CREATE TABLE IF NOT EXISTS project_bind ( id serial constraint "project_bind_pk" primary key, axy_project_id integer, structure_id integer ); comment on column project_bind.axy_project_id is '安心云项目id'; comment on column project_bind.structure_id is '巡检的结构物id'; comment on column project_bind.axy_project_id is '安心云结构物'; alter table project_bind alter column axy_project_id type varchar(300) using axy_project_id::varchar(300);