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Fix += decimal error #1266

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Fix += decimal error #1266

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2 changes: 1 addition & 1 deletion be/src/olap/field_info.h
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Original file line number Diff line number Diff line change
Expand Up @@ -149,7 +149,7 @@ struct decimal12_t {
}

// if sign of fraction is different from integer
if ((fraction ^ integer) < 0) {
if ((fraction != 0) && (integer != 0) && (fraction ^ integer) < 0) {
bool sign = integer < 0;
integer += (sign ? 1 : -1);
fraction += (sign ? -FRAC_RATIO : FRAC_RATIO);
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26 changes: 25 additions & 1 deletion be/test/olap/field_info_test.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -21,7 +21,7 @@

namespace doris {

TEST(FieldInfoTest, HandleNoneZeroInput) {
TEST(FieldInfoTest, Add) {
int64_t a_integer = 9223372036854775806L;
int a_fraction = 1;
decimal12_t a(a_integer, a_fraction);
Expand All @@ -36,6 +36,30 @@ TEST(FieldInfoTest, HandleNoneZeroInput) {
a += b;
ASSERT_EQ(-9223372036854775807L, a.integer);
ASSERT_EQ(-1, a.fraction);

a.integer = -1;
a.fraction = 0;
b.integer = -7;
b.fraction = 0;
a += b;
ASSERT_EQ(-8, a.integer);
ASSERT_EQ(0, a.fraction);

a.integer = 0;
a.fraction = -1;
b.integer = 0;
b.fraction = -2;
a +=b;
ASSERT_EQ(0, a.integer);
ASSERT_EQ(-3, a.fraction);

a.integer = 0;
a.fraction = -999999999;
b.integer = 0;
b.fraction = -1;
a += b;
ASSERT_EQ(-1, a.integer);
ASSERT_EQ(0, a.fraction);
}

} // namespace doris
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