Function foreach

cpp/deeplake_pg/deeplake_executor.cpp:443–461

    AttrNumber attno = 1;

    foreach (lc, original_targetlist) {
        TargetEntry* tle = (TargetEntry*)lfirst(lc);

        // Create a new Var node representing this output column
        Var* var = makeVar(INDEX_VAR,                       // varno - special value for scan output
                           attno,                           // varattno - column position
                           exprType((Node*)tle->expr),      // vartype
                           exprTypmod((Node*)tle->expr),    // vartypmod
                           exprCollation((Node*)tle->expr), // varcollid
                           0                                // varlevelsup
        );

        // Create a new target entry with the Var
        TargetEntry* new_tle =
            makeTargetEntry((Expr*)var, attno, tle->resname ? pstrdup(tle->resname) : NULL, tle->resjunk);

        new_targetlist = lappend(new_targetlist, new_tle);
        attno++;
    }

    return new_targetlist;
}