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Interbase 6.0 executeing SQL

Posted on 2001-06-24
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Last Modified: 2010-04-06
How can i execute SQL-Scripts from Delphi ?
i would like to generate a Table from within my application, but the Table has some Triggers.

for example :

CREATE TABLE "PA"
(
  "ID"     INTEGER NOT NULL,
  "PID"     INTEGER,
  "TIMESTAMPS"     INTEGER,
  "BS"     SMALLINT,
 PRIMARY KEY ("ID")
);
SET TERM ^ ;


/* Triggers only will work for SQL triggers */

CREATE TRIGGER "PA_INSERT" FOR "PA"
ACTIVE BEFORE INSERT POSITION 0
AS
BEGIN
 NEW.TIMESTAMPS = GEN_ID(UID, 1);
END
 ^

CREATE TRIGGER "PA_UPDATE" FOR "PA"
ACTIVE BEFORE UPDATE POSITION 0
AS
BEGIN
 NEW.TIMESTAMPS = GEN_ID(UID, 1);
END
 ^

COMMIT WORK ^
SET TERM ;^
0
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Question by:Andi4553
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1 Comment
 
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Accepted Solution

by:
z_darius earned 100 total points
ID: 6223243
you need the following objects on the form along with properties as suggested below

1. give yourself a button:

object Button1: TButton

2. drop an IBDatabase component on the form
 
object IBDatabase1: TIBDatabase
    Connected = True
    DatabaseName = 'D:\zz\Work\A21.GDB' //use your path
    Params.Strings = (
      'user_name=sysdba'  //use your login
      'password=somepassword') //use your password
    LoginPrompt = False
    SQLDialect = 1

3. drop and IBSQL component on the form:

object IBSQL1: TIBSQL
    Database = IBDatabase1
    ParamCheck = True
    SQL.Strings property
    SQL.Strings = (
      'CREATE TRIGGER PA_INSERT FOR PA '
      'ACTIVE BEFORE INSERT POSITION 0'
      'AS'
      'BEGIN'
      'NEW.TIMESTAMPS = GEN_ID(UID, 1);'
      'END'
      '')
    Transaction = IBTransaction1

4. finally and IBTransaction component:

  object IBTransaction1: TIBTransaction
    Active = True
    DefaultDatabase = IBDatabase1
  end

now using one of the onClick events do something similar to the code below:

procedure TForm1.Button1Click(Sender: TObject);
begin
  IBSQL1.ExecQuery;
  IBTransaction1.Commit;
end;

that's all. I verified this to work against IB6.
One last suggestion: do not use quotes around names of tables, fields in tables and other database objects in your SQL code.

for instance:
Wrong ---->>> :

CREATE TABLE "PA"
(
 "ID"     INTEGER NOT NULL,
 "PID"     INTEGER,
 "TIMESTAMPS"     INTEGER,
 "BS"     SMALLINT,
PRIMARY KEY ("ID")
);

Right ---->>> :
CREATE TABLE PA
(
 ID     INTEGER NOT NULL,
 PID     INTEGER,
 TIMESTAMPS     INTEGER,
 BS     SMALLINT,
PRIMARY KEY (ID)
);

Also, when creating a trigger which uses a generator, make sure you have created the generator first.

oh, and good luck !
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