不能用?| 操作员。适用于 postgresql 9.1.9(开发),在 9.2.4(生产)上失败
test=# SELECT 'a=>1,b=>2'::hstore ?| ARRAY['b','c'];
ERROR: operator does not exist: hstore ?| text[]
LINE 1: SELECT 'a=>1,b=>2'::hstore ?| ARRAY['b','c'];
^
HINT: No operator matches the given name and argument type(s). You might need to add explicit type casts.
hstore 已安装
test=# create extension hstore;
ERROR: type "hstore" already exists