--------------- Domains in PSQL --------------- Function: Allow usage of domains in PSQL. Author: Adriano dos Santos Fernandes <adrianosf@uol.com.br> Syntax rules: data_type ::= <builtin_data_type> | <domain_name> | TYPE OF <domain_name> | TYPE OF COLUMN <table or view>.<column> Examples: CREATE DOMAIN DOM AS INTEGER; CREATE PROCEDURE SP (I1 TYPE OF DOM, I2 DOM) RETURNS (O1 TYPE OF DOM, O2 DOM) AS DECLARE VARIABLE V1 TYPE OF DOM; DECLARE VARIABLE V2 DOM; BEGIN END Notes: 1. TYPE OF gets only the type of the domain. It doesn't use constraints and default values. 2. A new field RDB$VALID_BLR was added in RDB$RELATIONS and RDB$TRIGGERS to store if the procedure/trigger is valid or not after an ALTER DOMAIN. 3. The value of RDB$VALID_BLR is shown in ISQL commands SHOW PROCEDURE/TRIGGER. See also: README.column_type_psql.txt