# PL/Tcl > implementation of the Tcl scripting language for PostgreSQL database systems **Wikidata**: [Q4046205](https://www.wikidata.org/wiki/Q4046205) **Source**: https://4ort.xyz/entity/pl-tcl ## Summary PL/Tcl is a procedural programming language that implements the Tcl scripting language for PostgreSQL database systems. It is designed specifically for writing stored procedures within PostgreSQL, allowing users to leverage Tcl's scripting capabilities directly in database operations. ## Key Facts - PL/Tcl is an implementation of the Tcl scripting language for PostgreSQL database systems. - It is classified as a procedural programming language and a domain-specific language. - The primary use of PL/Tcl is for writing stored procedures in PostgreSQL. - PL/Tcl is licensed under the PostgreSQL License. - It is copyrighted and has a user manual available in English at [https://www.postgresql.org/docs/current/pltcl.html](https://www.postgresql.org/docs/current/pltcl.html). - PL/Tcl is a dialect of the Tcl computer language. - It has sitelinks in Polish (pl) and Russian (ru) on Wikipedia. - The programming paradigm of PL/Tcl is procedural programming. - PL/Tcl has a sitelink count of 2. - It is identified in the Google Knowledge Graph with the ID /g/12397943. ## FAQs **What is PL/Tcl used for?** PL/Tcl is used for writing stored procedures in PostgreSQL database systems. It allows users to incorporate Tcl scripting directly into their database operations, enhancing flexibility and functionality. **What license does PL/Tcl use?** PL/Tcl is licensed under the PostgreSQL License, which is a permissive open-source license that allows for free use, modification, and distribution. **Is PL/Tcl a procedural programming language?** Yes, PL/Tcl is classified as a procedural programming language. It follows the procedural programming paradigm, which involves writing a sequence of computational steps to achieve a specific task. **Where can I find the user manual for PL/Tcl?** The user manual for PL/Tcl is available in English at [https://www.postgresql.org/docs/current/pltcl.html](https://www.postgresql.org/docs/current/pltcl.html). **What is the relationship between PL/Tcl and Tcl?** PL/Tcl is a dialect of the Tcl computer language. It is specifically designed to integrate Tcl scripting capabilities into PostgreSQL database systems. ## Why It Matters PL/Tcl matters because it bridges the gap between the powerful scripting capabilities of Tcl and the robust database management features of PostgreSQL. By allowing developers to write stored procedures in Tcl, PL/Tcl enhances the flexibility and functionality of PostgreSQL, making it easier to implement complex database operations and automate tasks. This integration is particularly valuable for organizations that already use Tcl for scripting and want to leverage those skills within their database systems. ## Notable For - Being an implementation of the Tcl scripting language specifically for PostgreSQL. - Enabling the use of Tcl for writing stored procedures in PostgreSQL. - Being licensed under the PostgreSQL License, which promotes open-source use and distribution. - Having a dedicated user manual for comprehensive documentation. - Being classified as both a procedural programming language and a domain-specific language. ## Body ### Overview PL/Tcl is a procedural programming language that implements the Tcl scripting language for PostgreSQL database systems. It is designed to allow users to write stored procedures in Tcl, leveraging the language's scripting capabilities within the PostgreSQL environment. ### Use and Functionality The primary use of PL/Tcl is for writing stored procedures in PostgreSQL. Stored procedures are precompiled collections of SQL statements and procedural logic that are stored in the database and can be executed as needed. By using PL/Tcl, developers can incorporate Tcl scripting directly into their database operations, enhancing the flexibility and functionality of their PostgreSQL databases. ### Licensing and Copyright PL/Tcl is licensed under the PostgreSQL License, a permissive open-source license that allows for free use, modification, and distribution. This licensing ensures that PL/Tcl can be freely used and integrated into various projects without restrictive licensing constraints. Additionally, PL/Tcl is copyrighted, protecting its intellectual property while still allowing for open-source use. ### Documentation A comprehensive user manual for PL/Tcl is available in English at [https://www.postgresql.org/docs/current/pltcl.html](https://www.postgresql.org/docs/current/pltcl.html). This manual provides detailed information on how to use PL/Tcl, including syntax, examples, and best practices for writing stored procedures in Tcl within PostgreSQL. ### Relationship to Tcl PL/Tcl is a dialect of the Tcl computer language. Tcl (Tool Command Language) is a scripting language known for its simplicity and flexibility. By implementing Tcl within PostgreSQL, PL/Tcl allows developers to use Tcl's scripting capabilities directly in their database operations, making it easier to implement complex logic and automate tasks. ### Classification PL/Tcl is classified as both a procedural programming language and a domain-specific language. As a procedural programming language, it follows the paradigm of writing a sequence of computational steps to achieve a specific task. As a domain-specific language, it is tailored specifically for use within PostgreSQL database systems, making it highly specialized and efficient for database operations. ### Wikipedia Presence PL/Tcl has sitelinks on Wikipedia in Polish (pl) and Russian (ru), indicating its international relevance and usage. These sitelinks provide additional resources and information about PL/Tcl in different languages, making it accessible to a broader audience. ### Google Knowledge Graph PL/Tcl is identified in the Google Knowledge Graph with the ID /g/12397943. This identification helps in organizing and retrieving information about PL/Tcl from various sources on the web, enhancing its visibility and accessibility. ### Programming Paradigm The programming paradigm of PL/Tcl is procedural programming. This paradigm involves writing a sequence of computational steps to achieve a specific task, making it straightforward and easy to understand for developers familiar with procedural languages. ### Sitelink Count PL/Tcl has a sitelink count of 2, indicating its presence on Wikipedia in two different languages. This count reflects the language's international reach and usage, providing resources for users in different linguistic contexts.