QUERY: CREATE TABLE INT4_TBL(f1 int4);
QUERY: INSERT INTO INT4_TBL(f1) VALUES ('0');
QUERY: INSERT INTO INT4_TBL(f1) VALUES ('123456');
QUERY: INSERT INTO INT4_TBL(f1) VALUES ('-123456');
QUERY: INSERT INTO INT4_TBL(f1) VALUES ('34.5');
ERROR:  pg_atoi: error in "34.5": can't parse ".5"
QUERY: INSERT INTO INT4_TBL(f1) VALUES ('2147483647');
QUERY: INSERT INTO INT4_TBL(f1) VALUES ('-2147483647');
QUERY: INSERT INTO INT4_TBL(f1) VALUES ('1000000000000');
ERROR:  pg_atoi: error reading "1000000000000": Numerical result out of range
QUERY: INSERT INTO INT4_TBL(f1) VALUES ('asdf');
ERROR:  pg_atoi: error in "asdf": can't parse "asdf"
QUERY: SELECT '' AS five, INT4_TBL.*;
five|         f1
----+-----------
    |          0
    |     123456
    |    -123456
    | 2147483647
    |-2147483647
(5 rows)

QUERY: SELECT '' AS four, i.* FROM INT4_TBL i WHERE i.f1 <> '0'::int2;
four|         f1
----+-----------
    |     123456
    |    -123456
    | 2147483647
    |-2147483647
(4 rows)

QUERY: SELECT '' AS four, i.* FROM INT4_TBL i WHERE i.f1 <> '0'::int4;
four|         f1
----+-----------
    |     123456
    |    -123456
    | 2147483647
    |-2147483647
(4 rows)

QUERY: SELECT '' AS one, i.* FROM INT4_TBL i WHERE i.f1 = '0'::int2;
one|f1
---+--
   | 0
(1 row)

QUERY: SELECT '' AS one, i.* FROM INT4_TBL i WHERE i.f1 = '0'::int4;
one|f1
---+--
   | 0
(1 row)

QUERY: SELECT '' AS two, i.* FROM INT4_TBL i WHERE i.f1 < '0'::int2;
two|         f1
---+-----------
   |    -123456
   |-2147483647
(2 rows)

QUERY: SELECT '' AS two, i.* FROM INT4_TBL i WHERE i.f1 < '0'::int4;
two|         f1
---+-----------
   |    -123456
   |-2147483647
(2 rows)

QUERY: SELECT '' AS three, i.* FROM INT4_TBL i WHERE i.f1 <= '0'::int2;
three|         f1
-----+-----------
     |          0
     |    -123456
     |-2147483647
(3 rows)

QUERY: SELECT '' AS three, i.* FROM INT4_TBL i WHERE i.f1 <= '0'::int4;
three|         f1
-----+-----------
     |          0
     |    -123456
     |-2147483647
(3 rows)

QUERY: SELECT '' AS two, i.* FROM INT4_TBL i WHERE i.f1 > '0'::int2;
two|        f1
---+----------
   |    123456
   |2147483647
(2 rows)

QUERY: SELECT '' AS two, i.* FROM INT4_TBL i WHERE i.f1 > '0'::int4;
two|        f1
---+----------
   |    123456
   |2147483647
(2 rows)

QUERY: SELECT '' AS three, i.* FROM INT4_TBL i WHERE i.f1 >= '0'::int2;
three|        f1
-----+----------
     |         0
     |    123456
     |2147483647
(3 rows)

QUERY: SELECT '' AS three, i.* FROM INT4_TBL i WHERE i.f1 >= '0'::int4;
three|        f1
-----+----------
     |         0
     |    123456
     |2147483647
(3 rows)

QUERY: SELECT '' AS one, i.* FROM INT4_TBL i WHERE (i.f1 % '2'::int2) = '1'::int2;
one|        f1
---+----------
   |2147483647
(1 row)

QUERY: SELECT '' AS three, i.* FROM INT4_TBL i WHERE (i.f1 % '2'::int4) = '0'::int2;
three|     f1
-----+-------
     |      0
     | 123456
     |-123456
(3 rows)

QUERY: SELECT '' AS five, i.f1, i.f1 * '2'::int2 AS x FROM INT4_TBL i;
five|         f1|      x
----+-----------+-------
    |          0|      0
    |     123456| 246912
    |    -123456|-246912
    | 2147483647|     -2
    |-2147483647|      2
(5 rows)

QUERY: SELECT '' AS five, i.f1, i.f1 * '2'::int4 AS x FROM INT4_TBL i;
five|         f1|      x
----+-----------+-------
    |          0|      0
    |     123456| 246912
    |    -123456|-246912
    | 2147483647|     -2
    |-2147483647|      2
(5 rows)

QUERY: SELECT '' AS five, i.f1, i.f1 + '2'::int2 AS x FROM INT4_TBL i;
five|         f1|          x
----+-----------+-----------
    |          0|          2
    |     123456|     123458
    |    -123456|    -123454
    | 2147483647|-2147483647
    |-2147483647|-2147483645
(5 rows)

QUERY: SELECT '' AS five, i.f1, i.f1 + '2'::int4 AS x FROM INT4_TBL i;
five|         f1|          x
----+-----------+-----------
    |          0|          2
    |     123456|     123458
    |    -123456|    -123454
    | 2147483647|-2147483647
    |-2147483647|-2147483645
(5 rows)

QUERY: SELECT '' AS five, i.f1, i.f1 - '2'::int2 AS x FROM INT4_TBL i;
five|         f1|         x
----+-----------+----------
    |          0|        -2
    |     123456|    123454
    |    -123456|   -123458
    | 2147483647|2147483645
    |-2147483647|2147483647
(5 rows)

QUERY: SELECT '' AS five, i.f1, i.f1 - '2'::int4 AS x FROM INT4_TBL i;
five|         f1|         x
----+-----------+----------
    |          0|        -2
    |     123456|    123454
    |    -123456|   -123458
    | 2147483647|2147483645
    |-2147483647|2147483647
(5 rows)

QUERY: SELECT '' AS five, i.f1, i.f1 / '2'::int2 AS x FROM INT4_TBL i;
five|         f1|          x
----+-----------+-----------
    |          0|          0
    |     123456|      61728
    |    -123456|     -61728
    | 2147483647| 1073741823
    |-2147483647|-1073741823
(5 rows)

QUERY: SELECT '' AS five, i.f1, i.f1 / '2'::int4 AS x FROM INT4_TBL i;
five|         f1|          x
----+-----------+-----------
    |          0|          0
    |     123456|      61728
    |    -123456|     -61728
    | 2147483647| 1073741823
    |-2147483647|-1073741823
(5 rows)

QUERY: SELECT -2+3 AS one;
one
---
  1
(1 row)

QUERY: SELECT 4-2 AS two;
two
---
  2
(1 row)

QUERY: SELECT 2- -1 AS three;
three
-----
    3
(1 row)

QUERY: SELECT 2 - -2 AS four;
four
----
   4
(1 row)

QUERY: SELECT '2'::int2 * '2'::int2 = '16'::int2 / '4'::int2 AS true;
true
----
t   
(1 row)

QUERY: SELECT '2'::int4 * '2'::int2 = '16'::int2 / '4'::int4 AS true;
true
----
t   
(1 row)

QUERY: SELECT '2'::int2 * '2'::int4 = '16'::int4 / '4'::int2 AS true;
true
----
t   
(1 row)

QUERY: SELECT '1000'::int4 < '999'::int4 AS false;
false
-----
f    
(1 row)

QUERY: SELECT 4! AS twenty_four;
twenty_four
-----------
         24
(1 row)

QUERY: SELECT !!3 AS six;
six
---
  6
(1 row)

QUERY: SELECT 1 + 1 + 1 + 1 + 1 + 1 + 1 + 1 + 1 + 1 AS ten;
ten
---
 10
(1 row)

QUERY: SELECT 2 + 2 / 2 AS three;
three
-----
    3
(1 row)

QUERY: SELECT (2 + 2) / 2 AS two;
two
---
  2
(1 row)

QUERY: SELECT dsqrt('64'::float8) AS eight;
eight
-----
    8
(1 row)

QUERY: SELECT |/'64'::float8 AS eight;
eight
-----
    8
(1 row)

QUERY: SELECT ||/'27'::float8 AS three;
three
-----
    3
(1 row)