1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
|
unit frm_main;
{$mode objfpc}{$H+}
interface
uses
SysUtils, Classes,
fpg_main, fpg_widget, fpg_form, fpg_label, fpg_button,
fpg_memo, fpg_dialogs;
type
TMainForm = class(TfpgForm)
private
procedure btnCreateTableClick(Sender: TObject);
procedure btnDropTableClick(Sender: TObject);
procedure btnShowMetaDataClick(Sender: TObject);
procedure btnTableExistsClick(Sender: TObject);
public
{@VFD_HEAD_BEGIN: MainForm}
lblConnectedTo: TfpgLabel;
btnCreateTable: TfpgButton;
btnDropTable: TfpgButton;
btnShowMetaData: TfpgButton;
btnTableExists: TfpgButton;
memName1: TfpgMemo;
{@VFD_HEAD_END: MainForm}
constructor Create(AOwner: TComponent); override;
procedure AfterCreate; override;
end;
{@VFD_NEWFORM_DECL}
implementation
uses
tiQuery
,tiOPFManager
,tiOIDGUID
,tiDialogs
;
{@VFD_NEWFORM_IMPL}
procedure TMainForm.btnCreateTableClick(Sender: TObject);
var
LTableMetaData: TtiDBMetaDataTable;
begin
LTableMetaData:= TtiDBMetaDataTable.Create;
try
LTableMetaData.Name:= 'Client';
LTableMetaData.AddField('OID', qfkString, 36); // Using GUID OIDs
LTableMetaData.AddField('Client_Name', qfkString, 200);
LTableMetaData.AddField('Client_ID', qfkString, 9);
gTIOPFManager.CreateTable(LTableMetaData);
finally
LTableMetaData.Free;
end;
ShowMessage('Table ''Client'' created');
end;
procedure TMainForm.btnDropTableClick(Sender: TObject);
begin
gTIOPFManager.DropTable('Client');
ShowMessage('Table ''Client'' dropped');
end;
procedure TMainForm.btnShowMetaDataClick(Sender: TObject);
var
LTableMetaData: TtiDBMetaDataTable;
LDatabase : TtiDatabase;
begin
LTableMetaData:= TtiDBMetaDataTable.Create;
try
LTableMetaData.Name:= 'Client';
LDatabase:= gTIOPFManager.DefaultDBConnectionPool.Lock;
try
LDatabase.ReadMetaDataFields(LTableMetaData);
tiShowMessage(LTableMetaData.AsDebugString);
finally
gTIOPFManager.DefaultDBConnectionPool.UnLock(LDatabase);
end;
finally
LTableMetaData.Free;
end;
end;
procedure TMainForm.btnTableExistsClick(Sender: TObject);
var
LDBMetaData: TtiDBMetaData;
LDatabase : TtiDatabase;
begin
LDBMetaData:= TtiDBMetaData.Create;
try
LDatabase:= gTIOPFManager.DefaultDBConnectionPool.Lock;
try
LDatabase.ReadMetaDataTables(LDBMetaData);
if LDBMetaData.FindByTableName('Client') <> nil then
ShowMessage('Table <Client> exists')
else
ShowMessage('Table <Client> does not exist');
finally
gTIOPFManager.DefaultDBConnectionPool.UnLock(LDatabase);
end;
finally
LDBMetaData.Free;
end;
end;
constructor TMainForm.Create(AOwner: TComponent);
begin
inherited Create(AOwner);
lblConnectedTo.Text := 'Connected to: ' + gTIOPFManager.DefaultDBConnectionName;
end;
procedure TMainForm.AfterCreate;
begin
{@VFD_BODY_BEGIN: MainForm}
Name := 'MainForm';
SetPosition(738, 153, 389, 250);
WindowTitle := 'Create table demo';
WindowPosition := wpScreenCenter;
Sizeable := False;
lblConnectedTo := TfpgLabel.Create(self);
with lblConnectedTo do
begin
Name := 'lblConnectedTo';
SetPosition(4, 4, 380, 16);
Text := 'Connected To:';
FontDesc := '#Label1';
end;
btnCreateTable := TfpgButton.Create(self);
with btnCreateTable do
begin
Name := 'btnCreateTable';
SetPosition(280, 24, 103, 24);
Text := 'Create Table';
FontDesc := '#Label1';
ImageName := '';
OnClick := @btnCreateTableClick;
end;
btnDropTable := TfpgButton.Create(self);
with btnDropTable do
begin
Name := 'btnDropTable';
SetPosition(280, 52, 103, 24);
Text := 'Drop Table';
FontDesc := '#Label1';
ImageName := '';
OnClick := @btnDropTableClick;
end;
btnShowMetaData := TfpgButton.Create(self);
with btnShowMetaData do
begin
Name := 'btnShowMetaData';
SetPosition(280, 80, 103, 24);
Text := 'Show metadata';
FontDesc := '#Label1';
ImageName := '';
OnClick := @btnShowMetaDataClick;
end;
btnTableExists := TfpgButton.Create(self);
with btnTableExists do
begin
Name := 'btnTableExists';
SetPosition(280, 108, 103, 24);
Text := 'Table exists?';
FontDesc := '#Label1';
ImageName := '';
OnClick := @btnTableExistsClick;
end;
memName1 := TfpgMemo.Create(self);
with memName1 do
begin
Name := 'memName1';
SetPosition(4, 24, 264, 220);
Lines.Add('This demo will:');
Lines.Add('');
Lines.Add('a) Create a table called Client with the');
Lines.Add(' following structure:');
Lines.Add(' OID String(36)');
Lines.Add(' Client_Name String(200)');
Lines.Add(' Client_ID String(9)');
Lines.Add('');
Lines.Add('b) Test if a table called Client exists');
Lines.Add('');
Lines.Add('c) Show metadata for the Client table');
Lines.Add('');
Lines.Add('d) Drop the client table');
FontDesc := '#Edit1';
Enabled := False;
end;
{@VFD_BODY_END: MainForm}
end;
end.
|
