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Merge pull request #6956 from taosdata/hotfix/td-5431-master 

[TD-5431]<fix>:taken into accout data length when compare nchar bytes
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Haojun Liao 2021-07-23 11:58:02 +08:00 committed by GitHub
parent b170a07253 b6edb74b3b
commit 9c23c91870
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GPG Key ID: 4AEE18F83AFDEB23
1 changed files with 11 additions and 4 deletions
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15
src/query/src/qExtbuffer.c
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@ -378,11 +378,18 @@ static FORCE_INLINE int32_t columnValueAscendingComparator(char *f1, char *f2, i
};
case TSDB_DATA_TYPE_NCHAR: { // todo handle the var string compare
int32_t ret = tasoUcs4Compare(f1, f2, bytes);
if (ret == 0) {
return 0;
int32_t len1 = varDataLen(f1);
int32_t len2 = varDataLen(f2);
if (len1 != len2) {
return len1 > len2 ? 1 : -1;
} else {
int32_t ret = tasoUcs4Compare(varDataVal(f1), varDataVal(f2), len1);
if (ret == 0) {
return 0;
}
return (ret < 0) ? -1 : 1;
}
return (ret < 0) ? -1 : 1;
};
case TSDB_DATA_TYPE_UTINYINT: DEFAULT_COMP(GET_UINT8_VAL(f1), GET_UINT8_VAL(f2));
case TSDB_DATA_TYPE_USMALLINT: DEFAULT_COMP(GET_UINT16_VAL(f1), GET_UINT16_VAL(f2));