Customer reporting issue on both the 1.2.3 and the 1.2.5 builds.
This is a complete error that is showing when we run some of our queries:
ERROR 1815 (HY000): Internal error: An unexpected condition within the query caused an internal processing error within Columnstore. Please check the log files for more details. Additional Information: error in TupleAggregateSte.
MCOL-2091 that has a similar error message, but they believe this is a different problem.
I post the query in the next comments