add/udf-hex-to-string (#6)

* added hex_to_string udf

* added udf to name

macros/streamline/configs.yaml.sql

@@ -68,6 +68,20 @@
   sql: |
     {{ python_udf_hex_to_int_with_encoding() | indent(4) }}
 
+- name: utils.udf_hex_to_string
+  signature:
+    - [hex, STRING]
+  return_type: TEXT
+  options: |
+    NULL
+    LANGUAGE SQL 
+    STRICT IMMUTABLE
+  sql: |
+    SELECT
+      LTRIM(regexp_replace(
+        try_hex_decode_string(hex),
+          '[\x00-\x1F\x7F-\x9F\xAD]', '', 1))
+
 {#
   LIVE SCHEMA
 #}
@@ -105,6 +119,5 @@
           secret_name
       )
 
-
 {% endmacro %}