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new c1a03302ece [fix](function) Fix format_round function (#49216)
c1a03302ece is described below
commit c1a03302ecef516a47d562ed21f483610962b873
Author: Tiewei Fang <fangtie...@selectdb.com>
AuthorDate: Tue Mar 18 21:07:54 2025 +0800
[fix](function) Fix format_round function (#49216)
### What problem does this PR solve?
Issue Number: close #xxx
Related PR: #xxx
Problem Summary:
### Release note
None
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- Test <!-- At least one of them must be included. -->
- [ ] Regression test
- [ ] Unit Test
- [ ] Manual test (add detailed scripts or steps below)
- [ ] No need to test or manual test. Explain why:
- [ ] This is a refactor/code format and no logic has been changed.
- [ ] Previous test can cover this change.
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- [ ] Other reason <!-- Add your reason? -->
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- [ ] Yes. <!-- Explain the behavior change -->
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- [ ] No.
- [ ] Yes. <!-- Add document PR link here. eg:
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---
be/src/vec/functions/function_string.h | 16 +++++++++-------
1 file changed, 9 insertions(+), 7 deletions(-)
diff --git a/be/src/vec/functions/function_string.h
b/be/src/vec/functions/function_string.h
index 2dafa1560e7..ab70cc6fe26 100644
--- a/be/src/vec/functions/function_string.h
+++ b/be/src/vec/functions/function_string.h
@@ -3219,12 +3219,12 @@ constexpr size_t MAX_FORMAT_LEN_INT128() {
template <typename T, size_t N>
StringRef do_format_round(FunctionContext* context, UInt32 scale, T int_value,
T frac_value,
- UInt32 decimal_places) {
+ Int32 decimal_places) {
static_assert(std::is_integral<T>::value);
const bool is_negative = int_value < 0 || frac_value < 0;
// do round to frac_part based on decimal_places
- if (scale > decimal_places) {
+ if (scale > decimal_places && decimal_places > 0) {
DCHECK(scale <= 38);
// do rounding, so we need to reserve decimal_places + 1 digits
auto multiplier =
@@ -3233,7 +3233,7 @@ StringRef do_format_round(FunctionContext* context,
UInt32 scale, T int_value, T
// after round frac_value will be positive by design
frac_value = std::abs(static_cast<int>(frac_value / multiplier)) + 5;
frac_value /= 10;
- } else if (scale < decimal_places) {
+ } else if (scale < decimal_places && decimal_places > 0) {
// since scale <= decimal_places, overflow is impossible
frac_value = frac_value * common::exp10_i32(decimal_places - scale);
}
@@ -3258,8 +3258,8 @@ StringRef do_format_round(FunctionContext* context,
UInt32 scale, T int_value, T
char* p = SimpleItoaWithCommas(int_value, local, sizeof(local));
const Int32 integer_str_len = N - (p - local);
const Int32 frac_str_len = decimal_places;
- const Int32 whole_decimal_str_len =
- (append_sign_manually ? 1 : 0) + integer_str_len + 1 +
frac_str_len;
+ const Int32 whole_decimal_str_len = (append_sign_manually ? 1 : 0) +
integer_str_len +
+ (decimal_places > 0 ? 1 : 0) +
frac_str_len;
StringRef result = context->create_temp_string_val(whole_decimal_str_len);
char* result_data = const_cast<char*>(result.data);
@@ -3269,7 +3269,9 @@ StringRef do_format_round(FunctionContext* context,
UInt32 scale, T int_value, T
}
memcpy(result_data + (append_sign_manually ? 1 : 0), p, integer_str_len);
- *(result_data + whole_decimal_str_len - (frac_str_len + 1)) = '.';
+ if (decimal_places > 0) {
+ *(result_data + whole_decimal_str_len - (frac_str_len + 1)) = '.';
+ }
// Convert fractional part to string with proper padding
T remaining_frac = std::abs(static_cast<int>(frac_value));
@@ -3282,7 +3284,7 @@ StringRef do_format_round(FunctionContext* context,
UInt32 scale, T int_value, T
// Note string value must be valid decimal string which contains two digits
after the decimal point
static StringRef do_format_round(FunctionContext* context, const string& value,
- UInt32 decimal_places) {
+ Int32 decimal_places) {
bool is_positive = (value[0] != '-');
int32_t result_len =
value.size() +
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