org.apache.hadoop.hive.ql.io.sarg.PredicateLeaf Maven / Gradle / Ivy
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* to you under the Apache License, Version 2.0 (the
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* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
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*/
package org.apache.hadoop.hive.ql.io.sarg;
import org.apache.hadoop.hive.serde2.io.HiveDecimalWritable;
import java.sql.Date;
import java.sql.Timestamp;
import java.util.List;
/**
* The primitive predicates that form a SearchArgument.
*/
public interface PredicateLeaf {
/**
* The possible operators for predicates. To get the opposites, construct
* an expression with a not operator.
*/
public static enum Operator {
EQUALS,
NULL_SAFE_EQUALS,
LESS_THAN,
LESS_THAN_EQUALS,
IN,
BETWEEN,
IS_NULL
}
/**
* The possible types for sargs.
*/
public static enum Type {
LONG(Long.class), // all of the integer types
FLOAT(Double.class), // float and double
STRING(String.class), // string, char, varchar
DATE(Date.class),
DECIMAL(HiveDecimalWritable.class),
TIMESTAMP(Timestamp.class),
BOOLEAN(Boolean.class);
private final Class cls;
Type(Class cls) {
this.cls = cls;
}
/**
* For all SARG leaves, the values must be the matching class.
* @return the value class
*/
public Class getValueClass() {
return cls;
}
}
/**
* Get the operator for the leaf.
*/
public Operator getOperator();
/**
* Get the type of the column and literal by the file format.
*/
public Type getType();
/**
* Get the simple column name.
* @return the column name
*/
public String getColumnName();
/**
* Get the literal half of the predicate leaf. Adapt the original type for what orc needs
*
* @return an Integer, Long, Double, or String
*/
public Object getLiteral();
/**
* For operators with multiple literals (IN and BETWEEN), get the literals.
*
* @return the list of literals (Integer, Longs, Doubles, or Strings)
*
*/
public List