Find dependent objects for a table or view Stack Overflow
When dropping or replacing objects in PostgreSQL if there are dependencies the drop will fail without specifying CASCADE Problem The error message returned by the database does not list the dependent objects Example Solution The query might look something like
Pg depend display PostgreSQL wiki, Click here Pg depend display From PostgreSQL wiki Jump to navigation Jump to search Administrative Snippets Dependency display Works with PostgreSQL Written in SQL Depends on See also http archives postgresql pgsql hackers 2011 01 msg00894 php
Where to find object dependencies in Postgresql pg depend
Refobjid oid any OID column The OID of the specific referenced object You have to interpret that in combinatioin with refclassid oid pg class oid The OID of the system catalog the referenced object is in A shortcut to find out about that is the cast to regclass SELECT refclassid regclass AS referenced class FROM pg depend WHERE objid
Tracking view dependencies in PostgreSQL CYBERTEC, We all know that in PostgreSQL we cannot drop an object if there are view dependencies on it 1 2 3 4 5 6 7 8 9 10 11 12 13 CREATE TABLE t id integer PRIMARY KEY CREATE VIEW v AS SELECT FROM t DROP TABLE t ERROR cannot drop table t because other objects depend on it DETAIL view v depends on table t HINT Use DROP
Pg depend pgPedia a PostgreSQL Encyclopedia
Pg depend pgPedia a PostgreSQL Encyclopedia, Pg depend is a system catalogue table recording dependencies between database objects to ensure dropping one object leads to dependent objects being dropped or the drop operation being blocked depending on how the relationship between objects is defined pg depend was added in PostgreSQL 7 3 together with pg constraint replacing pg relcheck
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PostgreSQL Documentation 11 52 18 pg depend
PostgreSQL Documentation 11 52 18 pg depend Example a table column has a normal dependency on its data type DEPENDENCY AUTO a The dependent object can be dropped separately from the referenced object and should be automatically dropped regardless of RESTRICT or CASCADE mode if the referenced object is dropped
How Can I Make My Upstart Service Depend On PostgreSQL YouTube
In all cases a pg depend entry indicates that the referenced object cannot be dropped without also dropping the dependent object However there are several subflavors identified by deptype DEPENDENCY NORMAL n A normal relationship between separately created objects The dependent object can be dropped without affecting the referenced object PostgreSQL Documentation 14 52 18 pg depend. Using the pg depend Catalog to find Dependent Objects The pg depend catalog contains a record of all object relationships in a PostgreSQL database This catalog is used by DROP commands to find and delete related objects and can be used to check what will be deleted before doing so You can view a list of all PostgreSQL object dependencies A normal relationship between separately created objects The dependent object can be dropped without affecting the referenced object The referenced object can only be dropped by specifying CASCADE in which case the dependent object is dropped too Example a table column has a normal dependency on its data type
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