Integer. Имя нашего генератора: GIDTEST. 4.4.1. Триггер Before Insert, версия 1 CREATE TRIGGER trgTTEST_BI_V1 for TTEST active before insert position 0 as begin new.id = gen_id(gidTest, 1); end Проблемы Использование генераторов для создания уникальных идентификаторов строк 14 CREATE TRIGGER trgTTEST_BI_V2 for TTEST active before insert position 0 as begin if (new.id is null) then begin new.id “по умолчанию” в каждой таблице. 4.4.3. Триггер Before Insert, версия 3 CREATE TRIGGER trgTTEST_BI_V3 for TTEST active before insert position 0 as begin if ((new.id is null) or (new.id = 0)) then

Our generator’s name is GIDTEST. 4.4.1. Before Insert trigger, version 1 CREATE TRIGGER trgTTEST_BI_V1 for TTEST active before insert position 0 as begin new.id = gen_id( gidTest, 1 ); end Problems when there was none in the INSERT: 4.4.2. Before Insert trigger, version 2 CREATE TRIGGER trgTTEST_BI_V2 for TTEST active before insert position 0 as begin if (new.id is null) then begin new.id generators to create unique row IDs 13 4.4.3. Before Insert trigger, version 3 CREATE TRIGGER trgTTEST_BI_V3 for TTEST active before insert position 0 as begin if ((new.id is null) or (new.id = 0)) then

Unser Generator heisst GIDTEST. 4.4.1. Before Insert Trigger, Version 1 CREATE TRIGGER trgTTEST_BI_V1 for TTEST active before insert position 0 as begin new.id = gen_id( gidTest, 1 ); end Probleme einer im INSERT-Befehl enthalten war: 4.4.2. Before Insert Trigger, Version 2 CREATE TRIGGER trgTTEST_BI_V2 for TTEST active before insert position 0 as begin if (new.id is null) then begin new.id Spalte in der Tabelle verwenden. 4.4.3. Before Insert Trigger, Version 3 CREATE TRIGGER trgTTEST_BI_V3 for TTEST active before insert position 0 as begin if ((new.id is null) or (new.id = 0)) then

позволяющая избежать написания фиктивных операторов. 93 Руководство по языку SQL Пример: CREATE TRIGGER BI_ATABLE FOR ATABLE ACTIVE BEFORE INSERT POSITION 0 AS BEGIN END Нет счётчика изменения метаданных для NULL, Y INTEGER NOT NULL); CREATE VIEW V_BASE AS SELECT X FROM BASE; SET TERM ^ ; CREATE TRIGGER BI_BASE FOR V_BASE ACTIVE BEFORE INSERT AS BEGIN IF (NEW.X IS NULL) THEN NEW.X = 33; INSERT INTO BASE своеобразная «заглушка», позволяющая избежать написания фиктивных операторов. Пример: CREATE TRIGGER BI_ATABLE FOR ATABLE ACTIVE BEFORE INSERT POSITION 0 AS BEGIN END BREAK Доступно: PSQL Добавлено:

written to the file: Chapter 5. Data Definition (DDL) Statements 146 SET TERM ^; CREATE TRIGGER bi_ext_log FOR ext_log ACTIVE BEFORE INSERT AS BEGIN IF (new.stamp is NULL) then new.stamp = CAST the name of the currently connected user. It is fully equivalent to USER. Example create trigger bi_customers for customers before insert as begin New.added_by = CURRENT_USER; New.purchases of the currently connected user. It is fully equivalent to CURRENT_USER. Example create trigger bi_customers for customers before insert as begin New.added_by = USER; New.purchases = 0; end Chapter

разделителя строки, каждый раз когда сообщение записывается в таблицу: SET TERM ^; CREATE TRIGGER bi_ext_log FOR ext_log ACTIVE BEFORE INSERT AS BEGIN IF (NEW.stamp IS NULL) THEN NEW.stamp = CAST USAGE на последовательность выданная триггеру GRANT USAGE ON SEQUENCE GEN_AGE TO TRIGGER TR_AGE_BI; -- Привилегия USAGE на исключение выданная пакету GRANT USAGE ON EXCEPTION E_ACCESS_DENIED TO PACKAGE USAGE на последовательность выданной триггеру REVOKE USAGE ON SEQUENCE GEN_AGE FROM TRIGGER TR_AGE_BI; -- Отзыв привилегии USAGE на исключение выданной пакету REVOKE USAGE ON EXCEPTION E_ACCESS_DENIED

jedes Mal zu schreiben, wenn eine Nachricht in die Datei geschrieben wird: SET TERM ^; CREATE TRIGGER bi_ext_log FOR ext_log ACTIVE BEFORE INSERT AS BEGIN IF (new.stamp is NULL) then new.stamp = CAST aktuell verbundenen Benutzers enthält. Es ist völlig äquivalent zu USER. Beispiel create trigger bi_customers for customers before insert as begin New.added_by = CURRENT_USER; New.purchases aktuell verbundenen Benutzers enthält. Es entspricht vollständig CURRENT_USER. Beispiel create trigger bi_customers for customers before insert as begin New.added_by = USER; New.purchases = 0; end Chapter

written to the file: Chapter 5. Data Definition (DDL) Statements 111 SET TERM ^; CREATE TRIGGER bi_ext_log FOR ext_log ACTIVE BEFORE INSERT AS BEGIN IF (new.stamp is NULL) then new.stamp = CAST the name of the currently connected user. It is fully equivalent to USER. Example create trigger bi_customers for customers before insert as begin New.added_by = CURRENT_USER; New.purchases of the currently connected user. It is fully equivalent to CURRENT_USER�. Example create trigger bi_customers for customers before insert as begin New.added_by = USER; New.purchases = 0; end Chapter