Created
December 10, 2013 22:57
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Initializer to patch Arel to properly break apart IN clauses with more than 1000 values
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| module Arel | |
| module Visitors | |
| class Oracle < Arel::Visitors::ToSql | |
| private | |
| def visit_Array o | |
| if o.empty? | |
| 'NULL' | |
| else | |
| listtype = o[0].to_s =~ /\D/ ? 'odcivarchar2list': 'odcinumberlist' | |
| quoted_chunks = o.in_groups_of(999, false).map do |chunk| | |
| "(SELECT * FROM TABLE(sys.#{listtype}(#{chunk.map { |x| visit x }.join(', ')})))" | |
| end | |
| quoted_chunks * " UNION " | |
| end | |
| end | |
| end | |
| end | |
| end if USE_RAILS_3 |
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