Postgresql string contains substring code#
But, when I find myself embedding another language into the code for nearly every solution, thats when I start asking if I'm missing a bigger picture. Keeping it as simple as I can has worked out pretty well so far and this works as is for now.
For those who are well dug into the SQL world am I missing out on something by doing this? I get it for speed but if speed is ever an issue, I would assume that I just need to rewrite the implementation in C. Use the Posix Regular Operators to SELECT if String Contains a Substring Match in PostgreSQL. The second thing is, this isn't the first time I've thrown together some python snippet to bring more of a pythonic mentality to the database. Use the substring () Function to SELECT if String Contains a Substring Match in PostgreSQL.
Postgresql string contains substring how to#
This works and should stop me from asking, but I would really prefer to learn how the SQL world would solve this because the whole point of learning SQL was to learn how to work the database instead of just finding another way to mold python to recreate a nosql feel. SELECT title FROM snippets WHERE contains(description,'Evil')='TRUE' * contains function here */ĬREATE FUNCTION contains (input_text text, target text) RETURNS text AS $$ I wrote an inline python function that returns a 'TRUE' or 'FALSE' to make the following work. SELECT title FROM snippets WHERE description CONTAINS 'evil' SELECT title FROM snippets WHERE 'evil' in description In the database that I'm currently building, logically, I'm inclined to believe that the SQL command would look a bit like this if I were trying to show all of the snippet titles that contained 'evil' in the description. PostgreSQL also has a substring function, but the syntax is different than what you’re probably used to. It’s a great way to trim your string down to a specific value or identify if one string is a part of the current string.
First a simple "contains" based search where the python equivalent would be something like: def find_all_containing( input_array=, target ): Substring functions let you extract one string from another string. Return Value The POSITION () function returns an integer that represents the location of the substring within the string. 2) string The string argument is the string for which the substring is searched. Im new to the PostgreSQL world so I do apologize in advance for not knowing if there is an obvious answer to these questions.īasically I'm looking for two things. 1) substring The substring argument is the string that you want to locate.
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