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Merge tulin@bk-internal.mysql.com:/home/bk/mysql-4.1

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into poseidon.ndb.mysql.com:/home/tomas/mysql-4.1-ndb
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unknown
2004-10-20 17:31:59 +00:00
parent 10a6020ee0 44db341fdb
commit ffd77c4679
3 changed files with 54 additions and 2 deletions
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19
mysql-test/r/ndb_basic.result
View File

@ -395,3 +395,22 @@ b attr1
9413 9412
drop table test.t1, t2;
drop database mysqltest;
use test;
create table t1 (a int primary key, b char(0));
insert into t1 values (1,"");
insert into t1 values (2,NULL);
select * from t1 order by a;
a b
1
2 NULL
select * from t1 order by b;
a b
2 NULL
1
select * from t1 where b IS NULL;
a b
2 NULL
select * from t1 where b IS NOT NULL;
a b
1
drop table t1;

13
mysql-test/t/ndb_basic.test
View File

@ -358,3 +358,16 @@ select b,test.t1.attr1 from test.t1, t2 where test.t1.pk1 < a;
drop table test.t1, t2;
drop database mysqltest;
#
# test support of char(0)
#
use test;
create table t1 (a int primary key, b char(0));
insert into t1 values (1,"");
insert into t1 values (2,NULL);
select * from t1 order by a;
select * from t1 order by b;
select * from t1 where b IS NULL;
select * from t1 where b IS NOT NULL;
drop table t1;

24
sql/ha_ndbcluster.cc
View File

@ -89,6 +89,12 @@ static int ndb_get_table_statistics(Ndb*, const char *,
Uint64* rows, Uint64* commits);
/*
Dummy buffer to read zero pack_length fields
which are mapped to 1 char
*/
static byte dummy_buf[1];
/*
Error handling functions
*/
@ -443,6 +449,13 @@ int ha_ndbcluster::set_ndb_value(NdbOperation *ndb_op, Field *field,
if (ndb_supported_type(field->type()))
{
// ndb currently does not support size 0
const byte *empty_field= "";
if (pack_len == 0)
{
pack_len= 1;
field_ptr= empty_field;
}
if (! (field->flags & BLOB_FLAG))
{
if (field->is_null())
@ -586,7 +599,11 @@ int ha_ndbcluster::get_ndb_value(NdbOperation *ndb_op, Field *field,
DBUG_ASSERT(field->ptr != NULL);
if (! (field->flags & BLOB_FLAG))
{
byte *field_buf= buf + (field->ptr - table->record[0]);
byte *field_buf;
if (field->pack_length() != 0)
field_buf= buf + (field->ptr - table->record[0]);
else
field_buf= dummy_buf;
m_value[fieldnr].rec= ndb_op->getValue(fieldnr,
field_buf);
DBUG_RETURN(m_value[fieldnr].rec == NULL);
@ -3164,7 +3181,10 @@ static int create_ndb_column(NDBCOL &col,
col.setType(NDBCOL::Char);
col.setCharset(cs);
}
col.setLength(field->pack_length());
if (field->pack_length() == 0)
col.setLength(1); // currently ndb does not support size 0
else
col.setLength(field->pack_length());
break;
case MYSQL_TYPE_VAR_STRING:
if (field->flags & BINARY_FLAG)