 'xid8',
198+
amoprighttype => 'xid8', amopstrategy => '5', amopopr => '>(xid8,xid8)',
199+
amopmethod => 'btree' },
200+
183201
# btree tid_ops
184202

185203
{ amopfamily => 'btree/tid_ops', amoplefttype => 'tid', amoprighttype => 'tid',
@@ -1009,6 +1027,10 @@
10091027
{ amopfamily => 'hash/xid_ops', amoplefttype => 'xid', amoprighttype => 'xid',
10101028
amopstrategy => '1', amopopr => '=(xid,xid)', amopmethod => 'hash' },
10111029

1030+
# xid8_ops
1031+
{ amopfamily => 'hash/xid8_ops', amoplefttype => 'xid8', amoprighttype => 'xid8',
1032+
amopstrategy => '1', amopopr => '=(xid8,xid8)', amopmethod => 'hash' },
1033+
10121034
# cid_ops
10131035
{ amopfamily => 'hash/cid_ops', amoplefttype => 'cid', amoprighttype => 'cid',
10141036
amopstrategy => '1', amopopr => '=(cid,cid)', amopmethod => 'hash' },

‎src/include/catalog/pg_amproc.dat

Lines changed: 8 additions & 0 deletions
Original file line numberDiff line numberDiff line change
@@ -287,6 +287,10 @@
287287
amprocrighttype => 'anyrange', amprocnum => '1', amproc => 'range_cmp' },
288288
{ amprocfamily => 'btree/jsonb_ops', amproclefttype => 'jsonb',
289289
amprocrighttype => 'jsonb', amprocnum => '1', amproc => 'jsonb_cmp' },
290+
{ amprocfamily => 'btree/xid8_ops', amproclefttype => 'xid8',
291+
amprocrighttype => 'xid8', amprocnum => '1', amproc => 'xid8cmp' },
292+
{ amprocfamily => 'btree/xid8_ops', amproclefttype => 'xid8',
293+
amprocrighttype => 'xid8', amprocnum => '4', amproc => 'btequalimage' },
290294

291295
# hash
292296
{ amprocfamily => 'hash/bpchar_ops', amproclefttype => 'bpchar',
@@ -399,6 +403,10 @@
399403
amprocrighttype => 'xid', amprocnum => '1', amproc => 'hashint4' },
400404
{ amprocfamily => 'hash/xid_ops', amproclefttype => 'xid',
401405
amprocrighttype => 'xid', amprocnum => '2', amproc => 'hashint4extended' },
406+
{ amprocfamily => 'hash/xid8_ops', amproclefttype => 'xid8',
407+
amprocrighttype => 'xid8', amprocnum => '1', amproc => 'hashint8' },
408+
{ amprocfamily => 'hash/xid8_ops', amproclefttype => 'xid8',
409+
amprocrighttype => 'xid8', amprocnum => '2', amproc => 'hashint8extended' },
402410
{ amprocfamily => 'hash/cid_ops', amproclefttype => 'cid',
403411
amprocrighttype => 'cid', amprocnum => '1', amproc => 'hashint4' },
404412
{ amprocfamily => 'hash/cid_ops', amproclefttype => 'cid',

‎src/include/catalog/pg_cast.dat

Lines changed: 4 additions & 0 deletions
Original file line numberDiff line numberDiff line change
@@ -93,6 +93,10 @@
9393
{ castsource => 'bool', casttarget => 'int4', castfunc => 'int4(bool)',
9494
castcontext => 'e', castmethod => 'f' },
9595

96+
# Allow explicit coercions between xid8 and xid
97+
{ castsource => 'xid8', casttarget => 'xid', castfunc => 'xid(xid8)',
98+
castcontext => 'e', castmethod => 'f' },
99+
96100
# OID category: allow implicit conversion from any integral type (including
97101
# int8, to support OID literals > 2G) to OID, as well as assignment coercion
98102
# from OID to int4 or int8. Similarly for each OID-alias type. Also allow

‎src/include/catalog/pg_opclass.dat

Lines changed: 4 additions & 0 deletions
Original file line numberDiff line numberDiff line change
@@ -168,6 +168,10 @@
168168
opcintype => 'tid' },
169169
{ opcmethod => 'hash', opcname => 'xid_ops', opcfamily => 'hash/xid_ops',
170170
opcintype => 'xid' },
171+
{ opcmethod => 'hash', opcname => 'xid8_ops', opcfamily => 'hash/xid8_ops',
172+
opcintype => 'xid8' },
173+
{ opcmethod => 'btree', opcname => 'xid8_ops', opcfamily => 'btree/xid8_ops',
174+
opcintype => 'xid8' },
171175
{ opcmethod => 'hash', opcname => 'cid_ops', opcfamily => 'hash/cid_ops',
172176
opcintype => 'cid' },
173177
{ opcmethod => 'hash', opcname => 'tid_ops', opcfamily => 'hash/tid_ops',

‎src/include/catalog/pg_operator.dat

Lines changed: 25 additions & 0 deletions
Original file line numberDiff line numberDiff line change
@@ -193,6 +193,31 @@
193193
oprname => '<>', oprleft => 'xid', oprright => 'int4', oprresult => 'bool',
194194
oprnegate => '=(xid,int4)', oprcode => 'xidneqint4', oprrest => 'neqsel',
195195
oprjoin => 'neqjoinsel' },
196+
{ oid => '9418', descr => 'equal',
197+
oprname => '=', oprcanmerge => 't', oprcanhash => 't', oprleft => 'xid8',
198+
oprright => 'xid8', oprresult => 'bool', oprcom => '=(xid8,xid8)',
199+
oprnegate => '<>(xid8,xid8)', oprcode => 'xid8eq', oprrest => 'eqsel',
200+
oprjoin => 'eqjoinsel' },
201+
{ oid => '9422', descr => 'not equal',
202+
oprname => '<>', oprleft => 'xid8', oprright => 'xid8',
203+
oprresult => 'bool', oprcom => '<>(xid8,xid8)', oprnegate => '=(xid8,xid8)',
204+
oprcode => 'xid8ne', oprrest => 'neqsel', oprjoin => 'neqjoinsel' },
205+
{ oid => '9432', descr => 'less than',
206+
oprname => '<', oprleft => 'xid8', oprright => 'xid8', oprresult => 'bool',
207+
oprcom => '>(xid8,xid8)', oprnegate => '>=(xid8,xid8)', oprcode => 'xid8lt',
208+
oprrest => 'scalarltsel', oprjoin => 'scalarltjoinsel' },
209+
{ oid => '9433', descr => 'greater than',
210+
oprname => '>', oprleft => 'xid8', oprright => 'xid8', oprresult => 'bool',
211+
oprcom => '<(xid8,xid8)', oprnegate => '<=(xid8,xid8)', oprcode => 'xid8gt',
212+
oprrest => 'scalargtsel', oprjoin => 'scalargtjoinsel' },
213+
{ oid => '9434', descr => 'less than or equal',
214+
oprname => '<=', oprleft => 'xid8', oprright => 'xid8', oprresult => 'bool',
215+
oprcom => '>=(xid8,xid8)', oprnegate => '>(xid8,xid8)', oprcode => 'xid8le',
216+
oprrest => 'scalarlesel', oprjoin => 'scalarlejoinsel' },
217+
{ oid => '9435', descr => 'greater than or equal',
218+
oprname => '>=', oprleft => 'xid8', oprright => 'xid8', oprresult => 'bool',
219+
oprcom => '<=(xid8,xid8)', oprnegate => '<(xid8,xid8)', oprcode => 'xid8ge',
220+
oprrest => 'scalargesel', oprjoin => 'scalargejoinsel' },
196221
{ oid => '388', descr => 'factorial',
197222
oprname => '!', oprkind => 'r', oprleft => 'int8', oprright => '0',
198223
oprresult => 'numeric', oprcode => 'numeric_fac' },

‎src/include/catalog/pg_opfamily.dat

Lines changed: 4 additions & 0 deletions
Original file line numberDiff line numberDiff line change
@@ -110,6 +110,10 @@
110110
opfmethod => 'btree', opfname => 'tid_ops' },
111111
{ oid => '2225',
112112
opfmethod => 'hash', opfname => 'xid_ops' },
113+
{ oid => '8164',
114+
opfmethod => 'hash', opfname => 'xid8_ops' },
115+
{ oid => '9322',
116+
opfmethod => 'btree', opfname => 'xid8_ops' },
113117
{ oid => '2226',
114118
opfmethod => 'hash', opfname => 'cid_ops' },
115119
{ oid => '2227',

‎src/include/catalog/pg_proc.dat

Lines changed: 36 additions & 0 deletions
Original file line numberDiff line numberDiff line change
@@ -112,6 +112,18 @@
112112
{ oid => '51', descr => 'I/O',
113113
proname => 'xidout', prorettype => 'cstring', proargtypes => 'xid',
114114
prosrc => 'xidout' },
115+
{ oid => '9420', descr => 'I/O',
116+
proname => 'xid8in', prorettype => 'xid8', proargtypes => 'cstring',
117+
prosrc => 'xid8in' },
118+
{ oid => '9554', descr => 'I/O',
119+
proname => 'xid8out', prorettype => 'cstring', proargtypes => 'xid8',
120+
prosrc => 'xid8out' },
121+
{ oid => '9555', descr => 'I/O',
122+
proname => 'xid8recv', prorettype => 'xid8', proargtypes => 'internal',
123+
prosrc => 'xid8recv' },
124+
{ oid => '9556', descr => 'I/O',
125+
proname => 'xid8send', prorettype => 'bytea', proargtypes => 'xid8',
126+
prosrc => 'xid8send' },
115127
{ oid => '52', descr => 'I/O',
116128
proname => 'cidin', prorettype => 'cid', proargtypes => 'cstring',
117129
prosrc => 'cidin' },
@@ -163,6 +175,30 @@
163175
{ oid => '3308',
164176
proname => 'xidneq', proleakproof => 't', prorettype => 'bool',
165177
proargtypes => 'xid xid', prosrc => 'xidneq' },
178+
{ oid => '9557',
179+
proname => 'xid8eq', proleakproof => 't', prorettype => 'bool',
180+
proargtypes => 'xid8 xid8', prosrc => 'xid8eq' },
181+
{ oid => '9558',
182+
proname => 'xid8ne', proleakproof => 't', prorettype => 'bool',
183+
proargtypes => 'xid8 xid8', prosrc => 'xid8ne' },
184+
{ oid => '8295',
185+
proname => 'xid8lt', proleakproof => 't', prorettype => 'bool',
186+
proargtypes => 'xid8 xid8', prosrc => 'xid8lt' },
187+
{ oid => '8296',
188+
proname => 'xid8gt', proleakproof => 't', prorettype => 'bool',
189+
proargtypes => 'xid8 xid8', prosrc => 'xid8gt' },
190+
{ oid => '8297',
191+
proname => 'xid8le', proleakproof => 't', prorettype => 'bool',
192+
proargtypes => 'xid8 xid8', prosrc => 'xid8le' },
193+
{ oid => '8298',
194+
proname => 'xid8ge', proleakproof => 't', prorettype => 'bool',
195+
proargtypes => 'xid8 xid8', prosrc => 'xid8ge' },
196+
{ oid => '9912', descr => 'less-equal-greater',
197+
proname => 'xid8cmp', proleakproof => 't', prorettype => 'int4',
198+
proargtypes => 'xid8 xid8', prosrc => 'xid8cmp' },
199+
{ oid => '9421', descr => 'convert xid8 to xid',
200+
proname => 'xid', prorettype => 'xid', proargtypes => 'xid8',
201+
prosrc => 'xid8toxid' },
166202
{ oid => '69',
167203
proname => 'cideq', proleakproof => 't', prorettype => 'bool',
168204
proargtypes => 'cid cid', prosrc => 'cideq' },

‎src/include/catalog/pg_type.dat

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@@ -177,6 +177,10 @@
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typtype => 'p', typcategory => 'P', typinput => 'pg_ddl_command_in',
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typoutput => 'pg_ddl_command_out', typreceive => 'pg_ddl_command_recv',
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typsend => 'pg_ddl_command_send', typalign => 'ALIGNOF_POINTER' },
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{ oid => '9419', array_type_oid => '271', descr => 'full transaction id',
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typname => 'xid8', typlen => '8', typbyval => 'FLOAT8PASSBYVAL',
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typcategory => 'U', typinput => 'xid8in', typoutput => 'xid8out',
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typreceive => 'xid8recv', typsend => 'xid8send', typalign => 'd' },
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# OIDS 600 - 699
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