Sql.Statement.DataDefinition.Table.Alter

Unit
Source
Symbols

Symbol	Description
TSqlAddColumn
TSqlAddColumnAfter
TSqlAddColumnFirst
TSqlAddColumnLast
TSqlAddKey
TSqlAlterColumn
TSqlAlterTable	Statement to alter a table definition.
TSqlAlterTableSpecification
TSqlDisableKeys
TSqlDropColumn
TSqlDropIndex
TSqlDropPrimaryKey
TSqlEnableKeys
TSqlRenameTable
TSqlSetAutoIncrement
TSqlSetSupportsTransactions
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///////////////////////////////////////////////////////////////////////////
//                                                                       //
//  Copyright (c) 2015 by Charta Software B.V.                           //
//  All rights reserved                                                  //
//                                                                       //
//  Version:  1.7.0.83525                                                //
//  Web site: https://pascal.chartasoftware.com/                         //
//                                                                       //
//  This code and information are provided "as is" without warranty of   //
//  any kind. Dissemination of this information or reproduction of       //
//  this material is strictly forbidden unless prior written permission  //
//  is obtained from Charta Software B.V..                               //
//                                                                       //
///////////////////////////////////////////////////////////////////////////

unit Sql.Statement.DataDefinition.Table.Alter;

interface

uses
  Boolean,
  Collection.List,
  Integer._32,
  Sql.Expression,
  Sql.Statement.DataDefinition.Table,
  Sql.Table,
  Sql.Table.Column,
  Sql.Table.Index,
  Text,
  Type_;

type
  TSqlAlterTableSpecification = class(TSqlExpression)
  public
    function    Copy(): TSqlExpression; override;
    function    CopyAlterTableSpecification(): TSqlAlterTableSpecification; virtual; abstract;
  end;

  TSqlAddColumn = class(TSqlAlterTableSpecification)
  public
    Column: TSqlTableColumn;

    constructor Create(Column: TSqlTableColumn); reintroduce; virtual;

    function    CopyAlterTableSpecification(): TSqlAlterTableSpecification; override;
    function    CopyAddColumn(): TSqlAddColumn; virtual; abstract;
  end;

  TSqlAddColumnFirst = class(TSqlAddColumn)
  public
    function    CopyAddColumn(): TSqlAddColumn; override;
    function    CopyAddColumnFirst(): TSqlAddColumnFirst;
  end;

  TSqlAddColumnLast = class(TSqlAddColumn)
  public
    function    CopyAddColumn(): TSqlAddColumn; override;
    function    CopyAddColumnLast(): TSqlAddColumnLast;
  end;

  TSqlAddColumnAfter = class(TSqlAddColumn)
  public
    After: TText;

    constructor Create(Column: TSqlTableColumn; const After: TText); reintroduce; virtual;

    function    CopyAddColumn(): TSqlAddColumn; override;
    function    CopyAddColumnAfter(): TSqlAddColumnAfter;
  end;

  TSqlAlterColumn = class(TSqlAlterTableSpecification)
  private
    FColumnType: TType;

    procedure   SetColumnType(const Value: TType);

  public
    Column:     TSqlTableColumn;
    Identifier: TText;
    Nullable:   TBoolean;
    First:      TBoolean;
    After:      TSqlTableColumn;

    constructor Create(Column: TSqlTableColumn); reintroduce; virtual;
    destructor  Destroy(); override;

    function    CopyAlterTableSpecification(): TSqlAlterTableSpecification; override;
    function    CopyAlterColumn(): TSqlAlterColumn;

    property    ColumnType: TType read FColumnType write SetColumnType;
  end;

  TSqlDropColumn = class(TSqlAlterTableSpecification)
  public
    Identifier: TText;

    constructor Create(Identifier: TText); reintroduce; virtual;

    function    CopyAlterTableSpecification(): TSqlAlterTableSpecification; override;
    function    CopyDropColumn(): TSqlDropColumn;
  end;

  TSqlAddKey = class(TSqlAlterTableSpecification)
  public
    Key: TSqlTableKey;

    constructor Create(Key: TSqlTableKey); reintroduce; virtual;

    function    CopyAlterTableSpecification(): TSqlAlterTableSpecification; override;
    function    CopyAddKey(): TSqlAddKey;
  end;

  TSqlDropPrimaryKey = class(TSqlAlterTableSpecification)
  public
    function    CopyAlterTableSpecification(): TSqlAlterTableSpecification; override;
    function    CopyDropPrimaryKey(): TSqlDropPrimaryKey;
  end;

  TSqlDropIndex = class(TSqlAlterTableSpecification)
  public
    Name: TText;

    constructor Create(Name: TText); reintroduce; virtual;

    function    CopyAlterTableSpecification(): TSqlAlterTableSpecification; override;
    function    CopyDropIndex(): TSqlDropIndex;
  end;

  TSqlDisableKeys = class(TSqlAlterTableSpecification)
  public
    function    CopyAlterTableSpecification(): TSqlAlterTableSpecification; override;
    function    CopyDisableKeys(): TSqlDisableKeys;
  end;

  TSqlEnableKeys = class(TSqlAlterTableSpecification)
  public
    function    CopyAlterTableSpecification(): TSqlAlterTableSpecification; override;
    function    CopyEnableKeys(): TSqlEnableKeys;
  end;

  TSqlRenameTable = class(TSqlAlterTableSpecification)
  public
    Identifier: TText;

    constructor Create(Identifier: TText); reintroduce; virtual;

    function    CopyAlterTableSpecification(): TSqlAlterTableSpecification; override;
    function    CopyRenameTable(): TSqlRenameTable;
  end;

  TSqlSetAutoIncrement = class(TSqlAlterTableSpecification)
  public
    Value: TInteger32;

    constructor Create(Value: TInteger32); reintroduce; virtual;

    function    CopyAlterTableSpecification(): TSqlAlterTableSpecification; override;
    function    CopySetAutoIncrement(): TSqlSetAutoIncrement;
  end;

  TSqlSetSupportsTransactions = class(TSqlAlterTableSpecification)
  private
    FValue: TBoolean;

  public
    constructor Create(Value: TBoolean); reintroduce; virtual;

    function    CopyAlterTableSpecification(): TSqlAlterTableSpecification; override;
    function    CopySetSupportsTransactions(): TSqlSetSupportsTransactions;

    property    Value: TBoolean read FValue;
  end;

  TSqlAlterTable = class(TSqlTableDefinitionStatement)
  private
    function    GetIdentifier(): TText;

  public
    Table:          TSqlTable;
    Specifications: TList<TSqlAlterTableSpecification>;

    constructor Create(Table: TSqlTable); reintroduce; virtual;
    destructor  Destroy(); override;

    function    CopyTableDefinitionStatement(): TSqlTableDefinitionStatement; override;
    function    CopyAlterTable(): TSqlAlterTable;

    property    Identifier: TText read GetIdentifier;
  end;

implementation

uses
  Object_.List,
  Object_.Reference.Counter;

{ TSqlAlterTable }

function TSqlAlterTable.CopyAlterTable(): TSqlAlterTable;
var
  Specification: TSqlAlterTableSpecification;
begin
  Result := TSqlAlterTable.Create(Table);

  for Specification in Specifications do
    Result.Specifications.Add(Specification.CopyAlterTableSpecification());
end;

function TSqlAlterTable.CopyTableDefinitionStatement(): TSqlTableDefinitionStatement;
begin
  Result := CopyAlterTable();
end;

constructor TSqlAlterTable.Create(Table: TSqlTable);
begin
  inherited Create();

  Self.Table := Table;

  Specifications := TObjectList<TSqlAlterTableSpecification>.Create();
  Specifications.ElementManager := TReferenceCounter<TSqlAlterTableSpecification>.Create();
end;

destructor TSqlAlterTable.Destroy();
begin
  Specifications.Free();

  inherited Destroy();
end;

function TSqlAlterTable.GetIdentifier(): TText;
begin
  Result := Table.Identifier;
end;

{ TSqlAddColumn }

function TSqlAddColumn.CopyAlterTableSpecification(): TSqlAlterTableSpecification;
begin
  Result := CopyAddColumn();
end;

constructor TSqlAddColumn.Create(Column: TSqlTableColumn);
begin
  inherited Create();

  Self.Column := Column;
end;

{ TSqlDropColumn }

function TSqlDropColumn.CopyAlterTableSpecification(): TSqlAlterTableSpecification;
begin
  Result := CopyDropColumn();
end;

function TSqlDropColumn.CopyDropColumn(): TSqlDropColumn;
begin
  Result := TSqlDropColumn.Create(Identifier);
end;

constructor TSqlDropColumn.Create(Identifier: TText);
begin
  inherited Create();

  Self.Identifier := Identifier;
end;

{ TSqlAlterTableSpecification }

function TSqlAlterTableSpecification.Copy(): TSqlExpression;
begin
  Result := CopyAlterTableSpecification();
end;

{ TSqlAlterColumn }

function TSqlAlterColumn.CopyAlterTableSpecification(): TSqlAlterTableSpecification;
begin
  Result := CopyAlterColumn();
end;

function TSqlAlterColumn.CopyAlterColumn(): TSqlAlterColumn;
begin
  Result := TSqlAlterColumn.Create(Self.Column);

  Result.Identifier := Self.Identifier;
  Result.ColumnType := Self.ColumnType;
  Result.Nullable   := Self.Nullable;
  Result.First      := Self.First;
  Result.After      := Self.After;
end;

constructor TSqlAlterColumn.Create(Column: TSqlTableColumn);
begin
  inherited Create();

  Self.Column := Column;
end;

destructor TSqlAlterColumn.Destroy();
begin
  ColumnType.ReleaseReference();

  inherited Destroy();
end;

procedure TSqlAlterColumn.SetColumnType(const Value: TType);
begin
  if Value <> ColumnType then
  begin
    Value.AddReference();
    ColumnType.ReleaseReference();

    FColumnType := Value;
  end;
end;

{ TSqlAddColumnFirst }

function TSqlAddColumnFirst.CopyAddColumn(): TSqlAddColumn;
begin
  Result := CopyAddColumnFirst();
end;

function TSqlAddColumnFirst.CopyAddColumnFirst(): TSqlAddColumnFirst;
begin
  Result := TSqlAddColumnFirst.Create(Column);
end;

{ TSqlAddColumnAfter }

function TSqlAddColumnAfter.CopyAddColumn(): TSqlAddColumn;
begin
  Result := CopyAddColumnAfter();
end;

function TSqlAddColumnAfter.CopyAddColumnAfter(): TSqlAddColumnAfter;
begin
  Result := TSqlAddColumnAfter.Create(Column, After);
end;

constructor TSqlAddColumnAfter.Create(Column: TSqlTableColumn; const After: TText);
begin
  inherited Create(Column);

  Self.After := After;
end;

{ TSqlAddColumnLast }

function TSqlAddColumnLast.CopyAddColumn(): TSqlAddColumn;
begin
  Result := CopyAddColumnLast();
end;

function TSqlAddColumnLast.CopyAddColumnLast(): TSqlAddColumnLast;
begin
  Result := TSqlAddColumnLast.Create(Column);
end;

{ TSqlDropPrimaryKey }

function TSqlDropPrimaryKey.CopyAlterTableSpecification(): TSqlAlterTableSpecification;
begin
  Result := CopyDropPrimaryKey();
end;

function TSqlDropPrimaryKey.CopyDropPrimaryKey(): TSqlDropPrimaryKey;
begin
  Result := TSqlDropPrimaryKey.Create();
end;

{ TSqlDropKey }

function TSqlDropIndex.CopyAlterTableSpecification(): TSqlAlterTableSpecification;
begin
  Result := CopyDropIndex();
end;

function TSqlDropIndex.CopyDropIndex(): TSqlDropIndex;
begin
  Result := TSqlDropIndex.Create(Name);
end;

constructor TSqlDropIndex.Create(Name: TText);
begin
  inherited Create();

  Self.Name := Name;
end;

{ TSqlAddKey }

function TSqlAddKey.CopyAddKey(): TSqlAddKey;
begin
  Result := TSqlAddKey.Create(Key);
end;

function TSqlAddKey.CopyAlterTableSpecification(): TSqlAlterTableSpecification;
begin
  Result := CopyAddKey();
end;

constructor TSqlAddKey.Create(Key: TSqlTableKey);
begin
  inherited Create();

  Self.Key := Key;
end;

{ TSqlRenameTable }

function TSqlRenameTable.CopyRenameTable(): TSqlRenameTable;
begin
  Result := TSqlRenameTable.Create(Identifier);
end;

function TSqlRenameTable.CopyAlterTableSpecification(): TSqlAlterTableSpecification;
begin
  Result := CopyRenameTable();
end;

constructor TSqlRenameTable.Create(Identifier: TText);
begin
  inherited Create();

  Self.Identifier := Identifier;
end;

{ TSqlSetAutoIncrement }

function TSqlSetAutoIncrement.CopyAlterTableSpecification(): TSqlAlterTableSpecification;
begin
  Result := CopySetAutoIncrement();
end;

function TSqlSetAutoIncrement.CopySetAutoIncrement(): TSqlSetAutoIncrement;
begin
  Result := TSqlSetAutoIncrement.Create(Value);
end;

constructor TSqlSetAutoIncrement.Create(Value: TInteger32);
begin
  inherited Create();

  Self.Value := Value;
end;

{ TSqlSetSupportsTransactions }

function TSqlSetSupportsTransactions.CopyAlterTableSpecification(): TSqlAlterTableSpecification;
begin
  Result := CopySetSupportsTransactions();
end;

function TSqlSetSupportsTransactions.CopySetSupportsTransactions(): TSqlSetSupportsTransactions;
begin
  Result := TSqlSetSupportsTransactions.Create(Value);
end;

constructor TSqlSetSupportsTransactions.Create(Value: TBoolean);
begin
  inherited Create();

  FValue := Value;
end;

{ TSqlDisableKeys }

function TSqlDisableKeys.CopyAlterTableSpecification(): TSqlAlterTableSpecification;
begin
  Result := CopyDisableKeys();
end;

function TSqlDisableKeys.CopyDisableKeys(): TSqlDisableKeys;
begin
  Result := TSqlDisableKeys.Create();
end;

{ TSqlEnableKeys }

function TSqlEnableKeys.CopyAlterTableSpecification(): TSqlAlterTableSpecification;
begin
  Result := CopyEnableKeys();
end;

function TSqlEnableKeys.CopyEnableKeys(): TSqlEnableKeys;
begin
  Result := TSqlEnableKeys.Create();
end;

end.