org.apache.hadoop.hive.ql.optimizer.calcite.rules.HivePartitionPruneRule Maven / Gradle / Ivy
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* to you under the Apache License, Version 2.0 (the
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package org.apache.hadoop.hive.ql.optimizer.calcite.rules;
import org.apache.calcite.plan.RelOptRule;
import org.apache.calcite.plan.RelOptRuleCall;
import org.apache.calcite.rel.core.Filter;
import org.apache.calcite.rex.RexNode;
import org.apache.calcite.util.Pair;
import org.apache.hadoop.hive.conf.HiveConf;
import org.apache.hadoop.hive.ql.optimizer.calcite.RelOptHiveTable;
import org.apache.hadoop.hive.ql.optimizer.calcite.reloperators.HiveFilter;
import org.apache.hadoop.hive.ql.optimizer.calcite.reloperators.HiveTableScan;
public class HivePartitionPruneRule extends RelOptRule {
HiveConf conf;
public HivePartitionPruneRule(HiveConf conf) {
super(operand(HiveFilter.class, operand(HiveTableScan.class, none())));
this.conf = conf;
}
@Override
public void onMatch(RelOptRuleCall call) {
HiveFilter filter = call.rel(0);
HiveTableScan tScan = call.rel(1);
perform(call, filter, tScan);
}
protected void perform(RelOptRuleCall call, Filter filter,
HiveTableScan tScan) {
RelOptHiveTable hiveTable = (RelOptHiveTable) tScan.getTable();
RexNode predicate = filter.getCondition();
Pair predicates = PartitionPrune
.extractPartitionPredicates(filter.getCluster(), hiveTable, predicate);
RexNode partColExpr = predicates.left;
hiveTable.computePartitionList(conf, partColExpr);
}
}