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Product Overview

The architecture of FIRST is centered around three primary components: the Command Processor, the Data Extractor, and the Output Formatter. The Command Processor is responsible for parsing user commands, validating syntax, and managing the overall execution flow. It interprets the DML-like commands, such as `SELECT * FROM CUSTOMERS WHERE city = 'New York'`, and translates them into instructions for the Data Extractor.

The Data Extractor is the core component that interacts with the CA IDMS database. It uses native APIs to connect to the database and retrieve the requested data. The Data Extractor handles the complexities of database interaction, including query optimization and data retrieval.

The Output Formatter takes the data retrieved by the Data Extractor and structures it into the format specified by the user. Supported output formats include delimited files, fixed-width formats, and reports. Communication between these components is primarily internal, using memory-based data structures and function calls.

The Command Processor initiates the data extraction process, passing instructions to the Data Extractor. The Data Extractor retrieves the data and passes it to the Output Formatter. The system relies on the underlying z/OS operating system for network communication and security.

The product does not expose any REST or SOAP APIs. The system uses the z/OS security infrastructure, such as RACF, for authentication and access control. The configuration is managed through configuration files, which specify database connection details, output file specifications, and logging settings.

The system integrates with z/OS logging and auditing facilities.

Frequently Asked Questions

What is the basic approach to data extraction in FIRST?

FIRST uses a DML-like command structure for data extraction from CA IDMS. Users define data selection criteria and output formats using these commands. The product then processes the requests against the IDMS database.

What processing modes are available?

FIRST supports batch processing and online query modes. Batch jobs are typically used for large data extracts, while online queries provide immediate access to data. The choice depends on the user's needs and the size of the data being accessed.

Can FIRST extract data from multiple IDMS databases?

FIRST can extract data from multiple IDMS databases and schemas. Users specify the target database and schema in their commands. This allows for consolidated data extraction from various sources.

What output formats does FIRST support?

FIRST supports various output formats, including delimited files, fixed-width formats, and reports. Users specify the desired format in their commands. This flexibility allows for integration with different systems.

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