ALTER DOMAIN

<< CREATE DOMAIN | FB 2.5 Language Reference | EXCEPTION >>

ALTER DOMAIN

Available in: DSQL, ESQL

Warning: If a domain's definition is changed, existing PSQL code using that domain may become invalid. For information on how to detect this, please read the note The RDB$VALID_BLR field, near the end of this document.

Rename domain

Added in: IB

Description

Renaming of a domain is possible with the TO clause. This feature was introduced in InterBase 6, but left out of the Language Reference.

Example 

 alter domain posint to plusint
  • The TO clause can be combined with other clauses and need not come first in that case.

SET DEFAULT to any context variable

Changed in: IB

Description

Any context variable that is assignment-compatible to the domain's datatype can be used as a default. This was already the case in InterBase 6, but the Language Reference only mentioned USER.

Example 

 alter domain DDate
   set default current_date

See also:
Create a domain
ALTER TABLE
CREATE TABLE
DROP DOMAIN
DDL - Data Definition Language

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