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mppdb_decoding逻辑复制槽解码添加truncate table事务信息

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This commit is contained in:
blig
2024-08-14 10:50:43 +08:00
parent 7e3717c011
commit 41027ffdd7
3 changed files with 89 additions and 1 deletions
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52
contrib/mppdb_decoding/mppdb_decoding.cpp
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@ -63,7 +63,8 @@ static void pg_output_begin(
static void pg_decode_commit_txn(LogicalDecodingContext* ctx, ReorderBufferTXN* txn, XLogRecPtr commit_lsn);
static void pg_decode_abort_txn(LogicalDecodingContext* ctx, ReorderBufferTXN* txn);
static void pg_decode_prepare_txn(LogicalDecodingContext* ctx, ReorderBufferTXN* txn);
static void pg_decode_truncate(LogicalDecodingContext *ctx, ReorderBufferTXN *txn,
int nrelations, Relation relations[], ReorderBufferChange *change);
static void pg_decode_change(
LogicalDecodingContext* ctx, ReorderBufferTXN* txn, Relation rel, ReorderBufferChange* change);
static bool pg_decode_filter(LogicalDecodingContext* ctx, RepOriginId origin_id);
@ -86,6 +87,7 @@ void _PG_output_plugin_init(OutputPluginCallbacks* cb)
cb->startup_cb = pg_decode_startup;
cb->begin_cb = pg_decode_begin_txn;
cb->change_cb = pg_decode_change;
cb->truncate_cb = pg_decode_truncate;
cb->commit_cb = pg_decode_commit_txn;
cb->abort_cb = pg_decode_abort_txn;
cb->prepare_cb = pg_decode_prepare_txn;
@ -312,6 +314,54 @@ static void TupleToJsoninfo(Relation relation, cJSON* cols_name, cJSON* cols_typ
}
}
static void pg_decode_truncate(LogicalDecodingContext *ctx, ReorderBufferTXN *txn,
int nrelations, Relation relations[], ReorderBufferChange *change)
{
PluginTestDecodingData *data;
MemoryContext old;
int i;
data = (PluginTestDecodingData*)ctx->output_plugin_private;
/* output BEGIN if we haven't yet */
if (data->skip_empty_xacts && !data->xact_wrote_changes) {
pg_output_begin(ctx, data, txn, false);
}
data->xact_wrote_changes = true;
/* Avoid leaking memory by using and resetting our own context */
old = MemoryContextSwitchTo(data->context);
OutputPluginPrepareWrite(ctx, true);
appendStringInfoString(ctx->out, "table ");
for (i = 0; i < nrelations; i++) {
if (i > 0)
appendStringInfoString(ctx->out, ", ");
appendStringInfoString(ctx->out,
quote_qualified_identifier(get_namespace_name(relations[i]->rd_rel->relnamespace),
NameStr(relations[i]->rd_rel->relname)));
}
appendStringInfoString(ctx->out, ": TRUNCATE:");
if (change->data.truncate.restart_seqs
|| change->data.truncate.cascade) {
if (change->data.truncate.restart_seqs)
appendStringInfo(ctx->out, " restart_seqs");
if (change->data.truncate.cascade)
appendStringInfo(ctx->out, " cascade");
} else
appendStringInfoString(ctx->out, " (no-flags)");
MemoryContextSwitchTo(old);
MemoryContextReset(data->context);
OutputPluginWrite(ctx, true);
}
/*
* callback for individual changed tuples
*/