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Re: Issue with NULL data in column
Posted by: Chuck Bell
Date: October 25, 2016 12:00PM

Ok, I found an issue in the read_string() method. The following fixes the issue.

char *MySQL_Cursor::read_string(int *offset) {
char *str;
int len_bytes = conn->get_lcb_len(conn->buffer[*offset]);
int len = conn->read_int(*offset, len_bytes);
if (len == 251) {
// This is a null field.
str = (char *)malloc(5);
strncpy(str, "NULL", 4);
str[4] = 0x00;
*offset += len_bytes;
} else {
str = (char *)malloc(len+1);
strncpy(str, (char *)&conn->buffer[*offset+len_bytes], len);
str[len] = 0x00;
*offset += len_bytes+len;
}
return str;
}

Replace the existing method with this code and you should be able to read NULL columns as "NULL".

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