Contents

Class LimitKernel

Inheritance Relationships

Base Type

Class Documentation

class ral::batch::LimitKernel : public ral::cache::distributing_kernel

This kernel only returns a specified number of rows given by their corresponding logical limit expression.

Public Functions

LimitKernel(std::size_t kernel_id, const std::string &queryString, std::shared_ptr<Context> context, std::shared_ptr<ral::cache::graph> query_graph)
inline virtual std::string kernel_name()
ral::execution::task_result do_process(std::vector<std::unique_ptr<ral::frame::BlazingTable>> inputs, std::shared_ptr<ral::cache::CacheMachine> output, cudaStream_t stream, const std::map<std::string, std::string> &args) override
virtual kstatus run() override

Executes the batch processing. Loads the data from their input port, and after processing it, the results are stored in their output port.

Return

kstatus ‘stop’ to halt processing, or ‘proceed’ to continue processing.

Class JoinPartitionKernel Class MergeAggregateKernel