various mathematical operations, such as LOG(), EXP() and so on, and aggregate functions using a high precision numeric argument, will be DECFLOAT(34). 3.3.1. NUMERIC Data Type Declaration Format caches) open after the last connection to that database was closed. This can help to improve performance at low cost, when the database is opened and closed frequently, by keeping resources “warm” for in triggers for adding and updating data. It may reduce the performance of inserting/updating records, but it will increase the performance of data selection. Defining an Array Column • If the column

значения устанавливаются в BEFORE INSERT триггере. Примеры: INSERT INTO journal DEFAULT VALUES RETURNING entry_id RETURNING Оператор INSERT вставляющий только одну строку может TABLE journal ( jrn_id INTEGER NOT NULL PRIMARY KEY, jrn_lastuser VARCHAR(40), jrn_lastaddr VARCHAR(255), jrn_lasttran INTEGER ); SET TERM ^; CREATE TRIGGER UI_JOURNAL FOR JOURNAL BEFORE 'Trn_ID'); END^ SET TERM ;^ EXECUTE PROCEDURE set_context('skidder', 1); INSERT INTO journal(jrn_id) VALUES(0); COMMIT; См. также: RDB$GET_CONTEXT. Математические

in triggers for adding and updating data. It may reduce the performance of inserting/updating records, but it will increase the performance of data selection. Defining an ARRAY Column • If the column key set.  A descending index can be useful on a column that will be subjected to searches on the high values (“newest”, maximum, etc.) Computed (Expression) Indexes In creating an index, you can use providing required field values must not depend on the presence of input values. Example INSERT INTO journal DEFAULT VALUES RETURNING entry_id; Chapter 6. Data Manipulation (DML) Statements 238 6.2.4.

Feldwerte bereitstellen, nicht vom Vorhandensein von Eingabewerten abhängen. Beispiel INSERT INTO journal DEFAULT VALUES RETURNING entry_id; 6.2.4. Die RETURNING-Klausel Eine INSERT-Anweisung, die höchstens wal_err_logwrite WAL I/O error. Please see Firebird log. -250 335544523 wal_err_jrn_comm WAL writer - Journal server communication error. Please see Firebird log. -251 335544524 wal_err_expansion WAL buffers GDSCODE Symbol Message Text -820 335544437 wrodynver wrong DYN version -820 335544467 high_minor minor version too high found @1 expected @2 -820 335544881 need_difference Difference file name should be

HDR_root_file_name 0x01 Original name of the root file for this database. HDR_journal_server 0x02 Name of the journal server. HDR_file 0x03 Secondary file name. HDR_last_page 0x04 Last logical page 0x06 Number of transactions between sweep. HDR_log_name 0x07 Replay log name. HDR_journal_file 0x08 Intermediate journal filename. Chapter 4. Database Header Page — Type 0x01 12 Type Name Value Description

allocated to store (cache) database pages in memory to help improve the efficiency of the database performance. It is far quicker to read data from memory that it is to have to physically read the data from don’t consider page buffers value as an ultimate parameter to improve Firebird’s performance, and don’t set it too high without clear understanding what are you doing. The setting applies only to the page becoming completely empty, then it can be used for any purpose within the database. • The performance of the database may be affected while the sweep is in progress.  Theoretically, it is possible

........................................................................................... 8 Performance .............................................................................................. executing the view's trigger code and again executing the table's trigger code. This situation caused performance problems or exceptions, particularly if blobs were involved. Now, if you define triggers for a if the backup subsequently turns out to be unrestorable. Performance The following changes should be noted as possible sources of performance loss: Existence Predicates NOT IN and ALL May Be Slow Firebird

присваивающие значения таким столбцам, не должны зависеть от наличия входных значений. Пример: INSERT INTO JOURNAL DEFAULT VALUES 117 Руководство по языку SQL RETURNING ENTRY_ID Предложение RETURNING Доступно:

sup- port. Better performance in case of a small number of multiple connections that do not influence each other. No SMP support. On multi-processor Windows ma- chines, performance can even drop dramatically overwhelming), just pick one or the other. In most circumstances, chances are that you won't notice a performance differ- ence. Besides, you can always switch to the other architecture later; your applications objects. However, just because you can does not say you should. The Firebird engine imple- ments a high-level subset of SQL (DDL) for the purpose of defining and operating on metadata ob- jects, typically

multi-processor) sup- port. Better performance in case of a small number of connections that do not influ- ence each other. No SMP support. On multi-processor Win- dows machines, performance can even drop dramatically events with a firewall or tunnel). In most circumstances, chances are that you won't notice a performance difference. Note that you can always switch to the other architecture later; your applications user-defined objects. However, just because you can does not say you should. The Firebird engine implements a high-level subset of SQL (DDL) for the purpose of defining and operating on metadata objects, typically