Provides methods for building a query from user input, converting a query to Windows Search SQL, and obtaining a connection string to initialize a connection to the Window Search index.

ISearchQueryHelper Members

GenerateSQLFromUserQuery	Generates a Structured Query Language (SQL) query based on a client-supplied query string expressed in either Advanced Query Syntax (AQS) or Natural Query Syntax (NQS).
get_ConnectionString	Returns the OLE DB connection string for the Window Search index.
get_QueryContentLocale	Gets the language code identifier (LCID) for the query.
get_QueryContentProperties	Gets the list of properties included in the query when search terms do not explicitly specify a property.
get_QueryKeywordLocale	Gets the LCID for the locale to use when parsing Advanced Query Syntax (AQS) keywords.
get_QueryMaxResults	Gets the maximum number of results to be returned by the query.
get_QuerySelectColumns	Gets the columns (or properties) requested in the SELECT statement of the query.
get_QuerySorting	Gets the sort order for the query result set.
get_QuerySyntax	Gets the syntax of the query.
get_QueryTermExpansion	Gets the value taht specifies how query terms are to be expanded.
get_QueryWhereRestrictions	Gets the restrictions appended to a query in WHERE clauses.
put_QueryContentLocale	Sets the LCID of the query.
put_QueryContentProperties	Sets the properties to include in the query if search terms do not explicitly specify properties.
put_QueryKeywordLocale	Sets the LCID for the locale to use when parsing Advanced Query Syntax (AQS) keywords.
put_QueryMaxResults	Sets the maximum number of results to be returned by a query.
put_QuerySelectColumns	Sets the columns (or properties) requested in the select statement.
put_QuerySorting	Sets the sort order for the query result set.
put_QuerySyntax	Sets the syntax of the query.
put_QueryTermExpansion	Sets a value that specifies how query terms are to be expanded.
put_QueryWhereRestrictions	Sets the restrictions appended to a query in WHERE clauses.
WriteProperties	Not implemented.

Remarks

This interface is obtained by calling ISearchCatalogManager::GetQueryHelper. Implement this as a helper class to ISearchCatalogManager.

This interface facilitates the generation of SQL queries using Advanced Query Syntax (AQS) or Natural Query Syntax (NQS). Clients can submit the SQL query to the Window Search engine by using OLE DB or Microsoft ActiveX Data Objects (ADO).

ISearchQueryHelper::GenerateSQLFromUserQuery uses regional locale settings. However, ISearchQueryHelper does not use the regional locale settings. As a result, there are inconsistencies in the SQL returned from ISearchQueryHelper::GenerateSQLFromUserQuery and ISearchQueryHelper for region specific settings such as date formats, for example.

The DSearch code sample, available on Code Gallery and the Windows 7 SDK, demonstrates how to create a class for a static console application to query Windows Search using the Microsoft.Search.Interop assembly for ISearchQueryHelper.

Interface Information

Inherits from	IUnknown
Header and IDL files	searchapi.h, searchquery.idl
Minimum operating systems	Windows XP Service Pack 2 (SP2) with Windows Desktop Search (WDS) 3.0, Windows Server 2003 Service Pack 1 (SP1) with Windows Desktop Search (WDS) 3.0, Windows Vista

See Also

ISearchCatalogManager::GetQueryHelper, Overview of Windows Search SQL, Advanced Query Syntax