Postgres 删除排除约束

Question

I ran this DDL to add an exclusion constraint to a table:

ALTER TABLE recurring_charges
  ADD EXCLUDE USING GIST (period WITH &&);

Now I want to remove the constraint - how do I do that? I tried some variations of ALTER TABLE ... DROP EXCLUDE and DROP CONSTRAINT but nothing seems to work.

Answer 1

Figured it out - looks like it generated a name for the constraint that I have to use.

ALTER TABLE recurring_charges
  DROP CONSTRAINT recurring_charges_period_excl;

And now I've updated my original DDL to use the full ADD CONSTRAINT syntax so that I can name my constraint rather than relying on automatic naming behavior:

ALTER TABLE recurring_charges
  ADD CONSTRAINT recurring_charges_period_excl EXCLUDE USING GIST (period WITH &&);

Answer 2

要添加到上述答案中，要找出约束名称，您可以使用以下命令在 psql 中找到它：

\\d+ tableName