Table.View

Creates or extends a table with user-defined handlers for query and action operations.

function (optional table as nullable table, handlers as record) as table

Description

Returns a view of table where the functions specified in handlers are used in lieu of the default behavior of an operation when the operation is applied to the view.

Handler functions are optional. If a handler function is not specified for an operation, the default behavior of the operation is applied to table instead (except in the case of GetExpression).

Handler functions must return a value that is semantically equivalent to the result of applying the operation against table (or the resulting view in the case of GetExpression).

If a handler function raises an error, the default behavior of the operation is applied to the view.

Table.View can be used to implement folding to a data source ? the translation of M queries into source-specific queries (e.g. to create T-SQL statements from M queries).

Please see the published documentation for a more complete description of Table.View.

Category

Table.Table construction