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Parameterized SQL statement: Difference between revisions
Add NetRexx implementation
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SQLUpdate[conn,"players",{"name","score","active"},{"Smith, Steve", 42,"TRUE"},SQLColumn["jerseyNum"] = 99];
CloseSQLConnection[conn];</lang>
=={{header|NetRexx}}==
Using an [http://db.apache.org/derby/ Apache Derby] embedded database:
<lang NetRexx>/* NetRexx */
options replace format comments java crossref symbols nobinary
import java.sql.
-- =============================================================================
class RParameterizedSQLSimple public
properties indirect
connexion = Connection
properties inheritable constant
DRIVER = "org.apache.derby.jdbc.EmbeddedDriver"
DBURL = "jdbc:derby:"
DBNAME = "/workspace/DB.DerbySamples/DB/TEAMS01"
DBMODE_CREATE = ";create=true"
DBMODE_NOCREATE = ";create=false"
DBMODE_SHUTDOWN = ";shutdown=true"
-- =============================================================================
method RParameterizedSQLSimple()
setConnexion(null)
return
-- =============================================================================
method createConnexion() inheritable returns Connection signals ClassNotFoundException, InstantiationException, IllegalAccessException
if getConnexion() = null then do
props = Properties()
props.put("user", "user1")
props.put("password", "user1")
xURL = String DBURL || DBNAME || DBMODE_CREATE
loadDriver(DRIVER)
setConnexion(DriverManager.getConnection(xURL, props))
end
return getConnexion()
-- =============================================================================
method shutdownConnexion() inheritable returns boolean signals SQLException
dbState = boolean
xURL = String DBURL || DBNAME || DBMODE_SHUTDOWN
do
DriverManager.getConnection(xURL)
dbState = isTrue
catch se = SQLException
if (se.getErrorCode() = 50000) & ("XJ015".equals(se.getSQLState())) then do
say "Derby shut down normally"
dbState = isTrue
end
else if (se.getErrorCode() = 45000) & ("08006".equals(se.getSQLState())) then do
say "Derby database shut down normally"
dbState = isTrue
end
else do
say "Derby did not shut down normally"
dbState = isFalse
signal se
end
end
return dbState
-- =============================================================================
method loadDriver(xdriver = String) inheritable static signals ClassNotFoundException, InstantiationException, IllegalAccessException
do
Class.forName(xdriver).newInstance()
say "Loaded the appropriate driver"
catch cnfe = ClassNotFoundException
say "Unable to load the JDBC driver" xdriver
say "Please check your CLASSPATH."
signal cnfe
catch ie = InstantiationException
say "Unable to instantiate the JDBC driver" xdriver
signal ie
catch iae = IllegalAccessException
say "Not allowed to access the JDBC driver" xdriver
signal iae
end
return
-- =============================================================================
method updatePlayer(jerseyNum = int, name = String, score = int, active = boolean) binary inheritable returns int signals SQLException
updateSQL = "" -
|| "UPDATE TEAM.PLAYERS" -
|| " SET NAME = ?, SCORE = ?, ACTIVE = ?" -
|| " WHERE JERSEYNUM = ?"
rowCt = int
ix = int 0
ps = getConnexion().prepareStatement(updateSQL)
ix = ix + 1; ps.setString(ix, name)
ix = ix + 1; ps.setInt(ix, score)
ix = ix + 1; ps.setBoolean(ix, active)
ix = ix + 1; ps.setInt(ix, jerseyNum)
rowCt = ps.executeUpdate()
return rowCt
-- =============================================================================
method main(args = String[]) public static
do
tda = RParameterizedSQLSimple()
tda.createConnexion()
if tda.getConnexion() \= null then do
updated = tda.updatePlayer(99, "Smith, Steve", 42, isTrue)
if updated > 0 then say "Update successful"
else say "Update failed"
finally
tda.shutdownConnexion()
end
catch ex = Exception
ex.printStackTrace
end
return
-- =============================================================================
method isTrue() public static returns boolean
return 1 == 1
-- =============================================================================
method isFalse() public static returns boolean
return \isTrue
</lang>
=={{header|Objeck}}==
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