Sphinx (via SphinxQL) match without asterisk, but not with asterisk - search-engine

Question

I have an index in Sphinx, one of the words in this index is an article number. In this case 04.007.00964.
When I query my index like this:
SELECT * FROM myIndex WHERE MATCH('04.007.00964')
I have one result, this is as expected.
However, when I query it like this:
SELECT * FROM myIndex WHERE MATCH('*04.007.00964*')
I have zero results.
My index configuration is:
index myIndex
{
source = myIndex
path = D:\Tools\Sphinx\data\myIndex
morphology = none
min_word_len = 3
min_prefix_len = 0
min_infix_len = 2
enable_star = 1
}
I'm using v2.0.4-release
What am I doing wrong, or what dont I understand?

Answer 1

Because of
min_word_len = 3
The first query will be effectivly:
SELECT * FROM myIndex WHERE MATCH('007 00964')
So short words are ignored. (indexing and querying)
Edit to add: And "." is not in the default charset_table, which is why its used as a seperator.
However "*04" is not stripped, because it 3 chars,
but then there is nothing to match, because "04" will not be in the index (its shorter than the min_word_len)
... so its a unfortunate combination of word and infix lengths. Can easily fix it by making min_word_len = 2
Edit to add: or adding '.' to charset tables, so that its no longer used to separate words, therefore the whole article number is used - and is longer than both min_word_len and min_infix_len)