FunctionChainExpr

A function invocation expression used by a function-chain operation, such as num_combine, decay, or round_decimal.

Java

io.milvus.v2.service.vector.request.FunctionChainExpr

Constructor

This builder creates a function expression with a name, arguments, and named parameters.

Java

FunctionChainExpr.builder()
    .name(String name)
    .arg(FunctionChainArg arg)
    .param(String key, Object value)
    .build()

BUILDER METHODS:

• name(String name)

  The expression name, e.g. "num_combine".

• arg(FunctionChainArg arg)

  Appends an argument, which can be a column reference or a literal. See FunctionChainArg.

• param(String key, Object value)

  Sets a named parameter of the expression.

RETURN TYPE:

FunctionChainExpr

METHODS:

• String getName()

  Returns the expression name.

• List<FunctionChainArg> getArgs()

  Returns the expression arguments.

• Map<String, FunctionParamValue> getParams()

  Returns the named parameters of the expression.

Example

Java

FunctionChainExpr expr = FunctionChainExpr.builder()
        .name("num_combine")
        .arg(FunctionChainArg.col("$score"))
        .arg(FunctionChainArg.col("freshness"))
        .param("mode", "weighted")
        .build();