The catalog pg_policy stores row level security policies for tables. A policy includes the kind of command that it applies to (possibly all commands), the roles that it applies to, the expression to be added as a security-barrier qualification to queries that include the table, and the expression to be added as a WITH CHECK option for queries that attempt to add new records to the table.
Table 51.38. pg_policy Columns
Name
Type
References
Description
polname
name
The name of the policy
polrelid
oid
.oid
The table to which the policy applies
polcmd
char
The command type to which the policy is applied: r for SELECT, a for INSERT, w for UPDATE, d for DELETE, or * for all
polpermissive
boolean
Is the policy permissive or restrictive?
polroles
oid[]
.oid
The roles to which the policy is applied
polqual
pg_node_tree
The expression tree to be added to the security barrier qualifications for queries that use the table
polwithcheck
pg_node_tree
The expression tree to be added to the WITH CHECK qualifications for queries that attempt to add rows to the table
Policies stored in pg_policy are applied only when pg_class.relrowsecurity is set for their table.