Simulating Vertica's conditional_change_event

14. September 2017 20:19 by Jay Grossman in   //  Tags: , , , ,   //   Comments (0)
Lately my team has spent a bunch of time migrating our data warehouse from Vertica to Snowflake. While Snowflake has excellent support for analytic functions, Vertica has some functions that no other columnar database supports.  The conditional change event function "assigns an event window number to each row, starting from 0, and increments by 1 when the result of evaluating the argument expression on the current row differs from that on the previous row". CONDITIONAL_CHANGE_EVENT (... [More]


About the author

Jay Grossman

techie / entrepreneur that enjoys:
 1) my kids + awesome wife
 2) building software projects/products
 3) digging for gold in data
 4) rooting for my Boston sports teams:New England PatriotsBoston PatriotsBoston Red SoxBoston CelticsBoston Bruins

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