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Fix CREATE TABLE / LIKE with bigint identity column

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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>
This commit is contained in:
Peter Eisentraut 2018-03-07 14:38:35 -05:00
parent 1f8a3327a9
commit 377b5ac484
3 changed files with 28 additions and 21 deletions
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19
src/backend/commands/sequence.c
View File

@ -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);

14
src/test/regress/expected/create_table_like.out
View File

@ -66,12 +66,12 @@ 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
--------+--------+-----------+----------+------------------------------
a | bigint | | not null | generated always as identity
b | text | | |
INSERT INTO test_like_id_1 (b) VALUES ('b1');
@ -85,8 +85,8 @@ 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 |
--------+--------+-----------+----------+---------
a | bigint | | not null |
b | text | | |
INSERT INTO test_like_id_2 (b) VALUES ('b2');
@ -101,8 +101,8 @@ 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
--------+--------+-----------+----------+------------------------------
a | bigint | | not null | generated always as identity
b | text | | |
INSERT INTO test_like_id_3 (b) VALUES ('b3');

2
src/test/regress/sql/create_table_like.sql
View File

@ -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;