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server: fix ComStmtSendLongData when data length is 0 (#7485) #7508

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merged 2 commits into from
Aug 28, 2018
Merged

server: fix ComStmtSendLongData when data length is 0 (#7485) #7508

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server: fix ComStmtSendLongData when data length is 0 (#7485)
jackysp Aug 27, 2018
51d5192
Merge branch 'release-2.0' into send-long-data
coocood Aug 28, 2018
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7 changes: 6 additions & 1 deletion server/driver_tidb.go
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Original file line number Diff line number Diff line change
Expand Up @@ -83,7 +83,12 @@ func (ts *TiDBStatement) AppendParam(paramID int, data []byte) error {
if paramID >= len(ts.boundParams) {
return mysql.NewErr(mysql.ErrWrongArguments, "stmt_send_longdata")
}
ts.boundParams[paramID] = append(ts.boundParams[paramID], data...)
// If len(data) is 0, append an empty byte slice to the end to distinguish no data and no parameter.
if len(data) == 0 {
ts.boundParams[paramID] = []byte{}
} else {
ts.boundParams[paramID] = append(ts.boundParams[paramID], data...)
}
return nil
}

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