Hi Noureddine: The max physical dimension number (exclude derived column in lookup tables) in a cube is 63; If you can normalize some dimensions to lookup tables, with derived dimensions, you can create a cube with more than 100 dimensions.
But a cube with > 30 physical dimensions is not recommended; You even couldn’t save that in Kylin if you don’t optimize the aggregation groups. Please search “curse of dimensionality”. > 在 2019年12月4日,22:41,Noureddine Dahmane <n...@solute.de> 写道: > > Hello, > > i am trying to create a cube in kylin with the following Star schema: > > - fact table: click with 32 measures > - dimension tables: > - brand : 2 columns > - campaign: 8 columns > - traffic_source: 11 columns > - shop_source: 40 columns > - traffic_source: 4 columns > - category; 8 columns > > i tried to reduce the complexity of the cube based on the rules like > hierarchies, join columns and mandatory columns. > however, none of these rules can be applied to my sql statements. > > Moreover, building a cube of 73 dimensions (all columns of the dimensions > tables) is not possible in KYLIN (kylin throws exception and says i should > use derived, hierarchies, and join columns to reduce the dimensions > combinations). > > is there any way can i do this or am i doing something wrong in kylin? > > thank you in advance. > > Noureddine > > -- > Noureddine Dahmane > Software Developer > > > Phone: > Fax: +49 721 98993-66 > E-mail: n...@solute.de > > > solute GmbH > Zeppelinstraße 15 > 76185 Karlsruhe > Germany > > > Marken der solute GmbH | brands of solute GmbH > billiger.de | Shopping.de | ka'ching Technology | Friends Communication > > > Geschäftsführer | Managing Director: Dr. Thilo Gans, Bernd Vermaaten > Webseite | www.solute.de > Sitz | Registered Office: Karlsruhe > Registergericht | Register Court: Amtsgericht Mannheim > Registernummer | Register No.: HRB 110579 > USt-ID | VAT ID: DE234663798 > > > Informationen zum Datenschutz | Information about privacy policy > http://solute.de/ger/datenschutz/grundsaetze-der-datenverarbeitung.php >