Informix Read-Only Access

Abstract

Informix DBAs are often asked to provide login details for a user account that should only be allowed to view data or run reports. In other database products such as Microsoft SQL Server, a suitable database level privilege is available, but this is not so easy with Informix Dynamic Server (IDS). This article describes how to achieve this, including a script to perform the bulk of the work.

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Informix Read-Only Access2021-11-19T15:38:02+00:00

Informix Connection Logging

Abstract

There is no built-in way to view the history of connections to an IBM Informix Dynamic Server (IDS) database once they have terminated. Doing so can be the key to solving questions such as where a user is located or who has been performing particular SQL actions, whether it be for auditing, application improvement, or user training. This article outlines a simple solution that can be implemented to append connection details to an external text file as a permanent record, and goes further to describe how that can then be maintained and accessed with SQL.

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Informix Connection Logging2021-02-16T15:58:43+00:00

Making Microsoft SQL Linked Server and Informix Standard engine work

Abstract

Microsoft SQL Server is a popular choice for consolidation of report data from multiple database products, as its Linked Server feature – which is included in the base product – makes it possible to access tables in heterogeneous databases within T-SQL via OLE DB or ODBC. However, the settings are not obvious that are required to make this work with Informix Standard Engine (SE) – the legacy version of Informix that uses C-ISAM to store tables (*.dat) and indexes (*.idx) in individual files (whereas Dynamic Server manages storage within its own “dbspaces”). This article reveals how to make Microsoft SQL Linked Server and Informix Standard Engine work together.

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Making Microsoft SQL Linked Server and Informix Standard engine work2020-08-14T13:21:38+01:00

Making Microsoft SQL Linked Server and DB2 work

Abstract

Microsoft SQL Server is a popular choice for consolidation of report data from multiple database products, as its Linked Server feature – which is included in the base product – makes it possible to access tables in heterogeneous databases within T-SQL via OLE DB. However, there are some settings required to make this work seamlessly, which are described in this article as they are not that obvious.

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Making Microsoft SQL Linked Server and DB2 work2020-08-18T15:29:56+01:00

Is the cloud the right place for IBM Informix?

“We saw an increase in computed throughput of 42%” Read how the free version, Innovator-C edition and Workgroup edition compare in a cloud environment when being stress tested by TPC-C benchmark. “The total daily cost was less than the price of 2 cups of coffee”

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Is the cloud the right place for IBM Informix?, 2020-08-18T15:36:03+01:00

Making Microsoft SQL Linked Server and Informix work

Abstract

Microsoft SQL Server is a popular choice for consolidation of report data from multiple database products, as its Linked Server feature – which is included in the base product unlike Informix Enterprise Gateway Manager – makes it possible to access tables in heterogeneous databases within T-SQL via OLE DB. However, there are some settings required to make this work seamlessly, which are described in this article as they are not that obvious.

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Making Microsoft SQL Linked Server and Informix work2020-08-14T12:41:16+01:00

Easy IWA: Part 4 Running a selection of TPCH Queries accelerated by IBM Informix Warehouse Accelerator 12.10.FC4

Abstract

This fourth and final article in the Easy IWA series provides a demonstration of accelerating a selection of TPCH queries, based on the TPCH warehouse queries, by IBM Informix Warehouse Accelerator. Building on previous articles, this provides the ability to accelerate a set of SQL  queries within a directory against IWA with sub-second timing, demonstrating the speed of query acceleration that can be attained. Provided with this article are the SQL queries and a driver script where a database (or multiple databases) is specified and the SQL queries are run against the specified database with the request to accelerate by IWA

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Easy IWA: Part 4 Running a selection of TPCH Queries accelerated by IBM Informix Warehouse Accelerator 12.10.FC42021-06-08T16:39:23+01:00

Easy IWA: Part 3 Creating and Loading a Data Mart under IBM Informix 12.10.FC4 and IBM Informix Warehouse Accelerator

Abstract

This third article in the Easy IWA series provides specific worked examples of creating two Data Marts under IBM Informix Dynamic Server and IBM Informix Warehouse Accelerator 12.10.FC4. Both examples use the “smart mart” utility, with the first example loading from external tables into IBM Informix tables and subsequently into an IWA Data Mart; the second loads directly into an IWA Data Mart from external tables. Both examples use the TPCH data generation utility and schema as detailed in a previous article, with the addition of the removal of unsuitable “*_comment” columns via a simple in-line pipe and sed or awk approach.

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Easy IWA: Part 3 Creating and Loading a Data Mart under IBM Informix 12.10.FC4 and IBM Informix Warehouse Accelerator2020-08-18T15:38:31+01:00

Easy IWA: Part 2 Creating an IBM Informix Warehouse Accelerator under 12.10.FC4

Abstract

This second article in the Easy IWA series details how to create an Accelerator under IBM Informix 12.10.FC4 Workgroup and Advanced editions. Worked examples to establish initial memory requirements are provided, which is key to effective and efficient resource usage and ensuring that initial provisions are reasonable. The Accelerator provides the interface between IBM Informix and the Warehouse Accelerator, performing mart administration and query processing.

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Easy IWA: Part 2 Creating an IBM Informix Warehouse Accelerator under 12.10.FC42020-08-18T15:41:53+01:00

Easy IWA: Part 1 – The TPCH database, data generation and IBM Informix 12.10.FC4

Abstract

This first article in the Easy IWA series details the regular requirement for a referentially complete database schema along with the capability to generate and load data during testing and POC exercises. This article provides information on implementing the TPCH database schema in IBM Informix, the dbgen data generation utility and loading the generated data.

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Easy IWA: Part 1 – The TPCH database, data generation and IBM Informix 12.10.FC42020-08-18T15:42:25+01:00
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