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174 | -----------------------------------------------------------------------
-- pschema - Print the database schema
-- Copyright (C) 2009, 2010, 2011, 2012, 2015, 2021 Stephane Carrez
-- Written by Stephane Carrez (Stephane.Carrez@gmail.com)
--
-- Licensed under the Apache License, Version 2.0 (the "License");
-- you may not use this file except in compliance with the License.
-- You may obtain a copy of the License at
--
-- http://www.apache.org/licenses/LICENSE-2.0
--
-- Unless required by applicable law or agreed to in writing, software
-- distributed under the License is distributed on an "AS IS" BASIS,
-- WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-- See the License for the specific language governing permissions and
-- limitations under the License.
-----------------------------------------------------------------------
with ADO;
with ADO.Drivers;
with ADO.Configs;
with ADO.Sessions;
with ADO.Sessions.Factory;
with ADO.Schemas;
with Ada.Text_IO;
with Ada.Exceptions;
with Ada.Command_Line;
with Util.Strings.Transforms;
with Util.Log.Loggers;
procedure Pschema is
use ADO;
use Ada;
use ADO.Schemas;
use Util.Strings.Transforms;
function To_Model_Type (Kind : in ADO.Schemas.Column_Type) return String;
function To_Model_Type (Kind : in ADO.Schemas.Column_Type) return String is
begin
case Kind is
when T_BOOLEAN =>
return "boolean";
when T_TINYINT | T_SMALLINT | T_INTEGER =>
return "integer";
when T_LONG_INTEGER =>
return "long";
when T_TIME | T_DATE_TIME | T_TIMESTAMP =>
return "datetime";
when T_DATE =>
return "date";
when T_BLOB =>
return "blob";
when T_VARCHAR =>
return "string";
when others =>
return "?";
end case;
end To_Model_Type;
Factory : ADO.Sessions.Factory.Session_Factory;
begin
Util.Log.Loggers.Initialize ("samples.properties");
-- Initialize the database drivers.
ADO.Drivers.Initialize ("samples.properties");
-- Initialize the session factory to connect to the
-- database defined by 'ado.database' property.
if Ada.Command_Line.Argument_Count < 1 then
Ada.Text_IO.Put_Line ("Usage: pschema connection");
Ada.Text_IO.Put_Line ("Example: pschema mysql://localhost:3306/test");
Ada.Command_Line.Set_Exit_Status (2);
return;
end if;
Factory.Create (Ada.Command_Line.Argument (1));
declare
DB : constant ADO.Sessions.Master_Session := Factory.Get_Master_Session;
Schema : ADO.Schemas.Schema_Definition;
Iter : Table_Cursor;
begin
DB.Load_Schema (Schema);
-- Dump the database schema using SQL create table forms.
Iter := Get_Tables (Schema);
while Has_Element (Iter) loop
declare
Table : constant Table_Definition := Element (Iter);
Table_Iter : Column_Cursor := Get_Columns (Table);
begin
-- Ada.Text_IO.Put_Line ("create table " & Get_Name (Table) & " (");
Ada.Text_IO.Put_Line (Get_Name (Table) & ":");
Ada.Text_IO.Put_Line (" type: entity");
Ada.Text_IO.Put (" table: ");
Ada.Text_IO.Put_Line (Get_Name (Table));
Ada.Text_IO.Put_Line (" id:");
while Has_Element (Table_Iter) loop
declare
Col : constant Column_Definition := Element (Table_Iter);
begin
if Is_Primary (Col) then
Ada.Text_IO.Put (" ");
Ada.Text_IO.Put (To_Lower_Case (Get_Name (Col)));
Ada.Text_IO.Put_Line (":");
Ada.Text_IO.Put (" type: ");
if Get_Type (Col) in T_INTEGER | T_LONG_INTEGER then
Ada.Text_IO.Put_Line ("identifier");
else
Ada.Text_IO.Put_Line (To_Model_Type (Get_Type (Col)));
Ada.Text_IO.Put (" length:");
Ada.Text_IO.Put_Line (Natural'Image (Get_Size (Col)));
end if;
Ada.Text_IO.Put (" column: ");
Ada.Text_IO.Put_Line (Get_Name (Col));
Ada.Text_IO.Put (" not-null: ");
Ada.Text_IO.Put_Line ((if Is_Null (Col) then "true" else "false"));
end if;
end;
Next (Table_Iter);
end loop;
Ada.Text_IO.Put_Line (" fields:");
Table_Iter := Get_Columns (Table);
while Has_Element (Table_Iter) loop
declare
Col : constant Column_Definition := Element (Table_Iter);
begin
if not Is_Primary (Col) then
Ada.Text_IO.Put (" ");
Ada.Text_IO.Put (To_Lower_Case (Get_Name (Col)));
Ada.Text_IO.Put_Line (":");
Ada.Text_IO.Put (" type: ");
Ada.Text_IO.Put_Line (To_Model_Type (Get_Type (Col)));
if Get_Size (Col) > 0 then
Ada.Text_IO.Put (" length:");
Ada.Text_IO.Put_Line (Natural'Image (Get_Size (Col)));
end if;
Ada.Text_IO.Put (" column: ");
Ada.Text_IO.Put_Line (Get_Name (Col));
Ada.Text_IO.Put (" not-null: ");
Ada.Text_IO.Put_Line ((if Is_Null (Col) then "true" else "false"));
if Get_Default (Col)'Length > 0 then
Ada.Text_Io.Put (" default: ");
Ada.Text_Io.Put_Line (Get_Default (Col));
end if;
end if;
end;
Next (Table_Iter);
end loop;
-- Ada.Text_IO.Put_Line (");");
end;
Next (Iter);
end loop;
end;
exception
when E : ADO.Sessions.Connection_Error =>
Ada.Text_IO.Put_Line ("Cannot connect to database: "
& Ada.Exceptions.Exception_Message (E));
end Pschema;
|