arangosh> db.test.ensureIndex({ type: "hash", fields: [ "a[*]" ] });
{
"deduplicate" : true,
"fields" : [
"a[*]"
],
"id" : "test/74491",
"isNewlyCreated" : true,
"name" : "idx_1646382081940389888",
"selectivityEstimate" : 1,
"sparse" : false,
"type" : "hash",
"unique" : false,
"code" : 201
}
arangosh> db.test.save({ a : [ 1, 2 ] });
{
"_id" : "test/74495",
"_key" : "74495",
"_rev" : "_ZXF6dUm--_"
}
arangosh> db.test.save({ a : [ 1, 3 ] });
{
"_id" : "test/74497",
"_key" : "74497",
"_rev" : "_ZXF6dUq---"
}
arangosh> db.test.save({ a : null });
{
"_id" : "test/74499",
"_key" : "74499",
"_rev" : "_ZXF6dUq--A"
}