tp or查询

字段为a，下面可查询a=10，a=14的数据：

$where['a'] = array(14,10,'or');

字段为a,b，可查询a=10或b=10的数据

$where['a|b'] = array('eq','10');

复合查询

$condition['a'] = 10;

$condition['b'] = 12;

$condition['_logic'] = "and";

$map['_complex']=$condition;

$map['a']=15;

$map['_logic']='or';