/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

0 vote133 views1 answer
Use multy line in typescript
TypeScript
12 votes147 views3 answers
Python count number of digits in integer
TypeScript
1 vote152 views1 answer
Running scripts is disabled on this system nodemon
TypeScript
0 vote131 views1 answer
Extending a type in typescript
TypeScript
1 vote130 views1 answer
Mongoose removed empty objects
TypeScript
0 vote141 views2 answers
Ts class
TypeScript
1 vote142 views1 answer
Adding paragraphs with foreach in angular docx.js
TypeScript
0 vote129 views1 answer
Vulnerability of systems is divided into two (2) categories. List the two (2) categories.
TypeScript
0 vote172 views1 answer
For loop of unlimited inputs python
TypeScript
0 vote136 views1 answer
Why to choose automation over manual testing
TypeScript