spark技术分享DetermineTableStats Logical PostHoc Resolution Rule — Computing Total Size Table Statistic for HiveTableRelations
DetermineTableStats is a logical posthoc resolution rule that the Hive-specific logical query plan analyzer uses to compute total size table statistic for HiveTableRelations with no statistics.
Technically, DetermineTableStats is a Catalyst rule for transforming logical plans, i.e. Rule[LogicalPlan].
apply Method
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apply(plan: LogicalPlan): LogicalPlan |
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Note
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apply is part of Rule Contract to apply a rule to a logical plan (aka execute a rule).
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apply…FIXME
