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151 lines
3.9 KiB
Plaintext
151 lines
3.9 KiB
Plaintext
--
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-- FLOAT4
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--
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CREATE TABLE FLOAT4_TBL (f1 float4);
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INSERT INTO FLOAT4_TBL(f1) VALUES ('0.0');
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INSERT INTO FLOAT4_TBL(f1) VALUES ('1004.30');
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INSERT INTO FLOAT4_TBL(f1) VALUES ('-34.84');
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INSERT INTO FLOAT4_TBL(f1) VALUES ('1.2345678901234e+20');
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INSERT INTO FLOAT4_TBL(f1) VALUES ('1.2345678901234e-20');
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-- test for over and under flow
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INSERT INTO FLOAT4_TBL(f1) VALUES ('10e40');
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ERROR: Bad float4 input format -- overflow
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INSERT INTO FLOAT4_TBL(f1) VALUES ('-10e40');
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ERROR: Bad float4 input format -- overflow
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INSERT INTO FLOAT4_TBL(f1) VALUES ('10e-40');
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ERROR: Bad float4 input format -- underflow
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INSERT INTO FLOAT4_TBL(f1) VALUES ('-10e-40');
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ERROR: Bad float4 input format -- underflow
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SELECT '' AS five, FLOAT4_TBL.*;
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five | f1
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------+-------------
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| 0
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| 1004.3
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| -34.84
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| 1.23457e+20
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| 1.23457e-20
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(5 rows)
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SELECT '' AS four, f.* FROM FLOAT4_TBL f WHERE f.f1 <> '1004.3';
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four | f1
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------+-------------
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| 0
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| -34.84
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| 1.23457e+20
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| 1.23457e-20
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(4 rows)
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SELECT '' AS one, f.* FROM FLOAT4_TBL f WHERE f.f1 = '1004.3';
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one | f1
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-----+--------
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| 1004.3
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(1 row)
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SELECT '' AS three, f.* FROM FLOAT4_TBL f WHERE '1004.3' > f.f1;
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three | f1
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-------+-------------
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| 0
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| -34.84
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| 1.23457e-20
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(3 rows)
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SELECT '' AS three, f.* FROM FLOAT4_TBL f WHERE f.f1 < '1004.3';
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three | f1
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-------+-------------
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| 0
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| -34.84
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| 1.23457e-20
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(3 rows)
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SELECT '' AS four, f.* FROM FLOAT4_TBL f WHERE '1004.3' >= f.f1;
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four | f1
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------+-------------
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| 0
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| 1004.3
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| -34.84
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| 1.23457e-20
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(4 rows)
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SELECT '' AS four, f.* FROM FLOAT4_TBL f WHERE f.f1 <= '1004.3';
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four | f1
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------+-------------
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| 0
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| 1004.3
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| -34.84
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| 1.23457e-20
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(4 rows)
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SELECT '' AS three, f.f1, f.f1 * '-10' AS x FROM FLOAT4_TBL f
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WHERE f.f1 > '0.0';
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three | f1 | x
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-------+-------------+--------------
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| 1004.3 | -10043
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| 1.23457e+20 | -1.23457e+21
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| 1.23457e-20 | -1.23457e-19
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(3 rows)
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SELECT '' AS three, f.f1, f.f1 + '-10' AS x FROM FLOAT4_TBL f
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WHERE f.f1 > '0.0';
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three | f1 | x
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-------+-------------+-------------
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| 1004.3 | 994.3
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| 1.23457e+20 | 1.23457e+20
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| 1.23457e-20 | -10
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(3 rows)
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SELECT '' AS three, f.f1, f.f1 / '-10' AS x FROM FLOAT4_TBL f
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WHERE f.f1 > '0.0';
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three | f1 | x
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-------+-------------+--------------
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| 1004.3 | -100.43
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| 1.23457e+20 | -1.23457e+19
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| 1.23457e-20 | -1.23457e-21
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(3 rows)
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SELECT '' AS three, f.f1, f.f1 - '-10' AS x FROM FLOAT4_TBL f
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WHERE f.f1 > '0.0';
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three | f1 | x
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-------+-------------+-------------
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| 1004.3 | 1014.3
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| 1.23457e+20 | 1.23457e+20
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| 1.23457e-20 | 10
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(3 rows)
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-- test divide by zero
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SELECT '' AS bad, f.f1 / '0.0' from FLOAT4_TBL f;
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ERROR: float4div: divide by zero error
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SELECT '' AS five, FLOAT4_TBL.*;
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five | f1
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------+-------------
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| 0
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| 1004.3
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| -34.84
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| 1.23457e+20
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| 1.23457e-20
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(5 rows)
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-- test the unary float4abs operator
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SELECT '' AS five, f.f1, @f.f1 AS abs_f1 FROM FLOAT4_TBL f;
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five | f1 | abs_f1
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------+-------------+-------------
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| 0 | 0
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| 1004.3 | 1004.3
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| -34.84 | 34.84
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| 1.23457e+20 | 1.23457e+20
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| 1.23457e-20 | 1.23457e-20
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(5 rows)
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UPDATE FLOAT4_TBL
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SET f1 = FLOAT4_TBL.f1 * '-1'
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WHERE FLOAT4_TBL.f1 > '0.0';
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SELECT '' AS five, FLOAT4_TBL.*;
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five | f1
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------+--------------
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| 0
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| -34.84
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| -1004.3
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| -1.23457e+20
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| -1.23457e-20
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(5 rows)
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