With orientDB you can insert / update directly using JSON as the input using the 'CONTENT' keyword which is great. ODB takes care of the mappings.
Id like to be able to return JSON as well from SELECT queries - is this possible?
Kurt
You can use .toJSON() method.
Syntax: <value>.toJSON([<format>])
Example:
create class Test extends V
insert into Test content {"attr1": "value 1", "attr2": "value 2"}
select #this.toJson('rid,version,fetchPlan:in_*:-2 out_*:-2') from Test
Ref.: SQL Methods - .toJSON()
Related
There is a simple database entity:
case class Foo(id: Option[UUID], keywords: Seq[String])
I want to implement a search function which returns all entities of type Foo which have at least one keyword that contains the search string.
I'm using Slick and tried this:
def searchKeywords(txt: String): Future[Seq[Foo]] = {
val action = Foos.filter(p => p.keywords.any like s"%$txt%").result
db.run(action)
}
This piece of code compiles, but when executing, I get this SQL error:
PSQLException: ERROR: syntax error at or near "any"
The generated sql statement looks like:
select "id", "title", "tagline", "logo", "short_desc", "keywords", "initial_condition", "work_process", "end_result", "ts", "lm", "v" from "projects" where any("keywords") like '%foo%'
And it does not work with postgresql. (I'm using v12)
Schema for the table looks like this:
CREATE TABLE foos
(
id UUID NOT NULL PRIMARY KEY,
keywords varchar[] NOT NULL
);
How can I achieve to search in a list of strings using the like operator?
From a pure SQL point of view, you need a derived table to achieve that. I hope some expert corrects me if I'm wrong but you can't use SQL operator like on a array.
Supposing your table construction is :
CREATE TABLE foos
(
id UUID NOT NULL PRIMARY KEY,
keywords varchar[] NOT NULL
);
Then an SQL way of retrieving the results would be :
select * from (
select id, unnest(keywords) as keyw from foos
) myTable where keyw like '%foo%'
Otherwise, the syntax you're using for the like operator seems correct.
myProperty like s"%$myVariable"
Database used: postgreSQL
I have the following code:
#Query(value="select id, meta " + "from temp " +
"where meta #> \'{\"animal\": \"donkey\" }\'", nativeQuery = true)
List<classDemo> findByMeta();
The meta column has data in the following format:
{
"meta": { "animal":"dog", "type":"dirty"}
}
I would like to provide the value of animal as a parameter (e.g. donkey should be a parameter), so that I can extract all the records of the entered value during a get request. What can I do to the above code so that I can enter a parameter rather than a direct value?
Above code is jsonb format, present in meta column
If the meta column is json or jsonb, then you can use this for your query:
select id, meta
from temp
where meta->'meta'->>'animal' = 'donkey'
If meta is data type text, then this will work so long as all rows in the table have valid json stored in meta:
select id, meta
from temp
where (meta::jsonb)->'meta'->>'animal' = 'donkey'
It has been a long while since I have worked in Java and even longer when it comes to Spring, but you should be able to placeholder 'donkey' with a question mark and then setString(1, "donkey") on it.
I am trying to access a table in my Secondary DB whose name I am obtaining from my Primary DB. My difficulty is to pass the "DB-Name" as a parameter into my secondary query, (BTW I am using MyBatis annotation based Mappers).
This is my Mapper
#SelectProvider(type = DealerQueryBuilder.class, method = "retrieveDealerListQuery")
#Results({
#Result(property="dealerID", column="frm_dealer_master_id"),
#Result(property="dealerTypeID", column="frm_dealer_type_id", one=#One(select="retrieveDealerTypeDAO")),
#Result(property="dealerName", column="frm_dealer_name")
})
public List<Dealer> retrieveDealerListDAO(#Param("firmDBName") String firmDBName);
#Select("SELECT * from ${firmDBName}.frm_dealer_type where frm_dealer_type_id=#{frm_dealer_type_id}")
#Results({
#Result(property="dealerTypeID", column="frm_dealer_type_id"),
#Result(property="dealerType", column="frm_dealer_type")
})
public DealerType retrieveDealerTypeDAO(#Param("firmDBName") String firmDBName, #Param("frm_dealer_type_id") int frm_dealer_type_id);
The firmDBName I have is obtained from my "Primary DB".
If I omit ${firmDBName} in my second query, the query is trying to access my Primary Database and throws out table "PrimaryDB.frm_dealer_type" not found. So it is basically trying to search for a table named "frm_dealer_type" in my Primary DB.
If I try to re-write the #Result like
#Result(property="dealerTypeID", column="firmDBName=firmDBName, frm_dealer_type_id=frm_dealer_type_id", one=#One(select="retrieveDealerTypeDAO")),
It throws an error that Column"firmDBName" does not exist.
Changing ${firmDBName} to #{firmDBName} also did not help.
I did refer to this blog - here
I want a solution to pass my parameter firmDBName from my primary query into secondary query.
The limitation here is that your column must be returned by the first #SELECT.
If you look at the test case here you will see that parent_xxx values returned by the first Select.
Your DealerQueryBuilder must select firmDBName as a return value and your column must map the name of the return column to that.
Your column definition is always wrong, it should be:
{frm_dealer_type_id=frm_dealer_type_id,firmDBName=firmDBName} or whatever it was returned as from your first select.
Again you can refer to the test case I have above as well as the documentation here http://www.mybatis.org/mybatis-3/sqlmap-xml.html#Nested_Select_for_Association
Any way to get record count for each graph class (V, E and their subclasses)?
I tried to build query in SQL format for current case:
SELECT #class, count(*) FROM V GROUP BY #class
SELECT #class, count(*) FROM E GROUP BY #class
But using count() + GROUP BY is extrimply slow combination.
While console command list classes works fast and return values for count of records in each class (field RECORDS), how to extract this counts via SQL query (or via OrientJS API)?
The main idea is find a way to:
Get list of all classes if database
Get count of records that stored in each class
Technical details
In OrientDB functions you have access to orient variable that have .getDatabase() method. And this method return JAVA ODatabaseDocumentTx class instance. This class provides the method .countClass(className) that returns the number of the records of the class className (method documentation) and it works realy fast.
Solution
Create function in OrientDB Studio with name "getClassCounts", language "javascript", idempotent: true:
var db = orient.getDatabase();
var classesRawInfo = db.getMetadata().getImmutableSchemaSnapshot().getClasses().toArray();
var classesList = {};
var i = classesRawInfo.length;
while(--i) {
var className = classesRawInfo[i].name;
classesList[className] = db.countClass(className);
}
return classesList;
Executing:
via SQL: SELECT getClassCounts()
I think it's not possible, also because it wouldn't so fast as in the console
I am trying to insert a vertex with orientjs(previously oriento) query builder. My class has a link type property pointing to another class.
I know I can get it to work with a raw query string but I would love to use the query builder.
Here is what I've tried so far :
db.insert()
.into('VertexClassName')
.set({"prop":"value", "linkProperty":"33:1289287"})
db.insert()
.into('VertexClassName')
.set({"prop":"value", "linkProperty":"#33:1289287"})
I get the following error :
Error on saving record in cluster #13
Am I setting properties in the right way ?
Could the error be related to somtehing else ?
I have sucessfully ran an insert query in the cluster #13 with a raw query string in the studio...
According to the official documentation it seems that the problem might be at the end of your statement
db.insert().into('VertexClassName')
.set({"prop":"value", "linkProperty":"33:1289287"}).one()
.then(function (data) {
// callback
});
Check if your code works adding one() to the pipe line
EDITED: I found this method in orientjs.
db.create('VERTEX', 'V')
.set({
key: 'value',
foo: 'bar'
})
.one()
.then(function (vertex) {
console.log('created vertex', vertex);
});
When using Tinkerpop API they recommend using createVertex instead of insert, because createVertex is intended for graphs and insert for Documents... Could you try with the create() method instead?
I am using SQL and it worked.
sql = "INSERT INTO Station set linked = (select from LinkedClass where LinkedProb = 'value'), prop = 'value'"
OrientVertex vertex = new OrientVertex();
vertex = graph.command(new OCommandSQL(sql)).execute();
I don't think that's possible unless you've added a proper field with the right type 'Link' in your schema. (which I rarely do).
Now instead of having the right 'link' type inserted you can do the opposite, store is as a String, and leverage the query functions to use it correctly:
db.insert().into('table').set({prop: '#15:14'}).one();
And it will be converted as String (which is a bit sad) but then you can use that in your queries:
SELECT eval(prop) FROM table;
And it will be 'eval'-ed to a Node RecordID that you can directly use and call functions like expand() on.
For example:
SELECT name FROM (SELECT expand(eval(prop)) FROM table);
Will eval the node stored in the insert(), grab the node, expand it and collect its name property.