toJson

toJson(X)

X can be any data type.

Convert a DolphinDB object to JSON format. The result includes 5 key-value pairs: name, form, type, size and value.

For different data forms, the maximum length of the data to be converted differs:

x=1 2 3
y=toJson(x)
y;
// output
{"name":"x","form":"vector","type":"int","size":"3","value":[1,2,3]}

t=table(1 2 3 as id, 10 20 30 as val)
toJson(t);
// output
{"name":"t","form":"table","size":"3","value":[{"name":"id","form":"vector","type":"int","size":"3","value":[1,2,3]},{"name":"val","form":"vector","type":"int","size":"3","value":[10,20,30]}]}

// The length of set exceeds 30000, and toJson can only convert the first 30000 elements
x=set(1..400001)
y=toJson(x)
size(fromJson(y))
// output
300000

Related function: fromJson