io.trino.plugin.hive.CanonicalizeHiveTimezoneId Maven / Gradle / Ivy
/*
* Licensed 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
* limitations under the License.
*/
package io.trino.plugin.hive;
import io.airlift.slice.Slice;
import io.trino.spi.function.LiteralParameters;
import io.trino.spi.function.ScalarFunction;
import io.trino.spi.function.SqlType;
import java.time.ZoneId;
import static io.airlift.slice.Slices.utf8Slice;
/**
* Translate timezone id used by Hive to canonical form which is understandable by Trino; used in Hive view translation logic
*/
public final class CanonicalizeHiveTimezoneId
{
private CanonicalizeHiveTimezoneId() {}
@ScalarFunction(value = "$canonicalize_hive_timezone_id", hidden = true)
@LiteralParameters("x")
@SqlType("varchar")
public static Slice canonicalizeHiveTimezoneId(@SqlType("varchar(x)") Slice hiveTimeZoneId)
{
if (hiveTimeZoneId != null) {
String zoneId = hiveTimeZoneId.toStringUtf8();
if (ZoneId.SHORT_IDS.containsKey(zoneId)) {
return utf8Slice(ZoneId.SHORT_IDS.get(zoneId));
}
}
return hiveTimeZoneId;
}
}
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