join
join(T.A : text; S : text) 🡒 text, ordered aggregator
The aggregator returns the resulting concatenation of the text values. It requires an ordering option, either sort or scan.
Example:
table T = with
[| as A, as B |]
[| "hello", "a" |]
[| "hello", "a" |]
[| "hello", "b" |]
[| "world", "b" |]
[| "world", "c" |]
table G[gdim] = by T.B
G.S = ";"
where T.B != "c"
show table "" a1b4 with
gdim
join(T.A; G.S) sort T.A
group by gdim
The sort option can be applied to any ordered data type.
Beware, text values are limited to 256 characters in Envision.
It would also be possible to re-implement join with a user-defined process:
def process myJoin(a : text; delimiter : text) with
keep c = ""
where c == ""
c = a
else
c = "\{c}\{delimiter}\{a}"
return c