| /* |
| * 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. |
| */ |
| |
| /** |
| * File format description for CarbonData index file for btree. |
| */ |
| namespace java org.apache.carbondata.format |
| |
| include "schema.thrift" |
| include "carbondata.thrift" |
| |
| /** |
| * Header information stored in index file |
| */ |
| struct IndexHeader{ |
| 1: required i32 version; // Version used for data compatibility |
| 2: required list<schema.ColumnSchema> table_columns; // Description of columns in this file |
| 3: required carbondata.SegmentInfo segment_info; // Segment info (will be same/repeated for all files in this segment) |
| 4: optional i32 bucket_id; // Bucket number in which file contains |
| 5: optional i64 schema_time_stamp; // Timestamp to compare column schema against master schema |
| 6: optional bool is_sort; // True if the data is sorted in this file, it is used for compaction to decide whether to use merge sort or not |
| } |
| |
| /** |
| * Block index information stored in index file for every block |
| */ |
| struct BlockIndex{ |
| 1: required i64 num_rows; // Total number of rows in this file |
| 2: required string file_name; // Block file name |
| 3: required i64 offset; // Offset of the footer |
| 4: required carbondata.BlockletIndex block_index; // Blocklet index |
| 5: optional carbondata.BlockletInfo3 blocklet_info; |
| 6: optional i64 file_size // Record the valid size for appendable carbon file |
| } |