26 lines
939 B
Ruby
26 lines
939 B
Ruby
# frozen_string_literal: true
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module Gitlab
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module Database
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module DateTime
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# Find the first of the `end_time_attrs` that isn't `NULL`. Subtract from it
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# the first of the `start_time_attrs` that isn't NULL. `SELECT` the resulting interval
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# along with an alias specified by the `as` parameter.
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#
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# Note: the interval is returned as an INTERVAL type.
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def subtract_datetimes(query_so_far, start_time_attrs, end_time_attrs, as)
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diff_fn = subtract_datetimes_diff(query_so_far, start_time_attrs, end_time_attrs)
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query_so_far.project(diff_fn.as(as))
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end
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def subtract_datetimes_diff(query_so_far, start_time_attrs, end_time_attrs)
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Arel::Nodes::Subtraction.new(
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Arel::Nodes::NamedFunction.new("COALESCE", Array.wrap(end_time_attrs)),
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Arel::Nodes::NamedFunction.new("COALESCE", Array.wrap(start_time_attrs))
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)
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end
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end
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end
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end
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