Raise an ERROR instead of causing a crash when backend data is not init #7806
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DESCRIPTION: Avoids a crash that could happen if another extension breaks auth-hook chain.
Bug 3697586: Server crashes when assigning distributed transaction
There is a bug in the Azure extension's auth hook not calling the Citus auth hook (which we already fixed), which caused the uninitialized
MyBackendData
. However, we should add this check in AssignDistributedTransactionId as an extra protection to prevent crashing with a segmentation fault (SEGV).We already have such checks in
assign_distributed_transaction_id