The visibility of records is affected by DbClearFilter(). The effect of a filter condition is described under the function DbSetFilter() and the command SET FILTER.
Function DbClearFilter() Foundation
Clears the filter setting in a work area.
DbClearFilter() --> NIL
The return value of DbClearFilter() is always NIL.
If a filter is defined for a work area, it is cleared by the function DbClearFilter(). When the function is used without the alias operator, the filter in the current work area is cleared.
The command SET FILTER TO with no specified filter expression can be used instead of DbClearFilter(). SET FILTER TO is only effective in the current work area.
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