grzegorz8 commented on code in PR #67: URL: https://github.com/apache/flink-connector-jdbc/pull/67#discussion_r1399031136
########## flink-connector-jdbc/src/main/java/org/apache/flink/connector/jdbc/databases/elasticsearch/dialect/ElasticsearchDialect.java: ########## @@ -0,0 +1,111 @@ +/* + * 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 + * limitations under the License. + */ + +package org.apache.flink.connector.jdbc.databases.elasticsearch.dialect; + +import org.apache.flink.annotation.Internal; +import org.apache.flink.connector.jdbc.converter.JdbcRowConverter; +import org.apache.flink.connector.jdbc.dialect.AbstractDialect; +import org.apache.flink.table.types.logical.LogicalTypeRoot; +import org.apache.flink.table.types.logical.RowType; + +import java.util.EnumSet; +import java.util.Optional; +import java.util.Set; + +/** JDBC dialect for Elastic. */ +@Internal +public class ElasticsearchDialect extends AbstractDialect { + + private static final long serialVersionUID = 1L; + + // Define MAX/MIN precision of TIMESTAMP type according to Elastic docs: + // https://www.elastic.co/guide/en/elasticsearch/reference/current/sql-data-types.html + private static final int MIN_TIMESTAMP_PRECISION = 0; + private static final int MAX_TIMESTAMP_PRECISION = 9; + + @Override + public String dialectName() { + return "Elasticsearch"; + } + + @Override + public Optional<String> defaultDriverName() { + return Optional.of("org.elasticsearch.xpack.sql.jdbc.EsDriver"); + } + + @Override + public Set<LogicalTypeRoot> supportedTypes() { + // The list of types supported by Elastic SQL. + // https://www.elastic.co/guide/en/elasticsearch/reference/current/sql-data-types.html + return EnumSet.of( + LogicalTypeRoot.BIGINT, + LogicalTypeRoot.BOOLEAN, + LogicalTypeRoot.DATE, + LogicalTypeRoot.DOUBLE, + LogicalTypeRoot.INTEGER, + LogicalTypeRoot.FLOAT, + LogicalTypeRoot.SMALLINT, + LogicalTypeRoot.TINYINT, + LogicalTypeRoot.TIMESTAMP_WITHOUT_TIME_ZONE, + LogicalTypeRoot.VARBINARY, + LogicalTypeRoot.VARCHAR); + } + + @Override + public Optional<Range> timestampPrecisionRange() { + return Optional.of(Range.of(MIN_TIMESTAMP_PRECISION, MAX_TIMESTAMP_PRECISION)); + } + + @Override + public JdbcRowConverter getRowConverter(RowType rowType) { + return new ElasticsearchRowConverter(rowType); + } + + @Override + public String getLimitClause(long limit) { + return "LIMIT " + limit; + } + + @Override + public String quoteIdentifier(String identifier) { + return '"' + identifier + '"'; + } + + @Override + public Optional<String> getUpsertStatement( Review Comment: Do you mean `docs/content/docs/connectors/table/jdbc.md`? Which section is the most suitable one? -- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. To unsubscribe, e-mail: issues-unsubscr...@flink.apache.org For queries about this service, please contact Infrastructure at: us...@infra.apache.org
