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https://issues.apache.org/jira/browse/FLINK-9432?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16627310#comment-16627310
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ASF GitHub Bot commented on FLINK-9432:
---------------------------------------
pnowojski commented on a change in pull request #6614: [FLINK-9432] [table]
Support extract timeunit: DECADE, EPOCH, ISODOW, ISOYEAR…
URL: https://github.com/apache/flink/pull/6614#discussion_r220175187
##########
File path:
flink-libraries/flink-table/src/main/java/org/apache/calcite/avatica/util/DateTimeUtils.java
##########
@@ -719,7 +724,13 @@ public static long timestampStringToUnixDate(String s) {
}
public static long unixDateExtract(TimeUnitRange range, long date) {
- return julianExtract(range, (int) date + EPOCH_JULIAN);
+ switch (range) {
+ case EPOCH:
+ // no need to extract year/month/day, just
multiply
+ return date * SECONDS_PER_DAY;
+ default:
+ return julianExtract(range, (int) date +
EPOCH_JULIAN);
+ }
}
private static int julianExtract(TimeUnitRange range, int julian) {
Review comment:
I'm a little bit worried about the `julian` thing in this method name... I
have a bad feeling that it supposed to be Gregorian calendar here...
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> Support extract epoch, decade, millisecond, microsecond
> -------------------------------------------------------
>
> Key: FLINK-9432
> URL: https://issues.apache.org/jira/browse/FLINK-9432
> Project: Flink
> Issue Type: New Feature
> Reporter: Sergey Nuyanzin
> Assignee: Sergey Nuyanzin
> Priority: Major
> Labels: pull-request-available
>
> The task is to separate activity from depending on
> https://issues.apache.org/jira/browse/CALCITE-2303 from all others that could
> be done without upgrade avatica/calcite in
> https://issues.apache.org/jira/browse/FLINK-8518
> Now the implementations of next functions are blocked
> {code:sql}
> extract(decade from ...)
> extract(epoch from ...)
> extract(millisecond from ...)
> extract(microsecond from ...)
> extract(isodow from ...)
> extract(isoyear from ...)
> {code}
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