fix(postgresql): trying to fix relcache/plancache/snapshot leaks that occurs when an exception is thrown and catched inside cloudsync_changes_insert_trigger (WIP)

Author: andinux

src/postgresql/cloudsync_postgresql.c

@@ -1712,8 +1712,10 @@ Datum cloudsync_col_value(PG_FUNCTION_ARGS) {
     }
 
     if (rc != DBRES_OK) {
+        databasevm_reset(vm);
         ereport(ERROR, (errmsg("cloudsync_col_value error: %s", cloudsync_errmsg(data))));
     }
+    databasevm_reset(vm);
     PG_RETURN_DATUM(d);
 }
 

src/postgresql/database_postgresql.c

@@ -1479,6 +1479,10 @@ void databasevm_finalize (dbvm_t *vm) {
 
 void databasevm_reset (dbvm_t *vm) {
     if (!vm) return;
+    pg_stmt_t *stmt = (pg_stmt_t*)vm;
+    clear_fetch_batch(stmt);
+    close_portal(stmt);
+    stmt->executed_nonselect = false;
     databasevm_clear_bindings(vm);
 }