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https://issues.apache.org/jira/browse/HIVE-15743?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Teddy Choi updated HIVE-15743:
------------------------------
Attachment: HIVE-15743.4.patch
This patch applies Sergey's feedback. It uses a trimed string for precision
check, and limits strtod(String) for testing only.
> vectorized text parsing: speed up double parse
> ----------------------------------------------
>
> Key: HIVE-15743
> URL: https://issues.apache.org/jira/browse/HIVE-15743
> Project: Hive
> Issue Type: Bug
> Reporter: Sergey Shelukhin
> Assignee: Teddy Choi
> Attachments: HIVE-15743.1.patch, HIVE-15743.2.patch,
> HIVE-15743.3.patch, HIVE-15743.4.patch, tpch-without.png
>
>
> {noformat}
> Double.parseDouble(
> new String(bytes, fieldStart, fieldLength,
> StandardCharsets.UTF_8));{noformat}
> This takes ~25% of the query time in some cases.
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