我正在尝试使用以下测试代码测试新的 PostgreSQL upsert 语法,但得到语法错误:
test=> CREATE TABLE test1 (
test(> key1 integer PRIMARY KEY check (key1 > 0),
test(> key2 integer check (key2 > 0)
test(> );
CREATE TABLE
test=> CREATE OR REPLACE FUNCTION upsert(IN in_json_array jsonb)
test-> RETURNS void AS
test-> $func$
test$> UPDATE test1 t SET
test$> t.key1 = (obj->>'key1')::int,
test$> t.key2 = (obj->>'key2')::int
test$> FROM JSONB_ARRAY_ELEMENTS(in_json_array) obj
test$> WHERE t.key1 = obj->'key1'
test$> ON CONFLICT DO UPDATE SET
test$> key1 = excluded.key1,
test$> key2 = excluded.key2;
test$>
test$> $func$ LANGUAGE sql;
ERROR: syntax error at or near "ON"
LINE 9: ON CONFLICT DO UPDATE SET
^
请问上面的代码为什么会失败?
此外,该test1
表有几个约束(非负值和唯一主键)。如何仅解决唯一性约束?
更新 2:我已经从 to 切换UPDATE
到INSERT
(对不起这个愚蠢的错误!),但我仍然在语法上苦苦挣扎:
test=> CREATE OR REPLACE FUNCTION upsert(IN in_json_array jsonb)
test-> RETURNS void AS
test-> $func$
test$> INSERT into test1 AS t (t.key1, t.key2)
test$> VALUES ((obj->>'key1')::int, (obj->>'key2')::int)
test$> FROM JSONB_ARRAY_ELEMENTS(in_json_array) obj
test$> WHERE t.key1 = obj->'key1'
test$> ON CONFLICT DO UPDATE SET
test$> t.key1 = excluded.key1,
test$> t.key2 = excluded.key2;
test$> $func$ LANGUAGE sql;
ERROR: syntax error at or near "FROM"
LINE 6: FROM JSONB_ARRAY_ELEMENTS(in_json_array) obj
^
我还尝试将 JSON 行更改为:
SELECT obj FROM JSONB_ARRAY_ELEMENTS(in_json_array)
但这也失败了......
为方便起见,这是我的测试代码:
select upsert('[{"key1":1,"key2":2},{"key1":3,"key2":4}]'::jsonb);
select upsert('[{"key1":1,"key2":2},{"key1":1,"key2":4}]'::jsonb);