objs

objs([shared=false])

Obtain the information on the variables in memory. Return a table with the following columns:

• name: variable name

• type: data type

• form: data form

• rows:

  • If the data form is vector/dictionary/set, return the number of all elements (including NULL values);

  • If the data form is matrix/table, return the number of rows.

• columns:

  • If the data form is vector/dictionary/set, return 1;

  • If the data form is matrix/table, return the number of columns.

• bytes: the memory (in bytes) used by the variable

• shared: whether it is a shared variable

• extra: the logical path to the DFS table, in the format of "dfs://dbName/tableName"

Please note that the function does not return the function definitions. You can use defs to check function definitions, or memSize for the memory usage.

//create a DFS database
if(existsDatabase("dfs://listdb")){
        dropDatabase("dfs://listdb")
}
n=1000000
ticker = rand(`MSFT`GOOG`FB`ORCL`IBM,n);
ticker[0..5]
x=rand(1.0, n)
t=table(ticker, x)
db=database(directory="dfs://listdb", partitionType=HASH, partitionScheme=[STRING, 5])
pt=db.createPartitionedTable(t, `pt, `ticker)
pt.append!(t)

// shared in-memory table
time = take(2021.08.20 00:00:00..2021.08.30 00:00:00, 40);
id = 0..39;
value = rand(100, 40);
tmp = table(time, id, value);
share tmp as st

// create set
s = set([1,2,3,4,5])

// create dict
x=1 2 3
y=4.5 7.8 4.3
z=dict(x,y);

// create matrix
m = matrix(1 2 3, 4 5 6)

// create pair
p = 1:2

objs(true)