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MDEV-30879 Add support for up to BASE 62 to CONV()

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BASE 62 uses 0-9, A-Z and then a-z to give the numbers 0-61. This patch
increases the range of the string functions to cover this.

Based on ideas and tests in PR #2589, but re-written into the charset
functions.

Includes fix by Sergei, UBSAN complained:
ctype-simple.c:683:38: runtime error: negation of -9223372036854775808
cannot be represented in type 'long long int'; cast to an unsigned
type to negate this value to itself

Co-authored-by: Weijun Huang <huangweijun1001@gmail.com>
Co-authored-by: Sergei Golubchik <serg@mariadb.org>
This commit is contained in:
Andrew Hutchings
2023-11-17 17:41:23 +00:00
committed by Andrew Hutchings
parent be6d48fd53
commit f552febe43
10 changed files with 160 additions and 22 deletions
Download Patch File Download Diff File Expand all files Collapse all files

39
mysql-test/main/func_str.test
View File

@ -570,7 +570,7 @@ SELECT lpad(12345, 5, "#");
#
SELECT conv(71, 10, 36), conv('1Z', 36, 10);
SELECT conv(71, 10, 37), conv('1Z', 37, 10), conv(0,1,10),conv(0,0,10), conv(0,-1,10);
SELECT conv(71, 10, 63), conv('1Z', 63, 10), conv(0,1,10),conv(0,0,10), conv(0,-1,10);
#
# Bug in SUBSTRING when mixed with CONCAT and ORDER BY (Bug #3089)
@ -2481,3 +2481,40 @@ select aes_encrypt(a,a) is null from (values('a'),(NULL),('b')) x;
--echo #
--echo # End of 11.2 tests
--echo #
--echo #
--echo # MDEV-30879 Add conversion to based 62 for CONV function
--echo #
SELECT CONV('1z', 62, 10);
SELECT CONV('1Z', 62, 10);
SELECT CONV('-1Z', 62, 10);
SELECT CONV('-1Z', -62, 10);
SELECT CONV('-1Z', 62, -10);
SELECT CONV('-1Z', -62, -10);
# Check limits
SELECT CONV('AzL8n0Y58m7', 62, 10);
SELECT CONV('LygHa16AHYE', 62, 10);
SELECT CONV('LygHa16AHYF', 62, 10);
# Overflow doesn't appear to warn, but does overflow
SELECT CONV('LygHa16AHZ0', 62, 10);
SELECT CONV('-AzL8n0Y58m7', -62, -10);
SELECT CONV('-AzL8n0Y58m8', -62, -10);
SELECT CONV('-AzL8n0Y58m9', -62, -10);
SELECT CONV('-LygHa16AHZ0', -62, -10);
# Should NULL
SELECT CONV('LygHa16AHYF', 63, 10);
SELECT CONV(18446744073709551615, 10, 63);
# Test 10 -> 62
SELECT CONV(18446744073709551615, 10, 62);
SELECT CONV(-9223372036854775808, -10, -62);
--echo #
--echo # End of 11.4 tests
--echo #