datafusion-optimizer 10.0.0

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//   http://www.apache.org/licenses/LICENSE-2.0
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use arrow::datatypes::{DataType, Field, Schema};
use datafusion_common::Result;
use datafusion_expr::{logical_plan::table_scan, LogicalPlan, LogicalPlanBuilder};

pub mod user_defined;

/// some tests share a common table with different names
pub fn test_table_scan_with_name(name: &str) -> Result<LogicalPlan> {
    let schema = Schema::new(vec![
        Field::new("a", DataType::UInt32, false),
        Field::new("b", DataType::UInt32, false),
        Field::new("c", DataType::UInt32, false),
    ]);
    table_scan(Some(name), &schema, None)?.build()
}

/// some tests share a common table
pub fn test_table_scan() -> Result<LogicalPlan> {
    test_table_scan_with_name("test")
}

/// Scan an empty data source, mainly used in tests
pub fn scan_empty(
    name: Option<&str>,
    table_schema: &Schema,
    projection: Option<Vec<usize>>,
) -> Result<LogicalPlanBuilder> {
    table_scan(name, table_schema, projection)
}

pub fn assert_fields_eq(plan: &LogicalPlan, expected: Vec<&str>) {
    let actual: Vec<String> = plan
        .schema()
        .fields()
        .iter()
        .map(|f| f.name().clone())
        .collect();
    assert_eq!(actual, expected);
}