create-index
["create-index", <collection>, <index-spec>]
=> <0|1>
["create-index", "people", "name"]
=> 1
["create-index", "people", ["name", ["age", "desc"]]]
=> 1
Ensures that the index described by index-spec exists on the given collection. Returns 1 if such an index is created or 0 if it already exists.
index-spec may indicate an index on 1 attribute or on multiple attributes.
<attribute>
[<attribute>|[<attribute>, <"asc"|"desc">]+]
If an order is not given for an attribute in a multi-attribute index, it is assumed to be ascending.
The following are examples of index-specs:
"name"
["name", ["age", "desc"]]
[["name", "desc"] ["age", "asc"]]