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https://issues.apache.org/jira/browse/ARROW-6073?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Micah Kornfield resolved ARROW-6073.
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Resolution: Fixed
Fix Version/s: 1.0.0
Issue resolved by pull request 4970
[https://github.com/apache/arrow/pull/4970]
> [C++] Decimal128Builder is not reset in Finish()
> ------------------------------------------------
>
> Key: ARROW-6073
> URL: https://issues.apache.org/jira/browse/ARROW-6073
> Project: Apache Arrow
> Issue Type: Bug
> Components: C++
> Affects Versions: 0.14.1
> Reporter: Kenneth Jung
> Priority: Minor
> Labels: pull-request-available
> Fix For: 1.0.0
>
> Time Spent: 20m
> Remaining Estimate: 0h
>
> Repro:
> {code:java|title=decimal128-builder_test.cc|borderStyle=solid}
> TEST(ArrowDecimal128BuilderTest, TestResetAfterFinish) {
> auto type = std::make_shared<::arrow::Decimal128Type>(4, 4);
> auto builder = std::make_shared<::arrow::Decimal128Builder>(type);
> std::shared_ptr<::arrow::Array> out;
> ASSERT_OK(builder->Append("1"));
> ASSERT_OK(builder->Finish(&out));
> ASSERT_OK(builder->Append("2"));
> ASSERT_OK(builder->Finish(&out));
> ASSERT_EQ(out->length(), 1);
> }
> {code}
> Output:
> {{ Expected equality of these values:}}
> {{ out->length()}}
> {{ Which is: 2}}
> {{ 1}}
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