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Prevent a possible segfault when the sqlite3_value_numeric_type() interface is

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misused to try to determine the numeric type of the NULL value returned
from sqlite3_column_value() with an invalid column number.

FossilOrigin-Name: 501b743bcb60cda0acf63bcf8a4abbf00797b347
This commit is contained in:
drh
2010-11-18 12:31:24 +00:00
parent 79d086dffc
commit e5a8a1df0d
3 changed files with 14 additions and 14 deletions
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8
src/vdbe.c
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@@ -311,13 +311,13 @@ static void applyAffinity(
** into a numeric representation. Use either INTEGER or REAL whichever
** is appropriate. But only do the conversion if it is possible without
** loss of information and return the revised type of the argument.
**
** This is an EXPERIMENTAL api and is subject to change or removal.
*/
int sqlite3_value_numeric_type(sqlite3_value *pVal){
Mem *pMem = (Mem*)pVal;
applyNumericAffinity(pMem);
sqlite3VdbeMemStoreType(pMem);
if( pMem->type==SQLITE_TEXT ){
applyNumericAffinity(pMem);
sqlite3VdbeMemStoreType(pMem);
}
return pMem->type;
}