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51 lines
1.6 KiB
51 lines
1.6 KiB
# frozen_string_literal: true |
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# Fix an issue with `LIMIT` ocurring on the left side of a `UNION` causing syntax errors. |
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# See https://github.com/rails/rails/issues/40181 |
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# The fix has been merged in ActiveRecord: https://github.com/rails/rails/pull/51549 |
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# TODO: drop this when available in ActiveRecord |
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# rubocop:disable all -- This is a mostly vendored file |
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module Arel |
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module Visitors |
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class ToSql |
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private |
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def infix_value_with_paren(o, collector, value, suppress_parens = false) |
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collector << "( " unless suppress_parens |
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collector = if o.left.class == o.class |
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infix_value_with_paren(o.left, collector, value, true) |
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else |
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select_parentheses o.left, collector, false # Changed from `visit o.left, collector` |
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end |
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collector << value |
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collector = if o.right.class == o.class |
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infix_value_with_paren(o.right, collector, value, true) |
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else |
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select_parentheses o.right, collector, false # Changed from `visit o.right, collector` |
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end |
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collector << " )" unless suppress_parens |
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collector |
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end |
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def select_parentheses(o, collector, always_wrap_selects = true) |
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if o.is_a?(Nodes::SelectStatement) && (always_wrap_selects || require_parentheses?(o)) |
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collector << "(" |
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visit o, collector |
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collector << ")" |
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collector |
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else |
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visit o, collector |
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end |
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end |
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def require_parentheses?(o) |
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!o.orders.empty? || o.limit || o.offset |
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end |
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end |
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end |
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end |
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# rubocop:enable all
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