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