database/postgres
1
0
Fork 0
mirror of https://github.com/postgres/postgres.git synced 2025-09-02 04:21:28 +03:00
Code Activity

Fix the misuse of origin filter across multiple pg_logical_slot_get_changes() calls.

Browse Source 
The pgoutput module uses a global variable (publish_no_origin) to cache
the action for the origin filter, but we didn't reset the flag when
shutting down the output plugin, so subsequent retries may access the
previous publish_no_origin value.

We fix this by storing the flag in the output plugin's private data.
Additionally, the patch removes the currently unused origin string from the
structure.

For the back branch, to avoid changing the exposed structure, we eliminated the
global variable and instead directly used the origin string for change
filtering.

Author: Hou Zhijie
Reviewed-by: Amit Kapila, Michael Paquier
Backpatch-through: 16
Discussion: http://postgr.es/m/OS0PR01MB571690EF24F51F51EFFCBB0E94FAA@OS0PR01MB5716.jpnprd01.prod.outlook.com
This commit is contained in:
Amit Kapila
2023-09-27 14:20:57 +05:30
parent 641db601b7
commit 8d05be9319
3 changed files with 85 additions and 7 deletions
Download Patch File Download Diff File Expand all files Collapse all files

14
src/backend/replication/pgoutput/pgoutput.c
View File

@@ -82,7 +82,6 @@ static void pgoutput_stream_prepare_txn(LogicalDecodingContext *ctx,
static bool publications_valid;
static bool in_streaming;
static bool publish_no_origin;
static List *LoadPublications(List *pubnames);
static void publication_invalidation_cb(Datum arg, int cacheid,
@@ -388,11 +387,9 @@ parse_output_parameters(List *options, PGOutputData *data)
origin_option_given = true;
data->origin = defGetString(defel);
if (pg_strcasecmp(data->origin, LOGICALREP_ORIGIN_NONE) == 0)
publish_no_origin = true;
else if (pg_strcasecmp(data->origin, LOGICALREP_ORIGIN_ANY) == 0)
publish_no_origin = false;
else
if (pg_strcasecmp(data->origin, LOGICALREP_ORIGIN_NONE) != 0 &&
pg_strcasecmp(data->origin, LOGICALREP_ORIGIN_ANY) != 0)
ereport(ERROR,
errcode(ERRCODE_INVALID_PARAMETER_VALUE),
errmsg("unrecognized origin value: \"%s\"", data->origin));
@@ -1673,7 +1670,10 @@ static bool
pgoutput_origin_filter(LogicalDecodingContext *ctx,
RepOriginId origin_id)
{
if (publish_no_origin && origin_id != InvalidRepOriginId)
PGOutputData *data = (PGOutputData *) ctx->output_plugin_private;
if (data->origin && (pg_strcasecmp(data->origin, LOGICALREP_ORIGIN_NONE) == 0) &&
origin_id != InvalidRepOriginId)
return true;
return false;