imay commented on a change in pull request #1343: Thrift definition for 
scanning data ability for computing system
URL: https://github.com/apache/incubator-doris/pull/1343#discussion_r295760542
 
 

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 File path: gensrc/thrift/DorisScanService.thrift
 ##########
 @@ -0,0 +1,162 @@
+// Licensed to the Apache Software Foundation (ASF) under one
+// or more contributor license agreements.  See the NOTICE file
+// distributed with this work for additional information
+// regarding copyright ownership.  The ASF licenses this file
+// to you 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
+//
+//   http://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.
+
+namespace java org.apache.doris.thrift
+namespace cpp doris
+
+enum TScanPrimitiveType {
+  INVALID_TYPE,
+  NULL_TYPE,
+  BOOLEAN,
+  TINYINT,
+  SMALLINT,
+  INT,
+  BIGINT,
+  FLOAT,
+  DOUBLE,
+  DATE,
+  DATETIME,
+  BINARY,
+  DECIMAL,
+  // CHAR(n). Currently only supported in UDAs
+  CHAR,
+  LARGEINT,
+  VARCHAR,
+  HLL,
+}
+
+struct TScanColumnDesc {
+  // The column name
+  1: optional string name
+  // The column type. Always set.
+  2: optional TScanPrimitiveType type
 
 Review comment:
   only PrimitiveType? how about decimal? string with length?

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