From: Álvaro Herrera Date: Thu, 3 Jul 2025 09:46:12 +0000 (+0200) Subject: Prevent creation of duplicate not-null constraints for domains X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=647cffd2f3210818f3882a1ea40cfbe0a4ea8fd7;p=thirdparty%2Fpostgresql.git Prevent creation of duplicate not-null constraints for domains This was previously harmless, but now that we create pg_constraint rows for those, duplicates are not welcome anymore. Backpatch to 18. Co-authored-by: jian he Co-authored-by: Álvaro Herrera Discussion: https://postgr.es/m/CACJufxFSC0mcQ82bSk58sO-WJY4P-o4N6RD2M0D=DD_u_6EzdQ@mail.gmail.com --- diff --git a/src/backend/commands/typecmds.c b/src/backend/commands/typecmds.c index 45ae7472ab5..26d985193ae 100644 --- a/src/backend/commands/typecmds.c +++ b/src/backend/commands/typecmds.c @@ -939,11 +939,19 @@ DefineDomain(ParseState *pstate, CreateDomainStmt *stmt) break; case CONSTR_NOTNULL: - if (nullDefined && !typNotNull) + if (nullDefined) + { + if (!typNotNull) + ereport(ERROR, + errcode(ERRCODE_SYNTAX_ERROR), + errmsg("conflicting NULL/NOT NULL constraints"), + parser_errposition(pstate, constr->location)); + ereport(ERROR, - errcode(ERRCODE_SYNTAX_ERROR), - errmsg("conflicting NULL/NOT NULL constraints"), + errcode(ERRCODE_INVALID_OBJECT_DEFINITION), + errmsg("redundant NOT NULL constraint definition"), parser_errposition(pstate, constr->location)); + } if (constr->is_no_inherit) ereport(ERROR, errcode(ERRCODE_INVALID_OBJECT_DEFINITION), diff --git a/src/test/regress/expected/domain.out b/src/test/regress/expected/domain.out index ba6f05eeb7d..b5ea707df31 100644 --- a/src/test/regress/expected/domain.out +++ b/src/test/regress/expected/domain.out @@ -1019,6 +1019,11 @@ insert into domain_test values (1, 2); -- should fail alter table domain_test add column c str_domain; ERROR: domain str_domain does not allow null values +-- disallow duplicated not-null constraints +create domain int_domain1 as int constraint nn1 not null constraint nn2 not null; +ERROR: redundant NOT NULL constraint definition +LINE 1: ...domain int_domain1 as int constraint nn1 not null constraint... + ^ create domain str_domain2 as text check (value <> 'foo') default 'foo'; -- should fail alter table domain_test add column d str_domain2; diff --git a/src/test/regress/sql/domain.sql b/src/test/regress/sql/domain.sql index b752a63ab5f..b8f5a639712 100644 --- a/src/test/regress/sql/domain.sql +++ b/src/test/regress/sql/domain.sql @@ -602,6 +602,9 @@ insert into domain_test values (1, 2); -- should fail alter table domain_test add column c str_domain; +-- disallow duplicated not-null constraints +create domain int_domain1 as int constraint nn1 not null constraint nn2 not null; + create domain str_domain2 as text check (value <> 'foo') default 'foo'; -- should fail