Function json_get_text_idx 

pub fn json_get_text_idx<'a, E>(
    expr: E,
    index: i32,
) -> SQLExpr<'a, PostgresValue<'a>, Text, Null, E::Aggregate, E::Sources>
where
    E: Expr<'a, PostgresValue<'a>>,
    E::SQLType: JsonType,

Gets an array element by zero-based index as text (->>).

The operand must be json or jsonb (JsonType). The result is NULL when the index is out of range.

Examples

use drizzle_postgres::expr::json_get_text_idx;
use drizzle_core::{ToSQL, expr::raw_non_null};
use drizzle_postgres::values::PostgresValue;
use drizzle_types::postgres::types::Jsonb;

let data = raw_non_null::<PostgresValue, Jsonb>("data");
let first = json_get_text_idx(data, 0);
assert_eq!(first.to_sql().sql(), "data ->> CAST ($1 AS INTEGER)");