ruthvikgowda814-bot commented on issue #18020:
URL: https://github.com/apache/datafusion/issues/18020#issuecomment-3592334391
- The concat builtin function is currently producing incorrect output when
used with arrays.
- Instead of merging arrays element-wise (like array_concat does), it is
simply concatenating their string representations.
Example
select concat(make_array(1, 2, 3), make_array(4, 5));
output
[1, 2, 3][4, 5]
correct behavior
select array_concat(make_array(1, 2, 3), make_array(4, 5));
output
[1, 2, 3, 4, 5]
- The concat builtin is treating arrays as strings rather than array objects.
- It performs string concatenation ("[1,2,3]" + "[4,5]") instead of array
concatenation.
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