. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52 13. Write Ahead Log Page — Type 0x0a . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . pages in the database are in use and which are free. Up until Firebird 3.0, the next page is a Write Ahead Log page (page type 0x0a) but this page is wasted space, if present, and will most likely be dropped a shadow, or have the Firebird engine activate one automatically. Unfortunately, if a database write stores corrupt data in the database, the shadow file(s) will be identically corrupted. Because shadow

423 8.2.16. LOG(). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 423 8.2.17. LOG10(). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 731 RDB$LOG_FILES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . be used with expressions and values of the DECFLOAT type. They are: ABS CEILING EXP FLOOR LN LOG LOG10 POWER SIGN SQRT The aggregate functions SUM, AVG, MAX and MIN work with DECFLOAT data, as do all

16. LOG(). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 410 Inhaltsverzeichnis 8 8.2.17. LOG10() . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 657 RDB$LOG_FILES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Nachricht. Die dritte Spalte speichert das Zeilentrennzeichen: CREATE TABLE ext_log EXTERNAL FILE 'd:\externals\log_me.txt' ( stamp CHAR (24), message CHAR(100), crlf CHAR(2) -- for a Windows

335544487 walw_err WAL Writer error -231 335544488 logh_small Log file header of %s too small -232 335544489 logh_inv_version Invalid version of log file %s -233 335544490 logh_open_flag Log file %s not latest still set -234 335544491 logh_open_flag2 Log file %s not closed properly; database recovery may be required -235 335544492 logh_diff_dbname Database name in the log file %s is different -236 335544493 logf_unexpected_eof end of log file %s at offset %ld -237 335544494 logr_incomplete Incomplete log record at offset %ld in log file %s -238 335544495 logr_header_small Log record header too small at offset %ld in log file

335544487 walw_err WAL Writer error -231 335544488 logh_small Log file header of @1 too small -232 335544489 logh_inv_version Invalid version of log file @1 -233 335544490 logh_open_flag Log file @1 not latest still set -234 335544491 logh_open_flag2 Log file @1 not closed properly; database recovery may be required -235 335544492 logh_diff_dbname Database name in the log file @1 is different -236 335544493 logf_unexpected_eof end of log file @1 at offset @2 -237 335544494 logr_incomplete Incomplete log record at offset @1 in log file @2 -238 335544495 logr_header_small Log record header too small at offset @1 in log file @2

........................... 416 LOG ........................................................................................................................ 417 LOG10 ............................... ........................................................................................ 669 RDB$LOG_FILES ............................................................................................ и текстовое сообщение. Третий столбец хранит разделитель строки: CREATE TABLE ext_log EXTERNAL FILE 'd:\externals\log_me.txt' ( stamp CHAR(24), message CHAR(100), crlf CHAR(2) -- Для Windows

13. LOG(). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 319 Table of Contents 7 8.2.14. LOG10() . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 487 RDB$LOG_FILES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . involving the IS NULL predicate. An evaluation problem occurs when optional filters are used to write queries of the following type: WHERE col1 = :param1 OR :param1 IS NULL After processing, at the

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33 14. Database Write Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -me(nd) prepare corrupt database for backup -mo(de) read_only or read_write database -nol(inger) close database ignoring linger setting for it -n(o_update) default user name -v(alidate) validate database structure -w(rite) write synchronously or asynchronously -z print software version number Options

DECODE() EXP() EXTRACT() MILLISECOND WEEK FLOOR() GEN_ID() GEN_UUID() HASH() IIF() LEFT() LN() LOG() LOG10() LOWER() LPAD() MAXVALUE() MINVALUE() MOD() NULLIF() OCTET_LENGTH() OVERLAY() PI() 8 Руководство cosh 9 Руководство по языку SQL cot dow dpower floor getExactTimestamp i64round i64truncate ln log log10 lower lpad ltrim mod *nullif *nvl pi rand right round, i64round rpad rtrim sdow sign sin sinh sqrt STARTING, STARTS, STATEMENT, STATISTICS, SUB_TYPE, SUSPEND, TRANSACTION, UNCOMMITTED, WAIT, WORK и WRITE. • Более не зарезервированные и не ключевые слова: AUTODDL, BASE_NAME, BASED, BLOBEDIT,

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29 7.4. Gbak log file Cannot Be Overwritten . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . displayed. The default is to display the output to the screen, but you can redirect the output to a log file using the -y switch. -Y or the text "suppress" Used in conjunction with the -v[erify] The log file must not exist. If it does, the backup or recovery operation will fail: tux> rm employee.log tux> gbak -backup employee.fdb employee.fbk -y employee.log -v tux> ls -l employee.log -rw-r--r--