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table_junction [2013/08/14 22:42]
127.0.0.1 external edit 		table_junction [2026/08/28 03:35] (current)
hermann Sync from local documentation review
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 ===== Description ===== ===== Description =====
  
-This functor chooses one from two possible ​tables produced from different ​execution pipelines.+Picks the first available table from two possible execution pipelines, so a table still reaches the rest of the model even when one of the pipelines that could produce it does not run.
  
 ===== Inputs ===== ===== Inputs =====
  
-^ Name  ^ Type  ^ Description ​                                ​^ +^ Name  ^ Type  ^ Description ​ ^ 
-| Possible Table 1 | [[Table Type|Table]] | Table output from an execution ​path.  | +| Possible Table 1  | [[Table Type]] ​ | Table produced by one possible ​execution ​pipeline.  | 
-| Possible Table 2 | [[Table Type|Table]] | Table output from an execution ​path.  |+| Possible Table 2  | [[Table Type]] ​ | Table produced by another possible ​execution ​pipeline.  | 
 + 
 +===== Optional Inputs ===== 
 + 
 +None.
  
 ===== Outputs ===== ===== Outputs =====
  
 ^ Name  ^ Type  ^ Description ​ ^ ^ Name  ^ Type  ^ Description ​ ^
-| Table  | [[Table Type|Table]] | Table chosen.  |+| Table  | [[Table Type]] ​ | Table picked.  |
  
 ===== Group ===== ===== Group =====
  
-[[Functor List#​Control|Control]]+[[Functor List#​Control | Control]]
  
 ===== Notes ===== ===== Notes =====
  
-First, this functor verifies whether there is a valid input in "Possible Table 1", if not, it chooses as input "Possible Table 2". It is a convenient way to provide an alternate table in case an execution pipeline does not return a valid table. If "​Possible Table 2" is not set, the functor ​will return ​a void output.+The inputs are checked ​in order — Possible Table 1, then Possible Table 2 — and the first one that has a value is passed ​to the output. If neither input has a value, the output is left without one, which allows chaining several junctions together to combine more than two possible pipelines. 
 + 
 +This functor ​is typically placed after a container whose execution is conditional,​ such as [[If Then]] or [[Skip On Error]], so a default table is still available when that container'​s content does not run or does not finish.
  
 ===== Internal Name ===== ===== Internal Name =====