This section describes how to install the Natural SQL Gateway (in the remainder of this section also referred to as NSB) in the various environments supported.
The installation procedures contain a number of options that depend on the TP monitor being used as well as on other site requirements.
This section covers the following topics:
This section covers the following topics:
The installation of Software AG products is performed by installation jobs. These jobs are either created manually or generated by System Maintenance Aid (SMA).
For each step of the installation procedure described later in the
section Installing Natural SQL Gateway , the job number of a job performing the
respective task is indicated. This job number refers to an installation job
generated by SMA. If you are not using SMA, an example job of the same number
is provided in the job library on the NSB installation tape; you must adapt
this example job to your requirements. Note that the job numbers on the tape
are preceded by a product code (for example, NSBI070).
For information on the use of Software AG's System Maintenance Aid for the installation process, refer to the System Maintenance Aid documentation.
Base Natural must be installed first; you cannot install Natural and Natural SQL Gateway at the same time.
Software AG Editor must be installed (see Installing the Software AG Editor in the Natural Installation documentation).
Natural for DB2 (product code NDB) must be installed included in the Natural SQL Gateway delivery.
ConnecX SQL Engine (CXX) must be installed included in the Natural SQL Gateway delivery.
For information, refer to the installation documentation of ConnecX SQL Engine.
Note:
Ensure that you have selected the Adabas Precompiler component
during installation.
A Natural SQL Adapter for each SQL database system that you want to access through Natural SQL Gateway is required.
Product/version dependencies are specified under Natural and Other Software AG Products and Operating/Teleprocessing Systems Required in the current Natural Release Notes.
In order to perform CREATE TABLE statements so that the
table name qualifier on the target DB2 system is the same as the table name
qualifier in the CDD and as specified in the CREATE TABLE
statement the registry entry USECONNXSCHEMAFORNATIVE of ConnecX
SQL Engine has to be set to 1.
On Windows systems, this could be done by the Configuration Manager of ConnecX SQL Engine.
On UNIX systems, this has to be accomplished by the following command
SQLREGISTRY 5 CONNX.USECONNXSCHEMAFORNATIVE 0 1. The result of the
above command could be verified by the following command SQLREGISTRY
1.
The installation tape contains the datasets listed in the table below. The sequence of the datasets is shown in the Report of Tape Creation which accompanies the installation tape.
| Dataset Name | Contents |
|---|---|
NSBvrs.LOAD |
Load modules |
NSBvrs.JOBS |
Example installation jobs |
NSBvrs.OBJS |
Contains the object modules of the server. See Installing the Natural SQL Gateway Server under z/OS. |
The installation tape for NSB also contains the following NDB datasets:
| Dataset Name | Contents |
|---|---|
NDBvrs.SRCE |
Source modules |
NDBvrs.LOAD
|
Load modules |
NDBvrs.INPL
|
Utility programs in INPL
format
|
NDBvrs.ERRN |
Error messages |
The notation vrs in dataset
names represents the version number of the product.
If you have already installed the latest NDB version, you must not copy the NDB datasets from the tape again.
SMA を使用する場合は、『System Maintenance Aid』ドキュメントを参照してください（Natural ドキュメント CD の最新版に含まれています）。
SMA を使用しない場合は、次の指示に従ってください。
このセクションでは、次の方法について説明します。
データセット COPY.JOB をテープからディスクにコピーします。
ローカルの命名規則に一致するように、このデータセットを変更します。
このデータセットの JCL を使用して、すべてのデータセットをテープからディスクにコピーします。
複数の製品のデータセットがテープで配布されている場合は、配布されたすべての製品のデータセットをテープからディスクにアンロードするための JCL がデータセット COPY.JOB に含まれています。
その後で、各コンポーネントに対して個別のインストール手順を実行する必要があります。
データセット COPY.JOB（ラベル 2）には、他のすべての既存のデータセットをテープからディスクにアンロードするための JCL が含まれています。 COPY.JOB をアンロードするには、次のサンプル JCL を使用します。
//SAGTAPE JOB SAG,CLASS=1,MSGCLASS=X //* --------------------------------- //COPY EXEC PGM=IEBGENER //SYSUT1 DD DSN=COPY.JOB, // DISP=(OLD,PASS), // UNIT=(CASS,,DEFER), // VOL=(,RETAIN,SER=tape-volume), // LABEL=(2,SL) //SYSUT2 DD DSN=hilev.COPY.JOB, // DISP=(NEW,CATLG,DELETE), // UNIT=3390,VOL=SER=volume, // SPACE=(TRK,(1,1),RLSE), // DCB=*.SYSUT1 //SYSPRINT DD SYSOUT=* //SYSIN DD DUMMY //
プレースホルダの意味は次のとおりです。
hilev は有効なハイレベル修飾子です。
tape-volume はテープボリューム名です（T12345 など）。
volume はディスクボリューム名です。
ローカルの命名規則に一致するようにディスクの COPY.JOB を変更し、ディスクのスペースパラメータを次のように設定してからこのジョブを送信します。
HILEV に有効なハイレベル修飾子を設定します。
LOCATION にストレージの場所を設定します。
EXPDT に有効な失効日を設定します。
COPY.JOB を送信して、その他すべてのデータセットをテープからディスクにアンロードします。
This section describes how to install Natural SQL Gateway in various environments and covers the the following topics:
The following steps describe the procedure for installing the components of Natural SQL Gateway that are common to all environments:
Job I055, Steps 1640 or 1660 or 1675
The NSB parameter module NDBPARM contains the macro
NDBPRM with
parameters specific to the Natural SQL Gateway and the macro
NDBID to specify
the database type of an SQL DBID.
You can generally use the default values for all parameters. Modify only the values of the parameters whose default values do not suit your requirements.
The individual parameters are described in the section Parameter Module NDBPARM.
When Natural SQL Gateway will be used within a TP environment (CICS or Com-plete)
Specify via NSBAHOST and NSBAPORT the
TCP/IP address and port number of the Natural SQL Gateway server to be deployed
for passing the SQL requests and results to and from the JDBC server.
When the file server is not to be used:
Execute the Steps 1640 and 1650; the resulting parameter module is
again called NDBPARM.
When the file server is to be used:
Execute the Steps 1660 and 1670; the resulting additional parameter
module is called NDBPARMF.
When the file server uses the Software AG Editor buffer pool as storage medium:
Execute the Steps 1675 and 1676, the resulting additional parameter
module is called NDBPARME.
Job I055, Step 1680
Link-edit the environment-independent NSB nucleus
NATGWDB2. Verify that the INCLUDE cards refer to the
corresponding DD names for the load libraries.
Job I060, Step 0010 – 0015
Adapt your Natural parameter module NATPARM by adding
parameters specific to Natural for SQL Gateway (see Natural Parameter
Modification for NSB) and reassemble NATPARM.
Job I060, Step 0020 - 01610
Natural SQL Gateway basically consists of:
An environment-independent nucleus, which can be shared by multiple environments.
Environment-dependent components, which must be linked to the appropriate Natural environment-dependent interface.
Job I060, Step 0105
Modify the JCL used to link your Natural shared nucleus by adding the
following INCLUDE card:
INCLUDE SMALIB(NATGWDB2)
|
Environment-independent NSB nucleus from Step 2 |
Job I060, Step 0020 and 1610
Modify the JCL used to link your Natural environment-dependent nucleus
by adding the following INCLUDE cards and the corresponding DD
statements:
INCLUDE SMALIB(NDBPARM) |
NDB parameter module created in Step 1 |
INCLUDE SMALIB(NSBCNXTB) |
ConnecX SQL Engine (CXX) interface entry point table |
INCLUDE RCIOBJ(xxxxxxx) |
Environment-dependent Interface (see below) |
RCIOBJ denotes the RCI.OBJ library from the
installation of ConnecX SQL Engine.
| Interface | Library | Description | Environment |
|---|---|---|---|
| API3GL | RCIOBJ | ConnecX Client | TSO and batch |
| CXXCLNT | RCIOBJ | Natural SQL Gateway Client | CICS and Com-plete. |
If you want to use the Natural File Server, include
SMALIB(NDBPARMF) or SMALIB(NDBPARME) instead of
SMALIB(NDBPARM); see also Step 1 above.
Note:
If you want to use NSB in various environments (that is, with
different TP monitors), you must repeat this step for each of these
environments.
Instead of link-editing your Natural nucleus in the way described above, you have the following alternatives:
If you do not use a Natural shared nucleus, all modules must be included in the link-edit of the Natural nucleus.
Remove NATGWDB2 from the link-edit of the Natural
shared nucleus and run it as a separate module with the mandatory entry name
NATGWDB2. You can modify the name of the module created in Step 2.
However, if you use a name different from NATGWDB2, this name must
be specified as an alias name in an NTALIAS macro entry
of the Natural parameter module. This way of link-editing only applies if the
Natural Resolve CSTATIC Addresses feature (RCA) is used.
Include all modules in the link-edit job of a separate Natural
parameter module with the mandatory entry name CMPRMTB. The name
of the resulting module is arbitrary. This way of link-editing only applies if
an alternative parameter module (profile parameter
PARM) is
used. If link-editing is done in this way, you can install NSB without having
to modify your Natural nucleus or driver.
This section describes how to install Natural SQL Gateway in a CICS environment:
This section covers the following topics:
Job I008, Step 1610
Specify the size and the name of the VSAM RRDS that is to be used as the file server (see also Installing the File Server in Natural File Server for DB2).
Job I075, Step 1610
Specify the five input parameters required to format the file server dataset (see also Natural File Server for DB2).
Shown below are sample additional CICS table entries needed for the file server and for the DB2 components of Natural:
FCT entry:
CMFSERV DFHFCT TYPE=DATASET, X
ACCMETH=VSAM , X
BUFND=5, X
BUFNI=4, X
DATASET=CMFSERV, X
DISP=SHR, X
DSNAME=SAGLIB.NCIDB2.SERVER, X
FILSTAT=(ENABLED,CLOSED), X
JID=NO, X
LOG=NO, X
LSRPOOL=NONE, 1-8 ONLY FOR XA; NONE X
RECFORM=(FIXED,BLOCKED), X
RSL=PUBLIC, X
SERVREQ=(ADD,UPDATE,DELETE,BROWSE), X
STRNO=4 |
Restarting CICS is required, because of the additional FCT entry above.
Specify the five input parameters required to format the file server dataset (see also Installing the File Server in Natural File Server for DB2).
Modify the NDBPARM module by specification of the NSBAHOST parameter to denote the TCP/IP address and the NSBAPORT parmeter to denote the port number of the Natural SQL Gateway server.
Invoke Natural with a appropriate DB2SIZE.
Ensure that SQL tables can be accessed. Before the first SQL call you must connect to the ConnecX SQL Engine JDBC server. For this, use a PROCESS SQL statement to specify the desired hostname, port number and CDD file, plus user ID and password.
This section describes how to install Natural SQL Gateway in a Com-plete environment:
This section covers the following topics:
Modify the NDBPARM module by specification of the
NSBAHOST parameter to denote the TCP/IP address and the
NSBAPORT parmeter to denote the port number of the
Natural SQL Gateway server.
Invoke Natural with a appropriate DB2SIZE.
Ensure that SQL tables can be accessed. Before the first SQL call you must connect to the ConnecX SQL Engine JDBC server. For this, use a PROCESS SQL statement to specify the desired hostname, port number and CDD file, plus user ID and password.
This section describes how to install Natural SQL Gateway in a TSO environment:
This section covers the following topics:
If you want to use the Natural File Server (VSAM), perform the following additional steps:
Set the NDBFSRV
parameter in the NATTSO
macro to YES and reassemble and relink your Natural TSO interface
NATTSO.
Job I008, Step 1620
Specify the size and the name of the VSAM RRDS that is to be used as the file server (see also Installing the File Server in Natural File Server).
Job I075, Step 1620
Specify the five input parameters required to format the file server dataset (see also Installing the File Server in Natural File Server).
To test the TSO installation of Natural SQL Gateway, perform the following steps:
Job I070, Step 2400
Change the library and program names in the CLIST NSBTSO
to meet site requirements. If you do not use the file server, remove the
ALLOC and FREE statements for CMFSERV.
Invoke Natural by executing the CLIST created in the previous step.
Ensure that SQL tables can be accessed. Before the first SQL call you must
connect to the ConnecX SQL Engine JDBC server. For this, use a
PROCESS SQL
statement to specify the desired hostname, port number and CDD file, plus user
ID and password.
This section provides example batch jobs and online methods for verifying the installation of Natural SQL Gateway:
This section covers the following topics:
NSBBATCA contains sample JCL to test Natural SQL Gateway
in batch mode. Modify the sample JCL to meet site requirements.
Before the first SQL call you must call NSBDCON to
explicitly connect to the ConnecX SQL Engine JDBC server. NSBDCON
can be edited to specify the appropriate host name, port number and CDD
registry name.
The online verification can only be done in a TSO environment, because Natural SQL Gateway is currently only available in a TSO environment.
The following table contains all Natural SQL Gateway (NSB) sample programs. They are all provided during the Natural SQL Gateway installation.
| Program Name | Purpose |
|---|---|
NSBDCON
|
Connect to ConnecX SQL Engine JDBC server. |
NSBDCREA
|
Create table NSB.DEMO.
|
NSBDISC
|
Disconnect from ConnecX SQL Engine JDBC server. |
NSBDROP
|
Drop table NSB.DEMO.
|
NSBDFIND
|
Read NSB.DEMO by
FIND statement.
|
NSBDINS
|
Load NSB.DEMO by
INSERT statement.
|
NSBDPDEL
|
Delete from NSB.DEMO by positioned
DELETE.
|
NSBDPUPD
|
Update NSB.DEMO by positioned
UPDATE.
|
NSBDSDEL
|
Delete from NSB.DEMO by searched
UPDATE.
|
NSBDSEL
|
Read NSB.DEMO by
SELECT statement.
|
NSBDSET
|
Show SET SCHEMA and SET CATALOG statements. |
NSBDSTOR
|
Load NSB.DEMO by
STORE statement.
|
NSBDSUPD
|
Update NSB.DEMO by searched
UPDATE.
|
All programs use DDM NSB-DEMO, which uses the LFILE
102. Therefore the NATPARM has to map the LFILE
102 to a DBID which is mapped to the database type CNX by a
NDBID definition in the NDBPARM module.
Before the demo programs can be executed the user has to connect to a
ConnecX SQL Engine JDBC server. This could be done by a modified copy of the
NSBDCON program.
The results of demo programs differ depending on the sequence of their execution.
If you receive the message NAT3700, enter the Natural system command
SQLERR to display the corresponding SQL return code.
You can find the description of the SQLERR command
under the heading Natural
System Commands for DB2 in the section Natural
Tools for DB2 in the Natural for DB2
documentation.
This section covers the following topics:
To set the Natural profile parameters
Add the following Natural profile parameter to your
NATPARM module:
DB2SIZE=nn
The DB2SIZE parameter can also be specified
dynamically. It indicates the size of the DB2 buffer area, which must be set to
at least 6 KB.
The setting of DB2SIZE also depends on whether
you use the file server or not. If the file server is not used, the setting can
be calculated according to the following formula:
((1064 + n1 * 40 + n2 * 120) + 1023) / 1024 KB
If the file server is used, the setting can be calculated according to the following formula:
((1060 + n1 * 40 + n2 * 160 + n3 * 8) 1023) / 1024 KB
The variables n1, n2 and n3 correspond to:
| n1 | the number of statements for dynamic access as specified as the second parameter in Job I055, Step 1600; |
| n2 | the maximum number of nested database loops as specified with
the MAXLOOP parameter in NDBPARM;
|
| n3 | the maximum number of file server blocks to be allocated per
user specified as the fifth parameter in Job I075, Step 1620 or the
EBPMAX parameter of NDBPARM, if you decided
to use the Software AG Editor buffer pool as file server.
|
Important:
Ensure that you have also added the Natural parameters
required for the Software AG Editor; see the relevant installation description
in the section Installing the Software AG Editor, in the Natural Installation
documentation.
As DB2SIZE applies to Natural for DB2 and
Natural SQL Gateway, it must be set to the maximum value if you run more than
one of these environments.
Add an NTDB entry with database-type SQL
specifying the list of logical database numbers that relate to SQL tables. All
Natural DDMs that refer to an SQL table must be cataloged with a DBID from this
list. DBIDs can be any number from 1 to 254; a maximum of 254 entries can be
specified. For most user environments, one entry is sufficient.
Important:
Ensure that all SQL DDMs used when cataloging a given program
have a valid SQL DBID. Also ensure that the DBIDs selected in the
NTDB macro for SQL do not conflict with DBIDs selected
for other database systems
At execution time of a program catalogued with a DBID of
database-type SQL, the SQL database-type specified for that DBID in the NDB
parameter module via NDBID macro determines which kind
of database interface is used to access the SQL database. If the associated
type is CNX, the Natural SQL Gateway will be used.
NTDB SQL,(200,249)
Add an LFILE entry for LFILE 102 specifying
a logical database number (DBID), that relates to database type CNX. This is
necessary for usage of ISQL or calls to NDBISQL using Natural SQL
Gateway.
NTLFILE 102,249,1 |
SQL system file for CNX |
During execution of an SQL statement, storage is allocated dynamically to build the SQLDA for passing the host variables to the CXX interface stub.
For performance reasons, it is first attempted to meet the storage
requirements by free space in the Natural for DB2 buffer
(DB2SIZE). If there is not enough space available in
this buffer, the TP monitor or operating system is invoked.
To take advantage of this performance enhancement, you must specify
your DB2SIZE larger than calculated according to the
formula; see Natural Profile
Parameter Settings.
Depending on the SQL execution mode and on the usage of the Natural file server, the additional storage requirements (in bytes) can be calculated as follows:
With sending fields:
80 + n * 56
With sending fields including LOB columns:
80 + 2 * n * 56
where n is the number of sending fields in an SQL statement. The storage is freed immediately after the execution of the SQL statement.
With receiving fields (that is, with variables of the
INTO list of a SELECT statement):
80 + n * 56 + 24 + n * 2
With receiving fields including LOB columns:
80 + 2 * n * 56 + 24 + n * 2
where n is the number of receiving fields in an SQL statement.
The storage remains allocated until the loop is terminated.
When using the file server, additional storage is required for each database loop that contains positioned UPDATE and/or DELETE statements.
For each of such loops, a buffer is allocated to save the contents of
all receiving fields contained in the INTO list. Therefore, the
size of this buffer corresponds to the total length of all receiving fields:
20 + 4 + sum (length (vl), ..., length (vn))
where v1 ...
vn refers to the variables contained in the
INTO list.
The buffer remains allocated until the loop is terminated.
If you use the default value 10 for both variables
(n1 and n2), the
calculated DB2SIZE will be 2208 bytes. However, if you
specify a DB2SIZE of 20 KB instead, the available space
for dynamically allocated storage will be 18272 bytes, which means enough space
for up to either 325 sending fields or 313 receiving fields.
Since space for receiving fields remains allocated until a database loop is terminated, the number of fields that can be used inside such a loop is reduced accordingly: for example, if you retrieve 200 fields, you can update about 110 fields inside the loop.
When using VARCHAR fields (that is, fields with either an
accompanying L@ field in the Natural view or an explicit
LINDICATOR clause), additional storage is allocated dynamically if
the L@ or LINDICATOR field is not specified directly
in front of the corresponding base field. Therefore, always specify these
fields in front of their base fields.
The source module NDBPARM is used in several Natural add-on
products. It contains parameter macros specific to an SQL environment:
These macros are described below.
The default values of the parameters contained in this macro can be modified to meet site-specific requirements (see the corresponding step of the Installation Procedure). The values of the parameters cannot be dynamically overwritten.
Below is a description of all parameters contained in the
NDBPRM macro:
BTIGN |
CONVERS |
CONVRS2 |
DDFSERV |
DELIMID |
EBPFSRV |
EBPPRAL |
EBPSEC |
EBPMAX |
ETIGN |
FSERV |
MAXLOOP |
NNPSF |
NSBAHOST |
NSBAPORT |
PSCIGN |
REFRESH |
RETRYPO |
RWRDONL |
STATDYN
The following parameters in the NDBPRM parameter macro are
relevant to Natural SQL Gateway. All other parameters contained in the module
are ignored.
DDFSERV
| DELIMID
| EBPFSRV
| EBPPRAL
| EBPSEC
| EBPMAX |
FSERV |
MAXLOOP |
NNPSF |
NSBAHOST |
NSBAPORT |
PSCIGN |
RWRDONL
Note:
This parameter does not apply to Natural SQL Gateway and is
ignored. This parameter is relevant in CICS and IMS TM environments
only.
BTIGN ignores the error which results from a
BACKOUT TRANSACTION statement that
was issued too late for backing out the current transaction, because an
implicit Syncpoint has previously been issued by the TP monitor.
Possible Values:
| Value | Explanation |
|---|---|
ON |
The error after a late BACKOUT TRANSACTION is ignored. This is the default value. |
OFF |
The error after a late BACKOUT TRANSACTION is not ignored. |
This parameter is used to allow conversational mode in CICS environments where no Natural file server is used.
Possible Values:
| Value | Explanation |
|---|---|
ON |
Conversational mode is allowed. This is the default value. |
OFF |
Conversational mode is not allowed. |
If this parameter is set to OFF and no Natural file
server is used, you cannot continue database loops across terminal I/Os; if so,
the DB2 SQL codes -501, 504, 507, 514, or 518 may occur.
This parameter is used to allow conversational mode 2 in CICS environments.
Possible Values:
| Value | Explanation |
|---|---|
ON |
Conversational mode 2 is allowed. |
OFF |
Conversational mode 2 is not allowed. This is the default value. |
This parameter is used to control conversational mode 2 in CICS
environments. Conversational mode 2 means that update transactions are spawned
across terminal I/Os until either an explicit COMMIT or explicit
ROLLBACK has been issued (Caution: DB2 and CICS resources are kept
across terminal I/Os!). This means CONVRS2=ON has the same effect
as the Natural parameter PSEUDO=OFF, except that the
conversational mode is entered after an DB2 update statement
(UPDATE, DELETE, INSERT) and left again
after a COMMIT or ROLLBACK, while
PSEUDO=OFF causes conversational mode for the total Natural
session.
See also CALLNAT subprogram NDBCONV, which
allows setting or resetting conversational mode 2 dynamically.
This parameter specifies a DD name for the Natural file server module
other than CMFSERV.
Possible Values:
| Value | Explanation |
|---|---|
| DD-name | Any valid DD name. There is no default value. |
This parameter determines the escape character to be used for generating delimited SQL identifiers for the column names and table names in SQL statements. A delimited identifier is a sequence of one or more characters enclosed in escape characters. You must specify a delimited identifier if you use SQL-reserved words for column names and table names, as demonstrated in the Example of DELIMID below.
Possible Values:
| Value | Explanation |
|---|---|
" |
Double quotation mark |
' |
Single quotation mark |
| None | No value: Delimited identifiers are not enabled. This is the default value. |
To enable generation of delimited identifiers,
DELIMID must be set to double quotation mark (") or
single quotation mark (').
The escape character specified for DELIMID and
the SQL STRING DELIMITER are mutually exclusive. This
implies that the mark (double or single quotation) used to enclose alphanumeric
strings in SQL statements must be different from the value specified for
DELIMID. If you enable delimited identifiers, ensure
that the value specified for DELIMID also complies with
the SQL STRING DELIMITER value of your DB2 installation.
See also the RWRDONL parameter to
determine which delimited identifiers are generated in the SQL string.
Note:
For NSB users:
If generation of delimited identifiers is enabled, switch on the ConnecX CDD option Use Quoted Delimiter.
In the following example, a double quotation mark (") has been specified as the escape character for the delimited identifier:
Natural statement:
SELECT FUNCTION INTO #FUNCTION FROM XYZ-T1000
Generated SQL string:
SELECT "FUNCTION" FROM XYZ.T1000
This parameter is used to determine whether the Natural file server uses the Software AG Editor buffer pool as storage medium or not.
Possible Values:
| Value | Explanation |
|---|---|
ON |
The parameter must be set to ON,
if the file server is to be used in a Sysplex environment. This is the default
value.
|
OFF |
The file server uses the VSAM file as in previous versions. |
This parameter specifies the number of blocks to be allocated primarily to each user of the Natural file server, if the Software AG Editor buffer pool is used as storage medium.
Possible Values:
| Value | Explanation |
|---|---|
0 - 32676 |
Number of blocks to be allocated primarily. |
20 |
This is the default value. |
If the EBPFSRV parameter is set
to OFF, EBPPRAL is not used at runtime.
This parameter specifies the number of blocks to be allocated secondarily to each user of the Natural file server if the Software AG Editor buffer pool is used as storage medium. The secondary allocation is used to allocate buffer pool blocks to the user if the primary allocation amount is already exhausted.
Possible Values:
| Value | Explanation |
|---|---|
0 - 32676 |
Number of blocks to be allocated secondarily. |
10 |
This is the default value. |
If the EBPFSRV parameter is set
to OFF, EBPSEC is not used at runtime.
This parameter specifies the maximum number of blocks to be allocated to each user of the Natural file server if the Software AG Editor buffer pool is used as storage medium. This parameter serves as upper limit for the allocation of buffer pool blocks to a single user.
Possible Values:
| Value | Explanation |
|---|---|
0 - 32676 |
Maximum number of blocks to be allocated. |
100 |
This is the default value. |
If the EBPFSRV parameter is set
to OFF, EBPMAX is not used at runtime.
Note:
This parameter does not apply to Natural SQL Gateway and is
ignored.
This parameter is relevant in IMS TM MPP and message-oriented BMP environments only.
It is used to handle END TRANSACTION statements in a message-driven IMS region (MPP or message-oriented BMP).
In such a region, an END TRANSACTION cannot be executed
by the Natural/IMS interface and is therefore ignored without any notification.
In such situations, the ETIGN parameter can be used to
issue an error message instead.
Possible Values:
| Value | Explanation |
|---|---|
ON |
The END TRANSACTION error is
ignored and processing is continued. This is the default value.
|
OFF |
The END TRANSACTION error is
not ignored.
|
This parameter determines whether the Natural file server is to be used and whether it can be disabled in the case of an initialization error.
Possible Values:
| Value | Explanation |
|---|---|
ON |
Natural file server is to be used. |
OFF |
Natural file server is not to be used. This is the default value. |
DIS |
Natural file server is to be used but is to be disabled if it cannot be initialized. |
If FSERV is set to ON and the file
server is not operational, the initialization of the Natural SQL Gateway is
terminated with a corresponding Natural error message. The Natural SQL
Gatewayis disabled and any SQL call is rejected with a corresponding error
message.
This parameter specifies the maximum possible number of nested database loops accessing SQL databases.
Possible Values:
| Value | Explanation |
|---|---|
1 - 99 |
Maximum possible number of nested database loops. |
10 |
This is the default value. |
This parameter changes the sign character of positive Natural
variables which have format N, if they are filled from the SQL database system.
Usually these variables have the C as positive sign character. If
the parameter NNPSF is set to ON,
F is used as positive sign character.
Possible Values:
| Value | Explanation |
|---|---|
ON |
Positive numbers put into Natural numeric
variables by the SQL database system get the sign F.
|
OFF |
Positive numbers put into Natural numeric variables by the SQL database system remain unchanged. This is the default value. |
This parameter specifies the Natural SQL Gateway server TCP/IP hostname used to communicate from TP-monitor environments like CICS hosting Natural to ConnecX JDBC server talking to SQL databases.
Possible Values:
| Value | Explanation |
|---|---|
hostname |
This hostname designates the TCP/IP address of the Natural SQL Gateway server who communicates with the CXX JDBC server. |
’’(Empty string) |
This is the default value, meaning no Natural SQL Gateway server hostname is specified. |
NSBAHOST=IBM2.HQ.SAG
This parameter specifies the TCP/IP port number the Natural SQL Gateway server is listening to.
Possible Values:
| Value | Explanation |
|---|---|
integer |
Specifies the port number the Natural SQL Gateway server listens to. |
0 |
This is the default value, meaning no Natural SQL Gateway server port number is specified. |
NSBAPORT=4713
This parameter influences the treatment of positive sqlcodes returned
from the SQL database system. If the parameter PSCIGN is
set to OFF, a NAT3700 error message is issued. If the parameter
PSCIGN is set to ON, positive sqlcodes are
treated as if they were zero, that is, no NAT3700 error message is issued.
Possible Values:
| Value | Explanation |
|---|---|
ON |
Positive sqlcodes are treated as zero. |
OFF |
Positive sqlcodes cause a NAT3700 error message. This is the default value. |
Note:
This parameter does not apply to Natural SQL Gateway and is
ignored.
This parameter is used to automatically set the DB2 server and package
set to the values that applied when the last transaction was executed. Server
and package set are refreshed by using the CONNECT TO
server-name and SET CURRENT PACKAGESET
= 'package-name' SQL statements of DB2.
Possible Values:
| Value | Explanation |
|---|---|
ON |
An automatic refresh is performed every time before a database transaction starts and if a server or package set has been specified. |
OFF |
No automatic refresh is performed. This is the default value. |
Note:
This parameter does not apply to Natural SQL Gateway and is
ignored.
This parameter delimits the number of retries done by Natural for DB2 (NDB) in order to reposition a dynamic scrollable cursor in a pseudo-conversational environment (IMS MPP or CICS).
Possible Values:
| Value | Explanation |
|---|---|
0 - 2147483648 |
Number of retries done by Natural for DB2. |
10 |
This is the default value. |
This parameter applies only for dynamic scrollable cursors.
In pseudo-conversational environments, cursors are closed at terminal I/O. For dynamic scrollable cursors the current absolute position number and the current key column values are saved. After terminal I/O the dynamic scrollable cursor is opened again and positioned absolutely to the position of the saved absolute position. The contents of the key columns are compared with the saved values. If they match, processing continues with the next requested database operation.
If the contents of the key columns do not match the saved values, the
next rows are fetched and compared with the saved values until either the
values match or no row is found or the RETRYPO count is
exhausted. In the latter cases the cursor is repositioned to the saved position
and the prior rows are fetched and compared until either the values match or no
row is found or the RETRYPO count is exhausted. In the
latter cases a NAT3703 error message is issued. If a row is fetched whose key
columns matches the saved values, processing continues with the next database
instruction.
RETRYPO delimits the retries in each direction
(next or prior).
If RETRYPO is zero no repositioning takes
place.
This parameter determines which identifiers are generated as delimited
identifier in an SQL string. RWRDONL only takes effect
if the setting of the DELIMID parameter allows delimited
identifiers.
Possible Values:
| Value | Explanation |
|---|---|
ON |
Only identifiers that are reserved words are
generated as delimited identifiers. The list of reserved words is contained in
the NDBPARM macro. This list has been merged from the lists of
reserved words for DB2 for z/OS, DB2 for VSE/VM, DB2 for LINUX, OS/2, Windows
and UNIX, and ISO/ANSI SQL99.
This is the default value. |
OFF |
All identifiers are generated as delimited identifiers. |
Note:
This parameter does not apply to Natural SQL Gateway and is
ignored.
This parameter is used to allow dynamic execution of statically generated SQL statements if the static execution returns an error.
Possible Values:
| Value | Explanation |
|---|---|
NEVER |
Dynamic execution is never allowed. This is the default value. |
ALLWAYS |
Dynamic execution is always allowed after an error. |
SPECIAL |
Dynamic execution is allowed after special
errors only.
These special errors are:
|
The parameter macro NDBID determines the database type of an SQL DBID.
The NDBID macro is specified as follows:
Default Database Definition
The default database type is specified as follows. It applies to all
database IDs not explicitly specified by NDBID.
NDBID=database-type
Single Database Definition
A single database ID and its type is specified as follows:
NDBID=database-type,database-id
Multiple Database Definition
Multiple database IDs of the same database type can be specified together, enclosed in parentheses:
NDBID=(database-type,database-id1,database-id2,...)
| Possible Values | Explanation |
|---|---|
DB2 |
Databases are accessed via Natural for DB2 (NDB). This is the default value. |
CNX |
Databases are accessed via Natural SQL Gateway (NSB). |
| Possible Values |
|---|
1-254 |
