"Vladimir Kokovic" <vladimir.koko...@a-asoft.com> writes:
> For ALTER TABLE ADD CONSTRAINT documentation says:
> ADD table_constraint
> This form adds a new constraint to a table using the same syntax as
> CREATE TABLE.
> But if expression is used in the constraint definition
> server says:
> # ALTER TABLE asoft_finansije.gk_promene ADD CONSTRAINT vk2
> UNIQUE((substring(broj,10)),id)
> asoft-# ;
> ERROR: 42601: syntax error at or near "("
> LINE 1: ...ft_finansije.gk_promene ADD CONSTRAINT vk2 UNIQUE((substring...
> ^
Yeah, if you tried writing that in CREATE TABLE, it would complain too.
> Create index is OK:
> *# CREATE UNIQUE INDEX vk2 on
> adefault_finansije.gk_promene((substring(broj,10)),id);
> CREATE INDEX
This is not a CONSTRAINT clause in a CREATE TABLE.
regards, tom lane
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