. . . . . . 22 2.3.1. Rules for Regular Object Identifiers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22 2.3.2. Rules for Delimited Object Identifiers . . . . . . . . . . . . . . . . . . . . . . . . . . . 617 14.1.1. SET BIND (Data Type Coercion Rules) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 617 14 integer) data type is not supported. ◦ Identifiers are case-insensitive and must always comply with the rules for regular identifiers — see the section Identifiers below. ◦ Although generator values are stored

(AND-operation); • In all other cases, NULL wins. If you have trouble remembering which constant rules which operation, look at the second letter: tRue prevails with oR — fAlse with And. 3.3. More logic ExprN ) The first result can be understood by writing out the entire expression as a disjunction (OR-chain) of equality tests: A=Expr1 or A=Expr2 or ... or A=ExprN which, if A is NULL, boils down to NULL some other elements are NULL. (Any falses, if present, are not in the way. In a disjunction, true rules.) • If none of the expressions in the list have the same value as A: ◦ “A IN( Expr1, Expr2, …, ExprN

. . . . . . 19 2.3.1. Rules for Regular Object Identifiers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20 2.3.2. Rules for Delimited Object Identifiers integer) data type is not supported. ◦ Identifiers are case-insensitive and must always comply with the rules for regular identifiers — see the section Identifiers below. ◦ Although generator values are stored are specific to SQL. To be valid, each type of identifier must conform to a set of rules, as follows: 2.3.1. Rules for Regular Object Identifiers • Length cannot exceed 31 characters • The name must

logh_inv_version Invalid version of log file %s -233 335544490 logh_open_flag Log file %s not latest in the chain but open flag still set -234 335544491 logh_open_flag2 Log file %s not closed properly; database

logh_inv_version Invalid version of log file @1 -233 335544490 logh_open_flag Log file @1 not latest in the chain but open flag still set -234 335544491 logh_open_flag2 Log file @1 not closed properly; database

possible that there will be a build up of enough back versions to fill the target page. When the chain of old versions gets too big, Firebird has to move the old versions to a different page which, if

below. Flag Name Flag value Description rhd_deleted 0x01 (bit 0) Record is logically deleted. rhd_chain 0x02 (bit 1) Record is an old version. rhd_fragment 0x04 (bit 2) Record is a fragment. rhd_incomplete

above: CHECK (DEPTNO IN (10, 20, 30) AND DEPTNO IS NOT NULL) DML Changed Ambiguity Rules in SQL A. Brinkman In summary, the changes are: 1. Known Compatibility Issues 5 When an alias Improvements The Firebird 2.1 series are built using the Microsoft MSVC8 compiler. Microsoft introduced new rules for distributing the runtimes associated with this compiler on XP and Vista platforms. This introduced full range of Windows server platforms from Windows 2000 onward. Over the past decade, some platform rules have become progressively complicated. What worked on W2K might not work on later Windows platforms

that violates the database’s consistency rules, the entire transaction will be rolled back and the database will be restored to a state consistent with those rules. If a transaction successfully executes it will take the database from one state that is consistent with the rules to another state that is also consistent with the rules, without necessarily preserving consistency at all intermediate levels Added in Firebird 3.0 SQL> SHOW MAPping [name] This command shows the authentication mapping rules defined in this database or in the security database. SQL> show mapping; WIN_ADMINS USING PLUGIN

@1. Неверная версия файла лога @1. -233 335544490 logh_open_flag Log file @1 not latest in the chain but open flag still set. Лог файл @1 не последний в цепочке, но флаг «открыт» еще установлен. -234