如何解决在 Microsoft Dynamics 中使用 executeQueryWithParameters 加入 x++/sql 语句时,如何获得正确的语法?
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);
...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);
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