def structure_dump
s = select_all("select sequence_name from user_sequences").inject("") do |structure, seq|
structure << "create sequence #{seq.to_a.first.last};\n\n"
end
select_all("select table_name from user_tables").inject(s) do |structure, table|
ddl = "create table #{table.to_a.first.last} (\n "
cols = select_all(%Q{
select column_name, data_type, data_length, data_precision, data_scale, data_default, nullable
from user_tab_columns
where table_name = '#{table.to_a.first.last}'
order by column_id
}).map do |row|
col = "#{row['column_name'].downcase} #{row['data_type'].downcase}"
if row['data_type'] =='NUMBER' and !row['data_precision'].nil?
col << "(#{row['data_precision'].to_i}"
col << ",#{row['data_scale'].to_i}" if !row['data_scale'].nil?
col << ')'
elsif row['data_type'].include?('CHAR')
col << "(#{row['data_length'].to_i})"
end
col << " default #{row['data_default']}" if !row['data_default'].nil?
col << ' not null' if row['nullable'] == 'N'
col
end
ddl << cols.join(",\n ")
ddl << ");\n\n"
structure << ddl
end
end