SQLROLLBACK()

SQLROLLBACK()

Class

SQL Applications

Purpose

Rollback a transaction

Syntax

SQLROLLBACK(<nStatementHandle>)

See Also

CREATE CONNECTION, SQLCANCEL(), SQLCOLUMNS(), SQLCOMMIT(), SQLCONNECT(), SQLDISCONNECT(), SQLEXEC(), SQLGETPROP() SQLMORERESULTS(), SQLPREPARE(), SQLSETPROP(), SQLSTRINGCONNECT(), SQLTABLES()

Description

The SQLROLLBACK() function is used to roll back a transaction. The SQLROLLBACK() function is only required when Manual Transactions are in effect. The Transactions setting, set using SQLSETPROP(), can be either Automatic (1) or Manual (2). Manual Transactions can be can be committed using the SQLCOMMIT() function.

The SQLROLLBACK() function operates on the data source specified by <nStatementHandle>.

Keywords	Description
nStatementHandle	The workarea in which the gateway data source is open

Return values:

Return Value	Description
1	SQL statement was rolled back successfully
–1	Error occurred

Example

nStatHand=SQLSTRINGCONNECT("rec@rec1:user1/pass1/usr/recital/uas/data/southwind.tcpip",.T.)
if nStatHand < 1
messagebox("Cannot make connection", 16, "SQL Connect Error")
else
messagebox("Connection made", 48, "SQL Connect Message")
nSetEnd = SQLSETPROP(nStatHand,"Transactions",2)
if nSetEnd = 1
dialog box [Manual Transactions enabled]
else
dialog message [Unable to enable Manual Transactions. Continue?]
if lastkey() <> 89
SQLDISCONNECT(nStatHand)
return
endif
endif
nRET=SQLEXEC(nStatHand,"INSERT INTO example (ACCOUNT_NO, TITLE, LAST_NAME, FIRST_NAME, INITIAL, STREET, CITY, STATE, ZIP, LIMIT, START_DATE) VALUES ('00200','Mr','Doe','John','L','1 High Street','Beverly','MA','01916', 12000, {05/12/2003})")
if SQLGETPROP(nStatHand, "Transactions") = 2
dialog message [Commit Insert?]
if lastkey() = 89
dialog box "SQLCOMMIT() returned " + etos(SQLCOMMIT(nStatHand))
else
dialog box "SQLROLLBACK() returned " + etos(SQLROLLBACK(nStatHand))
endif
endif
nSetEnd = SQLSETPROP(nStatHand, "Transactions",1)
if nSetEnd = 1
dialog box [Automatic Transactions enabled]
else
dialog message [Unable to enable Automatic Transactions.]
endif
endif
SQLDISCONNECT(nStatHand)

Products

Recital Database Server, Recital Mirage Server, Recital Terminal Developer