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https://issues.apache.org/jira/browse/DRILL-4864?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Serge Harnyk updated DRILL-4864:
--------------------------------
Description:
The TO_DATE() is exposing the Joda string formatting conventions into the SQL
layer. This is not following SQL conventions used by ANSI and many other
database engines on the market.
Add new UDF "ansi_to_joda(string)", that takes string that represents ANSI
datetime format and returns string that represents equal Joda format.
Add new session option "drill.exec.fn.to_date_format" that can be one of two
values - "JODA"(default) and "ANSI".
If option is set to "JODA" queries with to_date() function would work in usual
way.
If option is set to "ANSI" second argument would be wrapped with ansi_to_joda()
function, that allows user to use ANSI datetime format
Wrapping is used in to_date(), to_time() and to_timestamp() functions.
|| Pattern name || Ansi format || JodaTime format ||
| FULL NAME OF DAY | day | EEEE |
| DAY OF YEAR | ddd | D |
| DAY OF MONTH | dd | d |
| DAY OF WEEK | d | e |
| NAME OF MONTH | month | MMMM |
| ABR NAME OF MONTH | mon | MMM |
| FULL ERA NAME | ee | G |
| NAME OF DAY | dy | E |
| TIME ZONE | tz | TZ |
| HOUR 12 | hh | h |
| HOUR 12 | hh12 | h |
| HOUR 24 | hh24 | H |
| MINUTE OF HOUR | mi | m |
| SECOND OF MINUTE | ss | s |
| MILLISECOND OF MINUTE | ms | S |
| WEEK OF YEAR | ww | w |
| MONTH | mm | MM |
| HALFDAY AM | am | aa |
| HALFDAY PM | pm | aa |
| ref. |
https://www.postgresql.org/docs/8.2/static/functions-formatting.html |
http://www.joda.org/joda-time/apidocs/org/joda/time/format/DateTimeFormat.html
|
was:
The TO_DATE() is exposing the Joda string formatting conventions into the SQL
layer. This is not following SQL conventions used by ANSI and many other
database engines on the market.
Add new UDF "ansi_to_joda(string)", that takes string that represents ANSI
datetime format and returns string that represents equal Joda format.
Add new session option "drill.exec.fn.to_date_format" that can be one of two
values - "JODA"(default) and "ANSI".
If option is set to "JODA" queries with to_date() function would work in usual
way.
If option is set to "ANSI" second argument would be wrapped with ansi_to_joda()
function, that allows user to use ANSI datetime format
Wrapping is used in to_date(), to_time() and to_timestamp() functions.
> Add ANSI format for date/time functions
> ---------------------------------------
>
> Key: DRILL-4864
> URL: https://issues.apache.org/jira/browse/DRILL-4864
> Project: Apache Drill
> Issue Type: Improvement
> Affects Versions: 1.8.0
> Reporter: Serge Harnyk
> Assignee: Serge Harnyk
> Fix For: 1.9.0
>
> Attachments: jodatime_ansi.odt
>
>
> The TO_DATE() is exposing the Joda string formatting conventions into the SQL
> layer. This is not following SQL conventions used by ANSI and many other
> database engines on the market.
> Add new UDF "ansi_to_joda(string)", that takes string that represents ANSI
> datetime format and returns string that represents equal Joda format.
> Add new session option "drill.exec.fn.to_date_format" that can be one of two
> values - "JODA"(default) and "ANSI".
> If option is set to "JODA" queries with to_date() function would work in
> usual way.
> If option is set to "ANSI" second argument would be wrapped with
> ansi_to_joda() function, that allows user to use ANSI datetime format
> Wrapping is used in to_date(), to_time() and to_timestamp() functions.
> || Pattern name || Ansi format || JodaTime format ||
> | FULL NAME OF DAY | day | EEEE |
> | DAY OF YEAR | ddd | D |
> | DAY OF MONTH | dd | d |
> | DAY OF WEEK | d | e |
> | NAME OF MONTH | month | MMMM |
> | ABR NAME OF MONTH | mon | MMM |
> | FULL ERA NAME | ee | G |
> | NAME OF DAY | dy | E |
> | TIME ZONE | tz | TZ |
> | HOUR 12 | hh | h |
> | HOUR 12 | hh12 | h |
> | HOUR 24 | hh24 | H |
> | MINUTE OF HOUR | mi | m |
> | SECOND OF MINUTE | ss | s |
> | MILLISECOND OF MINUTE | ms | S |
> | WEEK OF YEAR | ww | w |
> | MONTH | mm | MM |
> | HALFDAY AM | am | aa |
> | HALFDAY PM | pm | aa |
> | ref. |
> https://www.postgresql.org/docs/8.2/static/functions-formatting.html |
>
> http://www.joda.org/joda-time/apidocs/org/joda/time/format/DateTimeFormat.html
> |
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