spark技术分享

2012-07-24admin阅读(1639)赞(0)

Distribution — Contract For Data Distribution Across Partitions

2012-07-23admin阅读(1977)赞(0)

ExchangeCoordinator Caution FIXME postShuffleRDD Method Caution FIXME

2012-07-22admin阅读(1820)赞(0)

Partitioning — Specification of Physical Operator’s Output Partitions

2012-07-21admin阅读(1298)赞(0)

ProjectEstimation ProjectEstimation is…​FIXME Estimating Statistics and Query Hints of Project Logi ...

2012-07-20admin阅读(1443)赞(0)

JoinEstimation JoinEstimation is a utility that computes statistics estimates and query hints of a Join logical op ...

2012-07-19admin阅读(1451)赞(0)

FilterEstimation FilterEstimation is…​FIXME computeEqualityPossibilityByHistogram Internal Method [ ...

2012-07-18admin阅读(1527)赞(0)

AggregateEstimation AggregateEstimation is…​FIXME Estimating Statistics and Query Hints of Aggregat ...

2012-07-17admin阅读(3199)赞(0)

BasicStatsPlanVisitor — Computing Statistics for Cost-Based Optimization

2012-07-16admin阅读(2285)赞(0)

SizeInBytesOnlyStatsPlanVisitor — LogicalPlanVisitor for Total Size (in Bytes) Statistic Only

2012-07-15admin阅读(2033)赞(0)

LogicalPlanVisitor — Contract for Computing Statistic Estimates and Query Hints of Logical Plan