CREATE SERVER fdtest FOREIGN DATA WRAPPER postgresql OPTIONS (hostaddr 127.0.0.1, dbname contribregression).CREATE Consumer MAPPING FOR dblinkregressiontest Machine fdtest Choices (user dblinkregressiontest, security password key).
![]() ![]() SELECT FROM dbIink(myconn,SELECT FR0M foo) AS testosterone levels(a int, t text, chemical text message). REVOKE USAGE ON FOREIGN Machine fdtest FROM dblinkregressiontest. If not found, the very first argument is treated as a link info chain as for dbIinkconnect, and the indicatéd connection is produced just for the length of time of this control. If fake, the remote error is usually locally documented as a NOTICE, and the functionality profits no rows. Since dblink can be utilized with any concern, it is certainly announced to return record, instead than specifying any particular place of columns. This means that you must specify the expected set of columns in the calling query normally PostgreSQL would not really know what to expect. At operate time, an error will become thrown if the actual query outcome from the remote database will not have got the exact same amount of columns proven in the FROM clause. The column titles need not really match, however, and dblink will not persist on specific type fits either. It will be successful so very long as the came back data strings are valid insight for the column type announced in the FROM terms. This enables the line type information to be buried in the see, instead of having to mean it out in every issue. SELECT FROM dblink(myconn, go for proname, prosrc from pgproc).
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