[DOCS] case-insensitive index lower() - Mailing list pgsql-docs

From loren.szendre@gmail.com
Subject [DOCS] case-insensitive index lower()
Date
Msg-id 20161220100242.25618.66302@wrigleys.postgresql.org
Whole thread Raw
Responses Re: [DOCS] case-insensitive index lower()  (Bruce Momjian <bruce@momjian.us>)
List pgsql-docs
The following documentation comment has been logged on the website:

Page: https://www.postgresql.org/docs/9.1/static/sql-createindex.html
Description:

In the section on indexes the documentation accurately describes how to
create an efficient, case-insensitive index using lower(field_name). But! in
Firebird to get a query to utilize such index, you must write the query as
such:

WHERE myfield = lower(:myfield)

Otherwise a table scan is performed. The documentation should state whether
or not such a thing is required. It's one thing to create an index, it's
quite another to know how to write a statement that guarantees that the
index will be used.

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