/**
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
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package org.apache.hadoop.hive.ql.optimizer.calcite.reloperators;
import java.util.Set;
import org.apache.calcite.sql.SqlFunction;
import org.apache.calcite.sql.SqlFunctionCategory;
import org.apache.calcite.sql.SqlKind;
import org.apache.calcite.sql.SqlOperatorBinding;
import org.apache.calcite.sql.fun.SqlMonotonicUnaryFunction;
import org.apache.calcite.sql.type.OperandTypes;
import org.apache.calcite.sql.type.ReturnTypes;
import org.apache.calcite.sql.validate.SqlMonotonicity;
import com.google.common.collect.Sets;
public class HiveFloorDate extends SqlMonotonicUnaryFunction {
public static final SqlFunction YEAR = new HiveFloorDate("FLOOR_YEAR");
public static final SqlFunction QUARTER = new HiveFloorDate("FLOOR_QUARTER");
public static final SqlFunction MONTH = new HiveFloorDate("FLOOR_MONTH");
public static final SqlFunction WEEK = new HiveFloorDate("FLOOR_WEEK");
public static final SqlFunction DAY = new HiveFloorDate("FLOOR_DAY");
public static final SqlFunction HOUR = new HiveFloorDate("FLOOR_HOUR");
public static final SqlFunction MINUTE = new HiveFloorDate("FLOOR_MINUTE");
public static final SqlFunction SECOND = new HiveFloorDate("FLOOR_SECOND");
public static final Set<SqlFunction> ALL_FUNCTIONS =
Sets.newHashSet(YEAR, QUARTER, MONTH, WEEK, DAY, HOUR, MINUTE, SECOND);
private HiveFloorDate(String name) {
super(name, SqlKind.FLOOR, ReturnTypes.ARG0_OR_EXACT_NO_SCALE, null,
OperandTypes.sequence(
"'" + SqlKind.FLOOR + "(<DATE> TO <TIME_UNIT>)'\n"
+ "'" + SqlKind.FLOOR + "(<TIME> TO <TIME_UNIT>)'\n"
+ "'" + SqlKind.FLOOR + "(<TIMESTAMP> TO <TIME_UNIT>)'",
OperandTypes.DATETIME,
OperandTypes.ANY),
SqlFunctionCategory.NUMERIC);
}
@Override
public SqlMonotonicity getMonotonicity(SqlOperatorBinding call) {
// Monotonic iff its first argument is, but not strict.
return call.getOperandMonotonicity(0).unstrict();
}
}