Is it possible to add a 'join' function as aggregate function in the SQL API for google sheets?

[Hernan Desio]

I have an external sheet (that I cannot change) that contains rows with entries (like logs) for multiple projects and contracts.  I'm working on generating a Dashboard, and I would like to make a query that combines those logs into a single column (like the aggregated functions do):

For example 

|  A  |          ...         |     N       |

| PID |  many unused columns | Entry Logs  |

|  1  |      any data        | Log Text 1a |

|  4  |      any data        | Log Text 4a |

|  2  |      any data        | Log Text 2a |

|  1  |      any data        | Log Text 1b |

|  2  |      any data        | Log Text 2b |

I'm trying to get a query that gives me the following result

|  A  |                  N             |

| PID |         Entry Logs             |

|  1  |  Log Text 1a 'sep' Log Text 1b |

|  4  |  Log Text 4a                   |

|  2  |  Log Text 2a 'sep' Log Text 2b |

It will be really easy if the SQL API support the concatenation (or Join) as aggregated functions:

=query (A:N, "SELECT A, join('sep', N), GROUP BY A)

Is that something possible somehow else (without macros)?    If not, is it something that Google might consider?

Let me know