"Global" variables shared among queries

[jimwu]

If I understand it correctly, global variables as defined in TigherGraph only have the scope within the same query. Is there a way to create global variables with scope of all queries. For example, below is the psudo code what I am trying to accomplish:

bool config_loaded = False;
create query load_config() {
    ...load configuration
    config_loaded = True;
}

create query run_test() {
    if config_loaded == False then
        load_config() 
    end;

    ... run my tests

}

[Mingxi_Wu]

Method 1: put the shared state in a physical file, and each query load that file first.

• Use an external program to write to a file the state you want to share across the queries.
• Use the LOADACCUM statement in each query to load the file.
  https://docs.tigergraph.com/dev/gsql-ref/querying/declaration-and-assignment-statements#loadaccum-statement

Method 2: put the shared state in a special vertex, and each query check the vertex first.

• Use GSQL DDL create a special vertex type, let’s say it’s named A.
• Use a GSQL DML query to insert a vertex (which encodes your shared state) to the type A.
  https://docs.tigergraph.com/dev/gsql-ref/querying/data-modification-statements
• In your test query, check the value of the instance of A. E.g.

create query run_test() {

OrAccum @@config_loaded= false;

S= SELECT tgt
      FROM A:tgt
      WHERE tgt.id == "config1"
      ACCUM @@config_loaded = tgt.flag;

IF @@config_loaded THEN DO
 //your stuff
END;

}