System Catalog
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What is System Catalog?
The PostgreSQL system catalog is a set of tables and views that store metadata about the database objects, providing critical information for database management and querying. Key system catalog tables include pg_database (information about databases), pg_tables (details of tables), pg_indexes (index information), pg_class (general information about tables, indexes, and sequences), pg_attribute (column details for each table), and pg_roles (user and role information). These catalogs enable the database engine and users to efficiently manage schema, security, and query optimization, ensuring effective database operations and maintenance.
Free resources to learn System Catalog
- Official docsSystem Catalogs
- ArticleExploring the PostgreSQL System Catalogs
More in stage 12: SQL Query Patterns / Anti-patterns
- SQL Query Patterns / Anti-patterns
- Shell Scripts
- Any Programming Language
- barman
- WAL-G
- pg_dump
- pg_dumpall
- Using `pg_upgrade`
- pgbackrest
- pg_restore
- Using Logical Replication
- pg_probackup
- pg_basebackup
- Backup Validation Procedures
- Patroni
- Patroni Alternatives
- Logical Replication
- PgBouncer
- Streaming Replication
- PgBouncer Alternatives
- Simple Stateful Setup
- Helm
- Operators
- Ansible
- Salt
- Puppet
- Chef
- Prometheus
- Zabbix
- temBoard
- check_pgactivity
- check_pgbackrest
- HAProxy
- Consul
- KeepAlived
- Etcd
- Resource Usage / Provisioning / Capacity Planning
- Practical Patterns / Antipatterns
- Bulk Loading / Processing Data
- Migration Related Tools
- Data Partitioning
- Sharding Patterns
- Patterns / Antipatterns
- PgQ
- Normalization / Normal Forms
- Per-User, Per-Database Setting
- Storage Parameters
- Processes & Memory Architecture
- Vacuum Processing
- Buffer Management
- Lock Management
- Physical Storage and File Layout
- PL/pgSQL
- Procedures and Functions
- Triggers
- Recursive CTE
- Aggregate and Window functions
- OLTP
- OLAP
- HTAP
- pg_stat_activity
- EXPLAIN
- Depesz
- perf-tools
- top
- sysstat
- iotop
- pg_stat_statements
- PEV2
- Tensor
- gdb
- strace
- explain.dalibo.com
- Core Dumps
- pgCluu
- USE
- RED
- ebpf
- pgBadger
- Golden Signals
- pgcenter
- awk
- grep
- sed
System Catalog: common questions
Can I learn System Catalog in Hindi?
This lesson is written in English. Once you sign in, open it in the interactive course and ask the AI tutor to explain System Catalog in Hindi or Hinglish. The tutor answers from this lesson’s own text, so it stays on the syllabus, and it runs on your own Google, OpenAI or Anthropic key.
Is this System Catalog tutorial for beginners?
It is lesson 126 of 170 in the free PostgreSQL roadmap, in stage 12, SQL Query Patterns / Anti-patterns. If you are new to PostgreSQL, start from stage 1 and come back here in order; if you already know the earlier stages, this lesson stands on its own.