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Diffstat (limited to 'src/backend/storage/lmgr/predicate.c')
| -rw-r--r-- | src/backend/storage/lmgr/predicate.c | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/src/backend/storage/lmgr/predicate.c b/src/backend/storage/lmgr/predicate.c index 0c3c7f089bf..5e83ac354ff 100644 --- a/src/backend/storage/lmgr/predicate.c +++ b/src/backend/storage/lmgr/predicate.c @@ -1571,6 +1571,19 @@ GetSerializableTransactionSnapshot(Snapshot snapshot) Assert(IsolationIsSerializable()); /* + * Can't use serializable mode while recovery is still active, as it is, + * for example, on a hot standby. We could get here despite the check + * in check_XactIsoLevel() if default_transaction_isolation is set to + * serializable, so phrase the hint accordingly. + */ + if (RecoveryInProgress()) + ereport(ERROR, + (errcode(ERRCODE_FEATURE_NOT_SUPPORTED), + errmsg("cannot use serializable mode in a hot standby"), + errdetail("\"default_transaction_isolation\" is set to \"serializable\"."), + errhint("You can use \"SET default_transaction_isolation = 'repeatable read'\" to change the default."))); + + /* * A special optimization is available for SERIALIZABLE READ ONLY * DEFERRABLE transactions -- we can wait for a suitable snapshot and * thereby avoid all SSI overhead once it's running. |