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MDEV-38792 TO_DATE: Inconsistent treatment of separators #4809

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MDEV-38792 TO_DATE: Inconsistent treatment of separators #4809

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10 changes: 10 additions & 0 deletions mysql-test/main/mdev-38792.result
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Original file line number Diff line number Diff line change
@@ -0,0 +1,10 @@
SET sql_mode = 'ORACLE';
SELECT TO_DATE('2002 AD', 'YYYY - AD') FROM DUAL;
TO_DATE('2002 AD', 'YYYY - AD')
2002-03-15 00:00:00
SELECT TO_DATE('2002 - AD', 'YYYY AD') FROM DUAL;
TO_DATE('2002 - AD', 'YYYY AD')
2002-03-15 00:00:00
SELECT TO_DATE('2002 - AD', 'YYYY-AD') FROM DUAL;
TO_DATE('2002 - AD', 'YYYY-AD')
2002-03-15 00:00:00
11 changes: 11 additions & 0 deletions mysql-test/main/mdev-38792.test
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# TO_DATE: Inconsistent treatment of different separators in the date and format strings
SET sql_mode = 'ORACLE';

# case 1:
SELECT TO_DATE('2002 AD', 'YYYY - AD') FROM DUAL;

# case 2: The fixed bug:
SELECT TO_DATE('2002 - AD', 'YYYY AD') FROM DUAL;

# case 3:
SELECT TO_DATE('2002 - AD', 'YYYY-AD') FROM DUAL;
15 changes: 15 additions & 0 deletions sql/item_timefunc.cc
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Expand Up @@ -721,6 +721,21 @@ extract_oracle_date_time(THD *thd, uint16 *format_ptr,
continue;
}

/*
MDEV-38792: TO_DATE: Inconsistent treatment of different separators in the date and format strings.
Skip punctuation and spaces in the input string before matching the next
format token, but avoid skipping a '-' sign if it's followed by a digit
(as it might be part of a negative year in SYYYY).
*/
while (val < val_end && !my_isalnum(val_cs, *val))
{
if (*val == '-' && (val + 1 < val_end) && my_isdigit(val_cs, *(val + 1)))
{
break;
}
val++;
}

error= 0;
if (!(val_len= (uint) (val_end - val)))
goto error;
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