#Sqlite regex case insensitive full#

If you want only part of the regex to be case insensitive (as my original. Nearly all regex engines support it: /G a-b./i string.match ('G a-b.', 'i') Check the documentation for your language/platform/tool to find how the matching modes are specified. Limit specify the max number of records to retrieve Assuming you want the whole regex to ignore case, you should look for the i flag. SELECT * FROM users ORDER BY FIELD(id,1,2,3) When the destination object has a primary value, the primary key will be used to build the condition, for example: var user = User, If the primary key is a string (for example, like a uuid), the query will be written as follows: db.First(&user, 'id = ?', '1b74413f-f3b8-409f-ac47-e8c062e3472a') SELECT * FROM users WHERE id IN (1,2,3) When working with strings, extra care needs to be taken to avoid SQL Injection check out Security section for details. Objects can be retrieved using primary key by using Inline Conditions if the primary key is a number. SELECT * FROM `languages` ORDER BY `languages`.`code` LIMIT 1 no primary key defined, results will be ordered by first field (i.e., `Code`) works because model is specified using `db.Model()` SELECT * FROM `users` ORDER BY `users`.`id` LIMIT 1 works because destination struct is passed in Additionally, if no primary key is defined for relevant model, then the model will be ordered by the first field. They only work when a pointer to the destination struct is passed to the methods as argument or when the model is specified using db.Model(). The First and Last methods will find the first and last record (respectively) as ordered by primary key.

#Sqlite regex case insensitive full#

Using Find without a limit for single object db.Find(&user) will query the full table and return only the first object which is not performant and nondeterministic If you want to avoid the ErrRecordNotFound error, you could use Find like db.Limit(1).Find(&user), the Find method accepts both struct and slice data Result.RowsAffected // returns count of records foundĮrrors.Is(result.Error, gorm.ErrRecordNotFound) SELECT * FROM users ORDER BY id DESC LIMIT 1 Get last record, ordered by primary key desc SELECT * FROM users ORDER BY id LIMIT 1 Get the first record ordered by primary key It only supports one write operation at a time and stores all data on a single file, so it’s a better choice for single-user devices and small-scale test scenarios than for systems that need to support many concurrent writers or contain large amounts of data.įor applications that need to work at a larger scale, other database management systems such as PostgreSQL, MariaDB, or MySQL are more suitable.GORM provides First, Take, Last methods to retrieve a single object from the database, it adds LIMIT 1 condition when querying the database, and it will return the error ErrRecordNotFound if no record is found. here is MySQL REGEXPREPLACE() syntax: REGEXPREPLACE. SQLite is an open source database engine intended to provide lightweight and efficient databases for small-scale applications. By default, The REGEXPREPLACE() function performs case-insensitive matching. For example, SELECT my_function(name) FROM products. If you called create_function('my_function', 1), you would use my_function(arg) directly in your SQL expressions.

SQLite maps expression REGEXP pattern to regexp(pattern, expression) for compatibility with other database management systems, so you can use either format in your SQL expressions.įor new functions that you create, you can call them just as you defined them. match ( matcher ) ? 1 : 0 end end end end Calling user-defined SQLite functions to_s, Regexp :: IGNORECASE ) # Return 1 if expression matches our regex, 0 otherwise fn. create_function ( 'regexp', 2 ) do | fn, pattern, expr | # Ignore case in our regex expressions matcher = Regexp. is_a? SQLite3 :: Database # Set up function to provide SQLite REGEXP support connection. class_eval do alias_method :orig_initialize, :initialize # Extend database initialization to add our own functions def initialize ( connection, logger = nil, pool = nil ) orig_initialize ( connection, logger, pool ) # Initializer for SQLite3 databases if connection. # /config/initializers/database_functions.rb ActiveRecord :: ConnectionAdapters :: AbstractAdapter.