Int64.Type

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Int64.Type is a type facet in the Power Query M language. It represents one of the type claims belonging to ‘type number’. It is used primarily for interacting with external systems, where handling large integer values is essential. The base type of ‘type number’ in Power Query is a general numeric type, but facets like Int64.Type provide additional details (such as indicating that the numbers are 64-bit integers) for improved data handling and storage.

Examples

Generally, you will face a facet when transforming column types. You can transform a column into the specified type by using Table.TransformColumnTypes:

Table.TransformColumnTypes( Source, {{ "myColumn", Int64.Type }} )

Or when adding a column using Table.AddColumn:

Table.AddColumn( Source, "myColumn", 99, Int64.Type" )

To inspect the kind of value you are dealing with, you can make use of the Table.Schema function. Applying it to a table returns a table with information about your columns. The Table.SingleRow function then transforms the result into a record, for easier reading.

let 
  a =  99,
   // Ascribes a type claim facet for 'type number'
  b = Value.ReplaceType( a, Int64.Type ),
  // Returns a table containing a value with the ascribed "Int64.Type" 
  c = #table(type table [Col1 = Value.Type( b ) ], { b } ), 
  // Shows the Table information, including typeName and value kind
  d = Table.Schema( c ),
  // For easier viewing, return table as record
  e = Table.SingleRow( d )
in 
  e

Related facets

Other related facets are:

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