add ColumnarScanContext

[yongman]

What is changed and how it works?

Proposal: xxx

What's Changed:

Add ColumnarScanContext detail infos to ExecutorExecutionSummary when the query path is columnar.

How it Works:

ColumnarScanContext will be filled in tiflash compute node and transfer the summary to TiDB.

Related changes

• PR to update pingcap/docs/pingcap/docs-cn:
• Need to cherry-pick to the release branch

TiDB root@localhost:test> explain analyze select * from t;
+----------------------+---------+---------+--------------+---------------+---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+-------------------------------------------+----------+------+
| id                   | estRows | actRows | task         | access object | execution info                                                                                                                                                                                                                                                                                                                                                                                                | operator info                             | memory   | disk |
+----------------------+---------+---------+--------------+---------------+---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+-------------------------------------------+----------+------+
| TableReader_12       | 8204.00 | 8204    | root         | partition:all | time:78ms, loops:10, RU:6.38, cop_task: {num: 2, max: 0s, min: 0s, avg: 0s, p95: 0s, copr_cache_hit_ratio: 0.00}                                                                                                                                                                                                                                                                                              | MppVersion: 2, data:ExchangeSender_11     | 192.7 KB | N/A  |
| └─ExchangeSender_11  | 8204.00 | 8204    | mpp[tiflash] |               | tiflash_task:{time:69.7ms, loops:1, threads:1}                                                                                                                                                                                                                                                                                                                                                                | ExchangeType: PassThrough                 | N/A      | N/A  |
|   └─TableFullScan_10 | 8204.00 | 8204    | mpp[tiflash] | table:t       | tiflash_task:{time:57.7ms, loops:1, threads:1}, columnar_scan:{mvcc_input_rows:8204, mvcc_input_bytes:360976, mvcc_output_rows:8204, regions:1, read_tasks:1, physical_tables:3, columns:3, user_read_bytes:155876, read_block:8ms, serialize_block:4ms, init_reader:16ms, prefetch:4ms, deserialize_block:3ms, rough_check:{total:0, selected:0, skipped:0, unknown:0}, remote_segments:0, total_segments:4} | keep order:false, PartitionTableScan:true | N/A      | N/A  |
+----------------------+---------+---------+--------------+---------------+---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+-------------------------------------------+----------+------+

3 rows in set
Time: 0.091s

[pingcap-cla-assistant]

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