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This PR changes the storage interface. To avoid copying ObjectReader::read now takes a pointer to a std::vector<char> as destination. Because this vector can transparently be cleared this allows us to fix a previous error, where we mixed up actual data and error messages from the SDK. Also, since in almost all use-cases the data from ::read is written to an vector, this simplifies using the storage classes. Tests are adapted accordingly. Co-authored-by: Thomas Bodner <thomas.bodner@hpi.de>
This PR defines container classes to define SQL PRIMARY KEY and UNIQUEconstraints for certain column ids. Key constraints can be used by future Optimizer rules for pruning or group-by reduction purposes. Also, they can be used to derive functional dependencies. Co-authored-by: Julian Menzler <Julian.Menzler@vm-skyrise-ap1.eaalab.hpi.uni-potsdam.de> Co-authored-by: Thomas Bodner <thomas.bodner@hpi.de>
…ion (#737) Adds a configuration file image.conf which contains the variables IMAGE_DATE and PREFIX. All Docker Bash scripts should source it, so that they use the same, most recent image version. After this PR, the Docker image version must only be updated in the image.conf configuration file. Co-authored-by: Thomas Bodner <thomas.bodner@hpi.de>
- orc projection pushdown - parallel reads of objects - enable multi bucket reads - add etag check - remove `ChunkReader` as this logic is now implemented directly in the `ImportOperator`
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ToDos
In some cases, we want to reduce the object count for certain pipeline stages. This rule looks for partial results, and reduces the import object count for certain pipelines by inserting additional combiner pipelines below.
Currently, this rule focues on partial aggregates only.