Struct datafusion_functions::planner::UserDefinedFunctionPlanner

pub struct UserDefinedFunctionPlanner;

Trait Implementations

impl Default for UserDefinedFunctionPlanner

fn default() -> UserDefinedFunctionPlanner

Returns the “default value” for a type.

impl ExprPlanner for UserDefinedFunctionPlanner

fn plan_extract(&self, args: Vec<Expr>) -> Result<PlannerResult<Vec<Expr>>>

Plan an extract expression, e.g., EXTRACT(month FROM foo)

fn plan_position(&self, args: Vec<Expr>) -> Result<PlannerResult<Vec<Expr>>>

fn plan_substring(&self, args: Vec<Expr>) -> Result<PlannerResult<Vec<Expr>>>

Plan an substring expression, e.g., SUBSTRING(<expr> [FROM <expr>] [FOR <expr>])

fn plan_binary_op( &self, expr: RawBinaryExpr, _schema: &DFSchema, ) -> Result<PlannerResult<RawBinaryExpr>, DataFusionError>

Plan the binary operation between two expressions, returns original BinaryExpr if not possible

fn plan_field_access( &self, expr: RawFieldAccessExpr, _schema: &DFSchema, ) -> Result<PlannerResult<RawFieldAccessExpr>, DataFusionError>

Plan the field access expression

fn plan_array_literal( &self, exprs: Vec<Expr>, _schema: &DFSchema, ) -> Result<PlannerResult<Vec<Expr>>, DataFusionError>

Plan the array literal, returns OriginalArray if not possible

fn plan_dictionary_literal( &self, expr: RawDictionaryExpr, _schema: &DFSchema, ) -> Result<PlannerResult<RawDictionaryExpr>, DataFusionError>

Plan the dictionary literal { key: value, ...}

fn plan_struct_literal( &self, args: Vec<Expr>, _is_named_struct: bool, ) -> Result<PlannerResult<Vec<Expr>>, DataFusionError>

Plans a struct struct(expression1[, ..., expression_n]) literal based on the given input expressions. This function takes a vector of expressions and a boolean flag indicating whether the struct uses the optional name