$setIsSuperset

Definition

Tests whether the first set contains the second.

Expression operator · Sets · Studio Visual: not exposed. Studio validates the complete expression separately.

Syntax

{ "$setIsSuperset": [ <array>, <other> ] }

Replace angle-bracket placeholders with expressions or values.

Optional parameters may be omitted.

Parameters

Parameter	Required	Description
array	Yes	Expression supplying the source array.
other	Yes	Expression supplying the other array for the set operation.

Arguments are positional: keep the order shown. The authoring signature accepts 2–2 arguments.

Behavior

The following observations use the example expression below. Each row substitutes one argument while retaining the other example arguments. A missing field differs from an explicit null; the result shown is what Core actually returned.

For the array argument:

Input case	Supplied value	Result
null	null	Error — $setIsSuperset expects array operands
missing	Field absent	Error — $setIsSuperset expects array operands
decimal	2.5	Error — $setIsSuperset expects array operands
numeric string	"12"	Error — $setIsSuperset expects array operands
text	"hello"	Error — $setIsSuperset expects array operands
boolean	true	Error — $setIsSuperset expects array operands
typed date	{"$date":"2026-01-15T15:00:00Z"}	Error — $setIsSuperset expects array operands
empty array	[]	false
numeric array	[1,2,3]	true
object	{"x":1}	Error — $setIsSuperset expects array operands

Argument handling

Invocation	Result
{"$setIsSuperset":[]}	Error — $setIsSuperset requires exactly two arrays.
{"$setIsSuperset":{"unexpected":1}}	Error — $setIsSuperset requires exactly two arrays.

Examples

Expression:

{
  "$setIsSuperset": [
    [
      1,
      2
    ],
    [
      2,
      3
    ]
  ]
}

Input document:

{}

Observed SrotaX result: false.

Detailed input cases

Expand the complete argument-by-argument test matrix

Each table changes only the indicated argument from the example above. Other arguments retain their baseline values. Values normally come from the input field probe; literal configuration arguments are replaced directly. “Missing” means the field is absent, not explicitly null. Numeric strings are strings, not numbers.

Argument: array[0]

Input case	Supplied value	SrotaX result
null	null	Error — $setIsSuperset expects array operands
missing	Field absent	Error — $setIsSuperset expects array operands
zero	0	Error — $setIsSuperset expects array operands
negative	-2	Error — $setIsSuperset expects array operands
decimal	2.5	Error — $setIsSuperset expects array operands
numeric string	"12"	Error — $setIsSuperset expects array operands
text	"hello"	Error — $setIsSuperset expects array operands
empty string	""	Error — $setIsSuperset expects array operands
boolean	true	Error — $setIsSuperset expects array operands
false	false	Error — $setIsSuperset expects array operands
typed date	{"$date":"2026-01-15T15:00:00Z"}	Error — $setIsSuperset expects array operands
decimal128	{"$numberDecimal":"1.25"}	Error — $setIsSuperset expects array operands
empty array	[]	false
numeric array	[1,2,3]	true
mixed array	[1,null,"x",3]	false
nested array	[[1,2],[3]]	false
empty object	{}	Error — $setIsSuperset expects array operands
object	{"x":1}	Error — $setIsSuperset expects array operands
ISO date string	"2026-01-15T15:00:00Z"	Error — $setIsSuperset expects array operands

Argument: other[1]

Input case	Supplied value	SrotaX result
null	null	Error — $setIsSuperset expects array operands
missing	Field absent	Error — $setIsSuperset expects array operands
zero	0	Error — $setIsSuperset expects array operands
negative	-2	Error — $setIsSuperset expects array operands
decimal	2.5	Error — $setIsSuperset expects array operands
numeric string	"12"	Error — $setIsSuperset expects array operands
text	"hello"	Error — $setIsSuperset expects array operands
empty string	""	Error — $setIsSuperset expects array operands
boolean	true	Error — $setIsSuperset expects array operands
false	false	Error — $setIsSuperset expects array operands
typed date	{"$date":"2026-01-15T15:00:00Z"}	Error — $setIsSuperset expects array operands
decimal128	{"$numberDecimal":"1.25"}	Error — $setIsSuperset expects array operands
empty array	[]	true
numeric array	[1,2,3]	false
mixed array	[1,null,"x",3]	false
nested array	[[1,2],[3]]	false
empty object	{}	Error — $setIsSuperset expects array operands
object	{"x":1}	Error — $setIsSuperset expects array operands
ISO date string	"2026-01-15T15:00:00Z"	Error — $setIsSuperset expects array operands

Verification

This page records 41 executed cases. It covers individual argument substitutions, not every cross-product of arguments, locale, daylight-saving transitions, numeric overflow, collation or resource limits. No untested behavior is guaranteed.

Download exact expressions, inputs and SrotaX results. Errors are observed messages, not stable public error codes. The reference generator reads the checked-in execution report; do not edit generated observations by hand.

MongoDB differences

This name is a SrotaX extension or belongs to another MongoDB context. It is not compared as a MongoDB aggregation expression. This is not a missing implementation failure.