Struct Planner

pub struct Planner { /* private fields */ }

Implementations

impl Planner

pub fn new(schema: SchemaRef) -> Self

pub fn parse_filter(&self, filter: &str) -> Result<Expr>

Create Logical Expr from a SQL filter clause.

Note: the returned expression must be passed through [optimize_expr()] before being passed to [create_physical_expr()].

pub fn parse_expr(&self, expr: &str) -> Result<Expr>

Create Logical Expr from a SQL expression.

Note: the returned expression must be passed through [optimize_filter()] before being passed to [create_physical_expr()].

pub fn optimize_expr(&self, expr: Expr) -> Result<Expr>

Optimize the filter expression and coerce data types.

pub fn create_physical_expr(&self, expr: &Expr) -> Result<Arc<dyn PhysicalExpr>>

Create the PhysicalExpr from a logical Expr

pub fn column_names_in_expr(expr: &Expr) -> Vec<String>

Collect the columns in the expression.

The columns are returned in sorted order.