September 25, 2025: PostgreSQL 18 Released!
Supported Versions: Current (18) / 17 / 16 / 15 / 14 / 13
Development Versions: devel
Unsupported versions: 12 / 11 / 10 / 9.6 / 9.5 / 9.4 / 9.3 / 9.2 / 9.1 / 9.0 / 8.4 / 8.3 / 8.2 / 8.1 / 8.0 / 7.4
Part VIII. Appendixes
Prev  Up PostgreSQL 17.6 Documentation Home  Next

Part VIII. Appendixes

Table of Contents

A. PostgreSQL Error Codes
B. Date/Time Support
B.1. Date/Time Input Interpretation
B.2. Handling of Invalid or Ambiguous Timestamps
B.3. Date/Time Key Words
B.4. Date/Time Configuration Files
B.5. POSIX Time Zone Specifications
B.6. History of Units
B.7. Julian Dates
C. SQL Key Words
D. SQL Conformance
D.1. Supported Features
D.2. Unsupported Features
D.3. XML Limits and Conformance to SQL/XML
E. Release Notes
E.1. Release 17.6
E.2. Release 17.5
E.3. Release 17.4
E.4. Release 17.3
E.5. Release 17.2
E.6. Release 17.1
E.7. Release 17
E.8. Prior Releases
F. Additional Supplied Modules and Extensions
F.1. amcheck — tools to verify table and index consistency
F.2. auth_delay — pause on authentication failure
F.3. auto_explain — log execution plans of slow queries
F.4. basebackup_to_shell — example "shell" pg_basebackup module
F.5. basic_archive — an example WAL archive module
F.6. bloom — bloom filter index access method
F.7. btree_gin — GIN operator classes with B-tree behavior
F.8. btree_gist — GiST operator classes with B-tree behavior
F.9. citext — a case-insensitive character string type
F.10. cube — a multi-dimensional cube data type
F.11. dblink — connect to other PostgreSQL databases
F.12. dict_int — example full-text search dictionary for integers
F.13. dict_xsyn — example synonym full-text search dictionary
F.14. earthdistance — calculate great-circle distances
F.15. file_fdw — access data files in the server's file system
F.16. fuzzystrmatch — determine string similarities and distance
F.17. hstore — hstore key/value datatype
F.18. intagg — integer aggregator and enumerator
F.19. intarray — manipulate arrays of integers
F.20. isn — data types for international standard numbers (ISBN, EAN, UPC, etc.)
F.21. lo — manage large objects
F.22. ltree — hierarchical tree-like data type
F.23. pageinspect — low-level inspection of database pages
F.24. passwordcheck — verify password strength
F.25. pg_buffercache — inspect PostgreSQL buffer cache state
F.26. pgcrypto — cryptographic functions
F.27. pg_freespacemap — examine the free space map
F.28. pg_prewarm — preload relation data into buffer caches
F.29. pgrowlocks — show a table's row locking information
F.30. pg_stat_statements — track statistics of SQL planning and execution
F.31. pgstattuple — obtain tuple-level statistics
F.32. pg_surgery — perform low-level surgery on relation data
F.33. pg_trgm — support for similarity of text using trigram matching
F.34. pg_visibility — visibility map information and utilities
F.35. pg_walinspect — low-level WAL inspection
F.36. postgres_fdw — access data stored in external PostgreSQL servers
F.37. seg — a datatype for line segments or floating point intervals
F.38. sepgsql — SELinux-, label-based mandatory access control (MAC) security module
F.39. spi — Server Programming Interface features/examples
F.40. sslinfo — obtain client SSL information
F.41. tablefunc — functions that return tables (crosstab and others)
F.42. tcn — a trigger function to notify listeners of changes to table content
F.43. test_decoding — SQL-based test/example module for WAL logical decoding
F.44. tsm_system_rows — the SYSTEM_ROWS sampling method for TABLESAMPLE
F.45. tsm_system_time — the SYSTEM_TIME sampling method for TABLESAMPLE
F.46. unaccent — a text search dictionary which removes diacritics
F.47. uuid-ossp — a UUID generator
F.48. xml2 — XPath querying and XSLT functionality
G. Additional Supplied Programs
G.1. Client Applications
G.2. Server Applications
H. External Projects
H.1. Client Interfaces
H.2. Administration Tools
H.3. Procedural Languages
H.4. Extensions
I. The Source Code Repository
I.1. Getting the Source via Git
J. Documentation
J.1. DocBook
J.2. Tool Sets
J.3. Building the Documentation with Make
J.4. Building the Documentation with Meson
J.5. Documentation Authoring
J.6. Style Guide
K. PostgreSQL Limits
L. Acronyms
M. Glossary
N. Color Support
N.1. When Color is Used
N.2. Configuring the Colors
O. Obsolete or Renamed Features
O.1. recovery.conf file merged into postgresql.conf
O.2. Default Roles Renamed to Predefined Roles
O.3. pg_xlogdump renamed to pg_waldump
O.4. pg_resetxlog renamed to pg_resetwal
O.5. pg_receivexlog renamed to pg_receivewal
Prev  Up  Next
69.3. Backup Manifest WAL Range Object  Home  Appendix A. PostgreSQL Error Codes

Submit correction

If you see anything in the documentation that is not correct, does not match your experience with the particular feature or requires further clarification, please use this form to report a documentation issue.