#75 - Add support for MySQL using jasync-mysql.

We now support MySQL through the jasync-mysql driver that exposes its asynchronous functionality through a R2DBC wrapper implementation.

Jasync uses for now its own exceptions.

Original pull request: #84.

src/main/java/org/springframework/data/r2dbc/dialect/AnonymousBindMarkers.java

@@ -5,7 +5,7 @@
  * 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
+ *      https://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,

src/main/java/org/springframework/data/r2dbc/dialect/Database.java

@@ -53,6 +53,18 @@ public enum Database {
 		public Dialect defaultDialect() {
 			return H2Dialect.INSTANCE;
 		}
+	},
+
+	MYSQL {
+		@Override
+		public String driverName() {
+			return "MySQL";
+		}
+
+		@Override
+		public Dialect defaultDialect() {
+			return MySqlDialect.INSTANCE;
+		}
 	};
 
 	/**

src/main/java/org/springframework/data/r2dbc/dialect/IndexedBindMarker.java

@@ -5,7 +5,7 @@
  * 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
+ *      https://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,

src/main/java/org/springframework/data/r2dbc/dialect/MySqlDialect.java

@@ -0,0 +1,109 @@
+/*
+ * Copyright 2019 the original author or authors.
+ *
+ * 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
+ *
+ *      https://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.springframework.data.r2dbc.dialect;
+
+import java.net.InetAddress;
+import java.net.URI;
+import java.net.URL;
+import java.util.Arrays;
+import java.util.Collection;
+import java.util.HashSet;
+import java.util.Set;
+import java.util.UUID;
+
+/**
+ * An SQL dialect for MySQL.
+ *
+ * @author Mark Paluch
+ */
+public class MySqlDialect implements Dialect {
+
+	private static final Set<Class<?>> SIMPLE_TYPES = new HashSet<>(
+			Arrays.asList(UUID.class, URL.class, URI.class, InetAddress.class));
+
+	/**
+	 * Singleton instance.
+	 */
+	public static final MySqlDialect INSTANCE = new MySqlDialect();
+
+	private static final BindMarkersFactory ANONYMOUS = BindMarkersFactory.anonymous("?");
+
+	private static final LimitClause LIMIT_CLAUSE = new LimitClause() {
+
+		/*
+		 * (non-Javadoc)
+		 * @see org.springframework.data.r2dbc.dialect.LimitClause#getClause(long, long)
+		 */
+		@Override
+		public String getClause(long limit, long offset) {
+			return String.format("LIMIT %d,%d", limit, offset);
+		}
+
+		/*
+		 * (non-Javadoc)
+		 * @see org.springframework.data.r2dbc.dialect.LimitClause#getClause(long)
+		 */
+		@Override
+		public String getClause(long limit) {
+			return "LIMIT " + limit;
+		}
+
+		/*
+		 * (non-Javadoc)
+		 * @see org.springframework.data.r2dbc.dialect.LimitClause#getClausePosition()
+		 */
+		@Override
+		public Position getClausePosition() {
+			return Position.END;
+		}
+	};
+
+	/*
+	 * (non-Javadoc)
+	 * @see org.springframework.data.r2dbc.dialect.Dialect#getBindMarkersFactory()
+	 */
+	@Override
+	public BindMarkersFactory getBindMarkersFactory() {
+		return ANONYMOUS;
+	}
+
+	/*
+	 * (non-Javadoc)
+	 * @see org.springframework.data.r2dbc.dialect.Dialect#getSimpleTypesKeys()
+	 */
+	@Override
+	public Collection<? extends Class<?>> getSimpleTypes() {
+		return SIMPLE_TYPES;
+	}
+
+	/*
+	 * (non-Javadoc)
+	 * @see org.springframework.data.r2dbc.dialect.Dialect#limit()
+	 */
+	@Override
+	public LimitClause limit() {
+		return LIMIT_CLAUSE;
+	}
+
+	/*
+	 * (non-Javadoc)
+	 * @see org.springframework.data.r2dbc.dialect.Dialect#getArraySupport()
+	 */
+	@Override
+	public ArrayColumns getArraySupport() {
+		return ArrayColumns.Unsupported.INSTANCE;
+	}
+}