79 lines
2.4 KiB
PHP
79 lines
2.4 KiB
PHP
<?php
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require_once("db_common.php");
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/*! Implementation of DataWrapper for Oracle
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**/
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class OracleDBDataWrapper extends DBDataWrapper{
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private $last_id=""; //id of previously inserted record
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private $insert_operation=false; //flag of insert operation
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public function query($sql){
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LogMaster::log($sql);
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$stm = oci_parse($this->connection,$sql);
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if ($stm===false) throw new Exception("Oracle - sql parsing failed\n".oci_error($this->connection));
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$out = array(0=>null);
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if($this->insert_operation){
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oci_bind_by_name($stm,":outID",$out[0],999);
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$this->insert_operation=false;
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}
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$mode = ($this->is_record_transaction() || $this->is_global_transaction())?OCI_DEFAULT:OCI_COMMIT_ON_SUCCESS;
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$res=oci_execute($stm,$mode);
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if ($res===false) throw new Exception("Oracle - sql execution failed\n".oci_error($this->connection));
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$this->last_id=$out[0];
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return $stm;
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}
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public function get_next($res){
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$data = oci_fetch_assoc($res);
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if (array_key_exists("VALUE",$data))
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$data["value"]=$data["VALUE"];
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return $data;
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}
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protected function get_new_id(){
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/*
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Oracle doesn't support identity or auto-increment fields
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Insert SQL returns new ID value, which stored in last_id field
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*/
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return $this->last_id;
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}
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protected function insert_query($data,$request){
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$sql = parent::insert_query($data,$request);
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$this->insert_operation=true;
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return $sql." returning ".$this->config->id["db_name"]." into :outID";
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}
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protected function select_query($select,$from,$where,$sort,$start,$count){
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$sql="SELECT ".$select." FROM ".$from;
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if ($where) $sql.=" WHERE ".$where;
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if ($sort) $sql.=" ORDER BY ".$sort;
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if ($start || $count)
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$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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return $sql;
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}
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public function escape($data){
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/*
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as far as I can see the only way to escape data is by using oci_bind_by_name
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while it is neat solution in common case, it conflicts with existing SQL building logic
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fallback to simple escaping
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*/
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return str_replace("'","''",$data);
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}
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public function begin_transaction(){
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//auto-start of transaction
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}
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public function commit_transaction(){
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oci_commit($this->connection);
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}
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public function rollback_transaction(){
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oci_rollback($this->connection);
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}
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}
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?>
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