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https://issues.apache.org/jira/browse/SPARK-14361?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Xin Wu updated SPARK-14361:
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Issue Type: New Feature (was: Improvement)
> Support EXCLUDE clause in Window function framing
> -------------------------------------------------
>
> Key: SPARK-14361
> URL: https://issues.apache.org/jira/browse/SPARK-14361
> Project: Spark
> Issue Type: New Feature
> Components: SQL
> Affects Versions: 2.0.0
> Reporter: Xin Wu
>
> The current Spark SQL does not support the exclusion clause in Window
> function framing, which is part of ANSI SQL2003’s Window syntax. For example,
> IBM Netezza fully supports it as shown in the
> https://www.ibm.com/support/knowledgecenter/SSULQD_7.1.0/com.ibm.nz.dbu.doc/c_dbuser_window_aggregation_family_syntax.html).
> We propose to implement it in this JIRA..
> The ANSI SQL2003's Window Syntax:
> {code}
> FUNCTION_NAME(expr) OVER {window_name | (window_specification)}
> window_specification ::= [window_name] [partitioning] [ordering] [framing]
> partitioning ::= PARTITION BY value[, value...] [COLLATE collation_name]
> ordering ::= ORDER [SIBLINGS] BY rule[, rule...]
> rule ::= {value | position | alias} [ASC | DESC] [NULLS {FIRST | LAST}]
> framing ::= {ROWS | RANGE} {start | between} [exclusion]
> start ::= {UNBOUNDED PRECEDING | unsigned-integer PRECEDING | CURRENT ROW}
> between ::= BETWEEN bound AND bound
> bound ::= {start | UNBOUNDED FOLLOWING | unsigned-integer FOLLOWING}
> exclusion ::= {EXCLUDE CURRENT ROW | EXCLUDE GROUP | EXCLUDE TIES | EXCLUDE
> NO OTHERS}
> {code}
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