For example:
CREATE TABLE tb(name varchar(32));
According to pg_class, pg_attribute, pg_type, I can get the tablename,
column name, column type
however, how to get the length of columns of a table by system tables/views?
Thanks!
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SELECT a.attname, pg_catalog.format_type(a.atttypid, a.atttypmod)
FROM pg_catalog.pg_attribute a
WHERE a.attrelid = (SELECT pg_class.oid
FROM pg_class INNER JOIN pg_namespace
ON (pg_class.relnamespace = pg_namespace.oid
AND
which friend knows?
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