JAVA高级面试进阶训练营视频教程

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查询出来的结果>1000条

select vl.UNIT_CODE
from VC_LEVEL vl
where vl.UNIT_TYPE = 0
and vl.VALID_STATUS = 1
and vl.LEVEL_NO <= 3
start with vl.ID_VC_LEVEL = 694
connect by prior vl.ID_VC_LEVEL = vl.PARENT_ORG_ID)；

放进一个list<string>  aa 里面  

select doc.id_vc_doc_version_info,
doc.doc_ver_code,
doc.doc_ver_name,
doc.org_code,
doc.status
from vc_doc_version_info doc
where 1 = 1 and doc.status = '1'
and doc.id_vc_doc_type='1'
and exists (select 1
from vc_doc_rel_area area
where area.id_vc_doc_version_info = doc.id_vc_doc_version_info
and area.org_code in（ aa ）
);

解决方案

sb.append(" and exists(select 1 from VcDocRelArea area where area.idVcDocVersionInfo=doc.idVcDocVersionInfo " );
// sb.append(" and area.orgCode in ( ");
String[] strs1=orgCodeList.toArray(new String[orgCodeList.size()]);

sb.append(createIdsInHqlAllowEmpty(strs1,"area.orgCode"));
sb.append("))");

 

工具类

public static String createIdsInHqlAllowEmpty(String[] ids, String propertyStr) {
if(ids.length<=1000){
String idStr = createIds4Hql(ids);
StringBuffer hqlBuffer = new StringBuffer("");
if (StringUtils.isNotEmpty(idStr)) {
hqlBuffer.append(" and " + propertyStr + " in ").append(idStr);
}
return hqlBuffer.toString();
}else{
StringBuffer hqlBuffer = new StringBuffer("");
hqlBuffer.append(" and ( ");
int num = ids.length/1000;
int remain = ids.length%1000;
for(int i=0;i<=num;i++){
String[] newIds = null;
if(i!=num){
newIds = Arrays.copyOfRange(ids, i*1000, (i+1)*1000);
}else{
newIds = Arrays.copyOfRange(ids, i*1000, i*1000+remain);
}
String idStr = createIds4Hql(newIds);
if (StringUtils.isNotEmpty(idStr)) {
if(i==0){
hqlBuffer.append(propertyStr + " in ").append(idStr);
}else{
hqlBuffer.append(" or " + propertyStr + " in ").append(idStr);
}
}
}
hqlBuffer.append(")");
return hqlBuffer.toString();
}
}
public static String createIds4Hql(String[] ids) {
StringBuffer idBuffer = new StringBuffer("");
String idsHql = null;
StringBuffer hqlBuffer = new StringBuffer("");
if (ids!=null&&ids.length>0) {
for (String id : ids) {
idBuffer.append("'" + id + "',");
}
idsHql = StringUtils.substringBeforeLast(idBuffer.toString(), ",");
hqlBuffer.append(" (").append(idsHql).append(")");
}
return hqlBuffer.toString();
}

 

oracle   数据库一种新发现的写法 这种写法超过1000条也不会报错

SELECT t.* FROM nbz_policy_main t WHERE (t.policyno , 1) in (('1',1),('1',1));