Type.ReplaceTableKeys

Syntax

Type.ReplaceTableKeys(tableType as type, keys as list) as type

About

Returns a new table type with all keys replaced by the specified list of keys.

Each key is defined using a record in the following form:

• Columns: a list of the column names that define the key
• Primary: true if the key is the table's primary key; otherwise, false

The specified list of keys is validated to ensure that no more than one primary key is defined and that all key column names exist on the table type.

Example 1

Replace the key information on a table type.

Usage

let
    BaseType = type table [ID = number, FirstName = text, LastName = text],
    KeysAdded = Type.ReplaceTableKeys(
        BaseType, 
        {
            [Columns = {"ID"}, Primary = true],
            [Columns = {"FirstName", "LastName"}, Primary = false]
        }
    ),
    DetailsOfKeys = Type.TableKeys(KeysAdded)
in
    DetailsOfKeys

Output

{
    [Columns = {"ID"}, Primary = true],
    [Columns = {"FirstName", "LastName"}, Primary = false]
}

Example 2

Clear the key information previously defined on a table type.

Usage

let
    TypeWithKey = Type.AddTableKey(type table [ID = number, Name = text], {"ID"}, true),
    KeyRemoved = Type.ReplaceTableKeys(TypeWithKey, {}),
    DetailsOfKeys = Type.TableKeys(KeyRemoved)
in
    DetailsOfKeys

Output

{}