Appendix D – Incompatibilities with SQL-92

Note

You are reading a digital copy of SQL-99 Complete, Really, a book that documents the SQL-99 standard.

For more information specific to CrateDB, check out the CrateDB Reference.

SQL3 is compatible with the former version of the Standard (SQL-92) except in the following cases.

  • In SQL-92, a <parameter declaration list> had a deprecated alternative <parameter declaration>... (i.e.: a parameter list not surrounded by parentheses and with the component parameter declarations not separated by commas). SQL3 does not contain this option.

  • In SQL-92, if one or more rows deleted or updated through some Cursor are later updated or deleted through some other Cursor by a <delete statement: searched>, by an <update statement: searched> or by some <update rule> or <delete rule> of some <referential constraint definition>, no exception condition is raised and no completion condition (other than successful completion) is raised. In SQL3, a completion condition is raised: warning-cursor operation conflict.

  • In SQL-92, there were two <status parameter>s provided: the deprecated SQLCODE and SQLSTATE. SQL3 does not support the SQLCODE <status parameter> and SQLCODE is no longer a reserved <keyword>.

  • SQL-92 allowed you to omit the semicolon at the end of <module contents>; listing this as a deprecated feature. In SQL3, the semicolon at the end of <module contents> is mandatory.

  • In SQL-92, it was possible for applications to define new Character sets, Collations and Translations. In SQL3, those capabilities are limited to defining new Character sets, Collations and Translations that are identical to existing Character sets, Collations and Translations, respectively, except for their names and other minor details.

  • In SQL-92, it was possible for applications to specify the Character set associated with an <identifier> using: _<Character set specification>. SQL3 no longer supports that capability.

  • In SQL-92, it was possible to sort a Cursor by a Column’s ordinal position in the Cursor. SQL3 no longer supports that capability.

  • SQL3 contains more reserved <keyword>s than SQL-92. The new reserved <keyword>s are:

ABS
ACTION
AFTER
AGGREGATE
ALIAS
ARRAY
BEFORE
BINARY
BLOB
BOOLEAN
BREADTH
CALL
CARDINALITY
CLOB
COMPLETION
CONCATENATE
CUBE
CURRENT_PATH
CYCLE
DATA
DEPTH
DEREF
DESTROY
DICTIONARY
EACH
EQUALS
EVERY
FACTOR
FREE
GENERAL
GROUPING
HOLD
HOST
IGNORE
INITIALIZE
ITERATE
LESS
LARGE
LIMIT
LOCATOR
MOD
MODIFIES
MODIFY
NCLOB
NEW
NO
NONE
OBJECT
OFF
OLD
OPERATION
OPERATOR
ORDINALITY
OVERLAY
PARAMETER
PARAMETERS
PATH
PREORDER
READS
RECURSIVE
REF
REFERENCING
REPLACE
RESULT
RETURN
RETURNS
ROLLUP
ROLE
ROUTINE
ROW
SAVEPOINT
SEARCH
SENSITIVE
SEQUENCE
SESSION
SETS
SIMILAR
SPACE
SPECIFIC
SPECIFICTYPE
SQLEXCEPTION
SQLWARNING
START
STATE
STRUCTURE
SUBLIST
SYMBOL
TERM
TERMINATE
THE
TREAT
TRIGGER
TYPE
UNDER
VARIABLE
WITHOUT