to_odata: Macro to convert R to OData syntax

In ODataQuery: Querying on 'OData'

Description

Macro to convert R to OData syntax

Usage

to_odata(expr)

to_odata_(expr)

Arguments

expr	Expression to convert to OData

Details

to_odata takes unquote R code and quotes its input. Use !! to unquote an argument. to_odata_ requires its argument to be quoted already.

Only a subset of R is supported.

* arithmatic The operators +, -, *, / and

* strings (characters in R) toupper, tolower, startsWith, endsWith, nchar, paste, paste0, trimws

* arrays (lists in R) list, append, length

* Formulae become lambdas in OData (x ~ x$Name == "John")

Every unknown function is passed as is. If the function name is surrounded by percent signs it's treated as an infix operator.

Examples

to_odata(Field == value)
address <- "Bakerstreet 4"
to_odata(!!address %in% Adresses)
to_odata(Friends$any(f ~ f$FirstName == 'John'))

ODataQuery documentation built on July 5, 2021, 5:09 p.m.