-- -- FLOAT4 -- CREATE TABLE FLOAT4_TBL (f1 float4); INSERT INTO FLOAT4_TBL(f1) VALUES (' 0.0'); INSERT INTO FLOAT4_TBL(f1) VALUES ('1004.30 '); INSERT INTO FLOAT4_TBL(f1) VALUES (' -34.84 '); INSERT INTO FLOAT4_TBL(f1) VALUES ('1.2345678901234e+20'); INSERT INTO FLOAT4_TBL(f1) VALUES ('1.2345678901234e-20'); -- test for over and under flow INSERT INTO FLOAT4_TBL(f1) VALUES ('10e70'); INSERT INTO FLOAT4_TBL(f1) VALUES ('-10e70'); INSERT INTO FLOAT4_TBL(f1) VALUES ('10e-70'); INSERT INTO FLOAT4_TBL(f1) VALUES ('-10e-70'); INSERT INTO FLOAT4_TBL(f1) VALUES ('10e70'::float8); INSERT INTO FLOAT4_TBL(f1) VALUES ('-10e70'::float8); INSERT INTO FLOAT4_TBL(f1) VALUES ('10e-70'::float8); INSERT INTO FLOAT4_TBL(f1) VALUES ('-10e-70'::float8); INSERT INTO FLOAT4_TBL(f1) VALUES ('10e400'); INSERT INTO FLOAT4_TBL(f1) VALUES ('-10e400'); INSERT INTO FLOAT4_TBL(f1) VALUES ('10e-400'); INSERT INTO FLOAT4_TBL(f1) VALUES ('-10e-400'); -- bad input INSERT INTO FLOAT4_TBL(f1) VALUES (''); INSERT INTO FLOAT4_TBL(f1) VALUES (' '); INSERT INTO FLOAT4_TBL(f1) VALUES ('xyz'); INSERT INTO FLOAT4_TBL(f1) VALUES ('5.0.0'); INSERT INTO FLOAT4_TBL(f1) VALUES ('5 . 0'); INSERT INTO FLOAT4_TBL(f1) VALUES ('5. 0'); INSERT INTO FLOAT4_TBL(f1) VALUES (' - 3.0'); INSERT INTO FLOAT4_TBL(f1) VALUES ('123 5'); -- special inputs SELECT 'NaN'::float4; SELECT 'nan'::float4; SELECT ' NAN '::float4; SELECT 'infinity'::float4; SELECT ' -INFINiTY '::float4; -- bad special inputs SELECT 'N A N'::float4; SELECT 'NaN x'::float4; SELECT ' INFINITY x'::float4; SELECT 'Infinity'::float4 + 100.0; SELECT 'Infinity'::float4 / 'Infinity'::float4; SELECT '42'::float4 / 'Infinity'::float4; SELECT 'nan'::float4 / 'nan'::float4; SELECT 'nan'::float4 / '0'::float4; SELECT 'nan'::numeric::float4; SELECT * FROM FLOAT4_TBL; SELECT f.* FROM FLOAT4_TBL f WHERE f.f1 <> '1004.3'; SELECT f.* FROM FLOAT4_TBL f WHERE f.f1 = '1004.3'; SELECT f.* FROM FLOAT4_TBL f WHERE '1004.3' > f.f1; SELECT f.* FROM FLOAT4_TBL f WHERE f.f1 < '1004.3'; SELECT f.* FROM FLOAT4_TBL f WHERE '1004.3' >= f.f1; SELECT f.* FROM FLOAT4_TBL f WHERE f.f1 <= '1004.3'; SELECT f.f1, f.f1 * '-10' AS x FROM FLOAT4_TBL f WHERE f.f1 > '0.0'; SELECT f.f1, f.f1 / '-10' AS x FROM FLOAT4_TBL f WHERE f.f1 > '0.0'; SELECT f.f1, f.f1 - '-10' AS x FROM FLOAT4_TBL f WHERE f.f1 > '0.0'; -- test divide by zero SELECT f.f1 / '0.0' from FLOAT4_TBL f; SELECT * FROM FLOAT4_TBL; -- test the unary float4abs operator SELECT f.f1, @f.f1 AS abs_f1 FROM FLOAT4_TBL f; -- test edge-case coercions to integer SELECT '32767.4'::float4::int2; SELECT '32767.6'::float4::int2; SELECT '-32768.4'::float4::int2; SELECT '-32768.6'::float4::int2; SELECT '2147483520'::float4::int4; SELECT '2147483647'::float4::int4; SELECT '-2147483648.5'::float4::int4; SELECT '-2147483900'::float4::int4; SELECT '9223369837831520256'::float4::int8; SELECT '9223372036854775807'::float4::int8; SELECT '-9223372036854775808.5'::float4::int8; SELECT '-9223380000000000000'::float4::int8; -- Test for correct input rounding in edge cases. -- These lists are from Paxson 1991, excluding subnormals and -- inputs of over 9 sig. digits. SELECT float4send('5e-20'::float4); SELECT float4send('67e14'::float4); SELECT float4send('985e15'::float4); SELECT float4send('55895e-16'::float4); SELECT float4send('7038531e-32'::float4); SELECT float4send('702990899e-20'::float4); SELECT float4send('3e-23'::float4); SELECT float4send('57e18'::float4); SELECT float4send('789e-35'::float4); SELECT float4send('2539e-18'::float4); SELECT float4send('76173e28'::float4); SELECT float4send('887745e-11'::float4); SELECT float4send('5382571e-37'::float4); SELECT float4send('82381273e-35'::float4); SELECT float4send('750486563e-38'::float4); -- Test that the smallest possible normalized input value inputs -- correctly, either in 9-significant-digit or shortest-decimal -- format. -- -- exact val is 1.1754943508... -- shortest val is 1.1754944000 -- midpoint to next val is 1.1754944208... SELECT float4send('1.17549435e-38'::float4); SELECT float4send('1.1754944e-38'::float4);