Add Oracle Dialect for ChatMemory

memory/repository/spring-ai-model-chat-memory-repository-jdbc/pom.xml

@@ -50,11 +50,6 @@
 			<artifactId>spring-jdbc</artifactId>
 		</dependency>
 
-		<dependency>
-			<groupId>com.zaxxer</groupId>
-			<artifactId>HikariCP</artifactId>
-		</dependency>
-
 		<!-- TESTING -->
 
 		<dependency>
@@ -85,6 +80,18 @@
 			<optional>true</optional>
 		</dependency>
 
+		<dependency>
+			<groupId>com.oracle.database.jdbc</groupId>
+			<artifactId>ojdbc11</artifactId>
+			<version>23.4.0.24.05</version>
+		</dependency>
+
+		<dependency>
+			<groupId>org.springframework.boot</groupId>
+			<artifactId>spring-boot-starter-jdbc</artifactId>
+			<scope>test</scope>
+		</dependency>
+
 		<dependency>
 			<groupId>org.springframework.boot</groupId>
 			<artifactId>spring-boot-starter-test</artifactId>

memory/repository/spring-ai-model-chat-memory-repository-jdbc/src/main/java/org/springframework/ai/chat/memory/repository/jdbc/JdbcChatMemoryRepositoryDialect.java

@@ -78,6 +78,7 @@ static JdbcChatMemoryRepositoryDialect from(DataSource dataSource) {
 			case "MySQL", "MariaDB" -> new MysqlChatMemoryRepositoryDialect();
 			case "Microsoft SQL Server" -> new SqlServerChatMemoryRepositoryDialect();
 			case "HSQL Database Engine" -> new HsqldbChatMemoryRepositoryDialect();
+			case "Oracle" -> new OracleChatMemoryRepositoryDialect();
 			default -> // Add more as needed
 				new PostgresChatMemoryRepositoryDialect();
 		};

memory/repository/spring-ai-model-chat-memory-repository-jdbc/src/main/java/org/springframework/ai/chat/memory/repository/jdbc/OracleChatMemoryRepositoryDialect.java

@@ -0,0 +1,24 @@
+package org.springframework.ai.chat.memory.repository.jdbc;
+
+public class OracleChatMemoryRepositoryDialect implements JdbcChatMemoryRepositoryDialect {
+
+	@Override
+	public String getSelectMessagesSql() {
+		return "SELECT content, type FROM SPRING_AI_CHAT_MEMORY WHERE CONVERSATION_ID = ? ORDER BY \"TIMESTAMP\"";
+	}
+
+	@Override
+	public String getInsertMessageSql() {
+		return "INSERT INTO SPRING_AI_CHAT_MEMORY (CONVERSATION_ID, CONTENT, TYPE, \"TIMESTAMP\") VALUES (?, ?, ?, ?)";
+	}
+
+	@Override
+	public String getSelectConversationIdsSql() {
+		return "SELECT DISTINCT conversation_id FROM SPRING_AI_CHAT_MEMORY";
+	}
+
+	@Override
+	public String getDeleteMessagesSql() {
+		return "DELETE FROM SPRING_AI_CHAT_MEMORY WHERE CONVERSATION_ID = ?";
+	}
+}

memory/repository/spring-ai-model-chat-memory-repository-jdbc/src/main/resources/org/springframework/ai/chat/memory/repository/jdbc/schema-oracle.sql

@@ -0,0 +1,21 @@
+DROP TABLE SPRING_AI_CHAT_MEMORY;
+
+CREATE TABLE SPRING_AI_CHAT_MEMORY (
+    CONVERSATION_ID VARCHAR2(36 CHAR) NOT NULL,
+    CONTENT CLOB NOT NULL,
+    "TYPE" VARCHAR2(10 CHAR) NOT NULL CHECK (
+        "TYPE" IN (
+            'USER',
+            'ASSISTANT',
+            'SYSTEM',
+            'TOOL'
+        )
+    ),
+    "TIMESTAMP" TIMESTAMP NOT NULL
+);
+
+CREATE INDEX SPRING_AI_CHAT_MEMORY_CONVERSATION_ID_TIMESTAMP_IDX
+    ON SPRING_AI_CHAT_MEMORY(
+        CONVERSATION_ID,
+        'TIMESTAMP'
+    );

memory/repository/spring-ai-model-chat-memory-repository-jdbc/src/test/java/org/springframework/ai/chat/memory/repository/jdbc/JdbcChatMemoryRepositoryOracleIT.java

@@ -0,0 +1,16 @@
+package org.springframework.ai.chat.memory.repository.jdbc;
+
+import org.springframework.boot.test.context.SpringBootTest;
+import org.springframework.test.context.TestPropertySource;
+import org.springframework.test.context.jdbc.Sql;
+
+@SpringBootTest
+@TestPropertySource(properties = {
+		"spring.datasource.url=jdbc:oracle:thin:@localhost:1521/FREEPDB1",
+		"spring.datasource.username=scott",
+		"spring.datasource.password=tiger"})
+
+@Sql(scripts = "classpath:org/springframework/ai/chat/memory/repository/jdbc/schema-oracle.sql")
+class JdbcChatMemoryRepositoryOracleIT extends AbstractJdbcChatMemoryRepositoryIT {
+
+}

spring-ai-docs/src/main/antora/modules/ROOT/pages/api/chat-memory.adoc

@@ -128,6 +128,7 @@ Spring AI supports multiple relational databases via a dialect abstraction. The
 - MySQL / MariaDB
 - SQL Server
 - HSQLDB
+- Oracle Database
 
 The correct dialect can be auto-detected from the JDBC URL when using `JdbcChatMemoryRepositoryDialect.from(DataSource)`. You can extend support for other databases by implementing the `JdbcChatMemoryRepositoryDialect` interface.