On Mon, Jun 25, 2018 at 07:06:06PM +0530, Gaurav Mishra wrote: > here what i expect as a output : > > create extension table_name-extract; > > select extract_tablename(); > > table-name datatype-name > new_table name new > new_table1 name1 new1 > > extract_tablename : this function should give me a table name with > data_type inside contrib module so that i can use in the extension .
It is possible to know what is the set of objects registered within an extension using a lookup to system catalogs. The internal set of queries used by psql is full of good patterns, so why not looking at what psql -E does when using psql shortcuts and build up a query which does what you are looking for? If you filter the set of objects by type (a table), then you can look at pg_attribute and get all the column names you are looking for. There is also not special need to write C code for that. -- Michael
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