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MXS-1216: Correct CHAR(n) handling

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The field length was wrongly compared to less than 255 for two byte field
lengths. In addition to that, the metadata was interpreted in the wrong
way.
This commit is contained in:
Markus Mäkelä 2017-05-12 11:25:48 +03:00
parent c988735a03
commit 926930e241
1 changed files with 13 additions and 5 deletions
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18
server/modules/routing/avro/avro_rbr.c
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@ -572,15 +572,23 @@ uint8_t* process_row_event_data(TABLE_MAP *map, TABLE_CREATE *create, avro_value
* one or two bytes for string length.
*/
uint8_t bytes = *ptr++;
int len = metadata[metadata_offset] +
(((metadata[metadata_offset + 1] >> 4) & 0x3) ^ 0x3);
uint16_t meta = metadata[metadata_offset + 1] + (metadata[metadata_offset] << 8);
int bytes = 0;
uint16_t extra_length = (((meta >> 4) & 0x300) ^ 0x300);
uint16_t field_length = (meta & 0xff) + extra_length;
if (len <= 255)
if (field_length > 255)
{
bytes += *ptr++ << 8;
bytes = ptr[0] + (ptr[1] << 8);
ptr += 2;
}
else
{
bytes = *ptr++;
}
MXS_INFO("[%ld] CHAR: field: %d bytes, data: %d bytes", i, field_length, bytes);
ss_dassert(bytes || *ptr == '\0');
char str[bytes + 1];
memcpy(str, ptr, bytes);
str[bytes] = '\0';