Render an MFP using the default (concise) syntax.
(
&self,
f: &mut fmt::Formatter<'_>,
ctx: &mut PlanRenderingContext<'_, T>,
)
| 264 | { |
| 265 | /// Render an MFP using the default (concise) syntax. |
| 266 | pub fn fmt_default_text<T>( |
| 267 | &self, |
| 268 | f: &mut fmt::Formatter<'_>, |
| 269 | ctx: &mut PlanRenderingContext<'_, T>, |
| 270 | ) -> fmt::Result { |
| 271 | if self.expr.projection.len() != self.expr.input_arity |
| 272 | || self |
| 273 | .expr |
| 274 | .projection |
| 275 | .iter() |
| 276 | .enumerate() |
| 277 | .any(|(i, p)| i != *p) |
| 278 | { |
| 279 | if self.expr.projection.len() == 0 { |
| 280 | writeln!(f, "{}Project: ()", ctx.indent)?; |
| 281 | } else { |
| 282 | let outputs = Indices(&self.expr.projection); |
| 283 | writeln!(f, "{}Project: {outputs}", ctx.indent)?; |
| 284 | } |
| 285 | } |
| 286 | |
| 287 | // render `filter` field iff predicates are present |
| 288 | if !self.expr.predicates.is_empty() { |
| 289 | let predicates = self.expr.predicates.iter().map(|(_, p)| self.child(p)); |
| 290 | let predicates = separated(" AND ", predicates); |
| 291 | writeln!(f, "{}Filter: {predicates}", ctx.indent)?; |
| 292 | } |
| 293 | // render `map` field iff scalars are present |
| 294 | if !self.expr.expressions.is_empty() { |
| 295 | let scalars = self.expr.expressions.iter().map(|s| self.child(s)); |
| 296 | let scalars = separated(", ", scalars); |
| 297 | writeln!(f, "{}Map: {scalars}", ctx.indent)?; |
| 298 | } |
| 299 | |
| 300 | Ok(()) |
| 301 | } |
| 302 | } |
| 303 | |
| 304 | /// `EXPLAIN ... AS TEXT` support for [`MirRelationExpr`]. |