[an error occurred while processing this directive]
PATH
Documentation > WebObjects 4.5 >
OracleEOAdaptor Reference
Inherits
from: EOSQLExpression : NSObject
Declared in: OracleEOAdaptor/OracleSQLExpression.h
Class Description
OracleSQLExpression defines how to build SQL statements for
OracleChannels.
Class Methods
+ (int)serverTypeIdForName:(NSString
*)typeName
Returns the Oracle type code (such as OraVARCHAR2
or OraNumber) for typeName (such
as "VARCHAR2" or "NUMBER").
+ (void)setUseNoWaitLocks:(BOOL)flag
Sets according to flag whether
the lock clause of the OracleSQLExpression is @"FOR UPDATE"
(block until the row is available) or @"FOR UPDATE NOWAIT" (return
an error immediately if an attempt to lock a row would block). By
default OracleSQLExpression uses the clause @"FOR UPDATE"-that
is, by default it does not use NOWAIT locks. This behavior is also
controllable through the EOOracleUseNoWaitLocks user
default.
+ (void)setUseQuotedExternalNames:(BOOL)flag
Sets according to flag whether
the OracleSQLExpression expects external (database) names to be enclosed
in quotation marks. This is useful if the database has table or
column names that are either reserved words or that are not all
uppercase. The default is NO. This behavior can also be controlled
through the EOOracleUseQuotedExternalNames user
default.
+ (BOOL)useNoWaitLocks
Returns YES to indicate that the OracleSQLExpression
uses NOWAIT locks, NO otherwise. The default is NO.
+ (BOOL)useQuotedExternalNames
Returns YES to indicate that the OracleSQLExpression
uses quoted external (database) names, NO otherwise.
Instance Methods
- (NSString *)lockClause
Overrides the EOSQLExpression method lockClause to return
the SQL string used in a SELECT statement to lock selected rows.
Queries the user default EOOracleUseNoWaitLocks. If this default
is not set or if it is set to NO, this method returns the string @"FOR
UPDATE". If the default is set to YES, this method returns @"FOR
UPDATE NOWAIT".