1 | <?php
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2 | require_once("db_common.php");
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3 | /*! Implementation of DataWrapper for PostgreSQL
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4 | **/
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5 | class PostgreDBDataWrapper extends DBDataWrapper{
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6 | public function query($sql){
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7 | LogMaster::log($sql);
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8 |
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9 | $res=pg_query($this->connection,$sql);
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10 | if ($res===false) throw new Exception("Postgre - sql execution failed\n".pg_last_error($this->connection));
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11 |
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12 | return $res;
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13 | }
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14 |
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15 | protected function select_query($select,$from,$where,$sort,$start,$count){
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16 | $sql="SELECT ".$select." FROM ".$from;
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17 | if ($where) $sql.=" WHERE ".$where;
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18 | if ($sort) $sql.=" ORDER BY ".$sort;
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19 | if ($start || $count)
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20 | $sql.=" OFFSET ".$start." LIMIT ".$count;
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21 | return $sql;
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22 | }
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23 |
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24 | public function get_next($res){
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25 | return pg_fetch_assoc($res);
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26 | }
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27 |
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28 | protected function get_new_id(){
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29 | $res = pg_query( $this->connection, "SELECT LASTVAL() AS seq");
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30 | $data = pg_fetch_assoc($res);
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31 | pg_free_result($res);
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32 | return $data['seq'];
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33 | }
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34 |
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35 | public function escape($data){
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36 | //need to use oci_bind_by_name
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37 | return pg_escape_string($this->connection,$data);
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38 | }
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39 |
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40 | public function tables_list() {
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41 | $sql = "SELECT table_name FROM information_schema.tables WHERE table_schema = 'public'";
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42 | $res = pg_query($this->connection, $sql);
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43 | $tables = array();
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44 | while ($table = pg_fetch_assoc($res)) {
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45 | $tables[] = $table['table_name'];
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46 | }
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47 | return $tables;
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48 | }
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49 |
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50 | public function fields_list($table) {
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51 | $sql = "SELECT * FROM information_schema.constraint_column_usage";
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52 | $result = pg_query($this->connection, $sql);
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53 | $field = pg_fetch_assoc($result);
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54 | $id = $field['column_name'];
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55 |
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56 | $sql = "SELECT * FROM information_schema.columns WHERE table_name ='".$table."';";
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57 | $result = pg_query($this->connection, $sql);
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58 | $fields = array();
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59 | $id = "";
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60 | while ($field = pg_fetch_assoc($result)) {
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61 | $fields[] = $field["column_name"];
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62 | }
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63 | return array('fields' => $fields, 'key' => $id );
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64 | }
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65 | }
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66 | ?> |
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