interact with the Firebird database. Some SET commands can be incorporated in DDL scripts to perform batch executions within isql. It also accepts DDL, DML and console commands. The isql utility can be used session; directly from the command line; and as a non-interactive session, using a shell script or batch file. Different tasks may be performed in each of the modes, as illustrated below: • An interactive interactively to: ◦ Create, update, query, and drop data or metadata. ◦ Input a script file containing a batch of SQL statements in sequence without prompting. ◦ Add and modify data. ◦ Grant user permissions

WHILE (I <= 5) DO BEGIN SELECT LANGUAGE_REQ[:I] FROM JOB WHERE (JOB_CODE = :CODE) AND (JOB_GRADE = :GRADE) AND (JOB_COUNTRY = :CTY) AND (LANGUAGE_REQ IS NOT NULL)) INTO COURSES WHERE START_DAY IS NOT DISTINCT FROM END_DAY; -- PSQL fragment IF (NEW.JOB IS DISTINCT FROM OLD.JOB) THEN POST_EVENT 'JOB_CHANGED'; See also IS [NOT] NULL, Boolean IS [NOT] Boolean IS [NOT] Available ITEMID INTEGER NOT NULL, CONSTRAINT MOD_UNIQUE UNIQUE (MODELNAME, ITEMID) ); 3. Creating the JOB table with a primary key constraint spanning two columns, a foreign key constraint for the COUNTRY

They began with the material from the LangRef Updates, which is voluminous. It was going to be a big job but, for all concerned, a spare-time one. Then, in 2013-4, two benefactor companies — MICEX amd IBSurgeon BEGIN SELECT LANGUAGE_REQ[:I] FROM JOB WHERE (JOB_CODE = :CODE) Chapter 3. Data Types and Subtypes 39 AND (JOB_GRADE = :GRADE) AND (JOB_COUNTRY = :CTY) AND (LANGUAGE_REQ IS ITEMID INTEGER NOT NULL, CONSTRAINT MOD_UNIQUE UNIQUE (MODELNAME, ITEMID) ); 3. Creating the JOB table with a primary key constraint spanning two columns, a foreign key Chapter 5. Data Definition

as begin new.id = gen_id( gidTest, 1 ); end Problems with trigger version 1: This one does the job all right — but it also “wastes” a generator value in cases where there is already an ID supplied What else to do with generators 16 monthly reports that are generated by a single module run in batch mode, this can be acceptable — as usual, it depends on your needs. If you want to use this technique

8.3. Execute batch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28 8.4. Release batch . . . . . . . 29 8.5. Cancel batch. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29 8.6. Sync batch . . . . . . . Int32 Minimum type (e.g. ptype_rpc = 2) Chapter 3. Databases 6 Int32 Maximum type (e.g. ptype_batch_send = 3) Int32 Preference weight (e.g. 2) Server Int32 Operation code If operation equals op_accept:

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 5. Batch Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18 7.2. Differences Between Batch And Interactive Mode. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18 7.3. Batch Mode Exit Codes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19 7.4. Errors In Batch Mode Swap To Interactive Mode. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

writes off (or disabled). It is sometimes resorted to in order to improve performance during large batch operations. The big warning here is: do not disable forced writes on a Windows server. It has been operation with forced writes disabled temporarily. Still, do not leave it disabled once your large batch task is completed, unless you have a very robust fall-back power system. 3. Restoring a backup to

off (or disabled). It is sometimes resorted to in an attempt to improve performance during large batch operations. Chapter 7. Protecting your data 40 Disabling forced writes on Windows The big warning operation with forced writes disabled temporarily. Still, do not leave it disabled once your large batch task is completed, unless you have a very robust fall- back power system. 7.2.2. Restoring a backup

writes off (or disabled). It is sometimes resorted to in order to improve performance during large batch operations. Disabling forced writes on Windows The big warning here is: do not disable forced writes operation with forced writes disabled temporarily. Still, do not leave it disabled once your large batch task is completed, unless you have a very robust fall-back power system. Warning It was recently

Forced Writes Off (= deaktiviert). Auf diese Konfiguration wird manchmal zurückgegriffen, um große Batch-Operationen zu beschleunigen. Die große Warnung ist nun: Deaktivieren Sie Forced Writes auf einem Wri- tes ausgeführt werden soll. Trotzdem, lassen Sie Forced Writes nicht deaktiviert, nachdem die Batch-Operatio- nen beendet wurde, solange Sie nicht über ein robustes Notstromsystem verfügen. Wiederherstellen