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Support of Teradata SQL Expressins

Hello ,

I'm using calcite to migrate Teradata project to a big data project.

in the SQL used by Teradata I couldn't find the equivalent expression in
calcite for the following query :

BEGIN(expd) .......
EXPAND ON PERIOD(timestamp1 ,timestamp2) as expo

I also want to take advantage of this email to ask about the best way to
query parquet files with apache calcite.

thank you very much for your answers and merry Christmas
kind regards

PhD student in data engineering - computer science
Email : zgolliasma@xxxxxxxxx
email alt:  asma.zgolli@xxxxxxxxxxxxxxxxxxxxxx <zgolliasma@xxxxxxxxx>
Tel : (+33) 07 52 95 04 45
        (+216) 50 126 797
Skype : asma_zgolli