Sets database options in an
SAP ASE-compatible manner.
Syntax
SET <option-name> option-value
option-value
ANSINULL [ ON | OFF ]
| ANSI_PERMISSIONS [ ON | OFF ]
| CLOSE_ON_ENDTRANS ON
| QUOTED_IDENTIFIER [ ON | OFF ]
| ROWCOUNT <integer>
| STRING_RTRUNCATION [ ON | OFF ]
| TRANSACTION ISOLATION LEVEL [ 0 | 1 | 2 | 3 ]
Parameters
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- ANSINULL the default behavior for comparing values to
NULL in SAP IQ and SAP ASE is different. Setting
ANSINULL to OFF provides Transact-SQL compatible comparisons with
NULL.
- ANSI_PERMISSIONS the default behavior in SAP IQ and SAP ASE regarding permissions required to carry out
a DELETE containing a column reference is different. Setting
ANSI_PERMISSIONS to OFF provides Transact-SQL-compatible permissions on
DELETE.
- CLOSE_ON_ENDTRANS when set to ON (the default and only allowable
value), cursors are closed at the end of a transaction. With the option set
ON, CLOSE_ON_ENDTRANS provides Transact-SQL-compatible
behavior.
- QUOTED_IDENTIFIER controls whether strings enclosed in double
quotes are interpreted as identifiers (ON) or as literal strings
(OFF).
- ROWCOUNT in the Transact-SQL, limits to the specified
integer the number of rows fetched for any cursor. This includes rows
fetched by repositioning the cursor. Any fetches beyond this maximum return
a warning. The setting is considered when returning the estimate of the
number of rows for a cursor on an OPEN
request.
Note
SAP IQ
supports the <@@rowcount> global
variable. SELECT, INSERT, DELETE, and UPDATE statements affect the value of the ROWCOUNT
clause. The ROWCOUNT clause has
no effect on cursor operation, the IF statement, or creating or dropping a table or
procedure.
In SAP IQ, if ROWCOUNT is greater than the number of
rows that dbisql can display,
dbisql may do extra fetches to
reposition the cursor. The number of rows actually displayed may be less
than the number requested. Also, if any rows are refetched due to
truncation warnings, the count might be inaccurate.
A value of zero resets the option to get all
rows.
- STRING_RTRUNCATION the default behavior in SAP IQ and SAP ASE when nonspace characters are truncated on
assigning SQL string data is different. Setting STRING_RTRUNCATION to ON
provides Transact-SQL-compatible string comparisons, including hexadecimal
string (binary data type) comparisons.
- TRANSACTION ISOLATION LEVEL sets the locking isolation level for the
current
connection
For SAP ASE, only 1 and 3 are
valid options. For SAP IQ, only
3 is a valid option.
- SET PREFETCH is allowed by SAP IQ for compatibility, but has no
effect.
Usage
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Database options in SAP IQ are set using the SET
OPTION statement. However, SAP IQ also provides support for the SAP ASE
SET statement for a set of options particularly
useful for compatibility.
Standards
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- SQL—Transact-SQL extension to ISO/ANSI SQL grammar.
- SAP Database products—SAP IQ supports a subset of the
SAP ASE database
options.