org.apache.hadoop.hive.ql.metadata
Interface InputEstimator

public interface InputEstimator

Nested Class Summary

static class

InputEstimator.Estimation

Method Summary

InputEstimator.Estimation

estimate(org.apache.hadoop.mapred.JobConf job, TableScanOperator ts, long remaining) Estimate input size based on filter and projection on table scan operator

Method Detail

estimate

InputEstimator.Estimation estimate(org.apache.hadoop.mapred.JobConf job,
                                   TableScanOperator ts,
                                   long remaining)
                                   throws HiveException

Estimate input size based on filter and projection on table scan operator

Parameters:

remaining - Early exit condition. If it has positive value, further estimation can be canceled on the point of exceeding it. In this case, return any bigger length value then this (Long.MAX_VALUE, for eaxmple).

Throws:

HiveException