Show table definitition view in PostgresSQL.

[kyoto7250]

PostgresSQL does not have a function to output table definitions.
Implementations that allow defining a custom function to output table definitions would be welcome.
This stack overflow's post may be helpful.

https://stackoverflow.com/questions/2593803/how-to-generate-the-create-table-sql-statement-for-an-existing-table-in-postgr