Field Sorting is not happening when retrrieving data from portal report, through a!queryProcessAnalytics()

Field Sorting is not happening when retrieving data from portal report, through a!queryProcessAnalytics() ,
Giving field name as same as in portal report,
a!gridTextColumn(
label: "Customer Name",
field: "customerName",
data: local!breakdownlist.data.c4
)
May be because of column config, is it not allowing field sorting in the grid field.While retrieving data from mysql(todatasubset), fieldsorting is working fine. Any Suggestions ?

OriginalPostID-187341