How do I extract following meta information from a psql table. column_name, data_type, char_max_length,numeric_precision,constraint_type, constraint_reference, check_clause .In short the information that we have got by this query "\d table_name".
extracting meta info from a table psql using information_schema
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psqlwith the-Eflag, and take note of the queries it generates when you issue\d table_name-- you'll need to reproduce many or most of those queries in order to get all the metadata you're asking for.