invalid range,range.start should be smaller than range.end

[superlzs0476]

Bug Report

Please answer these questions before submitting your issue. Thanks!

1. What did you do?
   Execute query output errors .
   SQL:
   select count(*) from transaction_stats_tab WHERE (whs_id = 'IDG' AND transaction_type = 2

2. What did you expect to see?
   Execute successful.

3. What did you see instead?
   ERROR 1105(HY0000):other error: unknown error StringError("[src/coprocessor/dag/executor/table_scan.rs:56]: invalid range,range.start should be smaller than range.end, but got [[116, 128, 0, 0, 0, 0, 0, 19, 96, 95, 114, 254, 66, 203, 60, 110, 208, 160, 57],[116, 128, 0, 0, 0, 0, 0, 19, 96, 95, 114, 0, 28, 248, 3, 250, 72, 160, 57])")

4. What version of TiDB are you using (tidb-server -V or run select tidb_version(); on TiDB)?
   Release Version: v2.1.0-5-g4dad722
   Git Commit Hash: 4dad722
   Git Branch: release-2.1
   UTC Build Time: 2018-12-07 02:29:19
   GoVersion: go version go1.11.2 linux/amd64
   Race Enabled: false
   TiKV Min Version: 2.1.0-alpha.1-ff3dd160846b7d1aed9079c389fc188f7f5ea13e
   Check Table Before Drop: false

[shenli]

@superlzs0476 Could please provide the schema?

[alivxxx]

@superlzs0476 Could you also provide the statistics?

[alivxxx]

The wrong range comes from feedback when split ranges. Can we cherry-pick the part that relates to feedback of #7921? @winoros