在下面的代码中,我将比较表S_R_VAL和R_VAL的两个Resultset。我需要比较S_NUMBER(来自S_R_VAL表)和S_NO(来自R_VAL表)。 比较我收到此错误“java.lang.RuntimeException:两个ResultSet包含不同数量的列!。请帮助修复此错误。
String SSQ = "select DISTINCT S_NUMBER from OTG.S_R_VAL" +
" WHERE R_TS = (SELECT MAX(R_TS) FROM OTG.S_R_VAL) order by S_NUMBER";
String SDS = "SELECT DISTINCT S_NUMBER FROM OTG.S_R_VAL AS STG WHERE S_NUMBER NOT IN" +
"(SELECT S_NO FROM OTG.R_VAL AS REV WHERE STG.S_NUMBER = REV.S_NO )";
String SSR = "SELECT DISTINCT S_NO FROM OTG.R_VAL where S_NO != 'NULL' order by S_NO";
String SSO = "Select O_UID from OTG.OPTY where C_S_NO IN" +
"( SELECT DISTINCT S_NUMBER FROM OTG.S_R_VAL AS STG WHERE S_NUMBER NOT IN(SELECT S_NO FROM OTG.R_VAL AS REV WHERE STG.S_NUMBER = REV.S_NO ))";
//Statement statement;
try {
connection = DatabaseConnection.getCon();
statement = connection.createStatement();
statement1 = connection.createStatement();
ResultSet SQ = statement.executeQuery(SSQ);
ResultSet DS = statement.executeQuery(SDS);
ResultSet SR = statement.executeQuery(SSR);
ResultSet SO = statement.executeQuery(SSO);
while (rs.next() && SR.next(){
String res1 = rs.getString("S_NUMBER");
String res2 = SR.getString("S_NO");
StringBuffer updateQuery = new StringBuffer();
if (res1.equals(res2)) {
throw new RuntimeException(String.format("%s and %s aren't equal at common position %d",
res1, res2));
}else
{
throw new RuntimeException("The two ResultSets contains different number of columns!");
}
}
connection.commit();
答案 0 :(得分:1)
您无法重复使用相同的Statement
对象,因为在每次新executeQuery()
调用时,任何ResultSet
如果已经打开,则会隐式关闭。
当生成它的Statement对象关闭,重新执行或用于从多个结果序列中检索下一个结果时,ResultSet对象会自动关闭。
查看ResultSet的JavaDocs。