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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
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14
src/include/access/transam.h
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@@ -47,7 +47,11 @@
#define EpochFromFullTransactionId(x) ((uint32) ((x).value >> 32))
#define XidFromFullTransactionId(x) ((uint32) (x).value)
#define U64FromFullTransactionId(x) ((x).value)
#define FullTransactionIdEquals(a, b) ((a).value == (b).value)
#define FullTransactionIdPrecedes(a, b) ((a).value < (b).value)
#define FullTransactionIdPrecedesOrEquals(a, b) ((a).value <= (b).value)
#define FullTransactionIdFollows(a, b) ((a).value > (b).value)
#define FullTransactionIdFollowsOrEquals(a, b) ((a).value >= (b).value)
#define FullTransactionIdIsValid(x) TransactionIdIsValid(XidFromFullTransactionId(x))
#define InvalidFullTransactionId FullTransactionIdFromEpochAndXid(0, InvalidTransactionId)
@@ -71,6 +75,16 @@ FullTransactionIdFromEpochAndXid(uint32 epoch, TransactionId xid)
return result;
}
static inline FullTransactionId
FullTransactionIdFromU64(uint64 value)
{
FullTransactionId result;
result.value = value;
return result;
}
/* advance a transaction ID variable, handling wraparound correctly */
#define TransactionIdAdvance(dest) \
do { \