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Fix CREATE TABLE LIKE with not-valid check constraint

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In CREATE TABLE ... LIKE, any check constraints copied from the source
table should be set to valid if they are ENFORCED (the default).

Bug introduced in commit ca87c415e2f.

Author: jian he <jian.universality@gmail.com>
Discussion: https://www.postgresql.org/message-id/CACJufxH%3D%2Bod8Wy0P4L3_GpapNwLUP3oAes5UFRJ7yTxrM_M5kg%40mail.gmail.com
This commit is contained in:
Peter Eisentraut 2025-09-10 11:49:53 +02:00
parent e6da68a6e1
commit 33eec80940
3 changed files with 10 additions and 2 deletions
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3
src/backend/parser/parse_utilcmd.c
View File

@ -1461,7 +1461,6 @@ expandTableLikeClause(RangeVar *heapRel, TableLikeClause *table_like_clause)
char *ccname = constr->check[ccnum].ccname;
char *ccbin = constr->check[ccnum].ccbin;
bool ccenforced = constr->check[ccnum].ccenforced;
bool ccvalid = constr->check[ccnum].ccvalid;
bool ccnoinherit = constr->check[ccnum].ccnoinherit;
Node *ccbin_node;
bool found_whole_row;
@ -1492,7 +1491,7 @@ expandTableLikeClause(RangeVar *heapRel, TableLikeClause *table_like_clause)
n->conname = pstrdup(ccname);
n->location = -1;
n->is_enforced = ccenforced;
n->initially_valid = ccvalid;
n->initially_valid = ccenforced; /* sic */
n->is_no_inherit = ccnoinherit;
n->raw_expr = NULL;
n->cooked_expr = nodeToString(ccbin_node);

8
src/test/regress/expected/create_table_like.out
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@ -320,6 +320,7 @@ DROP TABLE inhz;
-- including storage and comments
CREATE TABLE ctlt1 (a text CHECK (length(a) > 2) ENFORCED PRIMARY KEY,
b text CHECK (length(b) > 100) NOT ENFORCED);
ALTER TABLE ctlt1 ADD CONSTRAINT cc CHECK (length(b) > 100) NOT VALID;
CREATE INDEX ctlt1_b_key ON ctlt1 (b);
CREATE INDEX ctlt1_fnidx ON ctlt1 ((a || b));
CREATE STATISTICS ctlt1_a_b_stat ON a,b FROM ctlt1;
@ -378,6 +379,7 @@ SELECT conname, description FROM pg_description, pg_constraint c WHERE classoid
CREATE TABLE ctlt1_inh (LIKE ctlt1 INCLUDING CONSTRAINTS INCLUDING COMMENTS) INHERITS (ctlt1);
NOTICE: merging column "a" with inherited definition
NOTICE: merging column "b" with inherited definition
NOTICE: merging constraint "cc" with inherited definition
NOTICE: merging constraint "ctlt1_a_check" with inherited definition
NOTICE: merging constraint "ctlt1_b_check" with inherited definition
\d+ ctlt1_inh
@ -387,6 +389,7 @@ NOTICE: merging constraint "ctlt1_b_check" with inherited definition
a | text | | not null | | main | | A
b | text | | | | extended | | B
Check constraints:
"cc" CHECK (length(b) > 100)
"ctlt1_a_check" CHECK (length(a) > 2)
"ctlt1_b_check" CHECK (length(b) > 100) NOT ENFORCED
Not-null constraints:
@ -409,6 +412,7 @@ NOTICE: merging multiple inherited definitions of column "a"
b | text | | | | extended | |
c | text | | | | external | |
Check constraints:
"cc" CHECK (length(b) > 100)
"ctlt1_a_check" CHECK (length(a) > 2)
"ctlt1_b_check" CHECK (length(b) > 100) NOT ENFORCED
"ctlt3_a_check" CHECK (length(a) < 5)
@ -430,6 +434,7 @@ NOTICE: merging column "a" with inherited definition
Indexes:
"ctlt13_like_expr_idx" btree ((a || c))
Check constraints:
"cc" CHECK (length(b) > 100)
"ctlt1_a_check" CHECK (length(a) > 2)
"ctlt1_b_check" CHECK (length(b) > 100) NOT ENFORCED
"ctlt3_a_check" CHECK (length(a) < 5)
@ -456,6 +461,7 @@ Indexes:
"ctlt_all_b_idx" btree (b)
"ctlt_all_expr_idx" btree ((a || b))
Check constraints:
"cc" CHECK (length(b) > 100)
"ctlt1_a_check" CHECK (length(a) > 2)
"ctlt1_b_check" CHECK (length(b) > 100) NOT ENFORCED
Statistics objects:
@ -499,6 +505,7 @@ Indexes:
"pg_attrdef_b_idx" btree (b)
"pg_attrdef_expr_idx" btree ((a || b))
Check constraints:
"cc" CHECK (length(b) > 100)
"ctlt1_a_check" CHECK (length(a) > 2)
"ctlt1_b_check" CHECK (length(b) > 100) NOT ENFORCED
Statistics objects:
@ -524,6 +531,7 @@ Indexes:
"ctlt1_b_idx" btree (b)
"ctlt1_expr_idx" btree ((a || b))
Check constraints:
"cc" CHECK (length(b) > 100)
"ctlt1_a_check" CHECK (length(a) > 2)
"ctlt1_b_check" CHECK (length(b) > 100) NOT ENFORCED
Statistics objects:

1
src/test/regress/sql/create_table_like.sql
View File

@ -130,6 +130,7 @@ DROP TABLE inhz;
-- including storage and comments
CREATE TABLE ctlt1 (a text CHECK (length(a) > 2) ENFORCED PRIMARY KEY,
b text CHECK (length(b) > 100) NOT ENFORCED);
ALTER TABLE ctlt1 ADD CONSTRAINT cc CHECK (length(b) > 100) NOT VALID;
CREATE INDEX ctlt1_b_key ON ctlt1 (b);
CREATE INDEX ctlt1_fnidx ON ctlt1 ((a || b));
CREATE STATISTICS ctlt1_a_b_stat ON a,b FROM ctlt1;