Github user ashwini-krishnakumar commented on the issue:
https://github.com/apache/carbondata/pull/1390
Problem: updates not working for complex data type .
Fix : escaspe characters used for internal demiliters was causing the
update failures and null updates to fix this escaspe characters are replaced
before update processing.
Changes :1. added testcase to test update on complex struct data type
with two level delimiters
2. fixed update failures for array and struct datatype
3. added testcase for update with array data type
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