<?php
/**
 * Created by PhpStorm.
 * User: Administrator
 * Date: 2014/12/4
 * Time: 11:31
 */

namespace Westdc\Visual;


class DataTableControl extends Database{

    function __construct()
    {
        parent::__construct();
    }

    public function readSchema(){
        $sql = "SELECT distinct(schemaname) FROM pg_tables WHERE tableowner='gis'";
        $rs = $this->db->query($sql);

        $rows = $rs->fetchAll(\PDO::FETCH_ASSOC);

        foreach($rows as $k=>$v)
        {
            yield $v['schemaname'];
        }
    }

    public function readTables($schema = NULL)
    {
        if(empty($schema))
        {
            $sql = "SELECT schemaname||'.'||tablename as tablename FROM pg_tables WHERE tableowner='gis' ORDER BY tablename ";
            $rs = $this->db->query($sql);

            $row = $rs->fetchAll(\PDO::FETCH_COLUMN);
            return $row;
        }

        $sql = "SELECT tablename as tablename FROM pg_tables WHERE tableowner='gis' AND schemaname='".$schema."' ORDER BY tablename";
        $rs = $this->db->query($sql);
        return $rs->fetchAll(\PDO::FETCH_ASSOC);
    }

    public function readFields($tablename,$identity = "")
    {
        $st=explode('.',$tablename);
        $sql = "select * from INFORMATION_SCHEMA.COLUMNS where table_schema='".$st[0]."' and TABLE_NAME='".$st[1]."'";
        $rs = $this->db->query($sql);
        return $rs->fetchAll(\PDO::FETCH_ASSOC);
    }

}