Must Know Postgres Extension for DBA and Developer during Migration
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The document provides an overview of essential PostgreSQL extensions beneficial for database administrators and developers, particularly during migration from other database systems like Oracle and MSSQL. Key highlights include the concept of extensions, specific extensions such as pg_stat_statements, pg_hint_plan, and orafce, and tools for enhancing SQL performance and managing compliance. The author, Deepak Mahto, emphasizes the versatility of PostgreSQL's extensibility and shares additional resources for further exploration.
Must Know Postgres Extension for DBA and Developer during Migration
- 1. Must-Know Postgres Extensions for DBAs and Developers During Migration Deepak Mahto DataCloudGaze Consulting
- 2. © 2024 All Rights Reserved About Me I am Deepak Mahto, and I like to call myself a Database Guy. ● Founder of DataCloudGaze Consulting. ● I have 15+ years of database experience, with more than 7 years in cloud and migrations. ● I have published 150+ technical blogs on databases. ● I live in Mumbai and have a 3-year-old child. ● Loves to explore street food.
- 3. © 2024 All Rights Reserved Agenda ● What are Postgres Extensions and Their Importance ● Some Fun Facts About Extensions ● List of Extensions to Aid in Migration from Heterogeneous Sources Like Oracle and MSSQL
- 4. © 2024 All Rights Reserved What is extension? PostgreSQL's extensibility allows for seamless integration of extensions, making them function like built-in features, thus enhancing its capabilities and flexibility.
- 5. © 2024 All Rights Reserved Extensive versatility of Extension’s Reference - https://cloud.tembo.io
- 6. © 2024 All Rights Reserved Create Extension in Postgres CREATE EXTENSION loads and manages new extensions, requiring appropriate privileges.
- 7. © 2024 All Rights Reserved Postgres fun fact - default extension. PL/pgSQL is a loadable procedural language for the PostgreSQL database system that is default extension created with each new database.
- 8. © 2024 All Rights Reserved More supported Procedural Language as extensions ● PL/R - PostgreSQL support for R as a procedural language (PL) ● PL/V8 - A procedural language in JavaScript powered by V8 ● PL/Tcl - Tcl procedural language for PostgreSQL. ● PL/Perl - The Perl procedural language for PostgreSQL. ● PL/Rust - Procedural language in the Rust programming. ● PL/Python - Untrusted procedural language for PostgreSQL. More..
- 9. pg_stat_statements Track statistics of SQL planning and execution
- 10. pg_stat_statements - toplevel to track nested calls. Problematic SQL!
- 11. pg_stat_statements - toplevel to track nested calls. *pg_stat_statements.track = 'all' (only for non prod or specific session) Identify problematic sql within procedural block.
- 12. © 2024 All Rights Reserved pg_hint_plan - Influence sql performance Makes it possible to tweak PostgreSQL execution plans using so-called "hints" in SQL comments Influence access path and Join method
- 13. hypopg - Invisible Indexes PostgreSQL extension adding support for hypothetical indexes Validate and test indexes before actually creating it.
- 14. orafce - Oracle’s compatibility functions and packages Emulate a subset of functions and packages from the Oracle RDBMS.
- 15. oracle_fdw - Foreign Data Wrapper for Oracle Facilitate seamless data migration and integration between Oracle databases and PostgreSQL.
- 16. pgtt - Temporary Table across schema Use Oracle-style Global Temporary Tables and the others RDBMS. Session 1 Session 2
- 17. pgaudit - Compliance and Regulatory provides detailed session and/or object audit logging via the standard PostgreSQL logging facility.
- 18. pgaudit Configuring custom logging based on compliance requirement.
- 19. Table Partitioning Maintenance – pg_partman/pg_cron
- 20. © 2024 All Rights Reserved PL/pgSQL Conversion - Challenge postgres=# SELECT func_demo1(); ERROR: column "col1" does not exist LINE 1: SELECT 1 WHERE COL1 = 1 QUERY: SELECT 1 WHERE COL1 = 1 CONTEXT: PL/pgSQLfunction func_demo1() line 4 at SQL statement PL/pgSQL functions aren't syntax-checked until executed.
- 21. © 2024 All Rights Reserved plpgsql_check extension to rescue. Extension serves as a comprehensive linter for plpgsql in Postgres ● Utilizes the internal PostgreSQL parser/evaluator to display runtime errors. ● Parses SQL inside routines to identify errors not typically found during "CREATE PROCEDURE/FUNCTION" commands. ● The plpgsql_check extension detects issues in PL/pgSQL code: undefined/unused variables, type mismatches, control flow errors, incorrect function calls, trigger problems, and SQL statement errors.
- 22. © 2024 All Rights Reserved Some more essential extensions - pg_repack - lets you remove bloat from tables and indexes as online. - pglogical - PostgreSQL Logical Replication - Change Data Capture. - hydra_columnar - Analytics- Columnar storage for Postgres - passwordcheck* - Checks and rejects weak passwords. - postgresql_anonymizer - Anonymization & Data Masking. - auto_explain - logging execution plans of slow statements automatically.
- 23. © 2024 All Rights Reserved Thank you! https://www.datacloudgaze.com/ https://www.linkedin.com/in/mahtodeepak/ https://x.com/mahtodeepak05 https://databaserookies.wordpress.com/