Function dfq_first_value 

pub fn dfq_first_value(
    sort_exprs: Option<Vec<SortExpr>>,
) -> Arc<CalculationRule>

Returns the first value in the column.

Arguments

• sort_exprs - Optional sort expressions to determine the order

Examples

use datafusion_quality::rules::table::dfq_first_value;
use datafusion_quality::RuleSet;

// Create a rule to get the first value in the age column
let rule = dfq_first_value(None);
let mut ruleset = RuleSet::new();
ruleset.with_table_rule("age", rule, None);