Firebird 2.1 Language Reference Update

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With a special attribute (case-sensitive!): create collation es_es_ci_compr for iso8859_1 from es_es case insensitive 'DISABLE-COMPRESSIONS=0' Tip DDL statements If you want to add a new character set with its default collation in your database, declare and run the stored procedure sp_register_character_set(name, max_bytes_per_character), found in misc/intl. sql under your Firebird installation directory. Please note: in order for this to work, the character set must be present on your system and registered in a .conf file in the intl subdirectory. DROP COLLATION Available in: DSQL Added in: 2.1 Description: Removes a collation from the database. Only user-added collations can be removed in this way. Syntax: DROP COLLATION name Tip Available in: DSQL Added in: 2.0 If you want to remove an entire character set with all its collations from your database, declare and run the stored procedure sp_unregister_character_set(name), found in misc/intl.sql under your Firebird installation directory. COMMENT Description: Allows you to enter comments for metadata objects. The comments will be stored in the various RDB$DESCRIPTION text BLOB fields in the system tables, from where client applications can pick them up. Syntax: COMMENT ON IS {'sometext' | NULL} ::= DATABASE | objectname 17
Examples: DDL statements | COLUMN relationname.fieldname | PARAMETER procname.paramname ::= CHARACTER SET | COLLATION | DOMAIN | EXCEPTION | EXTERNAL FUNCTION | FILTER | GENERATOR | INDEX | PROCEDURE | ROLE | SEQUENCE | TABLE | TRIGGER | VIEW Note If you enter an empty comment (''), it will end up as NULL in the database. comment on database is 'Here''s where we keep all our customer records.' comment on table Metals is 'Also for alloys' comment on column Metals.IsAlloy is '0 = pure metal, 1 = alloy' comment on index ix_sales is 'Set inactive during bulk inserts!' CREATE DATABASE Available in: DSQL, ESQL Syntax (partial): CREATE {DATABASE | SCHEMA} ... [PAGE_SIZE [=] size] ... [DIFFERENCE FILE 'filepath'] size ::= 4096 | 8192 | 16384 DATABASE • If the user supplies a size smaller than 4096, it will be silently converted to 4096. Other numbers not equal to any of the supported sizes will be silently converted to the next lower supported size. 16 Kb page size supported, 1 and 2 Kb deprecated Changed in: 1.0, 2.1 Description: Firebird 1.0 has raised the maximum database page size from 8192 to 16384 bytes. In Firebird 2.1 and up, page sizes 1024 and 2048 are deprecated as inefficient. Firebird will no longer create databases with these page sizes, but it will connect to existing small-page databases without any problem. 18
Page 1 and 2: Firebird 2.1 Language Reference Upd
Page 4 and 5: Table of Contents 1. Introduction .
Page 6 and 7: Firebird 2.1 Language Ref. Update F
Page 8 and 9: Firebird 2.1 Language Ref. Update A
Page 10 and 11: Firebird 2.1 Language Ref. Update s
Page 12 and 13: Chapter 1 Introduction Subject matt
Page 14 and 15: Chapter 2 Reserved words and keywor
Page 16 and 17: LOCK LOG LOG10 LPAD MATCHED MATCHIN
Page 18 and 19: Chapter 3 Available in: DSQL, PSQL
Page 20 and 21: Example: select name, age, case upp
Page 22 and 23: Data types and subtypes • Partial
Page 24 and 25: Added in: 1.0, 1.5, 1.5.1, 2.0, 2.1
Page 26 and 27: Chapter 5 DDL statements The statem
Page 30 and 31: DIFFERENCE FILE parameter Added in:
Page 32 and 33: CREATE DOMAIN Available in: DSQL, E
Page 34 and 35: Example: DDL statements create exce
Page 36 and 37: Syntax: Example: ALTER EXTERNAL FUN
Page 38 and 39: DDL statements -- the following que
Page 40 and 41: DDL statements PROCEDURE A stored p
Page 42 and 43: DDL statements Description: Firebir
Page 44 and 45: DDL statements NOT NULL in variable
Page 46 and 47: CREATE GENERATOR Available in: DSQL
Page 48 and 49: Better alternative: DROP SEQUENCE D
Page 50 and 51: ) DDL statements lastname varchar(2
Page 52 and 53: USING INDEX subclause Available in:
Page 54 and 55: ALTER COLUMN: SET DEFAULT Available
Page 56 and 57: UNIQUE constraints now allow NULLs
Page 58 and 59: Example: DDL statements create trig
Page 60 and 61: Multi-action triggers Added in: 1.5
Page 62 and 63: NOT NULL in variable declarations C
Page 64 and 65: DDL statements Restriction on recre
Page 66 and 67: DDL statements got a chance to put
Page 68 and 69: ORDER BY Available in: DSQL, PSQL A
Page 70 and 71: DML statements ROWS can also be use
Page 72 and 73: DML statements COLLATE in variable
Page 74 and 75: The same call in ESQL (with obligat
Page 76 and 77: DML statements Description: A SELEC
Page 78 and 79:
DML statements Aggregate functions
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Syntax: Example: Notes: ::= DML
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DML statements select d.dept_no, d.
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DML statements FIRST and SKIP are b
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DML statements select strlen(lastna
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DML statements Description: A natur
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DML statements • Only non-negativ
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Example: DML statements plan (MyTab
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UNIONs in subqueries Changed in: 2.
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Restrictions DML statements • The
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DML statements Description: Limits
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Chapter 7 Available in: DSQL Added
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Transaction control statements If t
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Transaction control statements •
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Chapter 8 PSQL statements PSQL - Pr
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PSQL statements • If sql_datatype
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Warning PSQL statements If you chan
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PSQL statements exception ex_bad_ty
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PSQL statements as declare variable
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Examples: PSQL statements thoroughl
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leave; end end c = 0; PSQL statemen
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Chapter 9 Available in: DSQL, PSQL
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Changed in: 2.0 Context variables D
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Context variables its execution was
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Context variables Description: OLD
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Chapter 10 Changed in: 2.0 Operator
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UNION as subselect Changed in: 2.0
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Chapter 11 Aggregate functions Aggr
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Chapter 12 Available in: DSQL, PSQL
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• If the argument is NULL, NULL i
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Result type: INTEGER or BIGINT Synt
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Result type: INTEGER Syntax: BIT_LE
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Internal functions This gives you c
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Available in: DSQL, PSQL Added in:
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Page 148 and 149:
Example: The equivalent CASE constr
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WEEK Bug alert Internal functions M
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Added in: 2.1 Internal functions De
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Internal functions • If x is nega
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Examples: Internal functions lpad (
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Internal functions This will return
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Internal functions overlay ('Goodby
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Page 164 and 165:
Internal functions Description: Cre
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Internal functions reverse ('Was it
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Added in: 2.1 Internal functions De
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Syntax: SINH (number) Important Int
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Page 174 and 175:
Notes: Internal functions • If th
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Description: Returns the arc cosine
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Declaration: External functions (UD
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Library: ib_udf Changed in: 1.0, 2.
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Better alternative: Internal functi
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External functions (UDFs) Descripti
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Syntax: cot (angle) Declaration: Ex
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Declaration: External functions (UD
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Library: ib_udf Added in: IB Change
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Changed in: 1.5, 1.5.2, 2.0 Better
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External functions (UDFs) DECLARE E
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See sright. Library: fbudf Added in
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Notes: External functions (UDFs) Fo
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Syntax: sign (number) Declaration:
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Library: fbudf Added in: 1.0 (Win),
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Notes: External functions (UDFs) th
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Better alternative: Internal functi
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Appendix A: Notes Character set NON
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Table A.1. How TPB settings affect
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Notes A note on CSTRING parameters
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Notes Maximum number of indices in
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Document History DDL statements ::
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Document History Internal functions
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Appendix C: License notice The cont
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Firebird 2.1 Language Reference Update

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