1 | <?php
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2 | require_once("db_common.php");
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3 | /*! Implementation of DataWrapper for Oracle
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4 | **/
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5 | class OracleDBDataWrapper extends DBDataWrapper{
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6 | private $last_id=""; //id of previously inserted record
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7 | private $insert_operation=false; //flag of insert operation
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8 |
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9 | public function query($sql){
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10 | LogMaster::log($sql);
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11 | $stm = oci_parse($this->connection,$sql);
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12 | if ($stm===false) throw new Exception("Oracle - sql parsing failed\n".oci_error($this->connection));
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13 |
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14 | $out = array(0=>null);
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15 | if($this->insert_operation){
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16 | oci_bind_by_name($stm,":outID",$out[0],999);
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17 | $this->insert_operation=false;
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18 | }
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19 |
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20 |
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21 | $mode = ($this->is_record_transaction() || $this->is_global_transaction())?OCI_DEFAULT:OCI_COMMIT_ON_SUCCESS;
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22 | $res=oci_execute($stm,$mode);
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23 | if ($res===false) throw new Exception("Oracle - sql execution failed\n".oci_error($this->connection));
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24 |
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25 | $this->last_id=$out[0];
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26 |
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27 | return $stm;
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28 | }
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29 |
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30 | public function get_next($res){
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31 | $data = oci_fetch_assoc($res);
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32 | if (array_key_exists("VALUE",$data))
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33 | $data["value"]=$data["VALUE"];
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34 | return $data;
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35 | }
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36 |
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37 | protected function get_new_id(){
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38 | /*
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39 | Oracle doesn't support identity or auto-increment fields
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40 | Insert SQL returns new ID value, which stored in last_id field
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41 | */
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42 | return $this->last_id;
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43 | }
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44 |
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45 | protected function insert_query($data,$request){
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46 | $sql = parent::insert_query($data,$request);
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47 | $this->insert_operation=true;
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48 | return $sql." returning ".$this->config->id["db_name"]." into :outID";
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49 | }
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50 |
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51 | protected function select_query($select,$from,$where,$sort,$start,$count){
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52 | $sql="SELECT ".$select." FROM ".$from;
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53 | if ($where) $sql.=" WHERE ".$where;
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54 | if ($sort) $sql.=" ORDER BY ".$sort;
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55 | if ($start || $count)
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56 | $sql="SELECT * FROM ( select /*+ FIRST_ROWS(".$count.")*/dhx_table.*, ROWNUM rnum FROM (".$sql.") dhx_table where ROWNUM <= ".($count+$start)." ) where rnum >".$start;
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57 | return $sql;
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58 | }
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59 |
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60 | public function escape($data){
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61 | /*
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62 | as far as I can see the only way to escape data is by using oci_bind_by_name
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63 | while it is neat solution in common case, it conflicts with existing SQL building logic
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64 | fallback to simple escaping
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65 | */
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66 | return str_replace("'","''",$data);
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67 | }
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68 |
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69 | public function begin_transaction(){
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70 | //auto-start of transaction
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71 | }
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72 | public function commit_transaction(){
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73 | oci_commit($this->connection);
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74 | }
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75 | public function rollback_transaction(){
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76 | oci_rollback($this->connection);
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77 | }
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78 | }
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79 | ?> |
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