Description:
col_1’s value Precision loss after removing distinct
mysql> WITH cte_538 AS (SELECT TAN(lib26.c3) AS col_1, lib26.c3 AS col_2, ABS(lib26.c15) AS col_3 FROM t2 AS lib26) (SELECT DISTINCT mcr25.col_3 AS col_1, mcr25.col_3 AS col_2 FROM cte_538 AS mcr25) UNION ALL SELECT fuc24.c6 AS col_1, fuc24.c2 AS col_2 FROM t2 AS fuc24 WHERE (LOG(fuc24.c15) < 77);
+---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+-----------+
| col_1 | col_2 |
+---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+-----------+
| 53.9600 | 53.9600 |
| sample_pVtuVRHgHyCTAdMjTX5uDmgDFTTcRtYK4MA3VzWGhxyRAthAan095ltHnWC2wZqFzmNIz2BhrrY2h0fxo8UzijtqT3Qzyc7ydCZ760AbwzyWxKRhxPNIiXBNmglw9ylwoKoF0Q5QMAuWKKHLT07TyALEjZEq9SXDPPHZkG637npBmt2TKOxONpcXFVVrsW3jgaSAVhmwZMYON8YAyhzkhs0fsDZAohNdcrXeb43HI5de5EWnnY2lj8xyjRyfvWyVnBrhfeRiVnwUHuk0bcwoN3ueyVTRnXwQSF56ZbxUsw4hUmzUQ4GGRNJqlHOzrdMFLZHnsp5SamGZ0WPFJC1Vx1RuAnB5RdThXSIL8o2Fgebw5VIlETIWBvsuSQqrlbUxl0DbKa4xwcIiP23T8cVxdUgU4xKNvx6nab1kO47gdMcGoSGyXyvr23yKaVpjtw6XNe0uwE6zNt4nqZ1IMHxo | 3423.0000 |
+---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+-----------+
2 rows in set (0.00 sec)
mysql> WITH cte_538 AS (SELECT TAN(lib26.c3) AS col_1, lib26.c3 AS col_2, ABS(lib26.c15) AS col_3 FROM t2 AS lib26) (SELECT mcr25.col_3 AS col_1, mcr25.col_3 AS col_2 FROM cte_538 AS mcr25) UNION ALL SELECT fuc24.c6 AS col_1, fuc24.c2 AS col_2 FROM t2 AS fuc24 WHERE (LOG(fuc24.c15) < 77);
+---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+-----------+
| col_1 | col_2 |
+---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+-----------+
| 53.96 | 53.9600 |
| sample_pVtuVRHgHyCTAdMjTX5uDmgDFTTcRtYK4MA3VzWGhxyRAthAan095ltHnWC2wZqFzmNIz2BhrrY2h0fxo8UzijtqT3Qzyc7ydCZ760AbwzyWxKRhxPNIiXBNmglw9ylwoKoF0Q5QMAuWKKHLT07TyALEjZEq9SXDPPHZkG637npBmt2TKOxONpcXFVVrsW3jgaSAVhmwZMYON8YAyhzkhs0fsDZAohNdcrXeb43HI5de5EWnnY2lj8xyjRyfvWyVnBrhfeRiVnwUHuk0bcwoN3ueyVTRnXwQSF56ZbxUsw4hUmzUQ4GGRNJqlHOzrdMFLZHnsp5SamGZ0WPFJC1Vx1RuAnB5RdThXSIL8o2Fgebw5VIlETIWBvsuSQqrlbUxl0DbKa4xwcIiP23T8cVxdUgU4xKNvx6nab1kO47gdMcGoSGyXyvr23yKaVpjtw6XNe0uwE6zNt4nqZ1IMHxo | 3423.0000 |
+---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+-----------+
2 rows in set (0.00 sec)
How to repeat:
DROP DATABASE IF EXISTS test;
CREATE DATABASE IF NOT EXISTS test;
USE test;
CREATE TABLE t2 (
c1 INT NOT NULL AUTO_INCREMENT,
c2 INT NOT NULL,
c3 DECIMAL(10,2) NOT NULL,
c4 VARCHAR(50) NOT NULL,
c5 DATE NOT NULL,
c6 MEDIUMTEXT NULL,
c7 LONGTEXT NULL,
c8 MEDIUMBLOB NULL,
c9 LONGBLOB NULL,
c10 ENUM('value1','value2','value3') NULL,
c11 SET('a','b','c','d') NULL,
c12 BIT(8) NULL,
c13 DATETIME NULL,
c14 FLOAT(8,2) NULL,
c15 DOUBLE(12,4) NULL,
PRIMARY KEY (c1)
);
INSERT INTO t2 (c1, c2, c3, c4, c5, c6, c7, c8, c9, c10, c11, c12, c13, c14, c15) VALUES (994, 3423, 181.05, 'sample_wfxp8dzD7XrFnPLzr', '2024-12-16', 'sample_pVtuVRHgHyCTAdMjTX5uDmgDFTTcRtYK4MA3VzWGhxyRAthAan095ltHnWC2wZqFzmNIz2BhrrY2h0fxo8UzijtqT3Qzyc7ydCZ760AbwzyWxKRhxPNIiXBNmglw9ylwoKoF0Q5QMAuWKKHLT07TyALEjZEq9SXDPPHZkG637npBmt2TKOxONpcXFVVrsW3jgaSAVhmwZMYON8YAyhzkhs0fsDZAohNdcrXeb43HI5de5EWnnY2lj8xyjRyfvWyVnBrhfeRiVnwUHuk0bcwoN3ueyVTRnXwQSF56ZbxUsw4hUmzUQ4GGRNJqlHOzrdMFLZHnsp5SamGZ0WPFJC1Vx1RuAnB5RdThXSIL8o2Fgebw5VIlETIWBvsuSQqrlbUxl0DbKa4xwcIiP23T8cVxdUgU4xKNvx6nab1kO47gdMcGoSGyXyvr23yKaVpjtw6XNe0uwE6zNt4nqZ1IMHxo', 'sample_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', X'4DD6A6D687C6A9C08CDA93E9B48429DAA8ECBF93E891B67DDEBCDEBCE79C8A20', X'CF8CCBA2C880ED9DA9CF8644ECA5BD53E6B0AAED898E10C398D0AD', 'value1', 'a,c,b,d', b'01101010', '2025-04-25 18:28:30', 90.91, 53.96);
CREATE INDEX idx_t3_c4 ON t3 (c4);
WITH cte_538 AS (SELECT TAN(lib26.c3) AS col_1, lib26.c3 AS col_2, ABS(lib26.c15) AS col_3 FROM t2 AS lib26) (SELECT DISTINCT mcr25.col_3 AS col_1, mcr25.col_3 AS col_2 FROM cte_538 AS mcr25) UNION ALL SELECT fuc24.c6 AS col_1, fuc24.c2 AS col_2 FROM t2 AS fuc24 WHERE (LOG(fuc24.c15) < 77);
WITH cte_538 AS (SELECT TAN(lib26.c3) AS col_1, lib26.c3 AS col_2, ABS(lib26.c15) AS col_3 FROM t2 AS lib26) (SELECT mcr25.col_3 AS col_1, mcr25.col_3 AS col_2 FROM cte_538 AS mcr25) UNION ALL SELECT fuc24.c6 AS col_1, fuc24.c2 AS col_2 FROM t2 AS fuc24 WHERE (LOG(fuc24.c15) < 77);
Description: col_1’s value Precision loss after removing distinct mysql> WITH cte_538 AS (SELECT TAN(lib26.c3) AS col_1, lib26.c3 AS col_2, ABS(lib26.c15) AS col_3 FROM t2 AS lib26) (SELECT DISTINCT mcr25.col_3 AS col_1, mcr25.col_3 AS col_2 FROM cte_538 AS mcr25) UNION ALL SELECT fuc24.c6 AS col_1, fuc24.c2 AS col_2 FROM t2 AS fuc24 WHERE (LOG(fuc24.c15) < 77); +---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+-----------+ | col_1 | col_2 | +---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+-----------+ | 53.9600 | 53.9600 | | sample_pVtuVRHgHyCTAdMjTX5uDmgDFTTcRtYK4MA3VzWGhxyRAthAan095ltHnWC2wZqFzmNIz2BhrrY2h0fxo8UzijtqT3Qzyc7ydCZ760AbwzyWxKRhxPNIiXBNmglw9ylwoKoF0Q5QMAuWKKHLT07TyALEjZEq9SXDPPHZkG637npBmt2TKOxONpcXFVVrsW3jgaSAVhmwZMYON8YAyhzkhs0fsDZAohNdcrXeb43HI5de5EWnnY2lj8xyjRyfvWyVnBrhfeRiVnwUHuk0bcwoN3ueyVTRnXwQSF56ZbxUsw4hUmzUQ4GGRNJqlHOzrdMFLZHnsp5SamGZ0WPFJC1Vx1RuAnB5RdThXSIL8o2Fgebw5VIlETIWBvsuSQqrlbUxl0DbKa4xwcIiP23T8cVxdUgU4xKNvx6nab1kO47gdMcGoSGyXyvr23yKaVpjtw6XNe0uwE6zNt4nqZ1IMHxo | 3423.0000 | +---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+-----------+ 2 rows in set (0.00 sec) mysql> WITH cte_538 AS (SELECT TAN(lib26.c3) AS col_1, lib26.c3 AS col_2, ABS(lib26.c15) AS col_3 FROM t2 AS lib26) (SELECT mcr25.col_3 AS col_1, mcr25.col_3 AS col_2 FROM cte_538 AS mcr25) UNION ALL SELECT fuc24.c6 AS col_1, fuc24.c2 AS col_2 FROM t2 AS fuc24 WHERE (LOG(fuc24.c15) < 77); +---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+-----------+ | col_1 | col_2 | +---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+-----------+ | 53.96 | 53.9600 | | sample_pVtuVRHgHyCTAdMjTX5uDmgDFTTcRtYK4MA3VzWGhxyRAthAan095ltHnWC2wZqFzmNIz2BhrrY2h0fxo8UzijtqT3Qzyc7ydCZ760AbwzyWxKRhxPNIiXBNmglw9ylwoKoF0Q5QMAuWKKHLT07TyALEjZEq9SXDPPHZkG637npBmt2TKOxONpcXFVVrsW3jgaSAVhmwZMYON8YAyhzkhs0fsDZAohNdcrXeb43HI5de5EWnnY2lj8xyjRyfvWyVnBrhfeRiVnwUHuk0bcwoN3ueyVTRnXwQSF56ZbxUsw4hUmzUQ4GGRNJqlHOzrdMFLZHnsp5SamGZ0WPFJC1Vx1RuAnB5RdThXSIL8o2Fgebw5VIlETIWBvsuSQqrlbUxl0DbKa4xwcIiP23T8cVxdUgU4xKNvx6nab1kO47gdMcGoSGyXyvr23yKaVpjtw6XNe0uwE6zNt4nqZ1IMHxo | 3423.0000 | +---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+-----------+ 2 rows in set (0.00 sec) How to repeat: DROP DATABASE IF EXISTS test; CREATE DATABASE IF NOT EXISTS test; USE test; CREATE TABLE t2 ( c1 INT NOT NULL AUTO_INCREMENT, c2 INT NOT NULL, c3 DECIMAL(10,2) NOT NULL, c4 VARCHAR(50) NOT NULL, c5 DATE NOT NULL, c6 MEDIUMTEXT NULL, c7 LONGTEXT NULL, c8 MEDIUMBLOB NULL, c9 LONGBLOB NULL, c10 ENUM('value1','value2','value3') NULL, c11 SET('a','b','c','d') NULL, c12 BIT(8) NULL, c13 DATETIME NULL, c14 FLOAT(8,2) NULL, c15 DOUBLE(12,4) NULL, PRIMARY KEY (c1) ); INSERT INTO t2 (c1, c2, c3, c4, c5, c6, c7, c8, c9, c10, c11, c12, c13, c14, c15) VALUES (994, 3423, 181.05, 'sample_wfxp8dzD7XrFnPLzr', '2024-12-16', 'sample_pVtuVRHgHyCTAdMjTX5uDmgDFTTcRtYK4MA3VzWGhxyRAthAan095ltHnWC2wZqFzmNIz2BhrrY2h0fxo8UzijtqT3Qzyc7ydCZ760AbwzyWxKRhxPNIiXBNmglw9ylwoKoF0Q5QMAuWKKHLT07TyALEjZEq9SXDPPHZkG637npBmt2TKOxONpcXFVVrsW3jgaSAVhmwZMYON8YAyhzkhs0fsDZAohNdcrXeb43HI5de5EWnnY2lj8xyjRyfvWyVnBrhfeRiVnwUHuk0bcwoN3ueyVTRnXwQSF56ZbxUsw4hUmzUQ4GGRNJqlHOzrdMFLZHnsp5SamGZ0WPFJC1Vx1RuAnB5RdThXSIL8o2Fgebw5VIlETIWBvsuSQqrlbUxl0DbKa4xwcIiP23T8cVxdUgU4xKNvx6nab1kO47gdMcGoSGyXyvr23yKaVpjtw6XNe0uwE6zNt4nqZ1IMHxo', 'sample_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', X'4DD6A6D687C6A9C08CDA93E9B48429DAA8ECBF93E891B67DDEBCDEBCE79C8A20', X'CF8CCBA2C880ED9DA9CF8644ECA5BD53E6B0AAED898E10C398D0AD', 'value1', 'a,c,b,d', b'01101010', '2025-04-25 18:28:30', 90.91, 53.96); CREATE INDEX idx_t3_c4 ON t3 (c4); WITH cte_538 AS (SELECT TAN(lib26.c3) AS col_1, lib26.c3 AS col_2, ABS(lib26.c15) AS col_3 FROM t2 AS lib26) (SELECT DISTINCT mcr25.col_3 AS col_1, mcr25.col_3 AS col_2 FROM cte_538 AS mcr25) UNION ALL SELECT fuc24.c6 AS col_1, fuc24.c2 AS col_2 FROM t2 AS fuc24 WHERE (LOG(fuc24.c15) < 77); WITH cte_538 AS (SELECT TAN(lib26.c3) AS col_1, lib26.c3 AS col_2, ABS(lib26.c15) AS col_3 FROM t2 AS lib26) (SELECT mcr25.col_3 AS col_1, mcr25.col_3 AS col_2 FROM cte_538 AS mcr25) UNION ALL SELECT fuc24.c6 AS col_1, fuc24.c2 AS col_2 FROM t2 AS fuc24 WHERE (LOG(fuc24.c15) < 77);