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Add SQL type xid8 to expose FullTransactionId to users.

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Similar to xid, but 64 bits wide.  This new type is suitable for use in
various 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
This commit is contained in:
Thomas Munro
2020-04-07 11:08:14 +12:00
parent 4bea576b03
commit aeec457de8
20 changed files with 464 additions and 2 deletions
Download Patch File Download Diff File Expand all files Collapse all files

3
src/backend/access/hash/hashvalidate.c
View File

@ -317,6 +317,9 @@ check_hash_func_signature(Oid funcid, int16 amprocnum, Oid argtype)
(argtype == DATEOID ||
argtype == XIDOID || argtype == CIDOID))
/* okay, allowed use of hashint4() */ ;
else if ((funcid == F_HASHINT8 || funcid == F_HASHINT8EXTENDED) &&
(argtype == XID8OID))
/* okay, allowed use of hashint8() */ ;
else if ((funcid == F_TIMESTAMP_HASH ||
funcid == F_TIMESTAMP_HASH_EXTENDED) &&
argtype == TIMESTAMPTZOID)

116
src/backend/utils/adt/xid.c
View File

@ -21,6 +21,7 @@
#include "access/xact.h"
#include "libpq/pqformat.h"
#include "utils/builtins.h"
#include "utils/xid8.h"
#define PG_GETARG_TRANSACTIONID(n) DatumGetTransactionId(PG_GETARG_DATUM(n))
#define PG_RETURN_TRANSACTIONID(x) return TransactionIdGetDatum(x)
@ -147,6 +148,121 @@ xidComparator(const void *arg1, const void *arg2)
return 0;
}
Datum
xid8toxid(PG_FUNCTION_ARGS)
{
FullTransactionId fxid = PG_GETARG_FULLTRANSACTIONID(0);
PG_RETURN_TRANSACTIONID(XidFromFullTransactionId(fxid));
}
Datum
xid8in(PG_FUNCTION_ARGS)
{
char *str = PG_GETARG_CSTRING(0);
PG_RETURN_FULLTRANSACTIONID(FullTransactionIdFromU64(pg_strtouint64(str, NULL, 0)));
}
Datum
xid8out(PG_FUNCTION_ARGS)
{
FullTransactionId fxid = PG_GETARG_FULLTRANSACTIONID(0);
char *result = (char *) palloc(21);
snprintf(result, 21, UINT64_FORMAT, U64FromFullTransactionId(fxid));
PG_RETURN_CSTRING(result);
}
Datum
xid8recv(PG_FUNCTION_ARGS)
{
StringInfo buf = (StringInfo) PG_GETARG_POINTER(0);
uint64 value;
value = (uint64) pq_getmsgint64(buf);
PG_RETURN_FULLTRANSACTIONID(FullTransactionIdFromU64(value));
}
Datum
xid8send(PG_FUNCTION_ARGS)
{
FullTransactionId arg1 = PG_GETARG_FULLTRANSACTIONID(0);
StringInfoData buf;
pq_begintypsend(&buf);
pq_sendint64(&buf, (uint64) U64FromFullTransactionId(arg1));
PG_RETURN_BYTEA_P(pq_endtypsend(&buf));
}
Datum
xid8eq(PG_FUNCTION_ARGS)
{
FullTransactionId fxid1 = PG_GETARG_FULLTRANSACTIONID(0);
FullTransactionId fxid2 = PG_GETARG_FULLTRANSACTIONID(1);
PG_RETURN_BOOL(FullTransactionIdEquals(fxid1, fxid2));
}
Datum
xid8ne(PG_FUNCTION_ARGS)
{
FullTransactionId fxid1 = PG_GETARG_FULLTRANSACTIONID(0);
FullTransactionId fxid2 = PG_GETARG_FULLTRANSACTIONID(1);
PG_RETURN_BOOL(!FullTransactionIdEquals(fxid1, fxid2));
}
Datum
xid8lt(PG_FUNCTION_ARGS)
{
FullTransactionId fxid1 = PG_GETARG_FULLTRANSACTIONID(0);
FullTransactionId fxid2 = PG_GETARG_FULLTRANSACTIONID(1);
PG_RETURN_BOOL(FullTransactionIdPrecedes(fxid1, fxid2));
}
Datum
xid8gt(PG_FUNCTION_ARGS)
{
FullTransactionId fxid1 = PG_GETARG_FULLTRANSACTIONID(0);
FullTransactionId fxid2 = PG_GETARG_FULLTRANSACTIONID(1);
PG_RETURN_BOOL(FullTransactionIdFollows(fxid1, fxid2));
}
Datum
xid8le(PG_FUNCTION_ARGS)
{
FullTransactionId fxid1 = PG_GETARG_FULLTRANSACTIONID(0);
FullTransactionId fxid2 = PG_GETARG_FULLTRANSACTIONID(1);
PG_RETURN_BOOL(FullTransactionIdPrecedesOrEquals(fxid1, fxid2));
}
Datum
xid8ge(PG_FUNCTION_ARGS)
{
FullTransactionId fxid1 = PG_GETARG_FULLTRANSACTIONID(0);
FullTransactionId fxid2 = PG_GETARG_FULLTRANSACTIONID(1);
PG_RETURN_BOOL(FullTransactionIdFollowsOrEquals(fxid1, fxid2));
}
Datum
xid8cmp(PG_FUNCTION_ARGS)
{
FullTransactionId fxid1 = PG_GETARG_FULLTRANSACTIONID(0);
FullTransactionId fxid2 = PG_GETARG_FULLTRANSACTIONID(1);
if (FullTransactionIdFollows(fxid1, fxid2))
PG_RETURN_INT32(1);
else if (FullTransactionIdEquals(fxid1, fxid2))
PG_RETURN_INT32(0);
else
PG_RETURN_INT32(-1);
}
/*****************************************************************************
* COMMAND IDENTIFIER ROUTINES *
*****************************************************************************/