What are some best practices for writing SQL queries to avoid SQLCODE -805 (package not found)?

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SQLCODE -805 is a common error that occurs when you execute a SQL query that references a package that is not found in the database. A package is a precompiled and optimized version of a SQL statement that is stored in the database and accessed by an application program. Packages are created by binding a plan, which is a collection of SQL statements and options, to the database. In this article, you will learn some best practices for writing SQL queries to avoid SQLCODE -805 and how to troubleshoot it if it occurs.

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1 Understand the package naming convention

One of the main reasons for SQLCODE -805 is that the package name specified in the SQL query does not match the package name stored in the database. To avoid this, you need to understand how packages are named and how to reference them correctly. A package name consists of two parts: a collection name and a package name. The collection name identifies the group of packages that belong to the same plan, and the package name identifies the individual package within the collection. The format of the package name is <collection name>.<package name>. For example, if you have a plan called MYPLAN that contains two packages, PKG1 and PKG2, the package names are MYPLAN.PKG1 and MYPLAN.PKG2. To reference a package in a SQL query, you need to specify both the collection name and the package name, separated by a dot.

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Shaurya Ratna

Data Analyst at Tata Consultancy | Azure, AWS and Tableau Certified | Data Engineer | Permanent Resident CA
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To prevent SQLCODE -805 errors, it's crucial to grasp package naming conventions in DB2. A package name comprises a collection name and a package name, formatted as <collection name>.<package name>. For example, in a plan named MYPLAN, packages might be MYPLAN.PKG1 and MYPLAN.PKG2. Ensure your SQL queries correctly reference packages by including both parts of the name. This approach avoids mismatches and errors. By applying your expertise in SQL performance and data engineering, you can ensure seamless package referencing and enhance DB2 application reliability.

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2 Use consistent bind options

Another reason for SQLCODE -805 is that the bind options used to create the package are different from the bind options used by the application program. Bind options are parameters that control how the SQL statements are compiled and executed, such as isolation level, optimization level, and access mode. To avoid this, you need to use consistent bind options for the same plan and package across different environments and applications. You can use the DB2 command line processor or the BIND command to specify the bind options when you create or rebind a package. You can also use the SYSPACKAGE and SYSPACKLIST tables to view the bind options of existing packages.

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Pragati Gupta

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SQLCODE -805 may occur due to disparate bind options between package creation and application program execution. Bind options, governing SQL statement compilation and execution parameters (e.g., isolation level), should remain consistent for a plan and package across environments and applications. Use DB2 commands or the BIND command to specify options during package creation or rebinding. Additionally, inspect bind options for existing packages through the SYSPACKAGE and SYSPACKLIST tables.

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Shaurya Ratna

Data Analyst at Tata Consultancy | Azure, AWS and Tableau Certified | Data Engineer | Permanent Resident CA
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To prevent SQLCODE -805 errors, ensure consistent bind options for your DB2 packages. Discrepancies between bind options used to create the package and those expected by your application can trigger this error. Use uniform bind parameters—such as isolation level and optimization level—across all environments. Leverage the DB2 command line processor or the BIND command for setting these options, and check existing package bind options using SYSPACKAGE and SYSPACKLIST tables. By applying these best practices, you can enhance the reliability of your DB2 applications and avoid common package-related issues.

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3 Rebind packages after changes

Another reason for SQLCODE -805 is that the package is outdated or invalid due to changes in the database or the application. For example, if you alter a table that is referenced by a package, or if you upgrade the DB2 version or fix pack level, the package may become incompatible or inconsistent with the current state of the database or the application. To avoid this, you need to rebind the packages after any significant changes that may affect them. Rebinding a package means recreating it with the latest bind options and validating it against the current database schema and data. You can use the DB2 command line processor or the REBIND command to rebind a package.

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Pragati Gupta

Data Science | Data Analyst | Machine Learning | Artificial Intelligence | Business Intelligence Analyst | Data Visualization | Tableau | ETL | SQL | Alteryx | Python | PowerBI | Data Analytics
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SQLCODE -805 can also occur if a package becomes outdated or invalid due to changes in the database or application. For instance, altering a table referenced by a package or upgrading DB2 may render the package incompatible. To prevent this, regularly rebind packages after significant changes, ensuring they align with the current database state. Use the DB2 command line processor or the REBIND command for this process.

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4 Handle SQLCODE -805 errors

If you encounter SQLCODE -805 errors, you need to identify the cause and take appropriate actions to resolve them. The error message will provide you with the package name that is not found and the location where it is expected. To troubleshoot the issue, verify that the package name in the SQL query matches the package name stored in the database, and check that the bind options used to create the package are consistent with those used by the application program. You can use the SYSPACKAGE and SYSPACKLIST tables to view this information. If necessary, rebind the package using DB2 command line processor or REBIND command. If none of these steps resolve the error, contact your database administrator or application developer for further assistance. By following these best practices, you can write SQL queries that avoid SQLCODE -805 errors and ensure optimal performance and reliability of your DB2 applications.

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Shaurya Ratna

Data Analyst at Tata Consultancy | Azure, AWS and Tableau Certified | Data Engineer | Permanent Resident CA
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To tackle SQLCODE -805 errors in DB2, first, identify the missing package from the error message and verify that the package name in your SQL query matches the database. Ensure that the bind options used are consistent with your application's requirements. Use the SYSPACKAGE and SYSPACKLIST tables to review package details. Rebind the package if needed with the DB2 command line processor or REBIND command. If issues persist, consult your database administrator. Leveraging your expertise in optimizing SQL can help you address these errors effectively and maintain robust DB2 performance.

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5 Here’s what else to consider

This is a space to share examples, stories, or insights that don’t fit into any of the previous sections. What else would you like to add?

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What are some best practices for writing SQL queries to avoid SQLCODE -805 (package not found)?

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1 Understand the package naming convention

2 Use consistent bind options

3 Rebind packages after changes

4 Handle SQLCODE -805 errors

5 Here’s what else to consider

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