org.apache.hadoop.hive.ql.CompilationOpContext Maven / Gradle / Ivy
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* http://www.apache.org/licenses/LICENSE-2.0
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package org.apache.hadoop.hive.ql;
import java.util.HashMap;
import java.util.Map;
import java.util.concurrent.atomic.AtomicInteger;
import org.apache.hadoop.hive.ql.parse.ColumnStatsList;
/**
* A subset of compilation context that is passed to operators to get rid of some globals.
* Perhaps this should be rolled into main Context; however, some code necessitates storing the
* context in the operators for now, so this may not be advisable given how much stuff the main
* Context class contains.
* For now, only the operator sequence ID lives here.
*/
public class CompilationOpContext {
private final AtomicInteger opSeqId = new AtomicInteger(0);
private final Map colStatsCache =
new HashMap<>();
public int nextOperatorId() {
return opSeqId.getAndIncrement();
}
public Map getColStatsCache() {
return colStatsCache;
}
}