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MySQL supports DELETE with LIMIT and ORDER BY. https://dev.mysql.com/doc/refman/8.0/en/delete.html Before: ``` Post Destroy (1.0ms) DELETE FROM `posts` WHERE `posts`.`id` IN (SELECT `id` FROM (SELECT `posts`.`id` FROM `posts` WHERE `posts`.`author_id` = ? ORDER BY `posts`.`id` ASC LIMIT ?) __active_record_temp) [["author_id", 1], ["LIMIT", 1]] ``` After: ``` Post Destroy (0.4ms) DELETE FROM `posts` WHERE `posts`.`author_id` = ? ORDER BY `posts`.`id` ASC LIMIT ? [["author_id", 1], ["LIMIT", 1]] ```
18 lines
323 B
Ruby
18 lines
323 B
Ruby
# frozen_string_literal: true
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module Arel # :nodoc: all
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class DeleteManager < Arel::TreeManager
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include TreeManager::StatementMethods
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def initialize
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super
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@ast = Nodes::DeleteStatement.new
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@ctx = @ast
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end
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def from(relation)
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@ast.relation = relation
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self
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end
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end
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end
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