load data with same field and line term value lead to miss rows

[lysu]

Bug Report

Please answer these questions before submitting your issue. Thanks!

1. Minimal reproduce step (Required)

create table t(a int, b int);

load data

1|2|3

into t.

2. What did you expect to see? (Required)

with fields terminated by '|' lines terminated by '\n', result should be

row1: 1 2

with fields terminated by '|' lines terminated by '|', result should be

row1: 1 2
row2: 3 <nil>

3. What did you see instead (Required)

with fields terminated by '|' lines terminated by '|' got:

row1: 1 2

in master and 5.0

row1: 1 <nil>
row2: 2 <nil>
row3: 3 <nil>

in 4.0.x or before

4. What is your TiDB version? (Required)

4.0.10
5.0.rc
master

[zyguan]

Decrease the severity since it's not a common usage.