I'm currently working on a functionality that involves view with huge dataset in Appian and I am planning to replace it with record relationship. I have a situation where I'm using a left join with a table and implementing a self-join with three conditions using the AND operator.
Here's the view that I want to replace.
SELECT `snapFrom`.`id` AS `id`, `snapFrom`.`material` AS `material`, CAST( `snapFrom`.`FCFinalTotal` AS DOUBLE ) AS `FCFinalTotalFrom`, CAST(`snapTo`.`FCFinalTotal` AS DOUBLE) AS `FCFinalTotalTo`, `snapFrom`.`snapshot` AS `snapFrom`, `snapTo`.`snapshot` AS `snapTo`, `snapTo`.`FCFinalTotal` - `snapFrom`.`FCFinalTotal` AS `diffValue`, CONCAT( SUBSTRING_INDEX(`snapFrom`.`calWeek`, '.', -1), '.', SUBSTRING_INDEX(`snapFrom`.`calWeek`, '.', 1) ) AS `calWeek`, `m`.`basecode` AS `baseCode`FROM ( ( `Appian`.`SOE_STAGING_FORECAST_WEEKLY` `snapFrom` LEFT JOIN `Appian`.`SOE_STAGING_FORECAST_WEEKLY` `snapTo` ON ( `snapFrom`.`calWeek` = `snapTo`.`calWeek` AND `snapFrom`.`material` = `snapTo`.`material` AND `snapFrom`.`companyCode` = `snapTo`.`companyCode` ) ) LEFT JOIN `Appian`.`SOE_MaterialMasterData` `m` ON ( `m`.`material` = `snapFrom`.`material` AND `m`.`companyCode` = `snapFrom`.`companyCode` ) )WHERE `m`.`basecode` IS NOT NULL
I have created three records and established the relationship, but i am struggling to add join condition, can someone advice how we can add these join conditions.
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I have a same scenario where I am replacing the existing summary view to Appian Records. From the above message I can understand that after establishing relationship you are not able get the desired record list what you expect. My suggestion would be to have a recheck on relationships established and confirm that proper relationship type is chosen and relationship for all fields in join are made. Once refresh relationship in all three records and try again.
Perhaps we need to get a quick wrap up what the data fabric principles are.1.) get rid of the idea of tables and the desires to join them2.) become familiar how appian is referencing records https://docs.appian.com/suite/help/23.4/reference-records.html