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Store 2PC GID in commit/abort WAL recs for logical decoding

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Store GID of 2PC in commit/abort WAL records when wal_level = logical.
This allows logical decoding to send the SAME gid to subscribers
across restarts of logical replication.

Track relica origin replay progress for 2PC.

(Edited from patch 0003 in the logical decoding 2PC series.)

Authors: Nikhil Sontakke, Stas Kelvich
Reviewed-by: Simon Riggs, Andres Freund
This commit is contained in:
Simon Riggs
2018-03-28 17:42:50 +01:00
parent 75e95dd79b
commit 1eb6d6527a
5 changed files with 230 additions and 24 deletions
Download Patch File Download Diff File Expand all files Collapse all files

39
src/backend/access/rmgrdesc/xactdesc.c
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@@ -102,6 +102,14 @@ ParseCommitRecord(uint8 info, xl_xact_commit *xlrec, xl_xact_parsed_commit *pars
parsed->twophase_xid = xl_twophase->xid;
data += sizeof(xl_xact_twophase);
if (parsed->xinfo & XACT_XINFO_HAS_GID)
{
int gidlen;
strcpy(parsed->twophase_gid, data);
gidlen = strlen(parsed->twophase_gid) + 1;
data += MAXALIGN(gidlen);
}
}
if (parsed->xinfo & XACT_XINFO_HAS_ORIGIN)
@@ -139,6 +147,16 @@ ParseAbortRecord(uint8 info, xl_xact_abort *xlrec, xl_xact_parsed_abort *parsed)
data += sizeof(xl_xact_xinfo);
}
if (parsed->xinfo & XACT_XINFO_HAS_DBINFO)
{
xl_xact_dbinfo *xl_dbinfo = (xl_xact_dbinfo *) data;
parsed->dbId = xl_dbinfo->dbId;
parsed->tsId = xl_dbinfo->tsId;
data += sizeof(xl_xact_dbinfo);
}
if (parsed->xinfo & XACT_XINFO_HAS_SUBXACTS)
{
xl_xact_subxacts *xl_subxacts = (xl_xact_subxacts *) data;
@@ -168,6 +186,27 @@ ParseAbortRecord(uint8 info, xl_xact_abort *xlrec, xl_xact_parsed_abort *parsed)
parsed->twophase_xid = xl_twophase->xid;
data += sizeof(xl_xact_twophase);
if (parsed->xinfo & XACT_XINFO_HAS_GID)
{
int gidlen;
strcpy(parsed->twophase_gid, data);
gidlen = strlen(parsed->twophase_gid) + 1;
data += MAXALIGN(gidlen);
}
}
if (parsed->xinfo & XACT_XINFO_HAS_ORIGIN)
{
xl_xact_origin xl_origin;
/* we're only guaranteed 4 byte alignment, so copy onto stack */
memcpy(&xl_origin, data, sizeof(xl_origin));
parsed->origin_lsn = xl_origin.origin_lsn;
parsed->origin_timestamp = xl_origin.origin_timestamp;
data += sizeof(xl_xact_origin);
}
}