structField

Create a structField object that contains the metadata for a single field in a schema.

Usage

structField(x, ...)

# S3 method for class 'jobj'
structField(x, ...)

# S3 method for class 'character'
structField(x, type, nullable = TRUE, ...)

Arguments

x

the name of the field.

...

additional argument(s) passed to the method.

type

The data type of the field

nullable

A logical vector indicating whether or not the field is nullable

Value

A structField object.

Note

structField since 1.4.0

Examples

if (FALSE) { # \dontrun{
field1 <- structField("a", "integer")
field2 <- structField("c", "string")
field3 <- structField("avg", "double")
schema <- structType(field1, field2, field3)
df1 <- gapply(df, list("a", "c"),
              function(key, x) { y <- data.frame(key, mean(x$b), stringsAsFactors = FALSE) },
              schema)
} # }