using this fetch (taken from a template ezdemo):

fetch( 'content', 'keyword', hash( 'alphabet', rawurldecode( $view_parameters.tag ),
'classid', 'blog_post',
'parent_node_id', $node.node_id,
'offset', $view_parameters.offset,
'sort_by', array( 'attribute', false(), 'blog_post/publication_date' ),
'limit', $page_limit ) )

produce this query
SELECT DISTINCT ezcontentobject_tree.node_id, ezkeyword.keyword, a0.sort_key_int
FROM ezkeyword
INNER JOIN ezkeyword_attribute_link ON (ezkeyword_attribute_link.keyword_id = ezkeyword.id)
INNER JOIN ezcontentobject_attribute ON (ezcontentobject_attribute.id = ezkeyword_attribute_link.objectattribute_id)
INNER JOIN ezcontentobject ON (ezcontentobject_attribute.version = ezcontentobject.current_version AND ezcontentobject_attribute.contentobject_id = ezcontentobject.id)
INNER JOIN ezcontentobject_tree ON (ezcontentobject_tree.contentobject_id = ezcontentobject.id)
INNER JOIN ezcontentclass ON (ezcontentclass.id = ezcontentobject.contentclass_id)
INNER JOIN ezcontentobject_attribute a0 ON (
a0.contentobject_id = ezcontentobject.id AND
a0.contentclassattribute_id = 198 AND
a0.version = ezcontentobject_name.content_version AND
( a0.language_id & ezcontentobject.language_mask > 0 AND
( ( ezcontentobject.language_mask - ( ezcontentobject.language_mask & a0.language_id ) ) & 1 )
+ ( ( ( ezcontentobject.language_mask - ( ezcontentobject.language_mask & a0.language_id ) ) & 2 ) )
<
( a0.language_id & 1 )
+ ( ( a0.language_id & 2 ) )
)
)
INNER JOIN ezcontentobject_name ON (ezcontentobject_name.contentobject_id = ezcontentobject.id)

WHERE
ezkeyword.keyword LIKE '%mykeyword'
AND ezcontentobject_tree.is_invisible = 0
AND ((ezcontentobject.section_id in (1)) OR (ezcontentobject.contentclass_id in (25, 33) AND ezcontentobject.section_id in (3)))

AND ezcontentobject_tree.parent_node_id = '70'
AND ezcontentclass.version = 0
AND ezcontentobject.status = 1
AND ezcontentobject_tree.main_node_id = ezcontentobject_tree.node_id
ORDER BY a0.sort_key_int DESC
LIMIT 0, 10

which give the following error when executed on my system (mysql-5.5):
ERROR 1064 (42000): You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'Query error (1054): Unknown column 'ezcontentobject_name.content_version' in 'on' at line 1

I think there is a problem in kernel/content/ezcontentfunctioncollection.php ligne 950 when the query is built. the INNER JOIN clause which joins the table ezcontentobject_name should be declared before the other INNER JOIN clauses related to the attributes filter.

with the attached patch I've got the correct behavior.