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# File 'lib/arjdbc/mssql/limit_helpers.rb', line 67
def replace_limit_offset!(sql, limit, offset, order)
if limit
offset ||= 0
start_row = offset + 1
end_row = offset + limit.to_i
find_select = /\b(SELECT(?:\s+DISTINCT)?)\b(.*)/im
whole, select, rest_of_query = find_select.match(sql).to_a
rest_of_query.strip!
if rest_of_query[0...1] == "1" && rest_of_query !~ /1 AS/i
rest_of_query[0] = "*"
end
if rest_of_query[0] == "*"
from_table = LimitHelpers.get_table_name(rest_of_query)
rest_of_query = from_table + '.' + rest_of_query
end
new_sql = "#{select} t.* FROM (SELECT ROW_NUMBER() OVER(#{order}) AS _row_num, #{rest_of_query}"
new_sql << ") AS t WHERE t._row_num BETWEEN #{start_row.to_s} AND #{end_row.to_s}"
sql.replace(new_sql)
end
sql
end
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