This section covers the following topics:
Natural SQL Gateway can be run in the TP-monitor environments CICS and Com-plete and in TSO and as well as in a z/OS batch environment.
This section covers the following topics:
The following topics are covered below:
In order to access SQL tables from a CICS environment via Natural SQL
Gateway, the Natural SQL Gateway
Server has to be deployed. The NDBPARM parameters
NSBHOST and NSBPORT are used to
specify the address and port number of the Natural SQL Gateway server.
In a CICS environment, the file server is an optional feature to relieve the problems of switching to conversational processing. Before a screen I/O, Natural detects if there are any open cursors and if so, saves the data contained by these cursors into the file server. With the file server, database loops can be continued across terminal I/Os, but database modifications made before a terminal I/O can no longer be backed out.
For a detailed description of the file server, refer to the section Natural File Server.
In order to access SQL tables from a Com-plete environment via Natural
SQL Gateway, the Natural SQL Gateway
server has to be deployed. The NDBPARM parameters
NSBHOST and NSBPORT are used to
specify the address and port number of the Natural SQL Gateway server.
Natural SQL Gateway can run under TSO without requiring any changes to
the Natural/TSO interface. Just supply the hlq.RCI.LOAD library
from the CXX Adabas precompiler installation in the JCL.
Apart from z/OS Batch, the batch environment for Natural can also be
the TSO background, which invokes the TSO terminal monitor program by an
EXEC PGM=IKJEFT01 statement in a JCL
stream.
In a TSO environment, the file server is an optional feature to be able to emulate during development status a future CICS production environment.
With each terminal I/O, Natural issues a COMMIT
WORK command to simulate CICS or IMS TM syncpoints. Therefore,
database modifications made before a terminal I/O can no longer be backed
out.
For a detailed description of the file server, refer to the section Natural File Server.
Natural SQL Gateway can run in a z/OS batch environment. Just supply
the hlq.RCI.LOAD library from the CXX Adabas precompiler
installation in the JCL.
This section lists the known incompatibilities and constraints when using Natural SQL Gateway to access data from an SQL database system:
Most SQL database systems support packed decimal numbers with a maximal precision of 31 digits and a scale (fractional part of the number) of up to 31 digits. The scale has to be positive and not greater than the precision. Natural allows precision and scale of up to 29 digits.
Natural SQL Gateway does not support large database objects.
Natural SQL Gateway does not support stored procedures.
Natural SQL Gateway does not support static execution of Natural programs.
The message number ranges of Natural system messages related to Natural SQL Gateway are 3275 - 3286, 3700-3749, and 7386-7395.
The following table provides an overview of important terms used in the Natural SQL Gateway documentation:
| Term | Explanation |
|---|---|
| NSB | This is the product code of Natural SQL Gateway. In this documentation the product code is often used as prefix in the names of data sets, modules, etc. |
| NSERV | Short for Natural SQL Gateway server. |
| File Server | The term "file server" refers to the Natural file server. |
| DB2 | DB2 refers to the family of IBM's licensed programs for relational database management. |