QPR ProcessAnalyzer Model Datasources

From QPR ProcessAnalyzer Wiki
Revision as of 11:23, 9 October 2019 by Ollvihe (talk | contribs) (Created page with "== Loading Data from Datatables == In the ''DataSource'' section, when the ''DataSourceType'' is defined as ''datatable'' (for cases or events), data is loaded from a QPR Proc...")
(diff) ← Older revision | Latest revision (diff) | Newer revision → (diff)
Jump to navigation Jump to search

Loading Data from Datatables

In the DataSource section, when the DataSourceType is defined as datatable (for cases or events), data is loaded from a QPR ProcessAnalyzer datatable. Datatables can be created by importing data to them from a CSV file, or as a result of an ETL script.

Property Description
DataSource/Cases/DataSourceType Datasource type to use, when fetching the Cases data. Supported values are database (default), datatable, expression and odbc.
DataSource/Cases/DataTableName Name of the datatable where to fetch the cases data.
DataSource/Cases/Columns Column name mappings for QPR ProcessAnalyzer data model. Only supported mapping is CaseId defining the case id (case name). Example: 
{ 
  "CaseId": "SalesOrderHeaderId"
}

All unmapped columns are taken to the model as case attributes. If the fetched data doesn't contain a mapped column, the model loading fails and an error message is given.

DataSource/Events/DataSourceType Datasource type to use, when fetching the Events data. Supported values are database (default), datatable, expression and odbc.
DataSource/Events/DataTableName Name of the datatable where to fetch the events data.
DataSource/Events/Columns

Column name mappings for QPR ProcessAnalyzer data model. Supported mappings for Events are CaseId, EventType and Timestamp. Example: 

{ 
  "CaseId": "SalesOrderHeaderId",
  "EventType": "EventType",
  "Timestamp": "CreatedDate"
}

All unmapped columns are taken to the model as event attributes. If the fetched data doesn't contain a mapped column, the model loading fails and an error message is given.

Loading Data from ODBC Datasources

In the DataSource section, when the DataSourceType is defined as odbc (for cases or events), data is loaded from an ODBC datasource. There needs to be a suitable ODBC driver installed in QPR ProcesAnalyzer server, and ODBC connection string and query needs to be defined (more below).

Property Description
DataSource/Cases/DataSourceType Use value odbc when loading data from an ODBC datasource. More information about DataSourceType, see Loading Data from Datatables.
DataSource/Cases/OdbcConnectionString ODBC connection string to use to fetch the Cases data. Connection strings can be found in https://www.connectionstrings.com.
DataSource/Cases/OdbcQuery ODBC query to use to fetch the Cases data. Query syntax depends on the source system where the data is fetched.
DataSource/Cases/Columns For more information, see Loading Data from Datatables.
DataSource/Events/DataSourceType Use value odbc when loading data from an ODBC datasource. More information about DataSourceType, see Loading Data from Datatables.
DataSource/Events/OdbcConnectionString ODBC connection string to use to fetch the Events data. Connection strings can be found in https://www.connectionstrings.com.
DataSource/Events/OdbcQuery ODBC query to use to fetch the Events data. Query syntax depends on the source system where the data is fetched.
DataSource/Events/Columns For more information, see Loading Data from Datatables.

Configurations examples

ODBC Driver Installation

Microsoft Access Database Engine 2016 Redistributable is software package that contains ODBC drivers for

  • Microsoft SQL Server
  • Microsoft Access (*.mdb and *.accdb) files
  • Microsoft Excel (*.xls, *.xlsx, and *.xlsb) files
  • CSV text files

The package needs to be installed in the same computer where the QPR ProcessAnalyzer Server is running. Installation instructions:

  1. Go to https://www.microsoft.com/en-us/download/details.aspx?id=54920 and click Download.
  2. Select whether to use the 32bit or 64bit (x64) version (usually it's the 64bit version).
  3. Double-click the executable file on your hard disk to start the setup program.
  4. Follow the instructions on the screen to complete the installation.

If 32-bit office is installed in machine then 64-bit ODBC driver need install using /passive parameter. More information

Read data from CSV file

In this example, data is loaded from CSV files located in the file system using Microsoft Access Text Driver (*.txt, *.csv) driver. Loaded files are C:\ProcessMiningData\ModelCaseAttributes.csv and C:\ProcessMiningData\ModelEventData.csv. 

{
  "DataSource": {
    "Cases": {    
      "DataSourceType": "odbc",
      "OdbcConnectionString": "Driver={Microsoft Access Text Driver (*.txt, *.csv)};DefaultDir=C:\\ProcessMiningData\\;Extensions=asc,csv,tab,txt",
      "OdbcQuery": "SELECT * FROM [ModelCaseAttributes.csv]",
      "Columns": { 
        "CaseId": "Name"
      }
    },
    "Events": {
      "DataSourceType": "odbc",
      "OdbcConnectionString": "Driver={Microsoft Access Text Driver (*.txt, *.csv)};DefaultDir=C:\\ProcessMiningData\\;Extensions=asc,csv,tab,txt",
      "OdbcQuery": "SELECT * FROM [ModelEventData.csv]",
      "Columns": { 
        "CaseId": "Case",
        "EventType": "Event Type",
        "Timestamp": "Start Time"
      }
    }
  }
}

When reading from CSV files, you may need to set the CSV file format for the ODBC driver using the Schema.ini file (more information: https://docs.microsoft.com/en-us/sql/odbc/microsoft/schema-ini-file-text-file-driver?view=sql-server-2017).

Read data from Excel file

In this example, data is loaded from a Excel file that is accessible in the file system. In this example, the loaded file is C:\ProcessMiningData\ModelData.xlsx and cases are in sheet MyCases and events in sheet MyEvents. 

{
  "DataSource": {
    "Cases": {
      "DataSourceType": "odbc",
      "OdbcConnectionString": "Driver={Microsoft Excel Driver (*.xls, *.xlsx, *.xlsm, *.xlsb)};DBQ=C:\\ProcessMiningData\\ModelData.xlsx",
      "OdbcQuery": "SELECT * FROM [MyCases$]",
      "Columns": {
        "CaseId": "Case ID"
      }
    },
    "Events": {
      "DataSourceType": "odbc",
      "OdbcConnectionString": "Driver={Microsoft Excel Driver (*.xls, *.xlsx, *.xlsm, *.xlsb)};DBQ=C:\\ProcessMiningData\\ModelData.xlsx",
      "OdbcQuery": "SELECT * FROM [MyEvents$]",
      "Columns": {
        "CaseId": "Case ID",
        "EventType": "Activity",
        "Timestamp": "Start Time"
      }
    }
  }
}

Read data from SQL Server table

Recommended driver: https://www.microsoft.com/en-us/download/details.aspx?id=56567

In this example, data is loaded from an SQL Server table. SQL Server hostname is myServerName, instance name is myInstanceName and database name is MyDatabase. The Trusted_Connection is for Windows authentication. 

{
  "DataSource": {
    "Cases": {
      "DataSourceType": "odbc",
      "OdbcConnectionString": "Driver={ODBC Driver 17 for SQL Server};Server=myServerName\\myInstanceName;DataBase=MyDatabase;Trusted_Connection=Yes;",
      "OdbcQuery": "SELECT CASENAME, COST, COUNTRY, PRODUCT FROM CASES_TABLE",
      "Columns": { 
        "CaseId": "CASENAME"
      }
    },
    "Events": {
      "DataSourceType": "odbc",
      "OdbcConnectionString": "Driver={ODBC Driver 17 for SQL Server};Server=myServerName\\myInstanceName;DataBase=MyDatabase;Trusted_Connection=Yes;",
      "OdbcQuery": "SELECT CASENAME, CREATED_DATE, CREATED_BY FROM EVENTS_TABLE",
      "Columns": { 
        "CaseId": "CASENAME",
        "Timestamp": "CREATED_DATE",
        "EventType": "CREATED_BY"
      }
    }
  }
}

If SQL Server authentication is used, the connection string is 

Driver={ODBC Driver 17 for SQL Server};Server=myServerName\myInstanceName;DataBase=MyDatabase;Trusted_Connection=No;Uid=myUsername;PWD=myPassword;

More about SQL Server connection strings: https://www.connectionstrings.com/sql-server/

Troubleshooting

The following error message may be encountered: System.Data.Odbc.OdbcException (0x80131937): ERROR [IM002] [Microsoft][ODBC Driver Manager] Data source name not found and no default driver specified. Probable reason is that the ODBC driver is missing or driver name is not correct. To solve the issue:

  • Check ODBC drivers is installed by running C:\Windows\System32\odbcad32.exe.
  • Check the connection string.

The following error message may be encountered: ERROR [HY024] [Microsoft][ODBC Text Driver] '(unknown)' is not a valid path. Make sure that the path name is spelled correctly and that you are connected to the server on which the file resides.. Example error when specified directory is missing:

Error when CSV file is missing: System.Data.Odbc.OdbcException (0x80131937): ERROR [42S02] [Microsoft][ODBC Text Driver] The Microsoft Access database engine could not find the object 'CaseAttributes.csv'. Make sure the object exists and that you spell its name and the path name correctly. If 'CaseAttributes.csv' is not a local object, check your network connection or contact the server administrator.

Error codes for troubleshooting: ODBC Error Codes.

If the error message mention about Case or Event attributes named as F<column number> (e.g. F10), the data might be inconsistent, as there might be different amount of columns in different rows.

Expression Datasource in Loading QPR ProcessAnalyzer Model

Retrieved from "https://wiki.onqpr.com/pa/index.php?title=QPR_ProcessAnalyzer_Model_Datasources&oldid=14172"