Sql输出：312 Sql脚本内部联接：
SELECT count(*) FROM COST_TYPE_SELECTION CST
LEFT JOIN GBL_HYPACCT_RSLV_TBL_NEW_CA GBL
ON GBL.TREE_NODE = CST.GL_TREE_NODE
AND GBL.TREE_LEVEL = CST.GL_TREE_LEVEL
LEFT JOIN DIM_HYP_PCCODE_FLATTEN DIM
ON CST.PC_TREE_LEVEL = DIM.TREE_LEVEL
AND CST.PC_TREE_NODE = DIM.TREE_LEVEL_NODE
AND DIM.LEGAL_ENTITY='007'
AND DIM.PC_CODE='0200'
and CST.COST_TYPE='Direct_Expenses'
INNER JOIN EPM_CONSOLIDATED_LEDGER_M EPM
ON EPM.LEGAL_ENTITY = DIM.LEGAL_ENTITY
AND EPM.gl_profit_centre_cd = DIM.PC_CODE
AND EPM.GL_ACCOUNT_NUMBER = GBL.TREE_LEAF
WHERE EPM.sourcedataloccd='SG'
Jdbc脚本1：将GLaccount存储在arraylist Gllishive中
SELECT GBL.TREE_LEAF FROM COST_TYPE_SELECTION CST
LEFT JOIN GBL_HYPACCT_RSLV_TBL_NEW_CA GBL
ON GBL.TREE_NODE = CST.GL_TREE_NODE
AND GBL.TREE_LEVEL = CST.GL_TREE_LEVEL
LEFT JOIN DIM_HYP_PCCODE_FLATTEN DIM
ON CST.PC_TREE_LEVEL = DIM.TREE_LEVEL
AND CST.PC_TREE_NODE = DIM.TREE_LEVEL_NODE
AND DIM.LEGAL_ENTITY='007'
AND DIM.PC_CODE='0200'
Jdbc脚本2：将GLaccount存储在arraylist GllistMaria中
select gl_account from EPM_CONSOLIDATED_LEDGER_M EPM
ON EPM.LEGAL_ENTITY ='007' AND EPM.gl_profit_centre_cd = '7482'
WHERE EPM.sourcedataloccd='SG'
然后比较下面的使用代码
System.out.println("size of hive: " + Gllishive.size());
System.out.println("size of maria join: " + GllistMaria.size());
List<String> joins = new ArrayList<String>(GllistMaria);
joins.retainAll(Gllishive);
System.out.println("after retailall: " + joins.size());
ArrayList<String> MatchingGL = new ArrayList<String>();
for(int i=0;i<GllistMaria.size();i++){
if(Gllishive.contains(GllistMaria.get(i))){
MatchingGL.add(GllistMaria.get(i));
}
}
System.out.println("after contains using for loop :"+MatchingGL);
我得到的输出：873中既保留了所有内容又包含了与SQL输出不匹配的方法：312
在下面填写代码
public void Script1(String ss) {
try{
String consolm = "SELECT * FROM COST_TYPE_SELECTION CST\n" +
"LEFT JOIN GBL_HYPACCT_RSLV_TBL_NEW_CA GBL ON GBL.TREE_NODE = CST.GL_TREE_NODE AND GBL.TREE_LEVEL = CST.GL_TREE_LEVEL\n" +
"LEFT JOIN DIM_HYP_PCCODE_FLATTEN DIM ON CST.PC_TREE_LEVEL = DIM.TREE_LEVEL AND CST.PC_TREE_NODE = DIM.TREE_LEVEL_NODE\n" +
"AND DIM.LEGAL_ENTITY='007'\n" +
"AND DIM.PC_CODE=?" +
"and CST.COST_TYPE='Direct_Expenses'\n";
PreparedStatement sta2 = con.prepareStatement(consolm);
sta2.setString(1, ss);
ResultSet result3 = sta2.executeQuery();
HashMap<String, List<String>> map = new HashMap<>();
HashMap<String, List<String>> map5 = new HashMap<>();
HashMap<String, List<String>> map6 = new HashMap<>();
List<String> glAcs = new ArrayList<>();
List<String> glAcs2 = new ArrayList<>();
List<String> glAcs3 = new ArrayList<>();
List<String> glAcs4 = new ArrayList<>();
while(result3.next()){
String de = result3.getString("gbl.descr");
if(map.get(de)!=null){
glAcs = map.get(de);
glAcs.add(result3.getString("gbl.tree_leaf"));
map.put(de,glAcs);
data.add(result3.getString("gbl.tree_leaf"));
}else{
List<String> glAcs1 = new ArrayList<>();
glAcs1.add(result3.getString("gbl.tree_leaf"));
map.put(de,glAcs1);
data.add(result3.getString("gbl.tree_leaf"));
}
String pe = result3.getString("gbl.descr");
if(map5.get(pe)!=null){
glAcs3 = map5.get(pe);
glAcs3.add(result3.getString("cst.legal_entity"));
map5.put(pe,glAcs3);
data22.add(result3.getString("cst.legal_entity"));
}
else{ List<String> glAcs13 = new ArrayList<>();
glAcs13.add(result3.getString("cst.legal_entity"));
map5.put(pe,glAcs13);
data22.add(result3.getString("cst.legal_entity"));
}
String he = result3.getString("gbl.descr");
if(map6.get(he)!=null){
glAcs4 = map6.get(he);
glAcs4.add(result3.getString("dim.pc_code"));
map6.put(he,glAcs4);
data33.add(result3.getString("dim.pc_code"));
}
else{
List<String> glAcs14 = new ArrayList<>();
glAcs14.add(result3.getString("dim.pc_code"));
map6.put(he,glAcs14);
data33.add(result3.getString("dim.pc_code"));
}
}
Set<String> hs = map.keySet();
Iterator itr = hs.iterator();
while(itr.hasNext()){
String key = itr.next().toString();
Glac.addAll(map.get(key));
}
System.out.println(" Final count of hive was :"+Glac.size());
System.out.println(" Final count of hive was :"+data.size());
Set<String> hs22 = map5.keySet();
Iterator itr22 = hs22.iterator();
while(itr22.hasNext()){
String key = itr22.next().toString();
legen.addAll(map5.get(key));
}
System.out.println(" Final count of hive was :"+legen.size());
System.out.println(" Final count of hive was :"+data22.size());
Set<String> hs33 = map6.keySet();
Iterator itr33 = hs33.iterator();
while(itr33.hasNext()){
String key = itr33.next().toString();
pc.addAll(map6.get(key));
}
System.out.println(" Final count of hive was :"+pc.size());
System.out.println(" Final count of hive was :"+data33.size());
con.close();
}catch(ClassNotFoundException |IOException e){
}catch (SQLException e){
e.printStackTrace();
}catch(Exception e){
e.printStackTrace();
System.out.println(e.toString());
}
}
public void script2(String ss) {
try{
String consolm = "select * from EPM_CONSOLIDATED_LEDGER_M EPM\n" +
"WHERE EPM.sourcedataloccd='SG'AND EPM.primarysourcesyscd NOT IN('EPMCA','EPMTX','EPMOS')\n" +
"AND EPM.businessdt='20181130' AND EPM.rundt='20181204' AND EPM.GL_BU_CD IN ('DBU','ACU')\n" +
"AND EPM.LEGAL_ENTITY = '007'\n" +
"AND EPM.gl_profit_centre_cd = ?";
PreparedStatement sta2 = con.prepareStatement(consolm);
sta2.setString(1, ss);
ResultSet result3 = sta2.executeQuery();
HashMap<String, List<String>> map = new HashMap<>();
HashMap<String, List<String>> map3 = new HashMap<>();
HashMap<String, List<String>> map4 = new HashMap<>();
List<String> glAcs2 = new ArrayList<>();
List<String> glAcs3 = new ArrayList<>();
List<String> glAcs4 = new ArrayList<>();
while(result3.next())
{
String de = result3.getString("epm.product_cd_hyperion");
if(map.get(de)!=null){
glAcs2 = map.get(de);
glAcs2.add(result3.getString("epm.gl_account_number"));
map.put(de,glAcs2);
data2.add(result3.getString("epm.gl_account_number"));
}else{
List<String> glAcs12 = new ArrayList<>();
glAcs12.add(result3.getString("epm.gl_account_number"));
map.put(de,glAcs12);
data2.add(result3.getString("epm.gl_account_number"));
}
String pe = result3.getString("epm.product_cd_hyperion");
if(map3.get(pe)!=null){
glAcs3 = map3.get(pe);
glAcs3.add(result3.getString("epm.legal_entity"));
map3.put(pe,glAcs3);
data3.add(result3.getString("epm.legal_entity"));
}
else{ List<String> glAcs13 = new ArrayList<>();
glAcs13.add(result3.getString("epm.legal_entity"));
map3.put(pe,glAcs13);
data3.add(result3.getString("epm.legal_entity"));
}
String he = result3.getString("epm.product_cd_hyperion");
if(map4.get(he)!=null){
glAcs4 = map4.get(he);
glAcs4.add(result3.getString("epm.gl_profit_centre_cd"));
map4.put(he,glAcs4);
data4.add(result3.getString("epm.gl_profit_centre_cd"));
}
else{
List<String> glAcs14 = new ArrayList<>();
glAcs14.add(result3.getString("epm.gl_profit_centre_cd"));
map4.put(he,glAcs14);
data4.add(result3.getString("epm.gl_profit_centre_cd"));
}
}
Set<String> hs = map.keySet();
Iterator itr = hs.iterator();
while(itr.hasNext()){
String key = itr.next().toString();
Glac2.addAll(map.get(key));
}
System.out.println(" Final count of hive2 was :"+Glac2.size());
System.out.println(" Final count of hive2 was :"+data2.size());
Set<String> hs2 = map3.keySet();
Iterator itr2 = hs2.iterator();
while(itr2.hasNext()){
String key = itr2.next().toString();
legen2.addAll(map3.get(key));
}
System.out.println(" Final count of hive3 was :"+legen2.size());
System.out.println(" Final count of hive3 was :"+data3.size());
Set<String> hs3 = map4.keySet();
Iterator itr3 = hs3.iterator();
while(itr3.hasNext()){
String key = itr3.next().toString();
pc2.addAll(map4.get(key));
}
System.out.println(" Final count of hive4 was :"+pc2.size());
System.out.println(" Final count of hive4 was :"+data4.size());
con.close();
}catch(ClassNotFoundException |IOException e){
}catch (SQLException e){
e.printStackTrace();
}catch(Exception e){
e.printStackTrace();
System.out.println(e.toString());
}
}
@Test
public void Innerjoin() throws ClassNotFoundException, SQLException, InstantiationException, IllegalAccessException {
Script1("0200");
script2("0200");
ArrayList<String> MatchingGL = new ArrayList<String>();
for (int i = 0; i < Glac2.size(); i++) {
if (Glac.contains(Glac2.get(i))) {
MatchingGL.add(Glac2.get(i));
}
}
System.out.println("after contains using for loop :" + MatchingGL.size());
ArrayList<String> MatchingGL2 = new ArrayList<String>();
for (int i = 0; i < Glac2.size(); i++) {
if (legen.contains(legen2.get(i))&&pc.contains(pc2.get(i))
&&Glac.contains(Glac2.get(i))) {
MatchingGL2.add(Glac2.get(i));
}
}
System.out.println("after contains using for loop :" + MatchingGL2.size());
}
答案 0 :(得分：0)
让我们为第一个查询假设COST_TYPE_SELECTION包含10个有效行，而LEFT JOIN与DIM_HYP_PCCODE_FLATTEN一起从DIM返回5行。
这意味着使用EPM_CONSOLIDATED_LEDGER_M进行的内部联接将针对5行进行，因此即使该联接中的所有行均匹配，查询的总行数也将为5。
对于相同的数据，第一个jdbc查询将返回所有10行，因为没有内部联接，因此无法确定第二个jdbc查询将返回多少行，但是从您的结果中可以肯定地说这将是很多多于5行。
因此，要在Java中解决此问题，您需要包括内部联接中使用的所有列，然后执行与所有这些列的列表之间的内部联接中相同的匹配。