Quite small but useful trick about filterFeatures property of af:column
In ADF table column when we apply search using the filter it matches case (A-Z,a-z), means by default search is case sensitive, to change it you can change a property in the column.
To change this property just select that column and go to property inspector, change ‘filterFeatures’ to ‘caseInsensitive’
and It will search for data in the table without matching case
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Technical Lead working on Oracle ADF