fix(数据集):sql数据集优化

backend/src/main/java/io/dataease/service/dataset/DataSetTableService.java

@@ -74,6 +74,11 @@ public class DataSetTableService {
 
     public DatasetTable save(DatasetTable datasetTable) throws Exception {
         checkName(datasetTable);
+        if (StringUtils.equalsIgnoreCase(datasetTable.getType(), "sql")) {
+            DataSetTableRequest dataSetTableRequest = new DataSetTableRequest();
+            BeanUtils.copyBean(dataSetTableRequest, datasetTable);
+            getSQLPreview(dataSetTableRequest);
+        }
         if (StringUtils.isEmpty(datasetTable.getId())) {
             datasetTable.setId(UUID.randomUUID().toString());
             datasetTable.setCreateBy(AuthUtils.getUser().getUsername());
@@ -320,6 +325,10 @@ public class DataSetTableService {
         DatasourceRequest datasourceRequest = new DatasourceRequest();
         datasourceRequest.setDatasource(ds);
         String sql = new Gson().fromJson(dataSetTableRequest.getInfo(), DataTableInfoDTO.class).getSql();
+        // 使用输入的sql先预执行一次
+        datasourceRequest.setQuery(sql);
+        datasourceProvider.fetchResultAndField(datasourceRequest);
+        // 正式执行
         datasourceRequest.setQuery("SELECT * FROM (" + sql + ") AS tmp LIMIT 0,1000");
         Map<String, List> result = datasourceProvider.fetchResultAndField(datasourceRequest);
         List<String[]> data = result.get("dataList");