Struct ExprContainer

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pub struct ExprContainer {
    pub input_schema: DFSchemaRef,
    pub exprs: Vec<(Expr, Field)>,
}
Expand description

An ExprContainer is a container for a collection of expressions with a common input schema

In addition, each expression is associated with a field, which defines the expression’s output. The data type and nullability of the field are calculated from the expression and the input schema. However the names of the field (and its nested fields) are derived from the Substrait message.

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§input_schema: DFSchemaRef

The input schema for the expressions

§exprs: Vec<(Expr, Field)>

The expressions

Each item contains an expression and the field that defines the expected nullability and name of the expr’s output

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