On Fri, Jan 20, 2006 at 01:49:03AM +0000, frank church wrote: > What is the maximum length of an IN(a,b,c....d) list in PostgreSQL? > > I am using 7.4. In 7.4 and earlier it depends on the max_expr_depth setting. http://www.postgresql.org/docs/7.4/static/runtime-config.html#RUNTIME-CONFIG-CLIENT-OTHER test=> SHOW max_expr_depth; max_expr_depth ---------------- 10000 (1 row) test=> SELECT 1 FROM pg_class WHERE oid IN (1,2,3,4,5,6,7,8,9,10); ?column? ---------- (0 rows) test=> SET max_expr_depth TO 10; SET test=> SELECT 1 FROM pg_class WHERE oid IN (1,2,3,4,5,6,7,8,9,10); ERROR: expression too complex DETAIL: Nesting depth exceeds maximum expression depth 10. HINT: Increase the configuration parameter "max_expr_depth". In 8.0 and later max_expr_depth is gone and the limit depends on max_stack_depth. http://www.postgresql.org/docs/8.0/static/runtime-config.html#RUNTIME-CONFIG-RESOURCE -- Michael Fuhr
