FireDAC 下的 Sqlite [3]

在空白窗体上添加: TFDConnection, TFDPhysSQLiteDriverLink, TFDGUIxWaitCursor, TMemo

---

procedure TForm1.FormCreate(Sender: TObject);
var
  List: TStrings;
  V: Variant;
begin
  FDConnection1.Open('DriverID=SQLite; Database=C:TempFDDemo.sdb');

  List := TStringList.Create;

  FDConnection1.GetInfoReport(List);
  Memo1.Clear;
  Memo1.Lines.Add('==> 获取连接信息:');
  Memo1.Lines.AddStrings(List);

  FDConnection1.GetTableNames('', '', '', List);
  Memo1.Lines.Add(#13#10'==> 获取数据库中的表名列表:');
  Memo1.Lines.AddStrings(List);

  FDConnection1.GetTableNames('', '', '', List, [], [tkView]);
  Memo1.Lines.Add(#13#10'==> 获取数据库中的查询名列表:');
  Memo1.Lines.AddStrings(List);

  FDConnection1.GetFieldNames('', '', 'Orders', '', List);
  Memo1.Lines.Add(#13#10'==> 获取 Orders 表中的字段名列表:');
  Memo1.Lines.AddStrings(List);

  V := FDConnection1.ConnectionMetaDataIntf.GetTables([], [tkTable], '', '', '').Rows[0].GetData(0);
  Memo1.Lines.Add(#13#10'==> 获取第一个表中第一列的第一个数据:');
  Memo1.Lines.Add(V);

  List.Free;
end;

---

{结果如下:}
{...............................................................
==> 获取连接信息:
================================
Connection definition parameters
================================
Name=Unnamed
DriverID=SQLite
Database=C:TempFDDemo.sdb
================================
FireDAC info
================================
Tool = RAD Studio XE6
FireDAC = 10.0.1 (Build 69712)
Platform = Windows 32 bit
Defines = FireDAC_NOLOCALE_META;FireDAC_MONITOR
================================
Client info
================================
Loading driver SQLite ...
DLL = 
Client version = 3.8.3.1
Compile options = ENABLE_COLUMN_METADATA;ENABLE_FTS3;
  ENABLE_FTS3_PARENTHESIS;ENABLE_FTS4;ENABLE_RTREE;
  ENABLE_STAT4;HAS_CODEC;OMIT_AUTOINIT;
  OMIT_DEPRECATED;SYSTEM_MALLOC;TEMP_STORE=2;
  THREADSAFE=2
================================
Session info
================================
Current catalog = 
Current schema = 
Total changes = 0
Database encoding = UTF8
Encryption mode = 
Cache size = 10000

==> 获取数据库中的表名列表:
Categories
CustomerCustomerDemo
CustomerDemographics
Customers
Employees
EmployeeTerritories
FDQA_all_types
FDQA_ascii_types
FDQA_batch_test
FDQA_bcd
FDQA_blob
FDQA_Categories
FDQA_db_types
FDQA_details_autoinc
FDQA_FK_tab
FDQA_ForAsync
FDQA_identity_tab
FDQA_locktable
FDQA_map1
FDQA_map2
FDQA_map3
FDQA_map4
FDQA_master_autoinc
FDQA_Maxlength
FDQA_novalstable
FDQA_numbers
FDQA_OrderDetails
FDQA_parambind
FDQA_Products
FDQA_tabwithpk
FDQA_timestamp
FDQA_transtable
FDQA_V_Test
FDQA_WString
"Order Details"
Orders
Products
Region
Shippers
Suppliers
Territories

==> 获取数据库中的查询名列表:
FDQA_V_Test

==> 获取 Orders 表中的字段名列表:
OrderID
CustomerID
EmployeeID
OrderDate
RequiredDate
ShippedDate
ShipVia
Freight
ShipName
ShipAddress
ShipCity
ShipRegion
ShipPostalCode
ShipCountry

==> 获取第一个表中第一列的第一个数据:
1
...............................................................}

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FireDAC 下主要有四个 SQLite 的相关单元: 
FireDAC.Phys.SQLiteCli     // 最底层的 API; 利用它可以像 C 语言一样写程序
FireDAC.Phys.SQLiteWrapper // 主功能包装;   利用它可以像 C++ 一样写程序; 这可能是我以后使用最多的
FireDAC.Phys.SQLiteMeta    // 元信息包装
FireDAC.Phys.SQLite        // 实现 FireDAC 相关接口; 使用 FireDAC 的方式操作 SQLite 可能是最简单的, 更重要的是: FireDAC 操作所有数据库的方法是一样的

FireDAC.Phys.SQLiteWrapper 提供的 TSQLiteDatabase 类表示 SQLite 数据库, 使用它时一般无须创建,
直接从 FDConnection1.CliObj 或 FDConnection1.ConnectionIntf.CliObj 转换即可.

{示例:通过 TSQLiteDatabase 类获取 CharacterSet}
uses FireDAC.Phys.SQLiteWrapper;

procedure TForm1.Button1Click(Sender: TObject);
var
  db: TSQLiteDatabase;
begin
  db := TSQLiteDatabase(FDConnection1.CliObj); //假定 FDConnection1 已连接
  ShowMessage(db.CharacterSet); //UTF8
end;

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