diff options
Diffstat (limited to 'src/backend/replication/logical')
| -rw-r--r-- | src/backend/replication/logical/tablesync.c | 25 |
1 files changed, 21 insertions, 4 deletions
diff --git a/src/backend/replication/logical/tablesync.c b/src/backend/replication/logical/tablesync.c index c3dd902..e6159ac 100644 --- a/src/backend/replication/logical/tablesync.c +++ b/src/backend/replication/logical/tablesync.c @@ -120,7 +120,14 @@ #include "utils/snapmgr.h" #include "utils/syscache.h" -static bool table_states_valid = false; +typedef enum +{ + SYNC_TABLE_STATE_NEEDS_REBUILD, + SYNC_TABLE_STATE_REBUILD_STARTED, + SYNC_TABLE_STATE_VALID, +} SyncingTablesState; + +static SyncingTablesState table_states_validity = SYNC_TABLE_STATE_NEEDS_REBUILD; static List *table_states_not_ready = NIL; static bool FetchTableStates(bool *started_tx); @@ -270,7 +277,7 @@ wait_for_worker_state_change(char expected_state) void invalidate_syncing_table_states(Datum arg, int cacheid, uint32 hashvalue) { - table_states_valid = false; + table_states_validity = SYNC_TABLE_STATE_NEEDS_REBUILD; } /* @@ -1465,13 +1472,15 @@ FetchTableStates(bool *started_tx) *started_tx = false; - if (!table_states_valid) + if (table_states_validity != SYNC_TABLE_STATE_VALID) { MemoryContext oldctx; List *rstates; ListCell *lc; SubscriptionRelState *rstate; + table_states_validity = SYNC_TABLE_STATE_REBUILD_STARTED; + /* Clean the old lists. */ list_free_deep(table_states_not_ready); table_states_not_ready = NIL; @@ -1505,7 +1514,15 @@ FetchTableStates(bool *started_tx) has_subrels = (list_length(table_states_not_ready) > 0) || HasSubscriptionRelations(MySubscription->oid); - table_states_valid = true; + /* + * If the subscription relation cache has been invalidated since we + * entered this routine, we still use and return the relations we just + * finished constructing, to avoid infinite loops, but we leave the + * table states marked as stale so that we'll rebuild it again on next + * access. Otherwise, we mark the table states as valid. + */ + if (table_states_validity == SYNC_TABLE_STATE_REBUILD_STARTED) + table_states_validity = SYNC_TABLE_STATE_VALID; } return has_subrels; |