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 COLLATIONComments 

ALTER CHARACTER SET

Sets the default collation of a character set

Available in

DSQL

Syntax
ALTER CHARACTER SET charset
  SET DEFAULT COLLATION collation
Table 1. ALTER CHARACTER SET Statement Parameters
Parameter Description

charset

Character set identifier

collation

The name of the collation

This will affect the future usage of the character set, except for cases where the COLLATE clause is explicitly overridden.In that case, the collation of existing domains, columns and PSQL variables will remain intact after the change to the default collation of the underlying character set.

Note

If you change the default collation for the database character set (the one defined when the database was created), it will change the default collation for the database.

If you change the default collation for the character set that was specified during the connection, string constants will be interpreted according to the new collation value, except in those cases where the character set and/or the collation have been overridden.

Who Can Alter a Character Set

The ALTER CHARACTER SET statement can be executed by:

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ALTER CHARACTER SET Example

Setting the default UNICODE_CI_AI collation for the UTF8 encoding
ALTER CHARACTER SET UTF8
  SET DEFAULT COLLATION UNICODE_CI_AI;