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Attempt to make episode operator use of interval work on redshift #251

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Attempt to make episode operator use of interval work on redshift #251

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10 changes: 10 additions & 0 deletions lib/conceptql/operators/episode.rb
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Original file line number Diff line number Diff line change
Expand Up @@ -96,6 +96,16 @@ def partition_vars

def date_adjust_add(db, from, by, timeframe)
if db.database_type == :postgres
if db.respond_to?(:redshift_version)
case timeframe
when /year/
by = (by * 365.24).round
timeframe = 'day'
when /month/
by = (by * 30.44).round
timeframe = 'day'
end
end
Sequel.cast(from + Sequel.lit("(? * INTERVAL '1' ?)", by, Sequel.lit(timeframe.sub(/s\z/, ''))), Date)
else
from + Sequel.lit("INTERVAL ? ?", by, Sequel.lit(timeframe))
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