Lele Gaifax <lele@xxxxxxxxxxxxxxx> writes: > while writing test cases for my SQL pretty printer tool[1], I found what seems > a discrepancy in the "Type Casts" documentation[2]: it states that the two > syntaxes are equivalent, but while They are functionally equivalent ... > EXCLUDE USING gist (CAST(company_id AS text) WITH =, validity WITH &&) > works, the following > EXCLUDE USING gist (company_id::text WITH =, validity WITH &&) > is rejected with the message "syntax error at or near "::"". ... but expression-index syntax has the restriction that you need parentheses around an expression unless it is, or at least looks like, a function call. CAST() looks enough like a function call for this purpose, v::t does not. I think there is relevant documentation for this near CREATE INDEX; it doesn't seem like the province of the typecast docs to explain the weirdnesses of index syntax. regards, tom lane -- Sent via pgsql-general mailing list (pgsql-general@xxxxxxxxxxxxxx) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-general
