What is default collation in PostgreSQL?
The default collation selects the LC_COLLATE and LC_CTYPE values specified at database creation time. The C and POSIX collations both specify “traditional C” behavior, in which only the ASCII letters “A” through “Z” are treated as letters, and sorting is done strictly by character code byte values.
How do I change the default collation in PostgreSQL?
You cannot change default collation of an existing database. You need to CREATE DATABASE with the collation you need and then dump/restore your schema and data into it. If you do not want to recreate the database – you can specify collation for every text collumn in your db.
What is database default collation?
SQL Server instance level collation A SQL Server instance collation is the default collation for the system databases. It includes master, tempdb and model.
When to change the default collation in PostgreSQL?
Locale support is initialized when the database is created. After that, you can no longer change the locale, because the default collation selects LC_COLLATE and LC_CTYPE values are specified at database creation time. Appropriate language settings are defined in the below subcategories.
When to use stripped collation names in PostgreSQL?
Use of the stripped collation names is recommendable, since it will make one less thing you need to change if you decide to change to another database encoding. Note however that the default, C, and POSIX collations can be used regardless of the database encoding.
Which is the default collation of an expression?
If the expression is a constant, the collation is the default collation of the data type of the constant. The collation of a more complex expression is derived from the collations of its inputs, as described below. The collation of an expression can be the “default” collation, which means the locale settings defined for the database.
When to use indeterminate collation in PostgreSQL?
If there are conflicting non-default implicit collations among the input expressions, then the combination is deemed to have indeterminate collation. This is not an error condition unless the particular function being invoked requires knowledge of the collation it should apply.