Amazon Redshift
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<div>Hackers,<br/>
<br/>
do you think we should implement some of the functions offered by Amazon Redshift?</div>
<div> </div>
<div>http://docs.aws.amazon.com/redshift/latest/dg/c_SQL_functions.html</div>
<div> </div>
<div>Amazon Redshift is completely based on PostgreSQL, but they have implemented some features not currently available in PostgreSQL.<br/>
Given the fact that it's a successful customer-driven commercial project, one can easily guess that the functions they implemented are useful and requested by many users.</div>
<div> </div>
<div>Phil</div>
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philip taylor <philtay51@mail.com> wrote:
do you think we should implement some of the functions offered by
Amazon Redshift?http://docs.aws.amazon.com/redshift/latest/dg/c_SQL_functions.html
Well, obviously we already have many of the functions linked from
that page. I think that if you want to go through them and pick
out a few that you think are particularly promising it could start
a useful discussion. Pointing at a page that includes such things
as CURRENT_DATE, the avg() aggregate, and the lead() window
function is just going to waste the time of everyone who follows
the link. It's not like all of them would be committed in the same
patch anyway.
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On 11/5/14, 3:42 PM, Kevin Grittner wrote:
philip taylor <philtay51@mail.com> wrote:
do you think we should implement some of the functions offered by
Amazon Redshift?http://docs.aws.amazon.com/redshift/latest/dg/c_SQL_functions.html
Well, obviously we already have many of the functions linked from
that page. I think that if you want to go through them and pick
out a few that you think are particularly promising it could start
a useful discussion. Pointing at a page that includes such things
as CURRENT_DATE, the avg() aggregate, and the lead() window
function is just going to waste the time of everyone who follows
the link. It's not like all of them would be committed in the same
patch anyway.
At the risk stating the obvious, before we look at implementing them we should see if Amazon would donate that effort.
But as Kevin said, first step is discussion on what we don't have and whether we want it.
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do you think we should implement some of the functions offered by
Amazon Redshift?http://docs.aws.amazon.com/redshift/latest/dg/c_SQL_functions.html
Well, obviously we already have many of the functions linked from
that page. I think that if you want to go through them and pick
out a few that you think are particularly promising it could start
a useful discussion. Pointing at a page that includes such things
as CURRENT_DATE, the avg() aggregate, and the lead() window
function is just going to waste the time of everyone who follows
the link. It's not like all of them would be committed in the same
patch anyway.At the risk stating the obvious, before we look at implementing them we should see if Amazon would donate that effort.
But as Kevin said, first step is discussion on what we don't have and whether we want it.
Ok, this is a summary of what they have that we don't (of course, I could have missed something):
Date Functions
http://docs.aws.amazon.com/redshift/latest/dg/r_ADD_MONTHS.html
http://docs.aws.amazon.com/redshift/latest/dg/r_DATEADD_function.html
http://docs.aws.amazon.com/redshift/latest/dg/r_DATEDIFF_function.html
http://docs.aws.amazon.com/redshift/latest/dg/r_LAST_DAY.html
http://docs.aws.amazon.com/redshift/latest/dg/r_MONTHS_BETWEEN_function.html
http://docs.aws.amazon.com/redshift/latest/dg/r_NEXT_DAY.html
String Functions
http://docs.aws.amazon.com/redshift/latest/dg/REGEXP_COUNT.html
http://docs.aws.amazon.com/redshift/latest/dg/REGEXP_INSTR.html
http://docs.aws.amazon.com/redshift/latest/dg/r_STRTOL.html
http://docs.aws.amazon.com/redshift/latest/dg/crc32-function.html
http://docs.aws.amazon.com/redshift/latest/dg/FUNC_SHA1.html
JSON Functions
http://docs.aws.amazon.com/redshift/latest/dg/JSON_ARRAY_LENGTH.html
http://docs.aws.amazon.com/redshift/latest/dg/JSON_EXTRACT_ARRAY_ELEMENT_TEXT.html
http://docs.aws.amazon.com/redshift/latest/dg/JSON_EXTRACT_PATH_TEXT.html
Window functions
http://docs.aws.amazon.com/redshift/latest/dg/r_WF_RATIO_TO_REPORT.html
http://docs.aws.amazon.com/redshift/latest/dg/r_WF_MEDIAN.html
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On 11/05/2014 02:36 PM, philip taylor wrote:
Ok, this is a summary of what they have that we don't (of course, I could have missed something):
I can't see any functions on that list I'd want.
For example, DATEADD is there just to be compatible with MSSQL. It's
useless to us.
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On Wed, Nov 5, 2014 at 5:36 PM, philip taylor <philtay51@mail.com> wrote:
do you think we should implement some of the functions offered by
Amazon Redshift?http://docs.aws.amazon.com/redshift/latest/dg/c_SQL_functions.html
JSON Functions
http://docs.aws.amazon.com/redshift/latest/dg/JSON_ARRAY_LENGTH.html
http://docs.aws.amazon.com/redshift/latest/dg/JSON_EXTRACT_PATH_TEXT.html
We actually have the two above:
http://www.postgresql.org/docs/current/static/functions-json.html
Actually, if you look at the examples you will see they only copy ours
and changed the values a little.
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On 11/05/2014 11:36 PM, philip taylor wrote:
String Functions
http://docs.aws.amazon.com/redshift/latest/dg/FUNC_SHA1.html
http://www.postgresql.org/docs/9.3/static/pgcrypto.html
(not really a string function imho)
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--On 5. November 2014 23:36:03 +0100 philip taylor <philtay51@mail.com>
wrote:
Date Functions
http://docs.aws.amazon.com/redshift/latest/dg/r_ADD_MONTHS.html
http://docs.aws.amazon.com/redshift/latest/dg/r_DATEADD_function.html
http://docs.aws.amazon.com/redshift/latest/dg/r_DATEDIFF_function.html
http://docs.aws.amazon.com/redshift/latest/dg/r_LAST_DAY.html
http://docs.aws.amazon.com/redshift/latest/dg/r_MONTHS_BETWEEN_function.h
tml http://docs.aws.amazon.com/redshift/latest/dg/r_NEXT_DAY.html
fyi, except DATE_DIFF() all of these functions can be installed by using
the orafce extension i believe.
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Thanks
Bernd
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