在 Microsoft Dynamics 中使用 executeQueryWithParameters 加入 x++/sql 语句时，如何获得正确的语法？

问题描述

我目前正在查看 Dynamics 365 for Finance and Operations Development Cookbook - 第四版中的“Executing a direct SQL statement”示例。

在文本中，以下内容用于填充str sqlStatement：

 sqlStatement = 'SELECT %1,%2 FROM %3 ' + 
          'JOIN %4 ON %3.%5 = %4.%6 ' + 
          'WHERE %7 = %9 AND %8 = %10'; 
 
          sqlStatement = strFmt( 
           sqlStatement,fldAccountNum.name(DbBackend::sql),fldName.name(DbBackend::sql),tblvendTable.name(DbBackend::sql),tblDirPartyTable.name(DbBackend::sql),fldParty.name(DbBackend::sql),fldRecId.name(DbBackend::sql),fldDataAreaId.name(DbBackend::sql),fldBlocked.name(DbBackend::sql),sqlSystem.sqlLiteral(curext(),true),sqlSystem.sqlLiteral(CustvendorBlocked::No,true)); 

被执行

resultSet      = statement.executeQuery(sqlStatement);

但是，Visual Studio 警告我这已经过时了，所以我想用 statement.executeQueryWithParameters(sqlStatement,valueByKeyMap);

替换它

...当然，要做到这一点，我需要创建地图，这似乎没有我预期的那么简单。

目前我已经分配了这个：

str sqlStatement = @'SELECT @accountNumberField,@nameField' +
                ' FROM @vendTable v' +
                ' JOIN @partyTable p' +
                '      ON (@vendTable.@partyField = @partyTable.@recId)' +
                ' WHERE (@dataAreaIdField = @dataArea)' +
                '      AND (@blockedField = @notBlocked)';

然后像这样填充地图：

        Map valueByKeyMap = sqlParams::create();

        DictField accountNumberField = new DictField(tableNum(vendTable),fieldNum(vendTable,AccountNum));
        valueByKeyMap.add('accountNumberField',accountNumberField.name(DbBackend::sql));

        DictField nameField = new DictField(tableNum(DirPartyTable),fieldNum(DirPartyTable,Name));
        valueByKeyMap.add('nameField',nameField.name(DbBackend::sql));

        DictTable vendTableDictionary = new DictTable(tableNum(vendTable));
        valueByKeyMap.add('vendTable',vendTableDictionary.name(DbBackend::sql));

        DictTable partyTableDictionary = new DictTable(tableNum(DirPartyTable));
        valueByKeyMap.add('partyTable',partyTableDictionary.name(DbBackend::sql));

        DictField partyField = new DictField(tableNum(vendTable),Party));
        valueByKeyMap.add('partyField',partyField.name(DbBackend::sql));

        DictField recId = new DictField(tableNum(DirPartyTable),RecId));
        valueByKeyMap.add('recId',recId.name(DbBackend::sql));

        DictField dataAreaIdField = new DictField(tableNum(vendTable),DataAreaId));
        valueByKeyMap.add('dataAreaIdField',dataAreaIdField.name(DbBackend::sql));

        DictField blockedField = new DictField(tableNum(vendTable),Blocked));
        valueByKeyMap.add('blockedField',blockedField.name(DbBackend::sql));
        
        valueByKeyMap.add('dataArea',curext());
        valueByKeyMap.add('notBlocked',_sqlSystem.sqlLiteral(CustvendorBlocked::No,true));

但是，当代码执行时，我得到 [Microsoft][ODBC Driver 17 for sql Server][sql Server]Incorrect Syntax near '@partyField'.

预期的语法是什么，我应该如何解决这个问题？

解决方法

我不熟悉 MS 动态编程。使用 C# 字符串插值，有点

String accountNumberField = ...;
String nameField = ... ;
//... other variables for the string interpolation below
String statement =$"SELECT {accountNumberField},{nameField} 
                  FROM {vendTable} v 
                 JOIN {partyTable} p 
                       ON (v.{partyField} = p.{recId}) 
                  WHERE ({dataAreaIdField} = @dataArea) 
                       AND ({blockedField} = @notBlocked)";

  // Create and set values only Sql parameters `@dataArea` and `@notBlocked` with your tool here. Assotiate them with sqlStatement  which text is statement
  // ...
  
 resultSet  = statement.executeQuery(sqlStatement);