Fix CREATE TABLE / LIKE with bigint identity column

CREATE TABLE / LIKE with a bigint identity column would fail on
platforms where long is 32 bits.  Copying the sequence values used
makeInteger(), which would truncate the 64-bit sequence data to 32 bits.
To fix, use makeFloat() instead, like the parser.  (This does not
actually make use of floats, but stores the values as strings.)

Bug: #15096
Reviewed-by: Michael Paquier <michael@paquier.xyz>

Author: petere

src/backend/commands/sequence.c

@@ -1752,12 +1752,19 @@ sequence_options(Oid relid)
 		elog(ERROR, "cache lookup failed for sequence %u", relid);
 	pgsform = (Form_pg_sequence) GETSTRUCT(pgstuple);
 
-	options = lappend(options, makeDefElem("cache", (Node *) makeInteger(pgsform->seqcache), -1));
-	options = lappend(options, makeDefElem("cycle", (Node *) makeInteger(pgsform->seqcycle), -1));
-	options = lappend(options, makeDefElem("increment", (Node *) makeInteger(pgsform->seqincrement), -1));
-	options = lappend(options, makeDefElem("maxvalue", (Node *) makeInteger(pgsform->seqmax), -1));
-	options = lappend(options, makeDefElem("minvalue", (Node *) makeInteger(pgsform->seqmin), -1));
-	options = lappend(options, makeDefElem("start", (Node *) makeInteger(pgsform->seqstart), -1));
+	/* Use makeFloat() for 64-bit integers, like gram.y does. */
+	options = lappend(options,
+					  makeDefElem("cache", (Node *) makeFloat(psprintf(INT64_FORMAT, pgsform->seqcache)), -1));
+	options = lappend(options,
+					  makeDefElem("cycle", (Node *) makeInteger(pgsform->seqcycle), -1));
+	options = lappend(options,
+					  makeDefElem("increment", (Node *) makeFloat(psprintf(INT64_FORMAT, pgsform->seqincrement)), -1));
+	options = lappend(options,
+					  makeDefElem("maxvalue", (Node *) makeFloat(psprintf(INT64_FORMAT, pgsform->seqmax)), -1));
+	options = lappend(options,
+					  makeDefElem("minvalue", (Node *) makeFloat(psprintf(INT64_FORMAT, pgsform->seqmin)), -1));
+	options = lappend(options,
+					  makeDefElem("start", (Node *) makeFloat(psprintf(INT64_FORMAT, pgsform->seqstart)), -1));
 
 	ReleaseSysCache(pgstuple);
 

src/test/regress/expected/create_table_like.out

@@ -66,13 +66,13 @@ SELECT * FROM inhg; /* Two records with three columns in order x=x, xx=text, y=y
 (2 rows)
 
 DROP TABLE inhg;
-CREATE TABLE test_like_id_1 (a int GENERATED ALWAYS AS IDENTITY, b text);
+CREATE TABLE test_like_id_1 (a bigint GENERATED ALWAYS AS IDENTITY, b text);
 \d test_like_id_1
                      Table "public.test_like_id_1"
- Column |  Type   | Collation | Nullable |           Default            
---------+---------+-----------+----------+------------------------------
- a      | integer |           | not null | generated always as identity
- b      | text    |           |          | 
+ Column |  Type  | Collation | Nullable |           Default            
+--------+--------+-----------+----------+------------------------------
+ a      | bigint |           | not null | generated always as identity
+ b      | text   |           |          | 
 
 INSERT INTO test_like_id_1 (b) VALUES ('b1');
 SELECT * FROM test_like_id_1;
@@ -83,11 +83,11 @@ SELECT * FROM test_like_id_1;
 
 CREATE TABLE test_like_id_2 (LIKE test_like_id_1);
 \d test_like_id_2
-           Table "public.test_like_id_2"
- Column |  Type   | Collation | Nullable | Default 
---------+---------+-----------+----------+---------
- a      | integer |           | not null | 
- b      | text    |           |          | 
+          Table "public.test_like_id_2"
+ Column |  Type  | Collation | Nullable | Default 
+--------+--------+-----------+----------+---------
+ a      | bigint |           | not null | 
+ b      | text   |           |          | 
 
 INSERT INTO test_like_id_2 (b) VALUES ('b2');
 ERROR:  null value in column "a" violates not-null constraint
@@ -100,10 +100,10 @@ SELECT * FROM test_like_id_2;  -- identity was not copied
 CREATE TABLE test_like_id_3 (LIKE test_like_id_1 INCLUDING IDENTITY);
 \d test_like_id_3
                      Table "public.test_like_id_3"
- Column |  Type   | Collation | Nullable |           Default            
---------+---------+-----------+----------+------------------------------
- a      | integer |           | not null | generated always as identity
- b      | text    |           |          | 
+ Column |  Type  | Collation | Nullable |           Default            
+--------+--------+-----------+----------+------------------------------
+ a      | bigint |           | not null | generated always as identity
+ b      | text   |           |          | 
 
 INSERT INTO test_like_id_3 (b) VALUES ('b3');
 SELECT * FROM test_like_id_3;  -- identity was copied and applied

src/test/regress/sql/create_table_like.sql

@@ -37,7 +37,7 @@ INSERT INTO inhg VALUES ('x', 'foo',  'y');  /* fails due to constraint */
 SELECT * FROM inhg; /* Two records with three columns in order x=x, xx=text, y=y */
 DROP TABLE inhg;
 
-CREATE TABLE test_like_id_1 (a int GENERATED ALWAYS AS IDENTITY, b text);
+CREATE TABLE test_like_id_1 (a bigint GENERATED ALWAYS AS IDENTITY, b text);
 \d test_like_id_1
 INSERT INTO test_like_id_1 (b) VALUES ('b1');
 SELECT * FROM test_like_id_1;