您需要通过运行以下查询来检索表名:
SELECT *
FROM information_schema.constraint_table_usage
WHERE table_name = 'your_table'
或者，您可以使用pg_constraint来检索此信息
select n.nspname as schema_name,
t.relname as table_name,
c.conname as constraint_name
from pg_constraint c
join pg_class t on c.conrelid = t.oid
join pg_namespace n on t.relnamespace = n.oid
where t.relname = 'your_table_name';
然后可以运行所需的ALTER TABLE语句:
ALTER TABLE your_table DROP CONSTRAINT constraint_name;
当然，您可以让查询返回完整的alter语句:
SELECT 'ALTER TABLE '||table_name||' DROP CONSTRAINT '||constraint_name||';'
FROM information_schema.constraint_table_usage
WHERE table_name in ('your_table', 'other_table')
如果有多个模式具有相同的表，不要忘记在WHERE子句(和ALTER语句)中包含table_模式.