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[TD-5484]<fix>:nchar/binary tag length exceed limit error when alter table

This commit is contained in:
shenglian zhou 2021-07-23 14:19:19 +08:00
parent c82eecddd0
commit 1d77a5b0d1
1 changed files with 4 additions and 5 deletions
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9
src/query/src/qSqlParser.c
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@ -712,9 +712,8 @@ void tSetColumnType(TAOS_FIELD *pField, SStrToken *type) {
} else {
int32_t bytes = -(int32_t)(type->type);
if (bytes > (TSDB_MAX_NCHAR_LEN - VARSTR_HEADER_SIZE) / TSDB_NCHAR_SIZE) {
// we have to postpone reporting the error because it cannot be done here
// as pField->bytes is int16_t, use 'TSDB_MAX_NCHAR_LEN + 1' to avoid overflow
bytes = TSDB_MAX_NCHAR_LEN + 1;
// overflowed. set bytes to -1 so that error can be reported
bytes = -1;
} else {
bytes = bytes * TSDB_NCHAR_SIZE + VARSTR_HEADER_SIZE;
}
@ -727,8 +726,8 @@ void tSetColumnType(TAOS_FIELD *pField, SStrToken *type) {
} else {
int32_t bytes = -(int32_t)(type->type);
if (bytes > TSDB_MAX_BINARY_LEN - VARSTR_HEADER_SIZE) {
// refer comment for NCHAR above
bytes = TSDB_MAX_BINARY_LEN + 1;
// overflowed. set bytes to -1 so that error can be reported
bytes = -1;
} else {
bytes += VARSTR_HEADER_SIZE;
}