Introduction

agtool query is a command-line query tool. It dispatches queries to the AllegroGraph server and receives the results. The results are the same as sending queries using, say, AGWebView (see WebView).

The agtool program is the general program for AllegroGraph command-line operations. (In earlier releases, there was a separate agquery program.)

Usage

agtool query [OPTIONS] REPO-SPEC [QUERY-FILE]*

The arguments are:

REPO-SPEC
The repository specification identifying the repository to be queried. REPO-SPECs can not only identify specific repositories but also SPARQL endpoints (e.g. http://dbpedia.org/sparql) and more complex repository combinations such as federated repos and repos with reasoning.
QUERY-FILE
Zero or more files or directories containing SPARQL queries. If a directory is specified, all of the files in it will be processed. Use - to read from standard input.

Options

There are many options. For convenience, we break them into several categories:

Triple-store options

-o LEVEL, --optimize LEVEL
Optimize database indices (default 0) as soon as the store is opened. Possible values are 0, 1, and 2. See optimize-indices][].
--with-indices INDICES

Specify the indices of the triple-store. The parameter should be a list of index names separated by spaces. When multiple names separated by spaces are specified, the spaces must be escaped or the whole specification can be quoted, like "spogi posgi ospgi".

If not specified, newly created triple-stores will use the standard set of indices and existing triple-stores will retain their current indices. If specified, the current indices are dropped and the newly specified ones are used.

Query options

-i ITERATIONS, --iterations ITERATIONS
Run entire batch (default 1).
--option NAME=VALUE
Specify options, which will be used when running the queries, just like normal SPARQL prefixes. See SPARQL query options.
-r REPETITIONS, --repetitions REPETITIONS
Run each query this many times per iteration (default 1).
--results-format FORMAT
output format used by the query engine (default table). Choices are: 
arrays          arrays  
strings         strings  
lists           lists  
sparql-xml      sparql-xml  
count           count  
count-cursor    determine the count using a cursor  
table           table
--title TITLE
Value to use for the report title.
--language LANGUAGE
The query language. (default: sparql). Choices are sparql (meaning SPARQL) and select (meaning Prolog select).
--plan
Display a representation of the query plan and then stop.

Reporting options

--baseline FILENAME
Log file to use as a reporting baseline.
--measure MEASURE
What to measure (e.g., time, space). Choices include: 
Choice     What it measures  
------     ----------------  
time       time  
user       user time  
system     system time  
space      cons cells  
minor      minor page faults  
major      major page faults
--report-format FORMAT
Output format for generated reports (default text). Choices are 
Choice  Format  
------  ------  
text    text  
csv     comma-separated value

Other options

--answer-file ANSWER-FILE
provide answers for the queries you are running, in order to verify results.
--log FILENAME
Save results to log.
--quiet
Reduce output (default no).
--spogi YES-OR-NO
Turn the SPOGI cache on or off (default yes).
-v, --verbose
Include more output.
--warmup
Calls warmup-triple-store before querying if specified.

Connection options (deprecated)

All the information that can be specified by these options can be specified in the REPO-SPEC argument. Use of these options is deprecated but they are still supported for backward compatibility. REPO-SPECs are described in the Repsoitory Specification document.

-p PORT, --port PORT
Server port (default 10035).
-c CATALOG, --catalog CATALOG
CATALOG name on server; use "" or leave unspecified for the root catalog (the default is the root catalog). Note: the root catalog has no name. Specifying "root" will not be interpreted as the root catalog.
-u USERNAME, --user USERNAME
Username for the server; use with --password.
--password PASSWORD
The password for USERNAME.
--server SERVER
Server where the triple-store lives (if unspecified, this argument is ignored). This allows you to query a remote triple-store.

Examples:

A typical call using the lubm50 database and associated queries. 

agtool query --catalog stores lubm-50 /queries/lubm-50/*.rq

Another example would be the following which uses a book database. Note we get the query from standard input. 

agtool query --results-format count sp2b-1e4 - <<EOF  
PREFIX rdf:     <http://www.w3.org/1999/02/22-rdf-syntax-ns#>  
PREFIX rdfs:    <http://www.w3.org/2000/01/rdf-schema#>  
PREFIX swrc:    <http://swrc.ontoware.org/ontology#>  
PREFIX foaf:    <http://xmlns.com/foaf/0.1/>  
PREFIX bench:   <http://localhost/vocabulary/bench/>  
PREFIX dc:      <http://purl.org/dc/elements/1.1/>  
PREFIX dcterms: <http://purl.org/dc/terms/>  
 
SELECT ?inproc ?author ?booktitle ?title  
       ?proc ?ee ?page ?url ?yr ?abstract  
WHERE {  
  ?inproc rdf:type bench:Inproceedings .  
  ?inproc dc:creator ?author .  
  ?inproc bench:booktitle ?booktitle .  
  ?inproc dc:title ?title .  
  ?inproc dcterms:partOf ?proc .  
  ?inproc rdfs:seeAlso ?ee .  
  ?inproc swrc:pages ?page .  
  ?inproc foaf:homepage ?url .  
  ?inproc dcterms:issued ?yr  
  OPTIONAL {  
    ?inproc bench:abstract ?abstract  
  }  
}  
ORDER BY ?yr  
EOF

It returns: 

   147   0.364