Выход запроса неверен в ucanaccess

Question

У меня есть файл accdb. Я использую ucanaccess api для подключения к нему из моего Java-проекта и обработки данных. (У меня нет MS Access, я использую ucanaccess в качестве ссылочной библиотеки в своем Java-проекте).

Однако я столкнулся странный вопрос, когда я импортировать файл ACCDB в сервере SQL и выполнить запрос SELECT B.grd , b.[credit hours] , b.term from [1i-stem dcccd student courses] B where [student id] = '2169095'; я получаю следующий результат:

Но когда я запускаю запрос в ucanaccess, я получаю следующий результат:

(Есть два дополнительных записей в выводе командной строки ucanaccess с grd как null).

Я получаю следующие сообщения в консоли ucanaccess, когда я введите .accdb путь к файлу:

Please, enter the full path to the access file (.mdb or accdb): C:\\Users\\Tejas\\Desktop\\sample.accdb 
log4j:WARN No appenders could be found for logger (com.healthmarketscience.jackcess.impl.DatabaseImpl). 
log4j:WARN Please initialize the log4j system properly. 
WARNING:External file P:\IE\Warehouse (New 1-27-15)\MVC Data Warehouse.mdb does not exist 
WARNING:given file does not exist: P:\IE\Warehouse (New 1-27-15)\MVC Data Warehouse.mdb 
WARNING:External file P:\IE\Warehouse (New 1-27-15)\MVC Data Warehouse.mdb does not exist 
WARNING:given file does not exist: P:\IE\Warehouse (New 1-27-15)\MVC Data Warehouse.mdb 
WARNING:External file P:\IE\Warehouse (New 1-27-15)\MVC Data Warehouse.mdb does not exist 
WARNING:given file does not exist: P:\IE\Warehouse (New 1-27-15)\MVC Data Warehouse.mdb 
WARNING:External file P:\IE\Warehouse (New 1-27-15)\GPA - Standing.mdb does not exist 
WARNING:given file does not exist: P:\IE\Warehouse (New 1-27-15)\GPA - Standing.mdb 
WARNING:External file P:\IE\Warehouse (New 1-27-15)\MVC Data Warehouse.mdb does not exist 
WARNING:given file does not exist: P:\IE\Warehouse (New 1-27-15)\MVC Data Warehouse.mdb 
WARNING:External file P:\IE\Warehouse (New 1-27-15)\MVC Data Warehouse.mdb does not exist 
WARNING:given file does not exist: P:\IE\Warehouse (New 1-27-15)\MVC Data Warehouse.mdb 
WARNING:External file P:\IE\Warehouse (New 1-27-15)\MVC Data Warehouse.mdb does not exist 
WARNING:given file does not exist: P:\IE\Warehouse (New 1-27-15)\MVC Data Warehouse.mdb 
WARNING:External file P:\IE\Warehouse (New 1-27-15)\MVC Data Warehouse.mdb does not exist 
WARNING:given file does not exist: P:\IE\Warehouse (New 1-27-15)\MVC Data Warehouse.mdb 
WARNING:External file P:\IE\Warehouse (New 1-27-15)\MVC Data Warehouse.mdb does not exist 
WARNING:given file does not exist: P:\IE\Warehouse (New 1-27-15)\MVC Data Warehouse.mdb 
WARNING:Error in the metadata of the table 12i-Fac Info: table's row count in the metadata is 1642 but 1652 records have been found and loaded by UCanAccess. All will work fine, but it's better to repair your database. 
WARNING:Error in the metadata of the table 3i-STEM STUDENTS LOAD BY TERM: table's row count in the metadata is 8716 but 4358 records have been found and loaded by UCanAccess. All will work fine, but it's better to repair your database. 
Error occured at the first loading attempt of 12i-Faculty Latetst Information 
Converted view was :CREATE VIEW "Z_12I-FACULTY LATETST INFORMATION" AS SELECT "STUDENT COURSE"."FAC ID", Last("STUDENT COURSE"."FACULTY LAST NAME") AS "LASTOFFACULTY LAST NAME", Last("STUDENT COURSE"."FACULTY FIRST NAME") AS "LASTOFFACULTY FIRST NAME" 
FROM "STUDENT COURSE" 
GROUP BY "STUDENT COURSE"."FAC ID" 
Error message was :user lacks privilege or object not found: STUDENT COURSE 
Loaded Tables: 
10i-STEM STUDENT LATEST MAJOR INFORMATION, 12i-Fac Info, 13-F1 students by Term, 14i- Faculty Per Term, 15i- STEM COURSE MASTER, 15i- STEM COURSE MASTER by TERM, 1i-STEM DCCCD STUDENT COURSES, 2i - STEM latest Student Information, 3i-STEM STUDENTS LOAD BY TERM, 4i-STEM STUDENT Latest GPA, 5i-STEM MVC STUDENT COURSE 2014-15AY, 6-Financial AID By Sum of Term Amt, 7-STEM - ACAD YR MASTER, 7-STEM MVC Acad-YR TERM, 8i-STEM STUDENT COURSE STATUS BY TERM, 9-STEM TERM MASTER, Financial AID By Sum of Term Amt, STEM TERM VALUES 
Loaded Queries: 
2014-15AY STEM STUDENT UNIQ ID AS OF 6-4-15, 2i-STEM UNIQUE STUDENT LATEST TERM 
Loaded Indexes: 
Primary Key on 1i-STEM DCCCD STUDENT COURSES Columns: (ID) 
, Primary Key on 5i-STEM MVC STUDENT COURSE 2014-15AY Columns: (ID) 
, Primary Key on STEM TERM VALUES Columns: (Term Code) 
, Index on 12i-Fac Info Columns: (FAC ID) 
, Index on 7-STEM - ACAD YR MASTER Columns: (CODE) 
, Index on STEM TERM VALUES Columns: (Term Code) 

Cannot load view MVC Acad_YR - TERM : user lacks privilege or object not found: STUDENT COURSE 
Cannot load view 12i-Faculty Latetst Information : user lacks privilege or object not found: STUDENT COURSE 
Cannot load view 4i-STEM STUDENTS Latest GPA - 3 : user lacks privilege or object not found: GPA - TERM AND CUMM 
Cannot load view Update the Term Master : user lacks privilege or object not found: STUDENT COURSE 
Cannot resolve table 5- STEM MVC Course 
Cannot resolve table Course 
Cannot resolve table First Time in College 
Cannot resolve table GPA - Term and Cumm 
Cannot resolve table Student 
Cannot resolve table Student Course 
Cannot resolve table Student Financial Aid 
Cannot resolve table Student Load 
Cannot resolve table Student Type 
UCanAccess> 
Copyright (c) 2012 Marco Amadei 
UCanAccess version 3.0.1 
You are connected!! 
Type quit to exit 

Commands end with ; 

use: 
    export <pathToCsv>; 
for exporting into a .csv file the result set from the last executed query 

UCanAccess>SELECT B.grd , b.[credit hours] , b.term from [1i-stem dcccd student courses] B where [student id] = '2169095'; 
------------------------------ 
| GRD | Credit Hours | Term | 
------------------------------ 

| W | 4.0 | 2009FA | 

| F | 3.0 | 2009FA | 

| A | 3.0 | 2009FA | 

| F | 3.0 | 2009FA | 

| F | 3.0 | 2010SP | 

| F | 3.0 | 2010SP | 

| F | 3.0 | 2010SP | 

| C | 4.0 | 2010SP | 

| F | 3.0 | 2010SP | 

| D | 3.0 | 2012S2 | 

| C | 3.0 | 2012S2 | 

| A | 4.0 | 2014FA | 

| A | 4.0 | 2015SP | 

| A | 4.0 | 2015SP | 

| null | 4.0 | 2015FA | 

| null | 4.0 | 2015FA | 


UCanAccess> 

Есть другие такие insconsitencies, а также. Как и в SQL-сервере, для конкретного запроса один из выходных данных столбца - «A», но в ucanaccess он равен «null».

Как исправить это?

Answer 1

Во-первых, вы используете старую версию 2.0.9.5, поэтому, пожалуйста, было бы здорово, если бы вы использовали последний 3.0.1 и обновили свой вопрос с выходом 3.0.1 в качестве первого шага. Во-вторых, db, скорее всего, поврежден и может быть исправлен с помощью инструмента MS Access Compact и Repair. Однако может оказаться очень полезным выполнить следующий код (jackcess) и сообщить нам ваши результаты (выход программы).

package net.ucanaccess.test; 

import java.io.File; 
import java.io.IOException; 
import java.sql.SQLException; 
import java.util.Iterator; 

import com.healthmarketscience.jackcess.Database; 
import com.healthmarketscience.jackcess.DatabaseBuilder; 
import com.healthmarketscience.jackcess.Row; 
import com.healthmarketscience.jackcess.Table; 


public class Jackcess { 
    public static void main(String[] d) throws IOException, SQLException{ 
     DatabaseBuilder dbd =new DatabaseBuilder(new File("Path to your file")); 
     dbd.setAutoSync(false); 
     Database db=dbd.open(); 
     Table t=db.getTable("1i-stem dcccd student courses"); 
     System.out.println(t); 
      Iterator<Row> it=t.iterator(); 
      while(it.hasNext()){ 
       System.out.println(it.next()); 
      } 
    } 

}