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cmd, expression: fix convert binary string to gbk #30004

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merged 5 commits into from
Nov 26, 2021
Merged

cmd, expression: fix convert binary string to gbk #30004

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cmd, expression: fix convert binary string to gbk
Defined2014 Nov 22, 2021
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Defined2014 Nov 24, 2021
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Defined2014 Nov 24, 2021
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Defined2014 Nov 24, 2021
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Merge branch 'master' into 29735
ti-chi-bot Nov 26, 2021
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Binary file modified cmd/explaintest/r/new_character_set_builtin.result
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7 changes: 7 additions & 0 deletions cmd/explaintest/t/new_character_set_builtin.test
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Original file line number Diff line number Diff line change
Expand Up @@ -57,6 +57,13 @@ select hex(convert('ㅂ' using gbk)), convert('ㅂ' using gbk);
select convert(a using binary) from t;
select convert(convert('中文' using gbk) using binary), convert('中文' using binary);
select convert(convert('ㅂ' using gbk) using binary), convert('ㅂ' using binary);
drop table if exists t;
create table t(a binary(10));
insert into t values (0xe240), (0x01e240);
set @@tidb_enable_vectorized_expression = true;
select hex(convert(a using gbk)), convert(a using gbk) from t;
set @@tidb_enable_vectorized_expression = false;
select hex(convert(a using gbk)), convert(a using gbk) from t;

-- test for builtin function md5()
drop table if exists t;
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10 changes: 2 additions & 8 deletions expression/builtin_string.go
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Expand Up @@ -1152,14 +1152,8 @@ func (b *builtinConvertSig) evalString(row chunk.Row) (string, bool, error) {
}
// if expr is binary string and convert meet error, we should return NULL.
if types.IsBinaryStr(b.args[0].GetType()) {
target, _, err := transform.String(encoding.NewEncoder(), expr)
if err != nil {
return "", true, err
}

// we should convert target into utf8 internal.
exprInternal, _, _ := transform.String(encoding.NewDecoder(), target)
return exprInternal, false, nil
exprInternal, _, err := transform.String(encoding.NewDecoder(), expr)
return exprInternal, err != nil, nil
}
if types.IsBinaryStr(b.tp) {
enc := charset.NewEncoding(b.args[0].GetType().Charset)
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10 changes: 4 additions & 6 deletions expression/builtin_string_vec.go
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Expand Up @@ -685,7 +685,6 @@ func (b *builtinConvertSig) vecEvalString(input *chunk.Chunk, result *chunk.Colu
if encoding == nil {
return errUnknownCharacterSet.GenWithStackByArgs(b.tp.Charset)
}
encoder := encoding.NewEncoder()
decoder := encoding.NewDecoder()
isBinaryStr := types.IsBinaryStr(b.args[0].GetType())
isRetBinary := types.IsBinaryStr(b.tp)
Expand All @@ -702,13 +701,12 @@ func (b *builtinConvertSig) vecEvalString(input *chunk.Chunk, result *chunk.Colu
}
exprI := expr.GetString(i)
if isBinaryStr {
target, _, err := transform.String(encoder, exprI)
target, _, err := transform.String(decoder, exprI)
if err != nil {
return err
result.AppendNull()
continue
}
// we should convert target into utf8 internal.
exprInternal, _, _ := transform.String(decoder, target)
result.AppendString(exprInternal)
result.AppendString(target)
} else {
if isRetBinary {
str, err := enc.EncodeString(exprI)
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