Rails + PostgreSQL -Using Like

问题:

I have the following two queries:

SELECT users.* FROM "users" WHERE (fname || lname LIKE '%james%')  SELECT users.* FROM "users" WHERE (fname || lname LIKE '%James%') 

I have a record in the User Table with fname = James

The problem I'm having is the first query returns 0 results, and the 2nd returns the correct result.

I want the LIKE to be case insensitive. Ideas? Thanks

回答1:

SELECT users.* FROM "users" WHERE (fname || lname ILIKE '%james%')

ILIKE = case-insenstive LIKE. Note that this is specific to PostgreSQL, and not a SQL standard.

回答2:

Try using

  SELECT users.* FROM "users" WHERE (fname || lname ILIKE '%james%') 

Notice the 'I' in LIKE

回答3:

Queries with "LIKE" or "ILIKE" are pretty slow, especially for tables with many entries. I think it would be faster if you use the full text search ability of PostgreSQL.

PostgreSQL textsearch docs

文章来源: Rails + PostgreSQL -Using Like