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VJQuery Sample

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Note

Indexing Service is no longer supported as of Windows XP and is unavailable for use as of Windows 8. Instead, use Windows Search for client side search and Microsoft Search Server Express for server side search.

 

The VJQuery sample is an example command-line application written in Microsoft Visual J++ that illustrates how to query Indexing Service using a SQL query language and the ActiveX Data Objects (ADO) API.

Source: mssdk\samples\winbase\indexing\VJQuery\

To build the sample

  1. In the Visual J++ development environment, open the VJQuery.vjp project from the source path of the sample.
  2. In the Build menu, select Build.

To execute a default query using the sample

  1. Make sure that Indexing Service is started.
  2. In the Debug menu, select Start.
  3. In the JView window, read the results of the default SQL query 
    SELECT Filename, Size, Write, Path
  FROM SCOPE('DEEP TRAVERSAL OF "\"')
  WHERE CONTAINS('"Indexing Service"')

To specify a complete SQL statement for a query using the sample

  1. Make sure that Indexing Service is started.

  2. Set the PATH environment variable to include "D:\mssdk\Bin", where D: is the drive on which you installed the Platform SDK.

  3. Open a command window and change the directory to the path of the built sample.

  4. Formulate a query that you know will succeed. You need to know the machine, catalog, scope, and query text.

  5. Submit a complete SQL statement by entering, at the command-line prompt, jview /p /cp:p "<JAVAPACKAGES>" VJQuery -s <Statement>

    where <Statement> is a complete SQL statement such as the default SQL query in the preceding section. You must escape any double-quote characters in the text of the <Statement> parameter.

To specify only a WHERE clause for a query using the sample

  1. Make sure that Indexing Service is started.

  2. Set the PATH environment variable to include "D:\mssdk\Bin", where D: is the drive on which you installed the Platform SDK.

  3. Open a command window and change the directory to the path of the built sample.

  4. Formulate a query that you know will succeed. You need to know values for the machine, catalog, scope, and query text.

  5. Submit text for a WHERE clause that is concatenated to the following incomplete, fixed SQL statement

    SELECT Filename, Size, Write, Path
  FROM SCOPE('DEEP TRAVERSAL OF "\"')
  WHERE

    by entering, at the command-line prompt,

    jview /p /cp:p "<JAVAPACKAGES>" VJQuery <Where_Text>

    where <Where_Text> is the desired text to follow the WHERE keyword. You must escape any double quotes in the text of the <Where_Text> parameter. For example, to duplicate the default SQL query, enter

    jview /p /cp:p "<JAVAPACKAGES>" VJQuery CONTAINS('\"Indexing Service\"')

Programming Notes

The Query class of the sample has methods that set the text of the query, execute the query, and display the results of the query.

  • Either the SetRawSql method or the SetSqlWhere method sets the m_SqlText variable to the specified SQL statement.
  • The Execute method executes the query. It creates an ADO Recordset object and executes the query by opening the object with the SQL text and the OLE DB Provider for Indexing Service.
  • The Display method enumerates the resulting values of the fields from the Recordset object and prints them.