Uses of Class
org.apache.hadoop.hive.ql.optimizer.stats.annotation.StatsRulesProcFactory.DefaultStatsRule

Packages that use StatsRulesProcFactory.DefaultStatsRule

org.apache.hadoop.hive.ql.optimizer.stats.annotation

Uses of StatsRulesProcFactory.DefaultStatsRule in org.apache.hadoop.hive.ql.optimizer.stats.annotation

Subclasses of StatsRulesProcFactory.DefaultStatsRule in org.apache.hadoop.hive.ql.optimizer.stats.annotation

static class	StatsRulesProcFactory.FilterStatsRule FILTER operator does not change the average row size but it does change the number of rows emitted.
static class	StatsRulesProcFactory.GroupByStatsRule GROUPBY operator changes the number of rows.
static class	StatsRulesProcFactory.JoinStatsRule JOIN operator can yield any of the following three cases The values of join keys are disjoint in both relations in which case T(RXS) = 0 (we need histograms for this) Join key is primary key on relation R and foreign key on relation S in which case every tuple in S will have a tuple in R T(RXS) = T(S) (we need histograms for this) Both R & S relation have same value for join-key.
static class	StatsRulesProcFactory.LimitStatsRule LIMIT operator changes the number of rows and thereby the data size.
static class	StatsRulesProcFactory.SelectStatsRule SELECT operator doesn't change the number of rows emitted from the parent operator.
static class	StatsRulesProcFactory.TableScanStatsRule Collect basic statistics like number of rows, data size and column level statistics from the table.