Question

I need to do a query that search for a text with ‘Nome % teste \ / ‘ as prefix. I’m doing the query using:

where ‘name’ ILIKE ‘Nome a% teste \ /%’ ESCAPE ‘a’ (using a as escape character).

There is a row that match this, but this query returns nothing. Removing the slash (‘Nome % teste \’), it works. But I don’t see why the slash is a problem, since the default escape is a backslash and I’ve changed it to ‘a’ in this test.

There is something that I’m missing? (I’ve consulted TFM)

Answer 1

Use the ‘ESCAPE’ specifier

WHERE 'name' ILIKE 'Nome ~% teste \\/' ESCAPE '~'  

http://www.postgresql.org/docs/8.2/static/functions-matching.html

Note: you still need to have the \ twice for the string parser.

Without the ESCAPE you would need to do

WHERE 'name' ILIKE 'Nome \% test \\\\/'  

( 4 \ ‘s to represent one literal \ )

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Thanks, but I still have the original issue with the slash. Searching with

WHERE 'name' ILIKE 'Nome \% test \\\\/%'  

don’t give me a result, while

WHERE 'name' ILIKE 'Nome \% test \\\\%'  

(removed the slash, that is present in the row) works as expected. – Kknd

its possible your string does not have a literal ‘/’ like you specified. you possibly have a null, or other whitespace character inbetween. Or possibly, you have / in a different character set.

I would attempt to use this to test for that possible scenario

 WHERE 'name' ILIKE 'Nome \% ' AND 'name' ~* '\\.{1,10}/'  

which will return lines that have / separated by something( but not lines with no separation )