Function report_error 

pub fn report_error(code: PgSqlErrorCode, msg: &str)

Report error to Postgres using ereport!

A simple wrapper of Postgres’s ereport! function to emit error message and aborts the current transaction.

For example,

use pgrx::prelude::PgSqlErrorCode;

report_error(
    PgSqlErrorCode::ERRCODE_FDW_INVALID_COLUMN_NUMBER,
    &format!("target column number not match"),
);