Class: ActiveRecord::ConnectionAdapters::IBM_DB2_LUW_COBRA

Inherits:
IBM_DB2_LUW show all
Defined in:
lib/active_record/connection_adapters/ibm_db_adapter.rb

Overview

class IBM_DB2_LUW

Instance Method Summary collapse

Methods inherited from IBM_DB2_LUW

#reorg_table

Methods inherited from IBM_DB2

#change_column, #change_column_default, #change_column_null, #get_datetime_mapping, #get_double_mapping, #get_limit_offset_clauses, #get_time_mapping, #initialize, #last_generated_id, #primary_key_definition, #query_offset_limit, #query_offset_limit!, #set_binary_default, #set_binary_value, #set_case, #set_text_default

Methods inherited from IBM_DataServer

#change_column_default, #change_column_null, #check_reserved_words, #create_index_after_table, #execute, #get_datetime_mapping, #get_double_mapping, #get_limit_offset_clauses, #get_time_mapping, #initialize, #last_generated_id, #prepare, #query_offset_limit, #query_offset_limit!, #remove_column, #reorg_table, #select, #select_rows, #set_binary_default, #set_binary_value, #set_case, #set_schema, #set_text_default, #setup_for_lob_table

Constructor Details

This class inherits a constructor from ActiveRecord::ConnectionAdapters::IBM_DB2

Instance Method Details

#limit_not_supported_types ⇒ Object

Cobra supports parameterised timestamp, hence overriding following method to allow timestamp datatype to be parameterised



2970
2971
2972
 
# File 'lib/active_record/connection_adapters/ibm_db_adapter.rb', line 2970

def limit_not_supported_types
  [:integer, :double, :date, :time, :xml, :bigint]
end

#rename_column(table_name, column_name, new_column_name) ⇒ Object

Alter table column for renaming a column This feature is supported for against DB2 V97 and above only



2976
2977
2978
2979
2980
2981
2982
2983
2984
2985
2986
2987
2988
2989
2990
2991
2992
2993
2994
2995
2996
2997
2998
2999
3000
3001
3002
3003
3004
3005
3006
3007
3008
 
# File 'lib/active_record/connection_adapters/ibm_db_adapter.rb', line 2976

def rename_column(table_name, column_name, new_column_name)
  _table_name      = table_name.to_s
  _column_name     = column_name.to_s
  _new_column_name = new_column_name.to_s

  nil_condition    = _table_name.nil? || _column_name.nil? || _new_column_name.nil?
  empty_condition  = _table_name.empty? || 
                       _column_name.empty? || 
                         _new_column_name.empty? unless nil_condition

  if nil_condition || empty_condition
    raise ArgumentError,"One of the arguments passed to rename_column is empty or nil"
  end

  begin
    rename_column_sql = "ALTER TABLE #{_table_name} RENAME COLUMN #{_column_name} \
             TO #{_new_column_name}"

    unless stmt = execute(rename_column_sql)
      error_msg = IBM_DB.getErrormsg(@adapter.connection, IBM_DB::DB_CONN )
      if error_msg && !error_msg.empty?
        raise "Rename column failed : #{error_msg}"
      else
        raise StandardError.new('An unexpected error occurred during renaming the column')
      end
    end

    reorg_table(_table_name)

  ensure
    IBM_DB.free_stmt(stmt) if stmt
  end #End of begin
end