====== Calc Lookup Table Union ======

===== Description =====

Calculates the lookup table that is the union of two lookup tables.

===== Inputs =====

^ Name  ^ Type  ^ Description  ^
| First Table  | [[Lookup Table Type]]  | The first lookup table.  |
| Second Table  | [[Lookup Table Type]]  | The second lookup table.  |

===== Optional Inputs =====

^ Name  ^ Type  ^ Description  ^ Default Value  ^
| Use First Table To Solve Duplicated Key  | [[Boolean Value Type]]  | If true, and a key occurs in both tables, the value from First Table is kept; if false, the value from Second Table is kept instead.  | True  |

===== Outputs =====

^ Name  ^ Type  ^ Description  ^
| Result  | [[Lookup Table Type]]  | The resulting lookup table, containing every key present in First Table or Second Table (or both).  |

===== Group =====

[[Functor List#Lookup Table | Lookup Table]]

===== Notes =====

The key and value column names of Result are inherited from First Table.

For background on this operation, see [[https://en.wikipedia.org/wiki/Union_(set_theory)|set union]].

===== Internal Name =====

CalcLookupTableUnion