From 7711e5d605ad3dcf489792c3d678e133d5c9ca6c Mon Sep 17 00:00:00 2001 From: Tom Lane Date: Fri, 3 Oct 2003 19:26:49 +0000 Subject: [PATCH] Add GUC parameter check_function_bodies to control whether validation of function bodies is done at CREATE FUNCTION time. This is normally true but can be set false to avoid problems with forward references, wrong schema search path, etc. This is just the backend patch, still need to adjust pg_dump to make use of it. --- doc/src/sgml/runtime.sgml | 11 ++++ src/backend/catalog/pg_proc.c | 64 ++++++++++++------- src/backend/utils/misc/guc.c | 9 +++ src/backend/utils/misc/postgresql.conf.sample | 1 + 4 files changed, 62 insertions(+), 23 deletions(-) diff --git a/doc/src/sgml/runtime.sgml b/doc/src/sgml/runtime.sgml index 52c23997a1..8caf21b166 100644 --- a/doc/src/sgml/runtime.sgml +++ b/doc/src/sgml/runtime.sgml @@ -2085,6 +2085,17 @@ SET ENABLE_SEQSCAN TO OFF; + + check_function_bodies (boolean) + + + This parameter is normally true. When set false, it disables + validation of the function body string in CREATE FUNCTION. + Disabling validation is occasionally useful to avoid problems such as + forward references when restoring function definitions from a dump. + + + diff --git a/src/backend/catalog/pg_proc.c b/src/backend/catalog/pg_proc.c index 21b94d4d58..aa7f01d630 100644 --- a/src/backend/catalog/pg_proc.c +++ b/src/backend/catalog/pg_proc.c @@ -34,6 +34,10 @@ #include "utils/syscache.h" +/* GUC parameter */ +bool check_function_bodies = true; + + Datum fmgr_internal_validator(PG_FUNCTION_ARGS); Datum fmgr_c_validator(PG_FUNCTION_ARGS); Datum fmgr_sql_validator(PG_FUNCTION_ARGS); @@ -560,6 +564,11 @@ fmgr_internal_validator(PG_FUNCTION_ARGS) Datum tmp; char *prosrc; + /* + * We do not honor check_function_bodies since it's unlikely the + * function name will be found later if it isn't there now. + */ + tuple = SearchSysCache(PROCOID, ObjectIdGetDatum(funcoid), 0, 0, 0); @@ -604,6 +613,12 @@ fmgr_c_validator(PG_FUNCTION_ARGS) char *prosrc; char *probin; + /* + * It'd be most consistent to skip the check if !check_function_bodies, + * but the purpose of that switch is to be helpful for pg_dump loading, + * and for pg_dump loading it's much better if we *do* check. + */ + tuple = SearchSysCache(PROCOID, ObjectIdGetDatum(funcoid), 0, 0, 0); @@ -633,8 +648,7 @@ fmgr_c_validator(PG_FUNCTION_ARGS) /* * Validator for SQL language functions * - * Parse it here in order to be sure that it contains no syntax - * errors. + * Parse it here in order to be sure that it contains no syntax errors. */ Datum fmgr_sql_validator(PG_FUNCTION_ARGS) @@ -689,30 +703,34 @@ fmgr_sql_validator(PG_FUNCTION_ARGS) } } - tmp = SysCacheGetAttr(PROCOID, tuple, Anum_pg_proc_prosrc, &isnull); - if (isnull) - elog(ERROR, "null prosrc"); + /* Postpone body checks if !check_function_bodies */ + if (check_function_bodies) + { + tmp = SysCacheGetAttr(PROCOID, tuple, Anum_pg_proc_prosrc, &isnull); + if (isnull) + elog(ERROR, "null prosrc"); - prosrc = DatumGetCString(DirectFunctionCall1(textout, tmp)); + prosrc = DatumGetCString(DirectFunctionCall1(textout, tmp)); - /* - * We can't do full prechecking of the function definition if there - * are any polymorphic input types, because actual datatypes of - * expression results will be unresolvable. The check will be done at - * runtime instead. - * - * We can run the text through the raw parser though; this will at least - * catch silly syntactic errors. - */ - if (!haspolyarg) - { - querytree_list = pg_parse_and_rewrite(prosrc, - proc->proargtypes, - proc->pronargs); - check_sql_fn_retval(proc->prorettype, functyptype, querytree_list); + /* + * We can't do full prechecking of the function definition if there + * are any polymorphic input types, because actual datatypes of + * expression results will be unresolvable. The check will be done + * at runtime instead. + * + * We can run the text through the raw parser though; this will at + * least catch silly syntactic errors. + */ + if (!haspolyarg) + { + querytree_list = pg_parse_and_rewrite(prosrc, + proc->proargtypes, + proc->pronargs); + check_sql_fn_retval(proc->prorettype, functyptype, querytree_list); + } + else + querytree_list = pg_parse_query(prosrc); } - else - querytree_list = pg_parse_query(prosrc); ReleaseSysCache(tuple); diff --git a/src/backend/utils/misc/guc.c b/src/backend/utils/misc/guc.c index 4f18b69380..cc5d85f919 100644 --- a/src/backend/utils/misc/guc.c +++ b/src/backend/utils/misc/guc.c @@ -66,6 +66,7 @@ /* XXX these should appear in other modules' header files */ extern bool Log_connections; +extern bool check_function_bodies; extern int PreAuthDelay; extern int AuthenticationTimeout; extern int CheckPointTimeout; @@ -821,6 +822,14 @@ static struct config_bool ConfigureNamesBool[] = &add_missing_from, true, NULL, NULL }, + { + {"check_function_bodies", PGC_USERSET, CLIENT_CONN_STATEMENT, + gettext_noop("check function bodies during CREATE FUNCTION"), + NULL + }, + &check_function_bodies, + true, NULL, NULL + }, /* End-of-list marker */ { diff --git a/src/backend/utils/misc/postgresql.conf.sample b/src/backend/utils/misc/postgresql.conf.sample index c04aaab39b..c880dc4031 100644 --- a/src/backend/utils/misc/postgresql.conf.sample +++ b/src/backend/utils/misc/postgresql.conf.sample @@ -205,6 +205,7 @@ # - Statement Behavior - #search_path = '$user,public' # schema names +#check_function_bodies = true #default_transaction_isolation = 'read committed' #default_transaction_read_only = false #statement_timeout = 0 # 0 is disabled, in milliseconds -- 2.39.5