/TypeScript/View all foreign key constraints postgres

View all foreign key constraints postgres

Postgres check for foreign key

SELECT
    r.table_name
FROM information_schema.constraint_column_usage       u
INNER JOIN information_schema.referential_constraints fk
           ON u.constraint_catalog = fk.unique_constraint_catalog
               AND u.constraint_schema = fk.unique_constraint_schema
               AND u.constraint_name = fk.unique_constraint_name
INNER JOIN information_schema.key_column_usage        r
           ON r.constraint_catalog = fk.constraint_catalog
               AND r.constraint_schema = fk.constraint_schema
               AND r.constraint_name = fk.constraint_name
WHERE
    u.column_name = 'id' AND
    u.table_catalog = 'db_name' AND
    u.table_schema = 'public' AND
    u.table_name = 'table_a'

Source: stackoverflow.com

View all foreign key constraints postgres

SELECT
    tc.table_schema, 
    tc.constraint_name, 
    tc.table_name, 
    kcu.column_name, 
    ccu.table_schema AS foreign_table_schema,
    ccu.table_name AS foreign_table_name,
    ccu.column_name AS foreign_column_name 
FROM 
    information_schema.table_constraints AS tc 
    JOIN information_schema.key_column_usage AS kcu
      ON tc.constraint_name = kcu.constraint_name
      AND tc.table_schema = kcu.table_schema
    JOIN information_schema.constraint_column_usage AS ccu
      ON ccu.constraint_name = tc.constraint_name
      AND ccu.table_schema = tc.table_schema
WHERE tc.constraint_type = 'FOREIGN KEY' AND tc.table_name='mytable';

Source: stackoverflow.com

Similar codes

1 vote263 views1 answer
Two plots side by side r
TypeScript
0 vote265 views1 answer
Property does not exist on type 'DefaultRootState'
TypeScript
189 votes313 views27 answers
Reduce javascript
TypeScript
0 vote247 views1 answer
Get n random elements from list java
TypeScript
0 vote255 views1 answer
Push and array of objects to firebase
TypeScript
0 vote246 views1 answer
Economic tracking portfolio construction
TypeScript
0 vote260 views2 answers
Python combine two lists into matrix
TypeScript
0 vote259 views1 answer
While converting HTML 4 elements to HTML 5 semantic elements, <div class="post"> will be converted into
TypeScript
21 votes309 views6 answers
Ngclass angular
TypeScript
53 votes425 views4 answers
Digits of pi
TypeScript