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Support CONCEPTQL_NO_CONSTANT_ORDER_BY environment variable on PostgreSQL/Redshift #252

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Support CONCEPTQL_NO_CONSTANT_ORDER_BY environment variable on PostgreSQL/Redshift #252

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10 changes: 10 additions & 0 deletions lib/conceptql/rdbms/postgres.rb
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Expand Up @@ -3,6 +3,16 @@
module ConceptQL
module Rdbms
class Postgres < Generic
def partition_fix(column, qualifier=nil)
# Hack used because this code doesn't know if we are using PostgreSQL or Redshift
return column unless ENV["CONCEPTQL_NO_CONSTANT_ORDER_BY"] == "true"

person_id = qualifier ? Sequel.qualify(qualifier, :person_id).cast_string : :person_id
person_id = Sequel.cast_string(person_id)
column = Sequel.expr(column).cast_string
column + '_' + person_id
end

def days_between(from_column, to_column)
cast_date(to_column) - cast_date(from_column)
end
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