| /* |
| * 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.sqlserver.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.Arrays; |
| import java.util.EnumSet; |
| import java.util.List; |
| import java.util.Optional; |
| import java.util.Set; |
| import java.util.stream.Collectors; |
| |
| /** JDBC dialect for SqlServer. */ |
| @Internal |
| public class SqlServerDialect extends AbstractDialect { |
| @Override |
| public String dialectName() { |
| return "SqlServer"; |
| } |
| |
| /** |
| * The maximum precision is supported by datetime2. |
| * https://docs.microsoft.com/en-us/sql/t-sql/data-types/datetime2-transact-sql?view=sql-server-ver16 |
| */ |
| @Override |
| public Optional<Range> timestampPrecisionRange() { |
| return Optional.of(Range.of(0, 7)); |
| } |
| |
| /** |
| * The maximum precision is supported by decimal. |
| * https://docs.microsoft.com/en-us/sql/t-sql/data-types/precision-scale-and-length-transact-sql?view=sql-server-ver16 |
| */ |
| @Override |
| public Optional<Range> decimalPrecisionRange() { |
| return Optional.of(Range.of(0, 38)); |
| } |
| |
| @Override |
| public Optional<String> defaultDriverName() { |
| return Optional.of("com.microsoft.sqlserver.jdbc.SQLServerDriver"); |
| } |
| |
| @Override |
| public String quoteIdentifier(String identifier) { |
| return identifier; |
| } |
| |
| @Override |
| public Optional<String> getUpsertStatement( |
| String tableName, String[] fieldNames, String[] uniqueKeyFields) { |
| List<String> nonUniqueKeyFields = |
| Arrays.stream(fieldNames) |
| .filter(f -> !Arrays.asList(uniqueKeyFields).contains(f)) |
| .collect(Collectors.toList()); |
| String fieldsProjection = |
| Arrays.stream(fieldNames) |
| .map(this::quoteIdentifier) |
| .collect(Collectors.joining(", ")); |
| |
| String valuesBinding = |
| Arrays.stream(fieldNames) |
| .map(f -> ":" + f + " " + quoteIdentifier(f)) |
| .collect(Collectors.joining(", ")); |
| |
| String usingClause = String.format("SELECT %s", valuesBinding); |
| String onConditions = |
| Arrays.stream(uniqueKeyFields) |
| .map( |
| f -> |
| "[TARGET]." |
| + quoteIdentifier(f) |
| + "=[SOURCE]." |
| + quoteIdentifier(f)) |
| .collect(Collectors.joining(" AND ")); |
| String updateSetClause = |
| nonUniqueKeyFields.stream() |
| .map( |
| f -> |
| "[TARGET]." |
| + quoteIdentifier(f) |
| + "=[SOURCE]." |
| + quoteIdentifier(f)) |
| .collect(Collectors.joining(", ")); |
| |
| String insertValues = |
| Arrays.stream(fieldNames) |
| .map(f -> "[SOURCE]." + quoteIdentifier(f)) |
| .collect(Collectors.joining(", ")); |
| return Optional.of( |
| String.format( |
| "MERGE INTO %s AS [TARGET]" |
| + " USING (%s) AS [SOURCE]" |
| + " ON (%s)" |
| + " WHEN MATCHED THEN" |
| + " UPDATE SET %s" |
| + " WHEN NOT MATCHED THEN" |
| + " INSERT (%s) VALUES (%s);", |
| quoteIdentifier(tableName), |
| usingClause, |
| onConditions, |
| updateSetClause, |
| fieldsProjection, |
| insertValues)); |
| } |
| |
| @Override |
| public JdbcRowConverter getRowConverter(RowType rowType) { |
| return new SqlServerRowConverter(rowType); |
| } |
| |
| @Override |
| public String getLimitClause(long limit) { |
| throw new IllegalArgumentException("SqlServerDialect does not support limit clause"); |
| } |
| |
| @Override |
| public Set<LogicalTypeRoot> supportedTypes() { |
| return EnumSet.of( |
| LogicalTypeRoot.CHAR, |
| LogicalTypeRoot.VARCHAR, |
| LogicalTypeRoot.BOOLEAN, |
| LogicalTypeRoot.BINARY, |
| LogicalTypeRoot.VARBINARY, |
| LogicalTypeRoot.DECIMAL, |
| LogicalTypeRoot.TINYINT, |
| LogicalTypeRoot.SMALLINT, |
| LogicalTypeRoot.INTEGER, |
| LogicalTypeRoot.BIGINT, |
| LogicalTypeRoot.FLOAT, |
| LogicalTypeRoot.DOUBLE, |
| LogicalTypeRoot.DATE, |
| LogicalTypeRoot.TIME_WITHOUT_TIME_ZONE, |
| LogicalTypeRoot.TIMESTAMP_WITHOUT_TIME_ZONE, |
| LogicalTypeRoot.TIMESTAMP_WITH_TIME_ZONE, |
| LogicalTypeRoot.TIMESTAMP_WITH_LOCAL_TIME_ZONE); |
| } |
| } |