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109 | ------------------------------------------------------------------------------
-- --
-- Matreshka Project --
-- --
-- SQL Database Access --
-- --
-- Runtime Library Component --
-- --
------------------------------------------------------------------------------
-- --
-- Copyright © 2011-2020, Vadim Godunko <vgodunko@gmail.com> --
-- All rights reserved. --
-- --
-- Redistribution and use in source and binary forms, with or without --
-- modification, are permitted provided that the following conditions --
-- are met: --
-- --
-- * Redistributions of source code must retain the above copyright --
-- notice, this list of conditions and the following disclaimer. --
-- --
-- * Redistributions in binary form must reproduce the above copyright --
-- notice, this list of conditions and the following disclaimer in the --
-- documentation and/or other materials provided with the distribution. --
-- --
-- * Neither the name of the Vadim Godunko, IE nor the names of its --
-- contributors may be used to endorse or promote products derived from --
-- this software without specific prior written permission. --
-- --
-- THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS --
-- "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT --
-- LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR --
-- A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT --
-- HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, --
-- SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED --
-- TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR --
-- PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF --
-- LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING --
-- NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS --
-- SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. --
-- --
------------------------------------------------------------------------------
-- $Revision: 5937 $ $Date: 2020-11-18 14:27:54 +0300 (Ср, 18 ноя 2020) $
------------------------------------------------------------------------------
-- Implementation of database abstraction for PostgreSQL.
------------------------------------------------------------------------------
private with Ada.Containers.Ordered_Maps;
package Matreshka.Internals.SQL_Drivers.PostgreSQL.Databases is
type PostgreSQL_Database is new Abstract_Database with private;
type Data_Types is
(Text_Data, Integer_Data, Float_Data, Date_Data, Timestamp_Data);
function Allocate_Statement_Name
(Self : not null access PostgreSQL_Database'Class)
return Interfaces.C.Strings.chars_ptr;
-- Allocates statement identifier. Returns name as C pointer to be used
-- in low level API. Returned name must be deallocated by caller.
function Handle
(Self : not null access PostgreSQL_Database'Class) return PGconn_Access;
-- Returns database connection handle.
function Get_Error_Message
(Self : not null access PostgreSQL_Database'Class)
return League.Strings.Universal_String;
-- Returns current error message.
function Get_Type
(Self : not null access PostgreSQL_Database'Class;
Type_Oid : Oid) return Data_Types;
-- Returns base type of the type with specified Oid.
function New_String
(Item : League.Strings.Universal_String)
return Interfaces.C.Strings.chars_ptr;
-- Converts Universal_String into client encoding, allocates and returns C
-- style string. Returned object must be dellocated by caller.
private
package Maps is new Ada.Containers.Ordered_Maps (Oid, Data_Types);
type PostgreSQL_Database is new Abstract_Database with record
Handle : PGconn_Access;
Error : League.Strings.Universal_String;
Statement : Natural;
Type_Map : Maps.Map;
end record;
overriding procedure Close (Self : not null access PostgreSQL_Database);
overriding procedure Commit (Self : not null access PostgreSQL_Database);
overriding function Error_Message
(Self : not null access PostgreSQL_Database)
return League.Strings.Universal_String;
overriding procedure Finalize (Self : not null access PostgreSQL_Database);
overriding function Open
(Self : not null access PostgreSQL_Database;
Options : SQL.Options.SQL_Options) return Boolean;
overriding function Query
(Self : not null access PostgreSQL_Database) return not null Query_Access;
end Matreshka.Internals.SQL_Drivers.PostgreSQL.Databases;
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