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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.Table.Physical;
interface
uses
Boolean,
Collection.List,
Sql.Database,
Sql.Expression,
Sql.Expression.Row,
Sql.Operator_.Assign,
Sql.Table,
Sql.Table.Column,
Sql.Table.Expression,
Text,
Type_;
type
TSqlPhysicalTable = class(TSqlTable)
private
FType: TType;
procedure SetType(const Value: TType);
protected
function ShouldCheckPrimaryKey(): TBoolean; override;
function CreateType(): TType;
property Type_: TType read FType write SetType;
public
InitialRows: TList<TSqlRow>;
constructor Create(const Identifier: TText); override;
destructor Destroy(); override;
function ToExpression(): TSqlTableExpression; override;
function GetType(): TType; override;
procedure Insert(Database: TSqlDatabase; Columns: TList<TSqlTableColumn>; Rows: TList<TSqlRow>); override;
procedure Update(Database: TSqlDatabase; Assignments: TList<TSqlAssign>; Restrictions: TList<TSqlExpression>); override;
procedure Delete(Database: TSqlDatabase; Restrictions: TList<TSqlExpression>); override;
end;
implementation
uses
Object_.List,
Object_.Reference.Counter,
Sql.Statement.DataManipulation,
Sql.Table.Expression.Alias,
Sql.Table.Expression.Reference,
Sql.Type_.Table;
{ TSqlPhysicalTable }
procedure TSqlPhysicalTable.Update(Database: TSqlDatabase; Assignments: TList<TSqlAssign>; Restrictions: TList<TSqlExpression>);
var
Update: TSqlUpdate;
begin
Update := TSqlUpdate.Create();
Update.Tables.Add(ToExpression());
Update.Assignments.AddAll(Assignments);
Update.Restrictions.AddAll(Restrictions);
Database.Query(Update);
end;
constructor TSqlPhysicalTable.Create(const Identifier: TText);
begin
inherited Create(Identifier);
Type_ := CreateType();
InitialRows := TObjectList<TSqlRow>.Create();
InitialRows.ElementManager := TReferenceCounter<TSqlRow>.Create();
end;
function TSqlPhysicalTable.CreateType(): TType;
var
Type_: TSqlTableType;
begin
Type_ := TSqlTableType.Create(Identifier);
Type_.Table := Self;
Result := Type_;
end;
procedure TSqlPhysicalTable.Delete(Database: TSqlDatabase; Restrictions: TList<TSqlExpression>);
var
Delete: TSqlDelete;
begin
Delete := TSqlDelete.Create();
Delete.TargetTables.Add(Self);
Delete.ReferenceTables.Add(ToExpression());
Delete.Restrictions.AddAll(Restrictions);
Database.Query(Delete);
end;
destructor TSqlPhysicalTable.Destroy();
begin
InitialRows.Free();
Type_.ReleaseReference();
inherited Destroy();
end;
function TSqlPhysicalTable.ToExpression(): TSqlTableExpression;
begin
Result := TSqlTableReference.Create(Self);
if AliasName <> '' then
Result := TSqlAliasedTableExpression.Create(Result, AliasName);
end;
function TSqlPhysicalTable.GetType(): TType;
begin
Result := Type_;
end;
procedure TSqlPhysicalTable.Insert(Database: TSqlDatabase; Columns: TList<TSqlTableColumn>; Rows: TList<TSqlRow>);
var
InsertStatement: TSqlInsertValues;
begin
InsertStatement := TSqlInsertValues.Create(Self);
InsertStatement.Columns.AddAll(Columns);
InsertStatement.Rows.AddAll(Rows);
Database.Query(InsertStatement);
end;
procedure TSqlPhysicalTable.SetType(const Value: TType);
begin
if Value <> Type_ then
begin
Value.AddReference();
Type_.ReleaseReference();
FType := Value;
end;
end;
function TSqlPhysicalTable.ShouldCheckPrimaryKey(): TBoolean;
begin
Result := True;
end;
end.
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