I want to do this:
CREATE FUNCTION ean_checkdigit(bpchar, bpchar) RETURNS BOOLEAN AS '/usr1/proj/bray/sql/funcs.so' LANGUAGE 'C';
CREATE TABLE product ( id CHAR(10) PRIMARY KEY, brand CHAR(12) REFERENCES
brandname(id) ON UPDATE CASCADE
ON DELETE NO ACTION, eancode CHAR(6) CHECK (eancode IS NULL
OReancode ~ '[0-9]{6}'), ...,
CONSTRAINT ean CHECK ( CASE WHEN eancode IS NULL OR brand IS NULL THEN 't' ELSE ean_checkdigit(
(SELECT ean_prefix FROM brandname, product WHERE brandname.id =
product.brand ), eancode) END )
);
The parser accepts it, but when it is run on a line that matches the ELSE in the constraint, I get:
copy product from '/usr1/avoca/dumps/dbdump.product'
ERROR: copy: line 2, ExecEvalExpr: unknown expression type 108
Can this be made to work at all (in 7.0.2)?
--
Oliver Elphick Oliver.Elphick@lfix.co.uk
Isle of Wight http://www.lfix.co.uk/oliver
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======================================== "I waited patiently for the LORD; and he inclined unto me, and heard my
cry.He brought me up also out of an horrible pit, out of the miry clay, and set my feet upon a rock, and
establishedmy goings." Psalms 40:1,2