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Posted to issues@spark.apache.org by "Takeshi Yamamuro (Jira)" <ji...@apache.org> on 2019/12/29 00:36:00 UTC
[jira] [Updated] (SPARK-28325) Support ANSI SQL:SIMILAR TO ...
ESCAPE syntax
[ https://issues.apache.org/jira/browse/SPARK-28325?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Takeshi Yamamuro updated SPARK-28325:
-------------------------------------
Parent Issue: SPARK-30374 (was: SPARK-27764)
> Support ANSI SQL:SIMILAR TO ... ESCAPE syntax
> ---------------------------------------------
>
> Key: SPARK-28325
> URL: https://issues.apache.org/jira/browse/SPARK-28325
> Project: Spark
> Issue Type: Sub-task
> Components: SQL
> Affects Versions: 3.0.0
> Reporter: jiaan.geng
> Priority: Major
>
> {code:java}
> <similar predicate> ::=
> <row value predicand> <similar predicate part 2>
> <similar predicate part 2> ::=
> [ NOT ] SIMILAR TO <similar pattern> [ ESCAPE <escape character> ]
> <similar pattern> ::=
> <character value expression>
> <regular expression> ::=
> <regular term>
> | <regular expression> <vertical bar> <regular term>
> <regular term> ::=
> <regular factor>
> | <regular term> <regular factor>
> <regular factor> ::=
> <regular primary>
> | <regular primary> <asterisk>
> | <regular primary> <plus sign>
> | <regular primary> <question mark>
> | <regular primary> <repeat factor>
> <repeat factor> ::=
> <left brace> <low value> [ <upper limit> ] <right brace>
> <upper limit> ::=
> <comma> [ <high value> ]
> <low value> ::=
> <unsigned integer>
> <high value> ::=
> <unsigned integer>
> <regular primary> ::=
> <character specifier>
> | <percent>
> | <regular character set>
> | <left paren> <regular expression> <right paren>
> <character specifier> ::=
> <non-escaped character>
> | <escaped character>
> <non-escaped character> ::=
> !! See the Syntax Rules.
> 494 Foundation (SQL/Foundation)
> CD 9075-2:201?(E)
> 8.6 <similar predicate>
> <escaped character> ::=
> !! See the Syntax Rules.
> <regular character set> ::=
> <underscore>
> | <left bracket> <character enumeration>... <right bracket>
> | <left bracket> <circumflex> <character enumeration>... <right bracket>
> | <left bracket> <character enumeration include>...
> <circumflex> <character enumeration exclude>... <right bracket>
> <character enumeration include> ::=
> <character enumeration>
> <character enumeration exclude> ::=
> <character enumeration>
> <character enumeration> ::=
> <character specifier>
> | <character specifier> <minus sign> <character specifier>
> | <left bracket> <colon> <regular character set identifier> <colon> <right bracket>
> <regular character set identifier> ::=
> <identifier>{code}
>
> Examples:
> {code}
> SELECT 'abc' RLIKE '%(b|d)%'; // false
> SELECT 'abc' SIMILAR TO '%(b|d)%' // true
> SELECT 'abc' RLIKE '(b|c)%'; // false
> SELECT 'abc' SIMILAR TO '(b|c)%'; // false{code}
>
> Currently, the following DBMSs support the syntax:
> * PostgreSQL:[https://www.postgresql.org/docs/current/functions-matching.html#FUNCTIONS-SIMILARTO-REGEXP]
> * Redshift: [https://docs.aws.amazon.com/redshift/latest/dg/pattern-matching-conditions-similar-to.html]
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