DataTable cannot programmatically clear filters

Describe your context

dash                          2.3.0
dash-bootstrap-components     1.0.3
dash-core-components          2.0.0
dash-daq                      0.5.0
dash-html-components          2.0.0
dash-table                    5.0.0

Describe the bug

There is no way to programmatically clear a filter applied to a DataTable column via a callback. This has been documented by several other users in both the community forum and the old dash-table repo prior to the 2.0 release.

References:

• Community forum
• #715 from old repo

According to the references above, the filter_query property only reacts to valid, non-empty strings like '{col_1} = abc'. Requiring a valid, non-empty string prevents resetting the filter_query to an empty state.

Expected behavior

There should be a way to clear this displayed filter text via a callback. Possibly through some new operator in the filter_query syntax like '{col_1}' EMPTY

Screenshots

See references above.

Inizia esaminando il comportamento di DataTable filter_query descritto nell’issue, insieme alla discussione collegata sul forum della community e alla vecchia issue #715 di dash-table. Determina come un callback possa cancellare il testo del filtro della colonna visualizzato e valuta se la sintassi esistente o un nuovo operatore debba definire il comportamento finale.