I tried to do this as an edit, but the edit was rejected as being too small. The problem you're running into is a misunderstanding of plpgsql's (somewhat confusing) block syntax.If you look on that page, the critical part you're missing is this: Example - Declaring a variable. character type in postgresql . Add a Solution < > & [^] … ? for ex: let the variable be: recordvar. I will define the columname in a variable: var := columnname. So it's not entirely clear what you are … – mu is too short Mar 5 '15 at 20:35 The delimiter character is usually a comma (,) but can be something else: it is determined by the typdelim setting for the array's element type. columnname. There are some issues related to implementation and simple and good enough solution is ignore this type feature - the expected behave is simple with varchar, but can be pretty difficult to design correct and user friendly behave for numeric types. There are two SQL bit types: bit(n) and bit varying(n), where n is a positive integer. Variable initialization timing. From historical reasons PostgreSQL ignore size modificator in function argument type (typmod). Bit String Type. Text Search Type. recordvar. DECLARE variablename character varying; Permalink Posted 1-Mar-16 1:14am. This type supports full text search, which is the activity of searching through a collection of natural-language documents to locate those that best match a query. Below is an example of how to declare a variable in PostgreSQL called vSite.. the type does not require character length. PostgreSQL has a rich set of native data types available to users. Both of these types can store strings up to n characters (not bytes) in length. amit.agarwal8609. character varying(n), varchar(n) = variable-length with limit; character(n), char(n) = fixed-length, blank padded; text = variable unlimited length; based on your problem I suggest you to use type text. Among the standard data types provided in the PostgreSQL distribution, all use a comma, except for type box, which uses a semicolon (;). You cannot declare a variable in plain SQL like this. DECLARE vSite varchar; This example would declare a variable called vSite as a varchar data type.. You can then later set or change the value of the vSite variable, as follows:. In place of columnname if I replace with the variable i.e. gives the value of the column name specified. Users can add new types to PostgreSQL using the CREATE TYPE command. The counter variable is an integer that is initialized to 1. Bit String Types are used to store bit masks. I am newbie to postgresql. ... You can declare the variable by the following line in your procedure/function. Using PostgreSQL, column values from a table for 1st record are stored in a record variable. They are either 0 or 1. I have to declare variable inside a function for internal calculation. vSite := 'TechOnTheNet.com'; I have a Postgres schema which looks like: The problem is that whenever I save text longer than 500 characters in the description column I get the error: value too long for type character varying(500) In the documentation for Postgres it says type text can have unlimited characters. PostgreSQL evaluates the default value of a variable and assigns it to the variable when the block is entered. @DaoLam: From the documentation I liked to: "The result of a SQL command yielding a single row (possibly of multiple columns) can be assigned to a record variable, row-type variable, or list of scalar variables." Most of the alternative names listed in the "Aliases" column are the names used internally by PostgreSQL for historical reasons. The type of payment is numeric and its value is initialized to 20.5. Table 8-4 shows the general-purpose character types available in PostgreSQL.. 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