Firebird Generator Guide A guide on how and when to use generators in Firebird Frank Ingermann Version 0.3, 27 June 2020 Table of Contents 1. Introduction. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 3.2. Use of generator statements. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 4.3. Can you re-use generator values?. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 493 8.12.4. RDB$ROLE_IN_USE() . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . delimited with single quotes (apostrophes). ◦ Generator values are stored as 64-bit integers.  Use of Dialect 3 is strongly recommended for newly developed databases and applications. Both database Language Elements. 2.5. Operators and Special Characters A set of special characters is reserved for use as operators or separators. ::= | " | % | & | ' | ( | ) | * | + | , | -

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29 7.5. Use of 'stdin' or 'stdout' File Names . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . name> Allows the specification of the role to be used by the connecting user. Not of much practical use and is not normally used in practice. -U[SER] Allows the username of the SYSDBA or database from the above that a valid username and password must be defined on the command line, or by the use of environment variables ISC_USER and ISC_PASSWORD. This version of the command will exit with a error

became clear that the open source, non-commercial Firebird community would never be granted right of use. The two important books from the InterBase 6 published set were the Data Definition Guide and the delimited with single quotes (apostrophes). ◦ Generator values are stored as 64-bit integers.  Use of Dialect 3 is strongly recommended for newly developed databases and applications. Both database and Subtypes. 2.5. Operators and Special Characters A set of special characters is reserved for use as operators or separators. ::= | " | % | & | ' | ( | ) | * | + | , | -

2.2. Testing for NULL If you want to know whether a variable, field or other expression is NULL, use the following syntax: IS [NOT] NULL Examples: if ( MyField is null ) then YourString Total = A + B + C where A + B + C is not null delete from Phonebook where PhoneNum is null Do not use “… = NULL” to test for nullness. This syntax is illegal in Firebird versions up to 1.5.n, and gives really wrong — it just doesn’t give you what you want. The same goes for “… <> NULL”, so don’t use that either; use IS NOT NULL instead. IS NULL and IS NOT NULL always return true or false; they never return

org/en/documentation/. Some warnings before you start • Firebird 2.0.2 was recalled due to a regression; if you use it, upgrade to 2.0.3 or higher ASAP and make sure to read your new version's Release Notes. • If you open-source database management system, but “free” does not mean that everything is per- mitted. The use of Firebird is governed by two licenses: the IPL (InterBase Public License) and the IDPL (Initial Developer's improvements made by the Firebird Project. Both licenses offer similar rights and restrictions. In short: • Use of the software is free, even for commercial purposes. You may also redistribute the software, separately

open-source database management system, but “free” does not mean that everything is permitted. The use of Firebird is governed by two licenses: the IPL (InterBase Public License) and the IDPL (Initial improvements made by the Firebird Project. Both licenses offer similar rights and restrictions. In short: • Use of the software is free, even for commercial purposes. You may also redistribute the software, separately Firebird 4 security database, it is also possible to copy the security4.fdb to security5.fdb and use gfix -upgrade to upgrade from ODS 13.0 to ODS 13.1, but we recommend using the backup and restore

longer Known Compatibility Issues 2 visible in the workspace where you are installing Firebird--use the SET FIREBIRD command in a Windows shell or printenv FIREBIRD in a POSIX shell. Security in not the table identifier, must be used to qualify columns; or no alias is used. Use of an alias makes it invalid to use the table identifier to qualify a column. 2. Columns can now be used without qualifiers will correctly report an error that the field “RDB$RELATIONS.RDB $RELATION_NAME” could not be found. Use this (preferred): SELECT R.RDB$RELATION_NAME FROM RDB$RELATIONS R or this statement:

buffers and so on. Gfix is a general purpose tool for system administrators (and database owners) to use to make various 'system level' changes to their databases. Almost all the gfix commands have the -tra(nsaction) shutdown transaction startup -tru(sted) use trusted authentication -u(se) use full or reserve space for versions -user default user name characters Chapter 2. Command Line Options 4 Chapter 3. Gfix Commands  In the following discussion, I use the full parameter names in all examples. This is not necessary as each command can be abbreviated

provides reference material for the Firebird Interactive SQL Utility (isql), and instructions on how to use it to perform tasks within the database.  This manual is a work in progress. It is subject to change database functions.  Because other applications in the Linux environment, for example, MySQL, also use isql as a utility name, you are advised to run the Firebird utility from its own directory, or provide isql Use CONNECT or CREATE DATABASE to specify a database SQL> CONNECT "C:\DATABASES\FIREBIRD\MY_EMPLOYEE.FDB" CON> user 'SYSDBA' password 'secret';  Here and elsewhere in this document, we use the ‘$’