Remove Expr::GetIndexedField, replace Expr::{field,index,range} with FieldAccessor, IndexAccessor, and SliceAccessor (apache#10568)

* remove expr

Signed-off-by: jayzhan211 <[email protected]>

* add expr extension

Signed-off-by: jayzhan211 <[email protected]>

* doc

Signed-off-by: jayzhan211 <[email protected]>

* move test that has struct

Signed-off-by: jayzhan211 <[email protected]>

* fmt

Signed-off-by: jayzhan211 <[email protected]>

* add foc and fix displayed name

Signed-off-by: jayzhan211 <[email protected]>

* rm test

Signed-off-by: jayzhan211 <[email protected]>

* rebase

Signed-off-by: jayzhan211 <[email protected]>

* move doc

Signed-off-by: jayzhan211 <[email protected]>

---------

Signed-off-by: jayzhan211 <[email protected]>

Author: jayzhan211

datafusion/core/src/datasource/listing/helpers.rs

@@ -84,7 +84,6 @@ pub fn expr_applicable_for_cols(col_names: &[String], expr: &Expr) -> bool {
             | Expr::Exists { .. }
             | Expr::InSubquery(_)
             | Expr::ScalarSubquery(_)
-            | Expr::GetIndexedField { .. }
             | Expr::GroupingSet(_)
             | Expr::Case { .. } => Ok(TreeNodeRecursion::Continue),
 

datafusion/core/src/physical_planner.rs

@@ -83,8 +83,7 @@ use datafusion_common::{
 use datafusion_expr::dml::CopyTo;
 use datafusion_expr::expr::{
     self, AggregateFunction, AggregateFunctionDefinition, Alias, Between, BinaryExpr,
-    Cast, GetFieldAccess, GetIndexedField, GroupingSet, InList, Like, TryCast,
-    WindowFunction,
+    Cast, GroupingSet, InList, Like, TryCast, WindowFunction,
 };
 use datafusion_expr::expr_rewriter::unnormalize_cols;
 use datafusion_expr::expr_vec_fmt;
@@ -216,29 +215,6 @@ fn create_physical_name(e: &Expr, is_first_expr: bool) -> Result<String> {
             let expr = create_physical_name(expr, false)?;
             Ok(format!("{expr} IS NOT UNKNOWN"))
         }
-        Expr::GetIndexedField(GetIndexedField { expr: _, field }) => {
-            match field {
-                GetFieldAccess::NamedStructField { name: _ } => {
-                    unreachable!(
-                        "NamedStructField should have been rewritten in OperatorToFunction"
-                    )
-                }
-                GetFieldAccess::ListIndex { key: _ } => {
-                    unreachable!(
-                        "ListIndex should have been rewritten in OperatorToFunction"
-                    )
-                }
-                GetFieldAccess::ListRange {
-                    start: _,
-                    stop: _,
-                    stride: _,
-                } => {
-                    unreachable!(
-                        "ListRange should have been rewritten in OperatorToFunction"
-                    )
-                }
-            };
-        }
         Expr::ScalarFunction(fun) => fun.func.display_name(&fun.args),
         Expr::WindowFunction(WindowFunction {
             fun,

datafusion/core/tests/expr_api/mod.rs

@@ -21,6 +21,8 @@ use arrow_array::{ArrayRef, RecordBatch, StringArray, StructArray};
 use arrow_schema::{DataType, Field};
 use datafusion::prelude::*;
 use datafusion_common::DFSchema;
+use datafusion_functions::core::expr_ext::FieldAccessor;
+use datafusion_functions_array::expr_ext::{IndexAccessor, SliceAccessor};
 /// Tests of using and evaluating `Expr`s outside the context of a LogicalPlan
 use std::sync::{Arc, OnceLock};
 
@@ -61,7 +63,7 @@ fn test_eq_with_coercion() {
 #[test]
 fn test_get_field() {
     evaluate_expr_test(
-        get_field(col("props"), "a"),
+        col("props").field("a"),
         vec![
             "+------------+",
             "| expr       |",
@@ -77,7 +79,8 @@ fn test_get_field() {
 #[test]
 fn test_nested_get_field() {
     evaluate_expr_test(
-        get_field(col("props"), "a")
+        col("props")
+            .field("a")
             .eq(lit("2021-02-02"))
             .or(col("id").eq(lit(1))),
         vec![
@@ -95,7 +98,7 @@ fn test_nested_get_field() {
 #[test]
 fn test_list() {
     evaluate_expr_test(
-        array_element(col("list"), lit(1i64)),
+        col("list").index(lit(1i64)),
         vec![
             "+------+", "| expr |", "+------+", "| one  |", "| two  |", "| five |",
             "+------+",
@@ -106,7 +109,7 @@ fn test_list() {
 #[test]
 fn test_list_range() {
     evaluate_expr_test(
-        array_slice(col("list"), lit(1i64), lit(2i64), None),
+        col("list").range(lit(1i64), lit(2i64)),
         vec![
             "+--------------+",
             "| expr         |",

datafusion/core/tests/optimizer_integration.rs

@@ -23,11 +23,19 @@ use std::collections::HashMap;
 use std::sync::Arc;
 
 use arrow::datatypes::{DataType, Field, Schema, SchemaRef, TimeUnit};
+use arrow_schema::{Fields, SchemaBuilder};
 use datafusion_common::config::ConfigOptions;
-use datafusion_common::{plan_err, Result};
-use datafusion_expr::{AggregateUDF, LogicalPlan, ScalarUDF, TableSource, WindowUDF};
+use datafusion_common::tree_node::{TransformedResult, TreeNode};
+use datafusion_common::{plan_err, DFSchema, Result, ScalarValue};
+use datafusion_expr::interval_arithmetic::{Interval, NullableInterval};
+use datafusion_expr::{
+    col, lit, AggregateUDF, BinaryExpr, Expr, ExprSchemable, LogicalPlan, Operator,
+    ScalarUDF, TableSource, WindowUDF,
+};
+use datafusion_functions::core::expr_ext::FieldAccessor;
 use datafusion_optimizer::analyzer::Analyzer;
 use datafusion_optimizer::optimizer::Optimizer;
+use datafusion_optimizer::simplify_expressions::GuaranteeRewriter;
 use datafusion_optimizer::{OptimizerConfig, OptimizerContext};
 use datafusion_sql::planner::{ContextProvider, SqlToRel};
 use datafusion_sql::sqlparser::ast::Statement;
@@ -233,3 +241,120 @@ impl TableSource for MyTableSource {
         self.schema.clone()
     }
 }
+
+#[test]
+fn test_nested_schema_nullability() {
+    let mut builder = SchemaBuilder::new();
+    builder.push(Field::new("foo", DataType::Int32, true));
+    builder.push(Field::new(
+        "parent",
+        DataType::Struct(Fields::from(vec![Field::new(
+            "child",
+            DataType::Int64,
+            false,
+        )])),
+        true,
+    ));
+    let schema = builder.finish();
+
+    let dfschema = DFSchema::from_field_specific_qualified_schema(
+        vec![Some("table_name".into()), None],
+        &Arc::new(schema),
+    )
+    .unwrap();
+
+    let expr = col("parent").field("child");
+    assert!(expr.nullable(&dfschema).unwrap());
+}
+
+#[test]
+fn test_inequalities_non_null_bounded() {
+    let guarantees = vec![
+        // x ∈ [1, 3] (not null)
+        (
+            col("x"),
+            NullableInterval::NotNull {
+                values: Interval::make(Some(1_i32), Some(3_i32)).unwrap(),
+            },
+        ),
+        // s.y ∈ [1, 3] (not null)
+        (
+            col("s").field("y"),
+            NullableInterval::NotNull {
+                values: Interval::make(Some(1_i32), Some(3_i32)).unwrap(),
+            },
+        ),
+    ];
+
+    let mut rewriter = GuaranteeRewriter::new(guarantees.iter());
+
+    // (original_expr, expected_simplification)
+    let simplified_cases = &[
+        (col("x").lt(lit(0)), false),
+        (col("s").field("y").lt(lit(0)), false),
+        (col("x").lt_eq(lit(3)), true),
+        (col("x").gt(lit(3)), false),
+        (col("x").gt(lit(0)), true),
+        (col("x").eq(lit(0)), false),
+        (col("x").not_eq(lit(0)), true),
+        (col("x").between(lit(0), lit(5)), true),
+        (col("x").between(lit(5), lit(10)), false),
+        (col("x").not_between(lit(0), lit(5)), false),
+        (col("x").not_between(lit(5), lit(10)), true),
+        (
+            Expr::BinaryExpr(BinaryExpr {
+                left: Box::new(col("x")),
+                op: Operator::IsDistinctFrom,
+                right: Box::new(lit(ScalarValue::Null)),
+            }),
+            true,
+        ),
+        (
+            Expr::BinaryExpr(BinaryExpr {
+                left: Box::new(col("x")),
+                op: Operator::IsDistinctFrom,
+                right: Box::new(lit(5)),
+            }),
+            true,
+        ),
+    ];
+
+    validate_simplified_cases(&mut rewriter, simplified_cases);
+
+    let unchanged_cases = &[
+        col("x").gt(lit(2)),
+        col("x").lt_eq(lit(2)),
+        col("x").eq(lit(2)),
+        col("x").not_eq(lit(2)),
+        col("x").between(lit(3), lit(5)),
+        col("x").not_between(lit(3), lit(10)),
+    ];
+
+    validate_unchanged_cases(&mut rewriter, unchanged_cases);
+}
+
+fn validate_simplified_cases<T>(rewriter: &mut GuaranteeRewriter, cases: &[(Expr, T)])
+where
+    ScalarValue: From<T>,
+    T: Clone,
+{
+    for (expr, expected_value) in cases {
+        let output = expr.clone().rewrite(rewriter).data().unwrap();
+        let expected = lit(ScalarValue::from(expected_value.clone()));
+        assert_eq!(
+            output, expected,
+            "{} simplified to {}, but expected {}",
+            expr, output, expected
+        );
+    }
+}
+fn validate_unchanged_cases(rewriter: &mut GuaranteeRewriter, cases: &[Expr]) {
+    for expr in cases {
+        let output = expr.clone().rewrite(rewriter).data().unwrap();
+        assert_eq!(
+            &output, expr,
+            "{} was simplified to {}, but expected it to be unchanged",
+            expr, output
+        );
+    }
+}