问微搭低代码数据源where查询条件如何写and\or多条件组合？

放在数组中的条件默认为and的关系，如何表示或的关系，尝试了如下写法不通过

"where": [

or([{"key" : "creatSig", "rel" : "eq","val" : cursig}, {"key" : "endSig", "rel" : "eq","val" : cursig}]),

{"key" : "creatSig", "rel" : "eq","val" : cursig},

{"key" : "ISFinished", "rel" : "eq","val" : params.isFinished},

{"key" : "IsMatched", "rel" : "eq","val" : params.isMatched},

{"key" : "BuildingNo", "rel" : "eq","val" : curbuildingno}

]