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https://issues.apache.org/jira/browse/BEAM-9198?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17039304#comment-17039304
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Rui Wang edited comment on BEAM-9198 at 2/18/20 6:10 PM:
---------------------------------------------------------
There are many analytic functions, I will suggest to start from one single
function, e.g. rank(), but aim at supporting the full functional syntax first:
{code:sql}
analytic_function_name ( [ argument_list ] )
OVER (
[ PARTITION BY partition_expression_list ]
[ ORDER BY expression [{ ASC | DESC }] [, ...] ]
[ window_frame_clause ]
)
{code}
By doing so you will be able to touch many concepts in distributed computing.
E.g. per key computing, sorting, etc.
was (Author: amaliujia):
There are many analytic functions, I will suggest to start from one single
function, e.g. rank(), but aim at supporting the full functional syntax first:
{code:sql}
analytic_function_name ( [ argument_list ] )
OVER (
[ PARTITION BY partition_expression_list ]
[ ORDER BY expression [{ ASC | DESC }] [, ...] ]
[ window_frame_clause ]
)
{code}
> BeamSQL aggregation analytics functions
> ----------------------------------------
>
> Key: BEAM-9198
> URL: https://issues.apache.org/jira/browse/BEAM-9198
> Project: Beam
> Issue Type: Task
> Components: dsl-sql
> Reporter: Rui Wang
> Priority: Major
> Labels: gsoc, gsoc2020, mentor
>
> BeamSQL has a long list of of aggregation/aggregation analytics
> functionalities to support.
> To begin with, you will need to support this syntax:
> {code:sql}
> analytic_function_name ( [ argument_list ] )
> OVER (
> [ PARTITION BY partition_expression_list ]
> [ ORDER BY expression [{ ASC | DESC }] [, ...] ]
> [ window_frame_clause ]
> )
> {code}
> This will requires touch core components of BeamSQL:
> 1. SQL parser to support the syntax above.
> 2. SQL core to implement physical relational operator.
> 3. Distributed algorithms to implement a list of functions in a distributed
> manner.
> 4. Build benchmarks to measure performance of your implementation.
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