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I need to lowercase array content in PostgreSQL, lower(array['array_content'])) or array[lower('array_content'])) does not work. Actual array is much, much longer.
SELECT * FROM kliendi_aadress WHERE lower(linn) LIKE ANY (array['Tallinn', 'Tartu','Narva'])
Can this even be done?
727
asked Jul 30 '18 08:07
To create a column of an array type, the [] symbol is used. The following examples illustrate this: create table contacts ( first_name varchar, last_name varchar, phone_numbers varchar[] ); create table player_scores ( player_number integer, round_scores integer[] );
We access array elements using the subscript within square brackets [] . By default, PostgreSQL uses one-based numbering for array elements. It means the first array element starts with number 1.
PostgreSQL allows columns of a table to be defined as variable-length multidimensional arrays. Arrays of any built-in or user-defined base type, enum type, composite type, range type, or domain can be created.
PostgreSQL database provides a facility to use arrays in the tables to store the same type of data in the bulk form. Arrays are the type of data that are used to store values of the same data type. PostgreSQL allows the column to store data by using multidimensional arrays.
In order to convert the column to lowercase in postgresql we use LOWER () function. LOWER function in postgresql converts string column to lowercase. Let’s see how to We will be using states table.
Given a particular array (e.g. ['foo','bar','baz'] ), array_lower () returns the position of the first (lowest) element, i.e. the lower array bound, which by default is 1: postgres=# SELECT array_lower (ARRAY ['foo', 'bar', 'baz'], 1); array_lower ------------- 1 (1 row)
ARRAY_LOWER() function. This function is used to return lower bound of the requested array dimension. Syntax: array_lower(anyarray, int) Return Type. int. PostgreSQL Version: 9.3 . Example: PostgreSQL ARRAY_LOWER() function. Code: SELECT array_lower('[0:2]={1,2,3}'::int[], 1); Sample Output: array_lower ----- 0 (1 row)
PostgreSQL allows columns of a table to be defined as variable-length multidimensional arrays. Arrays of any built-in or user-defined base type, enum type, or composite type can be created.
Well ILIKE solved this problem for me
SELECT * FROM kliendi_aadress WHERE linn ILIKE ANY (array['Tallinn', 'Tartu','Narva']);
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