Outtypecallback function

Function to define the column names, output data types, length/precision, and scale of the data being returned to Vertica.

Function to define the column names, output data types, length/precision, and scale of the data being returned to Vertica.

Example


SalesTaxReturnTypes <- function(arguments.data.frame, parameters.data.frame) {
  output.return.type <- data.frame(datatype = rep(NA, 2),
                                   length   = rep(NA, 2),
                                   scale    = rep(NA, 2),
                                   name     = rep(NA, 2))
  output.return.type$datatype <- c("float", "float")
  output.return.type$name <- c("Sales Tax Rate", "Item Cost with Tax")
  return(output.return.type)
}

Arguments

arguments.data.frame Data frame that contains the arguments passed to the UDx from Vertica. This data frame is created and used internally by the UDx process.
parameters.data.frame Data frame that contains the parameters defined in the UDx from Vertica. This data frame is created and used internally by the UDx process.
datatype Output data type.
length (Optional) Dimension of the output.
scale (Optional) Proportional dimensions of the output.
name Column name of the output.

Description

When creating the outtypecallback function, define one row for each value returned. Use the same order as in the outtype defined in the factory function. If any columns are left blank or the outtypecallback function is omitted, then Vertica uses default values.