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-rw-r--r--src/backend/utils/adt/float.c44
-rw-r--r--src/backend/utils/adt/int8.c22
-rw-r--r--src/backend/utils/adt/timestamp.c2
-rw-r--r--src/include/c.h24
-rw-r--r--src/test/regress/expected/interval.out3
-rw-r--r--src/test/regress/sql/interval.sql3
6 files changed, 43 insertions, 55 deletions
diff --git a/src/backend/utils/adt/float.c b/src/backend/utils/adt/float.c
index f81934af5e2..dd08dfcc222 100644
--- a/src/backend/utils/adt/float.c
+++ b/src/backend/utils/adt/float.c
@@ -1157,15 +1157,8 @@ dtoi4(PG_FUNCTION_ARGS)
*/
num = rint(num);
- /*
- * Range check. We must be careful here that the boundary values are
- * expressed exactly in the float domain. We expect PG_INT32_MIN to be an
- * exact power of 2, so it will be represented exactly; but PG_INT32_MAX
- * isn't, and might get rounded off, so avoid using it.
- */
- if (num < (float8) PG_INT32_MIN ||
- num >= -((float8) PG_INT32_MIN) ||
- isnan(num))
+ /* Range check */
+ if (isnan(num) || !FLOAT8_FITS_IN_INT32(num))
ereport(ERROR,
(errcode(ERRCODE_NUMERIC_VALUE_OUT_OF_RANGE),
errmsg("integer out of range")));
@@ -1189,15 +1182,8 @@ dtoi2(PG_FUNCTION_ARGS)
*/
num = rint(num);
- /*
- * Range check. We must be careful here that the boundary values are
- * expressed exactly in the float domain. We expect PG_INT16_MIN to be an
- * exact power of 2, so it will be represented exactly; but PG_INT16_MAX
- * isn't, and might get rounded off, so avoid using it.
- */
- if (num < (float8) PG_INT16_MIN ||
- num >= -((float8) PG_INT16_MIN) ||
- isnan(num))
+ /* Range check */
+ if (isnan(num) || !FLOAT8_FITS_IN_INT16(num))
ereport(ERROR,
(errcode(ERRCODE_NUMERIC_VALUE_OUT_OF_RANGE),
errmsg("smallint out of range")));
@@ -1245,15 +1231,8 @@ ftoi4(PG_FUNCTION_ARGS)
*/
num = rint(num);
- /*
- * Range check. We must be careful here that the boundary values are
- * expressed exactly in the float domain. We expect PG_INT32_MIN to be an
- * exact power of 2, so it will be represented exactly; but PG_INT32_MAX
- * isn't, and might get rounded off, so avoid using it.
- */
- if (num < (float4) PG_INT32_MIN ||
- num >= -((float4) PG_INT32_MIN) ||
- isnan(num))
+ /* Range check */
+ if (isnan(num) || !FLOAT4_FITS_IN_INT32(num))
ereport(ERROR,
(errcode(ERRCODE_NUMERIC_VALUE_OUT_OF_RANGE),
errmsg("integer out of range")));
@@ -1277,15 +1256,8 @@ ftoi2(PG_FUNCTION_ARGS)
*/
num = rint(num);
- /*
- * Range check. We must be careful here that the boundary values are
- * expressed exactly in the float domain. We expect PG_INT16_MIN to be an
- * exact power of 2, so it will be represented exactly; but PG_INT16_MAX
- * isn't, and might get rounded off, so avoid using it.
- */
- if (num < (float4) PG_INT16_MIN ||
- num >= -((float4) PG_INT16_MIN) ||
- isnan(num))
+ /* Range check */
+ if (isnan(num) || !FLOAT4_FITS_IN_INT16(num))
ereport(ERROR,
(errcode(ERRCODE_NUMERIC_VALUE_OUT_OF_RANGE),
errmsg("smallint out of range")));
diff --git a/src/backend/utils/adt/int8.c b/src/backend/utils/adt/int8.c
index 40a029cc18b..cfb094a4888 100644
--- a/src/backend/utils/adt/int8.c
+++ b/src/backend/utils/adt/int8.c
@@ -1351,15 +1351,8 @@ dtoi8(PG_FUNCTION_ARGS)
*/
num = rint(num);
- /*
- * Range check. We must be careful here that the boundary values are
- * expressed exactly in the float domain. We expect PG_INT64_MIN to be an
- * exact power of 2, so it will be represented exactly; but PG_INT64_MAX
- * isn't, and might get rounded off, so avoid using it.
- */
- if (num < (float8) PG_INT64_MIN ||
- num >= -((float8) PG_INT64_MIN) ||
- isnan(num))
+ /* Range check */
+ if (isnan(num) || !FLOAT8_FITS_IN_INT64(num))
ereport(ERROR,
(errcode(ERRCODE_NUMERIC_VALUE_OUT_OF_RANGE),
errmsg("bigint out of range")));
@@ -1393,15 +1386,8 @@ ftoi8(PG_FUNCTION_ARGS)
*/
num = rint(num);
- /*
- * Range check. We must be careful here that the boundary values are
- * expressed exactly in the float domain. We expect PG_INT64_MIN to be an
- * exact power of 2, so it will be represented exactly; but PG_INT64_MAX
- * isn't, and might get rounded off, so avoid using it.
- */
- if (num < (float4) PG_INT64_MIN ||
- num >= -((float4) PG_INT64_MIN) ||
- isnan(num))
+ /* Range check */
+ if (isnan(num) || !FLOAT4_FITS_IN_INT64(num))
ereport(ERROR,
(errcode(ERRCODE_NUMERIC_VALUE_OUT_OF_RANGE),
errmsg("bigint out of range")));
diff --git a/src/backend/utils/adt/timestamp.c b/src/backend/utils/adt/timestamp.c
index 089657371bb..972f481e59a 100644
--- a/src/backend/utils/adt/timestamp.c
+++ b/src/backend/utils/adt/timestamp.c
@@ -3410,7 +3410,7 @@ interval_mul(PG_FUNCTION_ARGS)
result->day += (int32) month_remainder_days;
#ifdef HAVE_INT64_TIMESTAMP
result_double = rint(span->time * factor + sec_remainder * USECS_PER_SEC);
- if (result_double > PG_INT64_MAX || result_double < PG_INT64_MIN)
+ if (isnan(result_double) || !FLOAT8_FITS_IN_INT64(result_double))
ereport(ERROR,
(errcode(ERRCODE_DATETIME_VALUE_OUT_OF_RANGE),
errmsg("interval out of range")));
diff --git a/src/include/c.h b/src/include/c.h
index 86e4b549754..32a804a7e81 100644
--- a/src/include/c.h
+++ b/src/include/c.h
@@ -954,6 +954,30 @@ typedef NameData *Name;
*_start++ = 0; \
} while (0)
+/*
+ * Macros for range-checking float values before converting to integer.
+ * We must be careful here that the boundary values are expressed exactly
+ * in the float domain. PG_INTnn_MIN is an exact power of 2, so it will
+ * be represented exactly; but PG_INTnn_MAX isn't, and might get rounded
+ * off, so avoid using that.
+ * The input must be rounded to an integer beforehand, typically with rint(),
+ * else we might draw the wrong conclusion about close-to-the-limit values.
+ * These macros will do the right thing for Inf, but not necessarily for NaN,
+ * so check isnan(num) first if that's a possibility.
+ */
+#define FLOAT4_FITS_IN_INT16(num) \
+ ((num) >= (float4) PG_INT16_MIN && (num) < -((float4) PG_INT16_MIN))
+#define FLOAT4_FITS_IN_INT32(num) \
+ ((num) >= (float4) PG_INT32_MIN && (num) < -((float4) PG_INT32_MIN))
+#define FLOAT4_FITS_IN_INT64(num) \
+ ((num) >= (float4) PG_INT64_MIN && (num) < -((float4) PG_INT64_MIN))
+#define FLOAT8_FITS_IN_INT16(num) \
+ ((num) >= (float8) PG_INT16_MIN && (num) < -((float8) PG_INT16_MIN))
+#define FLOAT8_FITS_IN_INT32(num) \
+ ((num) >= (float8) PG_INT32_MIN && (num) < -((float8) PG_INT32_MIN))
+#define FLOAT8_FITS_IN_INT64(num) \
+ ((num) >= (float8) PG_INT64_MIN && (num) < -((float8) PG_INT64_MIN))
+
/* ----------------------------------------------------------------
* Section 8: random stuff
diff --git a/src/test/regress/expected/interval.out b/src/test/regress/expected/interval.out
index f88f34550ad..f772909e49c 100644
--- a/src/test/regress/expected/interval.out
+++ b/src/test/regress/expected/interval.out
@@ -232,6 +232,9 @@ INSERT INTO INTERVAL_TBL_OF (f1) VALUES ('-2147483648 years');
ERROR: interval out of range
LINE 1: INSERT INTO INTERVAL_TBL_OF (f1) VALUES ('-2147483648 years'...
^
+-- Test edge-case overflow detection in interval multiplication
+select extract(epoch from '256 microseconds'::interval * (2^55)::float8);
+ERROR: interval out of range
SELECT r1.*, r2.*
FROM INTERVAL_TBL_OF r1, INTERVAL_TBL_OF r2
WHERE r1.f1 > r2.f1
diff --git a/src/test/regress/sql/interval.sql b/src/test/regress/sql/interval.sql
index bc5537d1b9c..eb1e84f053e 100644
--- a/src/test/regress/sql/interval.sql
+++ b/src/test/regress/sql/interval.sql
@@ -73,6 +73,9 @@ INSERT INTO INTERVAL_TBL_OF (f1) VALUES ('-2147483649 days');
INSERT INTO INTERVAL_TBL_OF (f1) VALUES ('2147483647 years');
INSERT INTO INTERVAL_TBL_OF (f1) VALUES ('-2147483648 years');
+-- Test edge-case overflow detection in interval multiplication
+select extract(epoch from '256 microseconds'::interval * (2^55)::float8);
+
SELECT r1.*, r2.*
FROM INTERVAL_TBL_OF r1, INTERVAL_TBL_OF r2
WHERE r1.f1 > r2.f1
generated by cgit v1.2.3 (git 2.25.1) at 2025-06-05 21:23:45 +0000