Class: Flydata::SourceOracle::GenerateSourceDump

Inherits:
Flydata::Source::GenerateSourceDump show all
Includes:
OracleComponent
Defined in:
lib/flydata/source_oracle/generate_source_dump.rb

Constant Summary collapse

DUMP_SIZE_QUERY =
<<EOS
SELECT
  sum(bytes) as total_size
FROM
(SELECT segment_name table_name, owner, bytes
FROM dba_segments
WHERE segment_type IN ('TABLE','TABLE PARTITION','TABLE SUBPARTITION')
UNION ALL
SELECT i.table_name, i.owner, s.bytes
FROM dba_indexes i, dba_segments s
WHERE s.segment_name = i.index_name
AND s.owner = i.owner
AND s.segment_type IN ('INDEX','INDEX PARTITION','INDEX SUBPARTITION')
UNION ALL
SELECT l.table_name, l.owner, s.bytes
FROM dba_lobs l, dba_segments s
WHERE s.segment_name = l.segment_name
AND s.owner = l.owner
AND s.segment_type IN ('LOBSEGMENT','LOB PARTITION')
UNION ALL
SELECT l.table_name, l.owner, s.bytes
FROM dba_lobs l, dba_segments s
WHERE s.segment_name = l.index_name
AND s.owner = l.owner
AND s.segment_type = 'LOBINDEX')
WHERE owner = %{schema} and table_name in (%{tables})
EOS

Instance Attribute Summary

Attributes inherited from Flydata::Source::GenerateSourceDump

#dp

Instance Method Summary collapse

Methods included from OracleComponent

#de_prefs

Methods inherited from Flydata::Source::GenerateSourceDump

inherited, #initialize

Methods inherited from Flydata::Source::Component

#initialize

Constructor Details

This class inherits a constructor from Flydata::Source::GenerateSourceDump

Instance Method Details

#confirmation_itemsObject


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# File 'lib/flydata/source_oracle/generate_source_dump.rb', line 26

def confirmation_items
  items = {
    "host"     => de_prefs['host'],
    "port"     => de_prefs['port'],
    "username" => de_prefs['username'],
    "database" => de_prefs['database'],
    "schema"   => de_prefs['schema'],
  }

  items
end

#dump(tables, file_path = nil, &src_pos_callback) ⇒ Object


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# File 'lib/flydata/source_oracle/generate_source_dump.rb', line 82

def dump(tables, file_path = nil, &src_pos_callback)
  io = nil
  if file_path
    io = File.open(file_path, "w")
  else
    raise "dump via pipe has not been implemented yet"
  end

  table_meta = Flydata::SourceOracle::TableMeta.new(de_prefs, tables)
  cli = FlydataCore::Oracle::OracleClient.new(de_prefs)
  table_meta.reload(cli)

  tables_missing_meta = tables.select{|t| tm = table_meta[t]; tm.nil? || tm.empty?}
  unless tables_missing_meta.empty?
    raise "Tables are not available.  Check if the following table(s) exist and are visible: #{tables_missing_meta.join(",")}"
  end

  context = source.sync_generate_table_ddl(dp, nil)
  source_pos = get_source_pos(table_meta.current_scn, &src_pos_callback)

  options = de_prefs.merge(table_meta: table_meta)
  missing_tables = context.each_source_tabledef(tables, options) do |tabledef, error|
    dump_table(tabledef, source_pos, io, cli) if tabledef
  end

  nil
ensure
  cli.close if cli
  io.close if io
end

#dump_size(tables) ⇒ Object


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# File 'lib/flydata/source_oracle/generate_source_dump.rb', line 66

def dump_size(tables)
  cli = FlydataCore::Oracle::OracleClient.new(de_prefs)

  query = DUMP_SIZE_QUERY % {
    schema: FlydataCore::Oracle::QueryHelper.schema_as_value(de_prefs['schema'],
                                                             de_prefs['username']),
    tables: FlydataCore::Oracle::QueryHelper.tables_as_value(tables)
  }

  cursor = cli.query(query)
  cursor.fetch_hash['TOTAL_SIZE'].to_i
ensure
  cursor.close rescue nil if cursor
  cli.close if cli
end

#run_compatibility_check(dump_dir, backup_dir) ⇒ Object


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# File 'lib/flydata/source_oracle/generate_source_dump.rb', line 17

def run_compatibility_check(dump_dir, backup_dir)
  %w(host username database).each do |k|
    if de_prefs[k].to_s.empty?
      raise "'#{k}' is required. Set the value in the conf file " +
            "-> #{Flydata::Preference::DataEntryPreference.conf_path(de)}"
    end
  end
end