alamb commented on code in PR #8046:
URL: https://github.com/apache/arrow-datafusion/pull/8046#discussion_r1382227864
##########
datafusion/expr/src/expr_fn.rs:
##########
@@ -737,8 +737,9 @@ scalar_expr!(
"converts the Unicode code point to a UTF8 character"
);
scalar_expr!(Digest, digest, input algorithm, "compute the binary hash of
`input`, using the `algorithm`");
-scalar_expr!(Encode, encode, input encoding, "encode the `input`, using the
`encoding`. encoding can be base64 or hex");
-scalar_expr!(Decode, decode, input encoding, "decode the`input`, using the
`encoding`. encoding can be base64 or hex");
+// TODO make a variant of Expr that can invoke a function by name
Review Comment:
Supporting these functions will take some additional work, tracked in
https://github.com/apache/arrow-datafusion/issues/8157
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