pyflink.table.expression.Expression.array_join

Expression.array_join(delimiter, null_replacement=None) → pyflink.table.expression.Expression

Returns a string that represents the concatenation of the elements in the given array and the elements’ data type in the given array is string. The delimiter is a string that separates each pair of consecutive elements of the array. The optional null_replacement is a string that replaces null elements in the array. If null_replacement is not specified, null elements in the array will be omitted from the resulting string. Returns null if input array or delimiter or nullReplacement are null.

New in version 1.12.0.