Firebird 2.1 Language Reference Update

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Document History Internal functions :: CHAR_LENGTH(), CHARACTER_LENGTH(): Added formalparas “Changed in” and “BLOB support”. Edited Note after Syntax block and placed it after Description. Internal functions :: EXTRACT(): Edited Result type and everything following the Syntax block, except the WEEK subsection. Internal functions :: HASH(): Mentioned full text BLOB support in Description. Internal functions :: LEFT(): Edited Result type. Edited first listitem and inserted a new listitem before it (about BLOB support). Internal functions :: LOWER(): Added “Changed in”. Edited Description (BLOB support, removed epithet “new”). Added BLOB as result type and corrected VAR(CHAR) -> (VAR)CHAR. Removed “new” from text under Declaration. Internal functions :: LPAD(): Replaced '' with “the empty string” in 2nd (now 4th) Syntax note. Inserted two new Syntax notes concerning BLOB support. Changed 1st sentence of Tip. Added Warning about possible high memory usage. Internal functions :: MAXVALUE(): Mentioned full text BLOB support in Description. Internal functions :: MINVALUE(): Mentioned full text BLOB support in Description. Internal functions :: OCTET_LENGTH(): Added formalparas “Changed in” and “BLOB support”. Edited Note after Description. Internal functions :: OVERLAY(): Edited Result type. Edited first listitem under Syntax and inserted another one before it, about BLOB support. Also added a listitem about NULL arguments. Added Warning about possible high memory usage. Internal functions :: POSITION(): Added “(1-based)” to Description. Added two listitems after Syntax. Added Warning about possible high memory usage. Internal functions :: RDB$GET_CONTEXT(): Replaced “general” with “global” (4x) in System namespace table. Internal functions :: REPLACE(): Edited Result type. Inserted new first listitem under Syntax and edited the previous first (now 2nd) listitem. Added example with NULL first argument. Aligned arguments in examples. Corrected last constant element, which accidentally spanned three lines instead of a single word. Added Warning about possible high memory usage. Internal functions :: RIGHT(): Edited Result type. Edited first listitem and inserted a new listitem before it (about BLOB support and bug). Added Warning about possible high memory usage. Internal functions :: RPAD(): Replaced '' with “the empty string” in 2nd (now 4th) Syntax note. Inserted two new Syntax notes concerning BLOB support. Changed 1st sentence of Tip. Added Warning about possible high memory usage. Internal functions :: SUBSTRING(): Added <strong>2.1</strong> to “Changed in”. Changed Result type. Edited Syntax. Rewrote most everything between Syntax and Examples. Added Warning about possible high memory usage. Internal functions :: TRIM(): Added “Changed in”. Edited Description and Syntax. Corrected and extended Result type. Added Notes formalpara. Added Warning about possible high memory usage. 207
Document History Internal functions :: UPPER(): Added <strong>2.1</strong> to “Changed in”. Edited Description (BLOB support). Added BLOB as result type and corrected VAR(CHAR) -> (VAR)CHAR. External functions :: addDay, addHour, addMilliSecond, addMinute, addMonth, addSecond, addYear: Added “Better alternative: Internal function DATEADD” formalpara. External functions :: addWeek: Added formalpara “The DATEADD alternative”. External functions :: getExactTimestamp: Edited “Better alternative” and Description. External functions :: log: Changed log -> log(x,y) in Description. External functions :: rand: Removed “the new function” from Description. External functions :: string2blob: Added “Better alternative” formalpara. Notes :: Understanding the WITH LOCK clause :: Syntax and behaviour: In table, aligned 1st column left, all rows top, and added periods to sentences in first two rows. License Notice: Added Frank Ingermann and Vlad Khorsun as contributors. (C) end year now 2010. 208
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Firebird 2.1 Language Reference Upd
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Table of Contents 1. Introduction .
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Firebird 2.1 Language Ref. Update F
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Firebird 2.1 Language Ref. Update A
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Firebird 2.1 Language Ref. Update s
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Chapter 1 Introduction Subject matt
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Chapter 2 Reserved words and keywor
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LOCK LOG LOG10 LPAD MATCHED MATCHIN
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Chapter 3 Available in: DSQL, PSQL
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Example: select name, age, case upp
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Data types and subtypes • Partial
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Added in: 1.0, 1.5, 1.5.1, 2.0, 2.1
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Chapter 5 DDL statements The statem
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With a special attribute (case-sens
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DIFFERENCE FILE parameter Added in:
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CREATE DOMAIN Available in: DSQL, E
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Example: DDL statements create exce
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Syntax: Example: ALTER EXTERNAL FUN
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DDL statements -- the following que
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DDL statements PROCEDURE A stored p
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DDL statements Description: Firebir
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DDL statements NOT NULL in variable
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CREATE GENERATOR Available in: DSQL
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Better alternative: DROP SEQUENCE D
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) DDL statements lastname varchar(2
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USING INDEX subclause Available in:
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ALTER COLUMN: SET DEFAULT Available
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UNIQUE constraints now allow NULLs
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Example: DDL statements create trig
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Multi-action triggers Added in: 1.5
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NOT NULL in variable declarations C
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DDL statements Restriction on recre
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DDL statements got a chance to put
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ORDER BY Available in: DSQL, PSQL A
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DML statements ROWS can also be use
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DML statements COLLATE in variable
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The same call in ESQL (with obligat
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DML statements Description: A SELEC
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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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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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• 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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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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Internal functions Description: Cre
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Internal functions reverse ('Was it
Page 168 and 169: Added in: 2.1 Internal functions De
Page 170 and 171: Syntax: SINH (number) Important Int
Page 172 and 173: Available in: DSQL, PSQL Added in:
Page 174 and 175: Notes: Internal functions • If th
Page 176 and 177: Description: Returns the arc cosine
Page 178 and 179: Declaration: External functions (UD
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Page 182 and 183: Better alternative: Internal functi
Page 184 and 185: External functions (UDFs) Descripti
Page 186 and 187: Syntax: cot (angle) Declaration: Ex
Page 188 and 189: Declaration: External functions (UD
Page 190 and 191: Library: ib_udf Added in: IB Change
Page 192 and 193: Changed in: 1.5, 1.5.2, 2.0 Better
Page 194 and 195: External functions (UDFs) DECLARE E
Page 196 and 197: See sright. Library: fbudf Added in
Page 198 and 199: Notes: External functions (UDFs) Fo
Page 200 and 201: Syntax: sign (number) Declaration:
Page 202 and 203: Library: fbudf Added in: 1.0 (Win),
Page 204 and 205: Notes: External functions (UDFs) th
Page 206 and 207: Better alternative: Internal functi
Page 208 and 209: Appendix A: Notes Character set NON
Page 210 and 211: Table A.1. How TPB settings affect
Page 212 and 213: Notes A note on CSTRING parameters
Page 214 and 215: Notes Maximum number of indices in
Page 216 and 217: Document History DDL statements ::
Page 220: Appendix C: License notice The cont
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Firebird 2.1 Language Reference Update

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