Is it possible to return everything? when $words=""
$result = $cl->Query( $words, 'test1' );
it returns nothing, is there a way for it to return everything?
Try searching for *.
What matching mode do you use?
For full scan, you can use SPH_MATCH_FULLSCAN search mode.
Also, SPH_MATCH_EXTENDED2 support fullscan, simply put empty string into Query function as you did.
Related
I'm trying to write a prometheus query in grafana that will select visits_total{route!~"/api/docs/*"}
What I'm trying to say is that it should select all the instances where the route doesn't match /api/docs/* (regex) but this isn't working. It's actually just selecting all the instances. I tried to force it to select others by doing this:
visits_total{route=~"/api/order/*"} but it doesn't return anything. I found these operators in the querying basics page of prometheus. What am I doing wrong here?
May be because you have / in the regex. Try with something like visits_total{route=~".*order.*"} and see if the result is generated or not.
Try this also,
visits_total{route!~"\/api\/docs\/\*"}
If you want to exclude all the things that has the word docs you can use below,
visits_total{route!~".*docs.*"}
The main problem with your original query is that /api/docs/* will only match things like /api/docs and /api/docs//////; i.e. the * in your query will match 0 or more / characters.
I think what you meant to use was /api/docs/.*.
When checking if a query was successful, what is better?
This
$query= "SELECT * FROM `table`";
$mysqliResult = $mysqli->query($query);
if(mysqli_num_rows($mysqliResult)) {
}
Or this:
$query= "SELECT * FROM `table`";
$mysqliResult= $mysqli->query($query);
if(get_resource_type($mysqliResult) === 'mysqli result') {
}
Neither.
Firs one is not an option at all. It'just inapplicable, as empty result is a legitimate result as well - the query was a success anyway.
Besides, in case of an unsuccessful query, this very code will throw an error itself!
The second one could be used for the purpose, but this approach is outdated and extremely inconvenient.
Instead, set mysqli in exception throwing mode, and you will need no code to test for success at all!
First option is better because your are checking only query is success or not but second option we use that when we need to check values and data type are equal ,so first is better
I am trying to sort using Sphinx (PHP) to show in order of price but when I do it will show £10 before £1.75 so I need to use ABS like in mySQL.
I have tried this:
$s->SetSortMode (SPH_SORT_EXPR, "ABS(display_price) ASC" );
It doesnt seem to work though.
Can anybody help?
Check, if display_price attribute treated as a decimal in search index
Probably you have
sql_attr_string = display_price
instead of
sql_attr_float = display_price
or
sql_attr_bigint = display_price
updated
SPH_SORT_EXPR is ALWAYS descending order. the ASC/DESC are for use with EXTENDED mode only.
To 'invert' it to become acsending, can build it into the expression.
$s->SetSortMode (SPH_SORT_EXPR, "1000000-CEIL(ABS(display_price*100.0))" );
It seems to me that there simply has to be a better way of doing this, but i still haven't found one. And i'm sure i'm not the only one who could use a way to do this: Run an SQL query that only produces one field in one row, then assign that field to a scalar. (In my case, if the query results in more than one field/row, then i have bigger things to worry about than the script breaking).
For example, to get the timestamp from the SQL server, one could use:
my $timestamp;
my $cmd = $dbh->prepare('SELECT cast(now() AS timestamp);') or die $!;
$cmd->execute();
while (my #asd = $cmd->fetchrow_array) { $timestamp = $asd[0] }
Dirty, but it works. But using 4 lines seem a bit much for a simple assignment, especially considering how well perl and postgresql can communicate with eachother via DBI. Sure, i could write a subroutine for it, but isn't there something native that allows me to fetch data as easily as i submit data with $dbh->do() ?
And yes, i did try google.
Usually I write:
$value = $dbh->selectall_arrayref($sql)->[0]->[0];
There's always selectrow_array:
selectrow_array
#row_ary = $dbh->selectrow_array($statement);
#row_ary = $dbh->selectrow_array($statement, \%attr);
#row_ary = $dbh->selectrow_array($statement, \%attr, #bind_values);
This utility method combines prepare, execute and fetchrow_array into a single call.
So something like this:
my $timestamp = $dbh->selectrow_array('select cast(now() as timestamp)');
There's also selectrow_arrayref and selectrow_hashref for similar situations.
From perldoc DBI:
"selectrow_arrayref"
$ary_ref = $dbh->selectrow_arrayref($statement);
$ary_ref = $dbh->selectrow_arrayref($statement, \%attr);
$ary_ref = $dbh->selectrow_arrayref($statement, \%attr, #bind_values);
This utility method combines "prepare", "execute" and
"fetchrow_arrayref" into a single call. It returns the first row of
data from the statement. The $statement parameter can be a previously
prepared statement handle, in which case the "prepare" is skipped.
If any method fails, and "RaiseError" is not set, "selectrow_array"
will return undef.
That will get you most of the way. You still need to do some error checking, but you would be doing that anyway.
Wouldn't fetchrow_array actually only return a scalar as you're only asking for one column?
Hi I am looking for a way to get the whole index if my query is nothing.
My lucene is a picture of my database without some unwanted content, like expired annonces...
So I would like to use only lucene to get annonces, and for that I need a way to get the whole index.
Any ideas?
thanks!
This is not the answer but something wich works for me:
Using an indexKey like is_indexed, always true.
I am adding "is_indexed:1" to my query and it works...
If you have something else, let me know!
I tend to use a field which is named after the index such as:
$oDoc->addField(
Zend_Search_Lucene_Field::keyword(
'index',
'availability'
)
);
Then the term query will return all fields. It's not pretty but it works fine.