Class: DBI::DBD::MSSQL::Database

Inherits:
BaseDatabase show all
Defined in:
lib/dbd/mssql/database.rb

Instance Method Summary collapse

Methods inherited from BaseDatabase

#[], #execute

Constructor Details

#initialize(dbd_db, attr) ⇒ Database

Returns a new instance of Database.



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# File 'lib/dbd/mssql/database.rb', line 8

def initialize(dbd_db, attr)
  super
  self['AutoCommit'] = true
end

Instance Method Details

#[]=(attr, value) ⇒ Object 



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# File 'lib/dbd/mssql/database.rb', line 133

def []=(attr, value)
  if attr == 'AutoCommit' and @attr[attr] != value
    @trans.commit if @trans
    unless value
      @trans = @handle.begin_transaction unless @trans
    else
      @trans = nil
    end
  end
  @attr[attr] = value
end

#columns(table) ⇒ Object 



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# File 'lib/dbd/mssql/database.rb', line 54

def columns(table)
  sql = "select object_name(c.object_id) as table_name, c.column_id, c.name, type_name(system_type_id) as sql_type,
      max_length, is_nullable, precision, scale, object_definition(c.default_object_id) as default_value,
      convert(bit,(Select COUNT(*) from sys.indexes as i
        inner join sys.index_columns as ic
          on ic.index_id = i.index_id and ic.object_id = i.object_id
        inner join sys.columns as c2 on ic.column_id = c2.column_id and i.object_id = c2.object_id
      WHERE i.is_primary_key = 1 and ic.column_id = c.column_id and i.object_id=c.object_id)) as is_primary_key,               
      convert(bit,(Select COUNT(*) from sys.indexes as i
        inner join sys.index_columns as ic
          on ic.index_id = i.index_id and ic.object_id = i.object_id
        inner join sys.columns as c2 on ic.column_id = c2.column_id and i.object_id = c2.object_id
      WHERE i.is_primary_key = 0
        and i.is_unique_constraint = 0 and ic.column_id = c.column_id and i.object_id=c.object_id)) as is_index,
      convert(bit,(Select Count(*) from sys.indexes as i inner join sys.index_columns as ic
          on ic.index_id = i.index_id and ic.object_id = i.object_id
        inner join sys.columns as c2 on ic.column_id = c2.column_id and i.object_id = c2.object_id
      WHERE (i.is_unique_constraint = 1) and ic.column_id = c.column_id and i.object_id=c.object_id)) as is_unique
      from sys.columns as c
      WHERE object_name(c.object_id) = @table_name
      order by table_name"
  stmt = prepare(sql)
  stmt.bind_param("table_name", table)
  stmt.execute
  ret = stmt.fetch_all.collect do |row|
    dtn = row[3].upcase
    ColumnInfo.new({
            'name' => row[2].to_s,
            'dbi_type' => MSSQL_TYPEMAP[dtn],
            'mssql_type_name' => dtn,
            'sql_type' =>MSSQL_TO_XOPEN[dtn][0],
            'type_name' => DBI::SQL_TYPE_NAMES[MSSQL_TO_XOPEN[dtn][0]],
            'precision' => row[6].zero? ? row[4] : row[6],
            'default' => row[8],
            'scale' => row[7],
            'nullable' => row[5],
            'primary' => row[9],
            'indexed' => row[10],
            'unique' => row[11]
    })
  end
  stmt.finish
  ret
end

#commit ⇒ Object 



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# File 'lib/dbd/mssql/database.rb', line 99

def commit
  unless @attr['AutoCommit']
    @trans.commit if @trans
    @trans = @handle.begin_transaction
  end
rescue RuntimeError, System::Data::SqlClient::SqlException => err
  raise DBI::DatabaseError.new(err.message)
end

#current_connection ⇒ Object 



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# File 'lib/dbd/mssql/database.rb', line 129

def current_connection
  @handle
end

#current_transaction ⇒ Object 



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# File 'lib/dbd/mssql/database.rb', line 46

def current_transaction
  @trans
end

#disconnect ⇒ Object 



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# File 'lib/dbd/mssql/database.rb', line 13

def disconnect
  unless @trans.nil?
    @trans.rollback unless @attr['AutoCommit']
    @trans = nil
  end
  @handle.close
rescue RuntimeError, System::Data::SqlClient::SqlException => err
  raise DBI::DatabaseError.new(err.message)
end

#do(stmt, bindvars = {}) ⇒ Object 



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# File 'lib/dbd/mssql/database.rb', line 117

def do(stmt, bindvars={})
  st = prepare(stmt)
  bindvars.each { |k, v| st.bind_param(k, v) }
  res = st.execute
  st.finish
  return res
rescue RuntimeError, System::Data::SqlClient::SqlException => err
  raise DBI::DatabaseError.new(err.message)
ensure
  st.finish if st
end

#has_transaction? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/dbd/mssql/database.rb', line 50

def has_transaction?
  !@trans.nil?
end

#ping ⇒ Object 



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# File 'lib/dbd/mssql/database.rb', line 27

def ping
  cmd = @handle.create_command
  cmd.command_text = "Select 1"
  begin
    cmd.execute_non_query
    return true
  rescue
    return false
  end
rescue RuntimeError, System::Data::SqlClient::SqlException => err
  raise DBI::DatabaseError.new(err.message)
end

#prepare(statement) ⇒ Object 



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# File 'lib/dbd/mssql/database.rb', line 23

def prepare(statement)
  Statement.new(statement, self)
end

#rollback ⇒ Object 



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# File 'lib/dbd/mssql/database.rb', line 108

def rollback
  unless @attr['AutoCommit']
    @trans.rollback if @trans
    @trans = @handle.begin_transaction
  end
rescue RuntimeError, System::Data::SqlClient::SqlException => err
  raise DBI::DatabaseError.new(err.message)
end

#tables ⇒ Object 



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# File 'lib/dbd/mssql/database.rb', line 40

def tables
  @handle.get_schema("Tables").rows.collect { |row| row["TABLE_NAME"].to_s }
rescue RuntimeError, System::Data::SqlClient::SqlException => err
  raise DBI::DatabaseError.new(err.message)
end