Importance

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Abstract

Implementations of the present disclosure include methods, systems, and computer-readable storage mediums for receiving a query, retrieving an annotated query execution plan (QEP) that is associated with the query, the annotated QEP including a plurality of operators in respective lines, which are executed to provide a query result, at least one line having annotations for check-pointing an intermediate result provided by a respective operator, and determining that a power failure occurred during execution of the annotated QEP in an in-memory database system, and in response: determining that a checkpoint for the at least one line is stored in non-volatile memory (NVM), retrieving the intermediate result provided by the respective operator from the NVM, and restarting execution of the annotated QEP using the intermediate result as input to an operator provided in a line following the at least one line.

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First Claim