Abstract: In a general aspect, injecting synthetic anomalies into data is described. In some embodiments, a system identifies a base data set stored in a remote database system and a set of synthetic anomaly injection operations to apply to portions of the base data set. The system submits a set of instructions that are configured to cause the remote database system to perform operations including: creating one or more entries in a lookup table and rerouting received queries attempting to access the one or more portions of the base data set to instead access modified base data while the one or more entries are active. The system causes the remote database system to inactivate the one or more entries in the lookup table such that the remote database system ceases rerouting received queries.

Abstract: In a general aspect, benchmarking for data quality monitoring is described. In some embodiments, a system identifies a base data set to be used as input to a machine learning (ML) model. The system generates a modified base data set by causing synthetic anomaly injection operations to be performed on data of the base data set. The system causes the ML model to run, using the base data set as input, to determine a first output of the ML model, and to run, using the modified base data set as input, to determine a second output of the ML model. The system determines a set of performance metrics representing performance of the ML model at detecting data anomalies and outputs a representation of the set of performance metrics.

Abstract: In a general aspect, injecting synthetic anomalies into data is described. In some embodiments, a system identifies a base data set stored in a remote database system and a set of synthetic anomaly injection operations to apply to portions of the base data set. The system submits a set of instructions that are configured to cause the remote database system to perform operations including: creating one or more entries in a lookup table and rerouting received queries attempting to access the one or more portions of the base data set to instead access modified base data while the one or more entries are active. The system causes the remote database system to inactivate the one or more entries in the lookup table such that the remote database system ceases rerouting received queries.