types - Query the schema details of a table in PostgreSQL? -


i need know column type in postgresql (i.e. varchar(20)). know find using \d in psql, need done select query.
possible in postgresql?

you can describe table using postgres following query:

select   a.attname column,   pg_catalog.format_type(a.atttypid, a.atttypmod) datatype     pg_catalog.pg_attribute       a.attnum > 0   , not a.attisdropped   , a.attrelid = (     select c.oid     pg_catalog.pg_class c     left join pg_catalog.pg_namespace n on n.oid = c.relnamespace     c.relname ~ '^(tablename)$'    , pg_catalog.pg_table_is_visible(c.oid)   )

tith retrieve column names , data type.

it possible start psql client using -e option

$ psql -e

and simple \d mytable output queries used postgres describe table. work every psql describe commands.


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