feat(datasource): 支持通过 query-ds-enabled 关闭数据库配置表加载扩展数据源

新增 spring.datasource.druid.query-ds-enabled 配置项，默认开启；显式设为
false 时跳过从 gen_datasource_conf 表加载扩展数据源，便于不依赖该表的部署
场景关闭此行为。

pigx-common/pigx-common-datasource/src/main/java/com/pig4cloud/pigx/common/datasource/config/DruidDataSourceProperties.java

@@ -39,4 +39,9 @@ public class DruidDataSourceProperties extends DruidConfig {
      */
     private String queryDsSql = "select * from gen_datasource_conf where del_flag = ?";
 
+    /**
+     * 是否从数据库配置表加载扩展数据源，默认开启
+     */
+    private Boolean queryDsEnabled = true;
+
 }

pigx-common/pigx-common-datasource/src/main/java/com/pig4cloud/pigx/common/datasource/config/JdbcDynamicDataSourceProvider.java

@@ -28,10 +28,12 @@ import com.pig4cloud.pigx.common.datasource.util.DsTypeEnum;
 import lombok.extern.slf4j.Slf4j;
 import org.jasypt.encryption.StringEncryptor;
 
+import javax.sql.DataSource;
 import java.sql.PreparedStatement;
 import java.sql.ResultSet;
 import java.sql.SQLException;
 import java.sql.Statement;
+import java.util.Collections;
 import java.util.HashMap;
 import java.util.Map;
 
@@ -58,6 +60,20 @@ public class JdbcDynamicDataSourceProvider extends AbstractJdbcDataSourceProvide
         this.properties = properties;
     }
 
+    /**
+     * 加载所有数据源
+     *
+     * @return 所有数据源
+     */
+    @Override
+    public Map<String, DataSource> loadDataSources() {
+        if (!isQueryDsEnabled()) {
+            log.debug("spring.datasource.druid.query-ds-enabled=false，已关闭数据库配置表加载");
+            return Collections.emptyMap();
+        }
+        return super.loadDataSources();
+    }
+
     /**
      * 执行语句获得数据源参数
      *
@@ -123,4 +139,13 @@ public class JdbcDynamicDataSourceProvider extends AbstractJdbcDataSourceProvide
         return map;
     }
 
+    /**
+     * 是否开启从数据库配置表加载扩展数据源
+     *
+     * @return true 开启（默认）；仅显式配置为 false 时关闭
+     */
+    boolean isQueryDsEnabled() {
+        return !Boolean.FALSE.equals(properties.getQueryDsEnabled());
+    }
+
 }

pigx-common/pigx-common-datasource/src/test/java/com/pig4cloud/pigx/common/datasource/config/JdbcDynamicDataSourceProviderTests.java

@@ -0,0 +1,60 @@
+package com.pig4cloud.pigx.common.datasource.config;
+
+import com.baomidou.dynamic.datasource.creator.DefaultDataSourceCreator;
+import org.jasypt.encryption.StringEncryptor;
+import org.junit.jupiter.api.Test;
+
+import static org.assertj.core.api.Assertions.assertThat;
+
+/**
+ * {@link JdbcDynamicDataSourceProvider} 单元测试：验证 query-ds-enabled 开关的默认开启与显式关闭行为
+ *
+ * @author lengleng
+ * @date 2026/7/6
+ */
+class JdbcDynamicDataSourceProviderTests {
+
+	@Test
+	void enablesJdbcTableLoadingByDefault() {
+		DruidDataSourceProperties properties = druidProperties();
+		JdbcDynamicDataSourceProvider provider = newProvider(properties);
+
+		assertThat(provider.isQueryDsEnabled()).isTrue();
+	}
+
+	@Test
+	void skipsJdbcTableLoadingWhenDisabledExplicitly() {
+		DruidDataSourceProperties properties = druidProperties();
+		properties.setQueryDsEnabled(false);
+
+		JdbcDynamicDataSourceProvider provider = newProvider(properties);
+
+		assertThat(provider.loadDataSources()).isEmpty();
+		assertThat(provider.isQueryDsEnabled()).isFalse();
+	}
+
+	private static JdbcDynamicDataSourceProvider newProvider(DruidDataSourceProperties properties) {
+		StringEncryptor stringEncryptor = new StringEncryptor() {
+			@Override
+			public String encrypt(String message) {
+				return message;
+			}
+
+			@Override
+			public String decrypt(String encryptedMessage) {
+				return encryptedMessage;
+			}
+		};
+		return new JdbcDynamicDataSourceProvider(new DefaultDataSourceCreator(), stringEncryptor, properties);
+	}
+
+	private static DruidDataSourceProperties druidProperties() {
+		DruidDataSourceProperties properties = new DruidDataSourceProperties();
+		properties.setDriverClassName("not.exists.Driver");
+		properties.setUrl("jdbc:not-executed");
+		properties.setUsername("root");
+		properties.setPassword("root");
+		return properties;
+	}
+
+}