Postgresql 中文操作指南

37.34. referential_constraints #

视图 referential_constraints 包含当前数据库中的所有引用（外键）约束。只显示当前用户对引用表具有写访问权限的那些约束（通过所有者或具有 SELECT 以外的某些权限）。

The view referential_constraints contains all referential (foreign key) constraints in the current database. Only those constraints are shown for which the current user has write access to the referencing table (by way of being the owner or having some privilege other than SELECT).

Table 37.32. referential_constraints Columns

Column Type

Description

constraint_catalog sql_identifier

Name of the database containing the constraint (always the current database)

constraint_schema sql_identifier

Name of the schema containing the constraint

constraint_name sql_identifier

Name of the constraint

unique_constraint_catalog sql_identifier

Name of the database that contains the unique or primary key constraint that the foreign key constraint references (always the current database)

unique_constraint_schema sql_identifier

Name of the schema that contains the unique or primary key constraint that the foreign key constraint references

unique_constraint_name sql_identifier

Name of the unique or primary key constraint that the foreign key constraint references

match_option character_data

Match option of the foreign key constraint: FULL, PARTIAL, or NONE.

update_rule character_data

Update rule of the foreign key constraint: CASCADE, SET NULL, SET DEFAULT, RESTRICT, or NO ACTION.

delete_rule character_data

Delete rule of the foreign key constraint: CASCADE, SET NULL, SET DEFAULT, RESTRICT, or NO ACTION.