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Custom WAL Resource Managers.

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Allow extensions to specify a new custom resource manager (rmgr),
which allows specialized WAL. This is meant to be used by a Table
Access Method or Index Access Method.

Prior to this commit, only Generic WAL was available, which offers
support for recovery and physical replication but not logical
replication.

Reviewed-by: Julien Rouhaud, Bharath Rupireddy, Andres Freund
Discussion: https://postgr.es/m/ed1fb2e22d15d3563ae0eb610f7b61bb15999c0a.camel%40j-davis.com
This commit is contained in:
Jeff Davis
2022-04-06 22:26:43 -07:00
parent a8cfb0c1a9
commit 5c279a6d35
24 changed files with 526 additions and 70 deletions
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8
src/backend/replication/logical/decode.c
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@ -94,7 +94,7 @@ LogicalDecodingProcessRecord(LogicalDecodingContext *ctx, XLogReaderState *recor
{
XLogRecordBuffer buf;
TransactionId txid;
RmgrId rmid;
RmgrData rmgr;
buf.origptr = ctx->reader->ReadRecPtr;
buf.endptr = ctx->reader->EndRecPtr;
@ -115,10 +115,10 @@ LogicalDecodingProcessRecord(LogicalDecodingContext *ctx, XLogReaderState *recor
buf.origptr);
}
rmid = XLogRecGetRmid(record);
rmgr = GetRmgr(XLogRecGetRmid(record));
if (RmgrTable[rmid].rm_decode != NULL)
RmgrTable[rmid].rm_decode(ctx, &buf);
if (rmgr.rm_decode != NULL)
rmgr.rm_decode(ctx, &buf);
else
{
/* just deal with xid, and done */