Hi, John et al, On Wed, May 10, 2017 at 11:02 PM, John R Pierce <pierce@xxxxxxxxxxxx> wrote: > On 5/10/2017 7:45 PM, Igor Korot wrote: >> >> I found >> this:https://wiki.postgresql.org/wiki/Retrieve_primary_key_columns, >> but now I need >> to connect this with information_schema.columns. >> >> What is best way to do it? >> >> Or maybe that query I referenced is completely wrong? > > > > if you're using pg_catalog stuff there's little point in using the > information_schema views, which exist for compatability with the SQL > standard. > > information_schema.columns is a view, like... Like I said, what I expect to see from the query is: id | integer | | 5| 2 | 0 | P | name | varchar | 50| 2 | | | | <NULL> So I need the information about the field and whether the field is a primary/foreign key or not. And this is according to the schema.table. Thank you. > > View definition: > SELECT current_database()::information_schema.sql_identifier AS > table_catalog, > nc.nspname::information_schema.sql_identifier AS table_schema, > c.relname::information_schema.sql_identifier AS table_name, > a.attname::information_schema.sql_identifier AS column_name, > a.attnum::information_schema.cardinal_number AS ordinal_position, > pg_get_expr(ad.adbin, ad.adrelid)::information_schema.character_data AS > column_default, > CASE > WHEN a.attnotnull OR t.typtype = 'd'::"char" AND t.typnotnull > THEN 'NO'::text > ELSE 'YES'::text > END::information_schema.yes_or_no AS is_nullable, > CASE > WHEN t.typtype = 'd'::"char" THEN > CASE > WHEN bt.typelem <> 0::oid AND bt.typlen = (-1) THEN > 'ARRAY'::text > WHEN nbt.nspname = 'pg_catalog'::name THEN > format_type(t.typbasetype, NULL::integer) > ELSE 'USER-DEFINED'::text > END > ELSE > CASE > WHEN t.typelem <> 0::oid AND t.typlen = (-1) THEN > 'ARRAY'::text > WHEN nt.nspname = 'pg_catalog'::name THEN > format_type(a.atttypid, NULL::integer) > ELSE 'USER-DEFINED'::text > END > END::information_schema.character_data AS data_type, > information_schema._pg_char_max_length(information_schema._pg_truetypid(a.*, > t.*), information_schema._pg_truetypmod(a.*, > t.*))::information_schema.cardinal_numb > er AS character_maximum_length, > information_schema._pg_char_octet_length(information_schema._pg_truetypid(a.*, > t.*), information_schema._pg_truetypmod(a.*, > t.*))::information_schema.cardinal_nu > mber AS character_octet_length, > information_schema._pg_numeric_precision(information_schema._pg_truetypid(a.*, > t.*), information_schema._pg_truetypmod(a.*, > t.*))::information_schema.cardinal_nu > mber AS numeric_precision, > information_schema._pg_numeric_precision_radix(information_schema._pg_truetypid(a.*, > t.*), information_schema._pg_truetypmod(a.*, t.*))::information_schema.cardi > nal_number AS numeric_precision_radix, > information_schema._pg_numeric_scale(information_schema._pg_truetypid(a.*, > t.*), information_schema._pg_truetypmod(a.*, > t.*))::information_schema.cardinal_number > AS numeric_scale, > information_schema._pg_datetime_precision(information_schema._pg_truetypid(a.*, > t.*), information_schema._pg_truetypmod(a.*, > t.*))::information_schema.cardinal_n > umber AS datetime_precision, > information_schema._pg_interval_type(information_schema._pg_truetypid(a.*, > t.*), information_schema._pg_truetypmod(a.*, > t.*))::information_schema.character_data > AS interval_type, > NULL::integer::information_schema.cardinal_number AS interval_precision, > NULL::character varying::information_schema.sql_identifier AS > character_set_catalog, > NULL::character varying::information_schema.sql_identifier AS > character_set_schema, > NULL::character varying::information_schema.sql_identifier AS > character_set_name, > CASE > WHEN nco.nspname IS NOT NULL THEN current_database() > ELSE NULL::name > END::information_schema.sql_identifier AS collation_catalog, > nco.nspname::information_schema.sql_identifier AS collation_schema, > co.collname::information_schema.sql_identifier AS collation_name, > CASE > WHEN t.typtype = 'd'::"char" THEN current_database() > ELSE NULL::name > END::information_schema.sql_identifier AS domain_catalog, > CASE > WHEN t.typtype = 'd'::"char" THEN nt.nspname > ELSE NULL::name > END::information_schema.sql_identifier AS domain_schema, > CASE > WHEN t.typtype = 'd'::"char" THEN t.typname > ELSE NULL::name > END::information_schema.sql_identifier AS domain_name, > current_database()::information_schema.sql_identifier AS udt_catalog, > COALESCE(nbt.nspname, nt.nspname)::information_schema.sql_identifier AS > udt_schema, > COALESCE(bt.typname, t.typname)::information_schema.sql_identifier AS > udt_name, > NULL::character varying::information_schema.sql_identifier AS > scope_catalog, > NULL::character varying::information_schema.sql_identifier AS > scope_schema, > NULL::character varying::information_schema.sql_identifier AS > scope_name, > NULL::integer::information_schema.cardinal_number AS > maximum_cardinality, > a.attnum::information_schema.sql_identifier AS dtd_identifier, > 'NO'::character varying::information_schema.yes_or_no AS > is_self_referencing, > 'NO'::character varying::information_schema.yes_or_no AS is_identity, > NULL::character varying::information_schema.character_data AS > identity_generation, > NULL::character varying::information_schema.character_data AS > identity_start, > NULL::character varying::information_schema.character_data AS > identity_increment, > NULL::character varying::information_schema.character_data AS > identity_maximum, > NULL::character varying::information_schema.character_data AS > identity_minimum, > NULL::character varying::information_schema.yes_or_no AS identity_cycle, > 'NEVER'::character varying::information_schema.character_data AS > is_generated, > NULL::character varying::information_schema.character_data AS > generation_expression, > CASE > WHEN c.relkind = 'r'::"char" OR (c.relkind = ANY > (ARRAY['v'::"char", 'f'::"char"])) AND > pg_column_is_updatable(c.oid::regclass, a.attnum, false) THEN 'YE > S'::text > ELSE 'NO'::text > END::information_schema.yes_or_no AS is_updatable > FROM pg_attribute a > LEFT JOIN pg_attrdef ad ON a.attrelid = ad.adrelid AND a.attnum = > ad.adnum > JOIN (pg_class c > JOIN pg_namespace nc ON c.relnamespace = nc.oid) ON a.attrelid = c.oid > JOIN (pg_type t > JOIN pg_namespace nt ON t.typnamespace = nt.oid) ON a.atttypid = t.oid > LEFT JOIN (pg_type bt > JOIN pg_namespace nbt ON bt.typnamespace = nbt.oid) ON t.typtype = > 'd'::"char" AND t.typbasetype = bt.oid > LEFT JOIN (pg_collation co > JOIN pg_namespace nco ON co.collnamespace = nco.oid) ON a.attcollation > = co.oid AND (nco.nspname <> 'pg_catalog'::name OR co.collname <> > 'default'::name) > WHERE NOT pg_is_other_temp_schema(nc.oid) AND a.attnum > 0 AND NOT > a.attisdropped AND (c.relkind = ANY (ARRAY['r'::"char", 'v'::"char", > 'f'::"char"])) AND (pg_has_ > role(c.relowner, 'USAGE'::text) OR has_column_privilege(c.oid, a.attnum, > 'SELECT, INSERT, UPDATE, REFERENCES'::text)); > > > > -- > john r pierce, recycling bits in santa cruz > > > > > -- > Sent via pgsql-general mailing list (pgsql-general@xxxxxxxxxxxxxx) > To make changes to your subscription: > http://www.postgresql.org/mailpref/pgsql-general -- Sent via pgsql-general mailing list (pgsql-general@xxxxxxxxxxxxxx) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-general
