fix(canal): fix mysql unsigned medium int #399
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siddontang
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Jul 8, 2019
canal/rows.go
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| @@ -57,7 +58,14 @@ func (r *RowsEvent) handleUnsigned() { | |||
| case int16: | |||
| r.Rows[i][index] = uint16(t) | |||
| case int32: | |||
| r.Rows[i][index] = uint32(t) | |||
| if strings.Contains(strings.ToLower(r.Table.Columns[i].RawType), "mediumint") { | |||
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interesting, can you add some comments here?
maybe it is better to add a test.
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Maybe the implementation from gh-ost is better and more clear?
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@siddontang added comments and test.
@NearTan I think so, thanks.
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Maybe we can do more, to add a similar MediumIntColumnType.
I worry that comparing string every time can reduce the performance.
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this is port from moiot/gravity#182.
the problem is we use int32 to receive mysql medium int value, which is 3 bytes. When it's unsigned, simply do a type cast is not sufficient.