Firebird 2.1 Language Reference Update

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Document History DDL statements :: PROCEDURE :: CREATE PROCEDURE :: Domains instead of datatypes: Renamed to Domains supported in parameter and variable declarations. Added Warning about changing domain definitions. DDL statements :: PROCEDURE :: CREATE PROCEDURE: Added subsection NOT NULL in variable and parameter declarations. DDL statements :: PROCEDURE :: ALTER PROCEDURE :: Domains instead of datatypes: Renamed to Domains supported in parameter and variable declarations. DDL statements :: PROCEDURE :: ALTER PROCEDURE: Added subsection NOT NULL in variable and parameter declarations. DDL statements :: TABLE :: CREATE TABLE :: GENERATED ALWAYS AS: Added Note about it not being supported in index definitions. DDL statements :: TABLE :: CREATE TABLE: Added subsection FOR- EIGN KEY without target column references PK. DDL statements :: TABLE :: ALTER TABLE: Added subsection FOREIGN KEY without target column references PK. DDL statements :: TABLE :: ALTER TABLE: Added subsection GENER- ATED ALWAYS AS. DDL statements :: TRIGGER :: CREATE TRIGGER: Added subsection NOT NULL in variable declarations. DDL statements :: TRIGGER :: ALTER TRIGGER: Added subsection NOT NULL in variable declarations. DDL statements :: VIEW :: CREATE VIEW :: Full SELECT syntax supported: Mentioned that in Fb 2.5 the column list becomes optional also for union views. DDL statements :: VIEW :: CREATE VIEW :: PLAN subclause disallowed in 1.5: Changed title to PLAN subclause disallowed in 1.5, reallowed in 2.0. DML statements :: DELETE: Corrected formal syntax (columns -> values). Corrected syntax note about WHERE CURRENT OF. DML statements :: DELETE: Added subsection COLLATE subclause for text BLOB columns. DML statements :: DELETE: Added subsection Relation alias makes real name unavailable. DML statements :: DELETE :: RETURNING: Improved Description. DML statements :: EXECUTE BLOCK: Added NOT NULL support for in/ out/local PSQL vars (added “Changed in” formalpara, updated syntax block, added subsection). DML statements :: INSERT: Corrected formal syntax (column_list -> value_list). DML statements :: INSERT :: RETURNING: Improved Description. DML statements :: MERGE: Mentioned CTE in description and created links. DML statements :: SELECT :: Common Table Expressions: Edited Description, Syntax and Notes. DML statements :: SELECT :: Table alias must be used if present: Renamed to Relation alias makes real name unavailable and moved to before ROWS subsection. Also changed Description and paragraph before last example. DML statements :: UPDATE: Corrected formal syntax (columns -> values). Corrected syntax note about WHERE CURRENT OF. 205
Document History DML statements :: UPDATE: Added subsection COLLATE subclause for text BLOB columns. DML statements :: UPDATE: Added subsection Relation alias makes real name unavailable. DML statements :: UPDATE :: RETURNING: Improved Description. DML statements :: UPDATE OR INSERT: Corrected formal syntax (columns -> values). Edited first two subitems of second Note. PSQL statements :: DECLARE: Added NOT NULL to Syntax. Added Syntax note about including a character set. PSQL statements :: DECLARE :: DECLARE ... CURSOR: Edited first Note and placed it last. Added a subsequent note about the effects of variable changes during loop execution. PSQL statements :: DECLARE :: DECLARE with DOMAIN instead of datatype: Added Warning about changing domain definitions. PSQL statements :: DECLARE: Added subsection NOT NULL in variable declaration. PSQL statements :: FOR SELECT ... INTO ... DO: Edited Syntax note and added a second note about the effects of variable changes during loop execution. Context variables :: CURRENT_CONNECTION: Improved Description. Context variables :: CURRENT_TIME: Edited description. Removed Note and added Notes formalpara. Context variables :: CURRENT_TIMESTAMP: Edited description. Removed Note and added Notes formalpara. Context variables :: CURRENT_TRANSACTION: Improved Description. Context variables :: 'NOW': Removed Note and added Notes formalpara. Operators and predicates :: || (string concatenator): New subsections Text BLOB concatenation and Result type VARCHAR or BLOB. Operators and predicates :: || (string concatenator) :: Overflow checking: Corrected “Changed in” and Description. Aggregate functions :: LIST(): Extended 1st and 2nd second listitems under Syntax. Inserted new listitem about BLOB support in 3rd position. Edited 5th (previously 4th) listitem. Added warning on truncation bug. Aggregate functions :: MAX(): New section. Aggregate functions :: MIN(): New section. Internal functions: Replaced all occurrences of “obfuscate” in the function sections with “override”. Internal functions :: ASCII_VAL(): Edited Syntax. Added listitem about NULL. Altered last listitem. Internal functions :: ATAN2(): Replaced argument names num1 and num2 with y and x, respectively. Changed wording of 3rd Syntax note. Added two Notes. Internal functions :: BIT_LENGTH(): Added formalparas “Changed in” and “BLOB support”. Edited Note after Syntax block and placed it after Description. Internal functions :: CAST(): Edited Changed in, Description and Syntax. Worked BLOB into table. Added paragraphs and examples re. casting to a domain. Added formalpara “Casting BLOBs”. 206
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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
Page 166 and 167: 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
Page 180 and 181: Library: ib_udf Changed in: 1.0, 2.
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 218 and 219: Document History Internal functions
Page 220: Appendix C: License notice The cont
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Firebird 2.1 Language Reference Update

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