NEN - NPR-ISO/IEC/TR 19075-1
Information technology - Database languages - SQL Technical Reports - Part 1: XQuery Regular Expression Support in SQL
| Organization: | NEN |
| Publication Date: | 1 August 2011 |
| Status: | inactive |
| Page Count: | 36 |
| ICS Code (Languages used in information technology): | 35.060 |
scope:
This Technical Report describes the regular expression support in SQL adopted from the regular expression syntax of [XQuery F&O], which is derived from Perl. This Technical Report discusses five operators using this regular expression syntax: - LIKE_REGEX predicate, to determine the existence of a match to a regular expression. - OCCURRENCES_REGEX numeric function, to determine the number of matches to a regular expression. - POSITION_REGEX function, to determine the position of a match. - SUBSTRING_REGEX function, to extract a substring matching a regular expression. - TRANSLATE_REGEX function, to perform replacements using a regular expression.
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