Table K.1. PostgreSQL Limitations ItemUpper LimitCommentrows per tablelimited by the number of tuples that can fit onto 4,294,967,295 pagescolumns per table1600further limited by tuple size fitting on a single page; see note belowfield size1 GBidentifier length63 bytescan be increased by recompiling PostgreSQLDocumentation: 13: Appendix K. PostgreSQL Limits www.postgresql.org › docs › limits