execute2D: olapR execute2D Methods

Άρθρο
02/28/2023

Takes a Query object or an MDX string, and returns the result as a data frame.

Usage

  execute2D(olapCnn, query)
  execute2D(olapCnn, mdx)

Arguments

`olapCnn`

Object of class "OlapConnection" returned by OlapConnection()

`query`

Object of class "Query" returned by Query()

`mdx`

String specifying a valid MDX query

Details

If a query is provided: execute2D validates a query object (optional), generates an mdx query string from the query object, executes the mdx query across, and returns the result as a data frame.

If an MDX string is provided: execute2D executes the mdx query, and returns the result as a data frame.

Value

A data frame if the MDX command returned a result-set. TRUE and a warning if the query returned no data. An error if the query is invalid

Notes

Multi-dimensional query results are flattened to 2D using a standard flattening algorithm.

References

Creating a Demo OLAP Cube (the same as the one used in the examples):

Multidimensional Modeling (Adventure Works Tutorial)

Examples


 cnnstr <- "Data Source=localhost; Provider=MSOLAP;"
 olapCnn <- OlapConnection(cnnstr)

 qry <- Query()

 cube(qry) <- "[Analysis Services Tutorial]"
 columns(qry) <- c("[Measures].[Internet Sales Count]", "[Measures].[Internet Sales-Sales Amount]")
 rows(qry) <- c("[Product].[Product Line].[Product Line].MEMBERS") 
 pages(qry) <- c("[Sales Territory].[Sales Territory Region].[Sales Territory Region].MEMBERS")

 result1 <- execute2D(olapCnn, qry)

 mdx <- "SELECT {[Measures].[Internet Sales Count], [Measures].[Internet Sales-Sales Amount]} ON AXIS(0), {[Product].[Product Line].[Product Line].MEMBERS} ON AXIS(1), {[Sales Territory].[Sales Territory Region].[Sales Territory Region].MEMBERS} ON AXIS(2) FROM [Analysis Services Tutorial]"

 result2 <- execute2D(olapCnn, mdx)

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