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Summaries

A column can opt into the grid summary row through FdcColumnSummary.

const FdcDecimalColumn<dynamic>(
  fieldName: 'balance',
  label: 'Balance',
  summary: FdcColumnSummary(
    aggregate: FdcAggregate.sum,
    label: 'Total',
  ),
)

The summary panel remains hidden when no visible column has an active aggregate.

Runtime aggregate selection​

const FdcColumnSummary(
  aggregate: FdcAggregate.avg,
  allowAggregateChange: true,
)

Supported aggregate operations depend on the column data type. Unsupported combinations render as unavailable rather than changing data semantics.

For dataset-level aggregate queries and paged aggregate behavior, see DataSet Aggregates.