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/*
 * 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.spi.connector;

import java.util.Optional;

public interface MetadataProvider
{
    MetadataProvider NOOP_METADATA_PROVIDER = (session, tableName) -> Optional.empty();

    /**
     * Return relation schema or empty if relation does not exist.
     */
    Optional getRelationMetadata(ConnectorSession session, CatalogSchemaTableName tableName);
}