(improvement) (semantic) support metric data batch download (#358)

Co-authored-by: jolunoluo

semantic/api/src/main/java/com/tencent/supersonic/semantic/api/model/pojo/DrillDownDimension.java

@@ -13,4 +13,7 @@ public class DrillDownDimension {
 
     private boolean necessary;
 
+    public DrillDownDimension(Long dimensionId) {
+        this.dimensionId = dimensionId;
+    }
 }

semantic/api/src/main/java/com/tencent/supersonic/semantic/api/model/response/MetricResp.java

@@ -62,4 +62,14 @@ public class MetricResp extends SchemaItem {
         return relateDimension.getDrillDownDimensions().stream().filter(DrillDownDimension::isNecessary)
                .map(DrillDownDimension::getDimensionId).collect(Collectors.toSet());
     }
+
+    public String getRelaDimensionIdKey() {
+        if (relateDimension == null || CollectionUtils.isEmpty(relateDimension.getDrillDownDimensions())) {
+            return "";
+        }
+        return relateDimension.getDrillDownDimensions().stream()
+                .map(DrillDownDimension::getDimensionId)
+                .map(String::valueOf)
+                .collect(Collectors.joining(","));
+    }
 }

semantic/api/src/main/java/com/tencent/supersonic/semantic/api/query/pojo/DataDownload.java

@@ -0,0 +1,15 @@
+package com.tencent.supersonic.semantic.api.query.pojo;
+
+import lombok.Builder;
+import lombok.Data;
+import java.util.List;
+
+@Data
+@Builder
+public class DataDownload {
+
+    List<List<String>> headers;
+
+    List<List<String>> data;
+
+}

semantic/api/src/main/java/com/tencent/supersonic/semantic/api/query/request/BatchDownloadReq.java

@@ -0,0 +1,14 @@
+package com.tencent.supersonic.semantic.api.query.request;
+
+import com.tencent.supersonic.common.pojo.DateConf;
+import lombok.Data;
+import java.util.List;
+
+@Data
+public class BatchDownloadReq {
+
+    private List<Long> metricIds;
+
+    private DateConf dateInfo;
+
+}