https://blog.rajpoot.dev/categories/postgresql/ Recent content in Postgresql on Manvendra Rajpoot https://blog.rajpoot.dev/img/personal/cover.png https://blog.rajpoot.dev/img/personal/cover.png Hugo en Manvendra Rajpoot Sun, 17 May 2026 17:50:46 +0530 https://blog.rajpoot.dev/cheatsheets/sqlalchemy-postgres/01-asyncpg-psycopg-setup-cheatsheet/ Wed, 13 May 2026 06:00:00 +0530 https://blog.rajpoot.dev/cheatsheets/sqlalchemy-postgres/01-asyncpg-psycopg-setup-cheatsheet/ asyncpg vs psycopg setup, connection args, server settings, PgBouncer config. https://blog.rajpoot.dev/textbooks/sqlalchemy-postgres/01-postgres-dialects-asyncpg-psycopg/ Fri, 08 May 2026 06:00:00 +0530 https://blog.rajpoot.dev/textbooks/sqlalchemy-postgres/01-postgres-dialects-asyncpg-psycopg/ Chapter 1 — SQLAlchemy with Postgres: choosing a driver (asyncpg / psycopg / psycopg2), connection setup, server settings. https://blog.rajpoot.dev/cheatsheets/sqlalchemy-postgres/02-jsonb-cheatsheet/ Wed, 13 May 2026 06:10:00 +0530 https://blog.rajpoot.dev/cheatsheets/sqlalchemy-postgres/02-jsonb-cheatsheet/ JSONB in SQLAlchemy — column declaration, queries, indexing, updates. https://blog.rajpoot.dev/textbooks/sqlalchemy-postgres/02-postgres-types-jsonb-arrays/ Fri, 08 May 2026 06:10:00 +0530 https://blog.rajpoot.dev/textbooks/sqlalchemy-postgres/02-postgres-types-jsonb-arrays/ Chapter 2 — Postgres-specific types in SQLAlchemy: JSONB, ARRAY, ranges, citext, INTERVAL, NUMRANGE, INET. https://blog.rajpoot.dev/cheatsheets/sqlalchemy-postgres/03-arrays-cheatsheet/ Wed, 13 May 2026 06:20:00 +0530 https://blog.rajpoot.dev/cheatsheets/sqlalchemy-postgres/03-arrays-cheatsheet/ Postgres ARRAY in SQLAlchemy — column, operations, indexing. https://blog.rajpoot.dev/textbooks/sqlalchemy-postgres/03-postgres-indexes/ Fri, 08 May 2026 06:20:00 +0530 https://blog.rajpoot.dev/textbooks/sqlalchemy-postgres/03-postgres-indexes/ Chapter 3 — Postgres index types in SQLAlchemy: B-tree, GIN, GiST, BRIN, HASH, partial, expression, INCLUDE. https://blog.rajpoot.dev/cheatsheets/sqlalchemy-postgres/04-ranges-intervals-cheatsheet/ Wed, 13 May 2026 06:30:00 +0530 https://blog.rajpoot.dev/cheatsheets/sqlalchemy-postgres/04-ranges-intervals-cheatsheet/ Postgres range types, INTERVAL, citext, INET in SQLAlchemy. https://blog.rajpoot.dev/textbooks/sqlalchemy-postgres/04-full-text-search/ Fri, 08 May 2026 06:30:00 +0530 https://blog.rajpoot.dev/textbooks/sqlalchemy-postgres/04-full-text-search/ Chapter 4 — Postgres FTS via SQLAlchemy: tsvector, tsquery, GIN index, ranking, websearch. https://blog.rajpoot.dev/cheatsheets/sqlalchemy-postgres/05-indexes-cheatsheet/ Wed, 13 May 2026 06:40:00 +0530 https://blog.rajpoot.dev/cheatsheets/sqlalchemy-postgres/05-indexes-cheatsheet/ Postgres index types in SQLAlchemy — B-tree, GIN, GiST, BRIN, HASH, partial, expression, INCLUDE. https://blog.rajpoot.dev/textbooks/sqlalchemy-postgres/05-locking-advisory/ Fri, 08 May 2026 06:40:00 +0530 https://blog.rajpoot.dev/textbooks/sqlalchemy-postgres/05-locking-advisory/ Chapter 5 — Postgres locking via SQLAlchemy: row locks, advisory locks, SKIP LOCKED, queue patterns. https://blog.rajpoot.dev/cheatsheets/sqlalchemy-postgres/06-fts-cheatsheet/ Wed, 13 May 2026 06:50:00 +0530 https://blog.rajpoot.dev/cheatsheets/sqlalchemy-postgres/06-fts-cheatsheet/ Postgres FTS in SQLAlchemy — tsvector, tsquery, GIN, ranking, websearch. https://blog.rajpoot.dev/textbooks/sqlalchemy-postgres/06-listen-notify/ Fri, 08 May 2026 06:50:00 +0530 https://blog.rajpoot.dev/textbooks/sqlalchemy-postgres/06-listen-notify/ Chapter 6 — Postgres LISTEN/NOTIFY via asyncpg + SQLAlchemy: real-time triggers, queue wakeup, low-latency events. https://blog.rajpoot.dev/cheatsheets/sqlalchemy-postgres/07-locking-cheatsheet/ Wed, 13 May 2026 07:00:00 +0530 https://blog.rajpoot.dev/cheatsheets/sqlalchemy-postgres/07-locking-cheatsheet/ Postgres locking via SQLAlchemy — FOR UPDATE, NOWAIT, SKIP LOCKED, advisory locks. https://blog.rajpoot.dev/textbooks/sqlalchemy-postgres/07-partitioning/ Fri, 08 May 2026 07:00:00 +0530 https://blog.rajpoot.dev/textbooks/sqlalchemy-postgres/07-partitioning/ Chapter 7 — Postgres partitioning with SQLAlchemy: declarative partitions, range/list/hash, pg_partman. https://blog.rajpoot.dev/cheatsheets/sqlalchemy-postgres/08-listen-notify-cheatsheet/ Wed, 13 May 2026 07:10:00 +0530 https://blog.rajpoot.dev/cheatsheets/sqlalchemy-postgres/08-listen-notify-cheatsheet/ Postgres LISTEN/NOTIFY via asyncpg — real-time pub/sub for SQLAlchemy apps. https://blog.rajpoot.dev/textbooks/sqlalchemy-postgres/08-rls-multitenancy/ Fri, 08 May 2026 07:10:00 +0530 https://blog.rajpoot.dev/textbooks/sqlalchemy-postgres/08-rls-multitenancy/ Chapter 8 — Postgres RLS via SQLAlchemy: per-row tenant isolation with Postgres RLS policies. https://blog.rajpoot.dev/cheatsheets/sqlalchemy-postgres/09-rls-multitenancy-cheatsheet/ Wed, 13 May 2026 07:20:00 +0530 https://blog.rajpoot.dev/cheatsheets/sqlalchemy-postgres/09-rls-multitenancy-cheatsheet/ Postgres RLS in SQLAlchemy — policies, contextvars, app role. https://blog.rajpoot.dev/textbooks/sqlalchemy-postgres/09-upsert-bulk/ Fri, 08 May 2026 07:20:00 +0530 https://blog.rajpoot.dev/textbooks/sqlalchemy-postgres/09-upsert-bulk/ Chapter 9 — Postgres upsert (ON CONFLICT) via SQLAlchemy, bulk insert, COPY for huge loads. https://blog.rajpoot.dev/cheatsheets/sqlalchemy-postgres/10-upsert-bulk-cheatsheet/ Wed, 13 May 2026 07:30:00 +0530 https://blog.rajpoot.dev/cheatsheets/sqlalchemy-postgres/10-upsert-bulk-cheatsheet/ Postgres-specific upsert / RETURNING / COPY in SQLAlchemy. https://blog.rajpoot.dev/textbooks/sqlalchemy-postgres/10-replication-failover-pgvector/ Fri, 08 May 2026 07:30:00 +0530 https://blog.rajpoot.dev/textbooks/sqlalchemy-postgres/10-replication-failover-pgvector/ Chapter 10 — Replication, failover handling, and pgvector with SQLAlchemy. https://blog.rajpoot.dev/cheatsheets/sqlalchemy-postgres/11-partitioning-cheatsheet/ Wed, 13 May 2026 07:40:00 +0530 https://blog.rajpoot.dev/cheatsheets/sqlalchemy-postgres/11-partitioning-cheatsheet/ Postgres partitioning in SQLAlchemy — range/list/hash partitions, pg_partman. https://blog.rajpoot.dev/cheatsheets/sqlalchemy-postgres/12-pgvector-cheatsheet/ Wed, 13 May 2026 07:50:00 +0530 https://blog.rajpoot.dev/cheatsheets/sqlalchemy-postgres/12-pgvector-cheatsheet/ pgvector with SQLAlchemy — vector column, HNSW / IVFFlat indexes, similarity queries. https://blog.rajpoot.dev/cheatsheets/sqlalchemy-postgres/12-schema-per-tenant-cheatsheet/ Wed, 13 May 2026 07:50:00 +0530 https://blog.rajpoot.dev/cheatsheets/sqlalchemy-postgres/12-schema-per-tenant-cheatsheet/ Schema-per-tenant pattern in SQLAlchemy with Postgres. https://blog.rajpoot.dev/cheatsheets/sqlalchemy-postgres/13-backup-pitr-cheatsheet/ Wed, 13 May 2026 08:00:00 +0530 https://blog.rajpoot.dev/cheatsheets/sqlalchemy-postgres/13-backup-pitr-cheatsheet/ Postgres backup options — pg_dump, pg_basebackup, pgBackRest, WAL archiving, point-in-time recovery. https://blog.rajpoot.dev/cheatsheets/sqlalchemy-postgres/13-db-per-tenant-cheatsheet/ Wed, 13 May 2026 08:00:00 +0530 https://blog.rajpoot.dev/cheatsheets/sqlalchemy-postgres/13-db-per-tenant-cheatsheet/ DB-per-tenant pattern in SQLAlchemy — engine cache, lifespan, migrations. https://blog.rajpoot.dev/cheatsheets/sqlalchemy-postgres/14-pgvector-cheatsheet/ Wed, 13 May 2026 08:10:00 +0530 https://blog.rajpoot.dev/cheatsheets/sqlalchemy-postgres/14-pgvector-cheatsheet/ pgvector in SQLAlchemy — vector columns, distance queries, HNSW / IVFFlat indexes. https://blog.rajpoot.dev/cheatsheets/sqlalchemy-postgres/14-replication-failover-cheatsheet/ Wed, 13 May 2026 08:10:00 +0530 https://blog.rajpoot.dev/cheatsheets/sqlalchemy-postgres/14-replication-failover-cheatsheet/ Postgres replication + failover with SQLAlchemy — streaming, logical, Patroni, multi-host URL. https://blog.rajpoot.dev/cheatsheets/sqlalchemy-postgres/15-maintenance-cheatsheet/ Wed, 13 May 2026 08:20:00 +0530 https://blog.rajpoot.dev/cheatsheets/sqlalchemy-postgres/15-maintenance-cheatsheet/ Postgres maintenance — VACUUM, ANALYZE, REINDEX, bloat checks, autovacuum tuning. https://blog.rajpoot.dev/cheatsheets/sqlalchemy-postgres/15-replication-failover-cheatsheet/ Wed, 13 May 2026 08:20:00 +0530 https://blog.rajpoot.dev/cheatsheets/sqlalchemy-postgres/15-replication-failover-cheatsheet/ Postgres replication via SQLAlchemy — write/read engines, multi-host failover. https://blog.rajpoot.dev/cheatsheets/sqlalchemy-postgres/16-extensions-cheatsheet/ Wed, 13 May 2026 08:30:00 +0530 https://blog.rajpoot.dev/cheatsheets/sqlalchemy-postgres/16-extensions-cheatsheet/ Postgres extensions — pg_trgm, citext, uuid-ossp, pg_partman, pg_cron, pgvector, postgis. https://blog.rajpoot.dev/cheatsheets/sqlalchemy-postgres/16-vacuum-maintenance-cheatsheet/ Wed, 13 May 2026 08:30:00 +0530 https://blog.rajpoot.dev/cheatsheets/sqlalchemy-postgres/16-vacuum-maintenance-cheatsheet/ Postgres maintenance — VACUUM, ANALYZE, bloat, REINDEX, autovacuum tuning. https://blog.rajpoot.dev/cheatsheets/sqlalchemy-postgres/17-pg-stat-slow-queries-cheatsheet/ Wed, 13 May 2026 08:40:00 +0530 https://blog.rajpoot.dev/cheatsheets/sqlalchemy-postgres/17-pg-stat-slow-queries-cheatsheet/ Postgres slow-query diagnosis — pg_stat_statements, auto_explain, log_min_duration_statement. https://blog.rajpoot.dev/cheatsheets/sqlalchemy-postgres/18-backup-pitr-cheatsheet/ Wed, 13 May 2026 08:50:00 +0530 https://blog.rajpoot.dev/cheatsheets/sqlalchemy-postgres/18-backup-pitr-cheatsheet/ Postgres backups, PITR, pgBackRest, restore drills. https://blog.rajpoot.dev/cheatsheets/sqlalchemy-postgres/19-operational-patterns-cheatsheet/ Wed, 13 May 2026 09:00:00 +0530 https://blog.rajpoot.dev/cheatsheets/sqlalchemy-postgres/19-operational-patterns-cheatsheet/ Production operational patterns — PgBouncer, role separation, statement timeouts, connection limits. https://blog.rajpoot.dev/cheatsheets/sqlalchemy-postgres/20-extensions-cheatsheet/ Wed, 13 May 2026 09:10:00 +0530 https://blog.rajpoot.dev/cheatsheets/sqlalchemy-postgres/20-extensions-cheatsheet/ Postgres extensions catalog — the ones you'll actually use. https://blog.rajpoot.dev/posts/postgresql/postgres-as-queue-2026/ Sun, 03 May 2026 06:40:00 +0530 https://blog.rajpoot.dev/posts/postgresql/postgres-as-queue-2026/ Postgres as a job queue in 2026 — SKIP LOCKED, LISTEN/NOTIFY, retry/backoff, and when boring beats Redis/Kafka. https://blog.rajpoot.dev/posts/postgresql/postgres-locks-2026/ Sun, 03 May 2026 06:30:00 +0530 https://blog.rajpoot.dev/posts/postgresql/postgres-locks-2026/ Postgres locking patterns in 2026 — row locks, advisory locks, lock modes, deadlock detection, and the patterns from production. https://blog.rajpoot.dev/posts/postgresql/postgres-jsonb-2026/ Sat, 02 May 2026 10:30:00 +0530 https://blog.rajpoot.dev/posts/postgresql/postgres-jsonb-2026/ Postgres JSONB in 2026 — indexing strategies, query patterns, performance, and when to use JSONB vs proper columns. https://blog.rajpoot.dev/posts/postgresql/postgres-partitioning-2026/ Sat, 02 May 2026 08:10:00 +0530 https://blog.rajpoot.dev/posts/postgresql/postgres-partitioning-2026/ Practical Postgres partitioning in 2026 — when to partition, partition strategies, pg_partman automation, and the patterns from large-scale Postgres. https://blog.rajpoot.dev/posts/postgresql/postgresql-replication-topology-2026/ Sat, 02 May 2026 08:00:00 +0530 https://blog.rajpoot.dev/posts/postgresql/postgresql-replication-topology-2026/ Postgres replication topologies in 2026 — streaming, logical, hot standby, cascading, and the patterns from production teams. https://blog.rajpoot.dev/posts/postgresql/postgres-pgvector-hybrid-search-2026/ Fri, 01 May 2026 04:00:00 +0530 https://blog.rajpoot.dev/posts/postgresql/postgres-pgvector-hybrid-search-2026/ How to build hybrid search in Postgres in 2026 — combining pgvector and full-text search with RRF fusion, plus a reranker, for production RAG. https://blog.rajpoot.dev/posts/postgresql/postgres-time-series-vs-timescale-2026/ Thu, 30 Apr 2026 23:20:00 +0530 https://blog.rajpoot.dev/posts/postgresql/postgres-time-series-vs-timescale-2026/ Time-series in Postgres in 2026 — when vanilla Postgres + partitioning is enough, when TimescaleDB earns its cost, and when to move to ClickHouse. https://blog.rajpoot.dev/posts/postgresql/postgres-row-level-security-2026/ Thu, 30 Apr 2026 22:10:00 +0530 https://blog.rajpoot.dev/posts/postgresql/postgres-row-level-security-2026/ Postgres row-level security in 2026 — policies, tenant isolation, performance, and the patterns that prevent cross-tenant leaks. https://blog.rajpoot.dev/posts/postgresql/postgres-vacuum-bloat-2026/ Thu, 30 Apr 2026 19:30:00 +0530 https://blog.rajpoot.dev/posts/postgresql/postgres-vacuum-bloat-2026/ Postgres VACUUM, autovacuum tuning, bloat detection, and the operational patterns that keep large Postgres tables performant in 2026. https://blog.rajpoot.dev/posts/postgresql/postgresql-performance-tuning-2026/ Thu, 30 Apr 2026 15:30:00 +0530 https://blog.rajpoot.dev/posts/postgresql/postgresql-performance-tuning-2026/ A practical Postgres performance tuning cheat sheet for 2026 — config knobs, indexing, EXPLAIN reading, vacuum, connection pools, and the diagnostics that find slow queries fast. https://blog.rajpoot.dev/posts/postgresql/postgresql-partitioning-2026/ Thu, 30 Apr 2026 15:20:00 +0530 https://blog.rajpoot.dev/posts/postgresql/postgresql-partitioning-2026/ Postgres table partitioning in 2026 — range, list, hash partitioning, partition pruning, attach/detach, and the patterns for huge tables. https://blog.rajpoot.dev/posts/postgresql/postgresql-replication-ha-2026/ Thu, 30 Apr 2026 15:10:00 +0530 https://blog.rajpoot.dev/posts/postgresql/postgresql-replication-ha-2026/ Postgres high availability in 2026 — streaming replication, logical replication, Patroni / pg_auto_failover, and the patterns for zero-downtime ops. https://blog.rajpoot.dev/posts/postgresql/postgres-cdc-debezium-logical-replication-2026/ Thu, 30 Apr 2026 11:10:00 +0530 https://blog.rajpoot.dev/posts/postgresql/postgres-cdc-debezium-logical-replication-2026/ Postgres change-data-capture in 2026 — logical replication, Debezium, pgoutput, and how to stream every DB change to Kafka, NATS, ClickHouse, or your search index. https://blog.rajpoot.dev/posts/postgresql/distributed-sql-cockroachdb-spanner-yugabyte-2026/ Thu, 30 Apr 2026 09:50:00 +0530 https://blog.rajpoot.dev/posts/postgresql/distributed-sql-cockroachdb-spanner-yugabyte-2026/ When to reach for distributed SQL in 2026 — CockroachDB, Spanner, Yugabyte, AlloyDB, TiDB — and when single-node Postgres is still the right call. https://blog.rajpoot.dev/posts/postgresql/postgresql-mvcc-isolation-locking/ Wed, 29 Apr 2026 10:30:00 +0530 https://blog.rajpoot.dev/posts/postgresql/postgresql-mvcc-isolation-locking/ PostgreSQL MVCC, isolation levels, and locking explained for backend developers — read committed vs repeatable read vs serializable, row locks, deadlocks, and the patterns that keep transactions correct. https://blog.rajpoot.dev/posts/postgresql/postgresql-18-features-developers-guide/ Wed, 29 Apr 2026 09:00:00 +0530 https://blog.rajpoot.dev/posts/postgresql/postgresql-18-features-developers-guide/ PostgreSQL 18's most important features for developers — async I/O for up to 3× read perf, native uuidv7(), virtual generated columns, OAuth auth, EXPLAIN buffers by default, and the upgrade gotchas. https://blog.rajpoot.dev/posts/postgresql/postgresql-jsonb-advanced-patterns/ Tue, 28 Apr 2026 20:00:00 +0530 https://blog.rajpoot.dev/posts/postgresql/postgresql-jsonb-advanced-patterns/ Advanced PostgreSQL JSONB patterns for production — GIN indexing strategies, query operators, partial indexes, generated columns, and the performance pitfalls that bite at scale. https://blog.rajpoot.dev/posts/postgresql/pgvector-deep-dive-hnsw-tuning/ Tue, 28 Apr 2026 16:50:00 +0530 https://blog.rajpoot.dev/posts/postgresql/pgvector-deep-dive-hnsw-tuning/ A serious deep dive into pgvector — index types (HNSW vs IVFFlat), distance operators, build parameters, ef_search tuning, and how to make Postgres a competent vector database in production. https://blog.rajpoot.dev/posts/postgresql/postgresql-full-text-search/ Tue, 28 Apr 2026 14:05:00 +0530 https://blog.rajpoot.dev/posts/postgresql/postgresql-full-text-search/ How to add real full-text search to your app using only PostgreSQL — tsvector, tsquery, ranking, GIN indexes, and how to know when to graduate to Elasticsearch. https://blog.rajpoot.dev/posts/postgresql/postgresql-indexing-and-explain/ Tue, 28 Apr 2026 14:00:00 +0530 https://blog.rajpoot.dev/posts/postgresql/postgresql-indexing-and-explain/ A practical, hands-on guide to PostgreSQL indexing and reading EXPLAIN plans — when to add indexes, what kinds to use, and how to debug slow queries. https://blog.rajpoot.dev/posts/fastapi/fastapi-with-sqlalchemy/ Tue, 28 Apr 2026 13:45:00 +0530 https://blog.rajpoot.dev/posts/fastapi/fastapi-with-sqlalchemy/ A practical guide to wiring FastAPI to PostgreSQL with SQLAlchemy 2.0 (async), Alembic migrations, and a sane project structure. https://blog.rajpoot.dev/posts/postgresql/postgresql-fundamentals/ Tue, 28 Apr 2026 13:00:00 +0530 https://blog.rajpoot.dev/posts/postgresql/postgresql-fundamentals/ A practical primer on PostgreSQL — the data types, indexing, transactions, and JSONB features that backend developers reach for every day. https://blog.rajpoot.dev/posts/django/connect-postgresql-with-django/ Sun, 21 Jan 2024 22:14:54 +0530 https://blog.rajpoot.dev/posts/django/connect-postgresql-with-django/ A complete walkthrough for setting up PostgreSQL and wiring it up to a Django project, including environment variables, sensible defaults, and common pitfalls.