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https://github.com/EGroupware/egroupware.git
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433 lines
13 KiB
PHP
433 lines
13 KiB
PHP
<?php
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/*
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* Oracle accessor based on Session Management for PHP3
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*
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* Copyright (c) 1998-2000 Luis Francisco Gonzalez Hernandez
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*
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* $Id$
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*
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*/
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class db {
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var $Debug = false;
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var $Home = "/u01/app/oracle/product/8.0.4";
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var $Remote = 1;
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/* Due to a strange error with Oracle 8.0.5, Apache and PHP3.0.6
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you don't need to set the ENV - on my system Apache
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will change to a zombie, if I don't set this to FALSE!
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If unsure try it out, if it works. */
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var $OraPutEnv = true;
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var $Database = "";
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var $User = "";
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var $Password = "";
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var $Link_ID = 0;
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var $Query_ID = 0;
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var $Record = array();
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var $Row;
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var $Errno = 0;
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var $Error = "";
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var $ora_no_next_fetch=false;
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/* copied from db_mysql for completeness */
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/* public: identification constant. never change this. */
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var $type = "oracle";
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var $revision = "1.2";
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var $Halt_On_Error = "yes"; ## "yes" (halt with message), "no" (ignore errors quietly), "report" (ignore errror, but spit a warning)
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/* public: constructor */
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function db($query = "") {
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$this->query($query);
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}
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/* public: some trivial reporting */
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function link_id() {
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return $this->Link_ID;
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}
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function query_id() {
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return $this->Query_ID;
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}
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function connect() {
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## see above why we do this
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if ($this->OraPutEnv) {
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PutEnv("ORACLE_SID=$this->Database");
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PutEnv("ORACLE_HOME=$this->Home");
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}
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if ( 0 == $this->Link_ID ) {
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if($this->Debug) {
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printf("<br>Connect()ing to $this->Database...<br>\n");
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}
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if($this->Remote) {
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if($this->Debug) {
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printf("<br>connect() $this->User/******@$this->Database.world<br>\n");
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}
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$this->Link_ID=ora_plogon
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("$this->User/$this->Password@$this->Database","");
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/************** (comment by SSilk)
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this dosn't work on my system:
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$this->Link_ID=ora_plogon
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("$this->User@$this->Database.world","$this->Password");
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***************/
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} else {
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if($this->Debug) {
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printf("<br>connect() $this->User, $this->Password <br>\n");
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}
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$this->Link_ID=ora_plogon("$this->User","$this->Password");
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/* (comment by SSilk: don't know how this could work, but I leave this untouched!) */
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}
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if($this->Debug) {
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printf("<br>connect() Link_ID: $this->Link_ID<br>\n");
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}
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if (!$this->Link_ID) {
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$this->halt("connect() Link-ID == false " .
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"($this->Link_ID), ora_plogon failed");
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} else {
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//echo "commit on<p>";
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ora_commiton($this->Link_ID);
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}
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if($this->Debug) {
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printf("<br>connect() Obtained the Link_ID: $this->Link_ID<br>\n");
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}
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}
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}
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## In order to increase the # of cursors per system/user go edit the
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## init.ora file and increase the max_open_cursors parameter. Yours is on
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## the default value, 100 per user.
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## We tried to change the behaviour of query() in a way, that it tries
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## to safe cursors, but on the other side be carefull with this, that you
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## don't use an old result.
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##
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## You can also make extensive use of ->disconnect()!
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## The unused QueryIDs will be recycled sometimes.
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function query($Query_String) {
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/* No empty queries, please, since PHP4 chokes on them. */
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if ($Query_String == "")
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/* The empty query string is passed on from the constructor,
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* when calling the class without a query, e.g. in situations
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* like these: '$db = new DB_Sql_Subclass;'
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*/
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return 0;
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$this->connect();
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$this->lastQuery=$Query_String;
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if (!$this->Query_ID) {
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$this->Query_ID= ora_open($this->Link_ID);
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}
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if($this->Debug) {
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printf("Debug: query = %s<br>\n", $Query_String);
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printf("<br>Debug: Query_ID: %d<br>\n", $this->Query_ID);
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}
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if(!@ora_parse($this->Query_ID,$Query_String)) {
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$this->Errno=ora_errorcode($this->Query_ID);
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$this->Error=ora_error($this->Query_ID);
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$this->halt("<BR>ora_parse() failed:<BR>$Query_String<BR><small>Snap & paste this to sqlplus!</SMALL>");
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} elseif (!@ora_exec($this->Query_ID)) {
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$this->Errno=ora_errorcode($this->Query_ID);
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$this->Error=ora_error($this->Query_ID);
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$this->halt("<BR>\n$Query_String\n<BR><small>Snap & paste this to sqlplus!</SMALL>");
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}
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$this->Row=0;
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if(!$this->Query_ID) {
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$this->halt("Invalid SQL: ".$Query_String);
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}
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return $this->Query_ID;
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}
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function next_record() {
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if (!$this->no_next_fetch &&
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0 == ora_fetch($this->Query_ID)) {
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if ($this->Debug) {
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printf("<br>next_record(): ID: %d,Rows: %d<br>\n",
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$this->Query_ID,$this->num_rows());
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}
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$this->Row +=1;
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$errno=ora_errorcode($this->Query_ID);
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if(1403 == $errno) { # 1043 means no more records found
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$this->Errno=0;
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$this->Error="";
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$this->disconnect();
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$stat=0;
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} else {
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$this->Error=ora_error($this->Query_ID);
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$this->Errno=$errno;
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if($this->Debug) {
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printf("<br>%d Error: %s",
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$this->Errno,
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$this->Error);
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}
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$stat=0;
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}
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} else {
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$this->no_next_fetch=false;
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for($ix=0;$ix<ora_numcols($this->Query_ID);$ix++) {
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$col=strtolower(ora_columnname($this->Query_ID,$ix));
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$value=ora_getcolumn($this->Query_ID,$ix);
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$this->Record[ "$col" ] = $value;
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# echo"<b>[$col]</b>: $value <br>\n";
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}
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$stat=1;
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}
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return $stat;
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}
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## seek() works only for $pos - 1 and $pos
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## Perhaps I make a own implementation, but my
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## opinion is, that this should be done by PHP3
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function seek($pos) {
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if ($this->Row - 1 == $pos) {
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$this->no_next_fetch=true;
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} elseif ($this->Row == $pos ) {
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## do nothing
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} else {
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$this->halt("Invalid seek(): Position is cannot be handled by API.<BR>".
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"Difference too big. Wanted: $pos Current pos: $this->Row");
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}
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if ($Debug) echo "<BR>Debug: seek = $pos<BR>";
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$this->Row=$pos;
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}
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function lock($table, $mode = "write") {
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if ($mode == "write") {
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$result = ora_do($this->Link_ID, "lock table $table in row exclusive mode");
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} else {
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$result = 1;
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}
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return $result;
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}
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function unlock() {
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return ora_do($this->Link_ID, "commit");
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}
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function metadata($table,$full=false) {
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$count = 0;
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$id = 0;
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$res = array();
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/*
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* Due to compatibility problems with Table we changed the behavior
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* of metadata();
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* depending on $full, metadata returns the following values:
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*
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* - full is false (default):
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* $result[]:
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* [0]["table"] table name
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* [0]["name"] field name
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* [0]["type"] field type
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* [0]["len"] field length
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* [0]["flags"] field flags ("NOT NULL", "INDEX")
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* [0]["format"] precision and scale of number (eg. "10,2") or empty
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* [0]["index"] name of index (if has one)
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* [0]["chars"] number of chars (if any char-type)
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*
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* - full is true
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* $result[]:
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* ["num_fields"] number of metadata records
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* [0]["table"] table name
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* [0]["name"] field name
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* [0]["type"] field type
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* [0]["len"] field length
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* [0]["flags"] field flags ("NOT NULL", "INDEX")
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* [0]["format"] precision and scale of number (eg. "10,2") or empty
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* [0]["index"] name of index (if has one)
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* [0]["chars"] number of chars (if any char-type)
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* ["meta"][field name] index of field named "field name"
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* The last one is used, if you have a field name, but no index.
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* Test: if (isset($result['meta']['myfield'])) {} ...
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*/
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$this->connect();
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## This is a RIGHT OUTER JOIN: "(+)", if you want to see, what
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## this query results try the following:
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## $table = new Table; $db = new my_DB_Sql; # you have to make
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## # your own class
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## $table->show_results($db->query(see query vvvvvv))
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##
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$this->query("SELECT T.table_name,T.column_name,T.data_type,".
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"T.data_length,T.data_precision,T.data_scale,T.nullable,".
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"T.char_col_decl_length,I.index_name".
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" FROM ALL_TAB_COLUMNS T,ALL_IND_COLUMNS I".
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" WHERE T.column_name=I.column_name (+)".
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" AND T.table_name=I.table_name (+)".
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" AND T.table_name=UPPER('$table') ORDER BY T.column_id");
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$i=0;
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while ($this->next_record()) {
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$res[$i]["table"] = $this->Record[table_name];
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$res[$i]["name"] = strtolower($this->Record[column_name]);
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$res[$i]["type"] = $this->Record[data_type];
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$res[$i]["len"] = $this->Record[data_length];
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if ($this->Record[index_name]) $res[$i]["flags"] = "INDEX ";
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$res[$i]["flags"] .= ( $this->Record[nullable] == 'N') ? '' : 'NOT NULL';
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$res[$i]["format"]= (int)$this->Record[data_precision].",".
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(int)$this->Record[data_scale];
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if ("0,0"==$res[$i]["format"]) $res[$i]["format"]='';
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$res[$i]["index"] = $this->Record[index_name];
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$res[$i]["chars"] = $this->Record[char_col_decl_length];
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if ($full) {
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$j=$res[$i]["name"];
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$res["meta"][$j] = $i;
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$res["meta"][strtoupper($j)] = $i;
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}
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if ($full) $res["meta"][$res[$i]["name"]] = $i;
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$i++;
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}
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if ($full) $res["num_fields"]=$i;
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# $this->disconnect();
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return $res;
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}
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## THIS FUNCTION IS UNSTESTED!
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function affected_rows() {
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if ($Debug) echo "<BR>Debug: affected_rows=". ora_numrows($this->Query_ID)."<BR>";
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return ora_numrows($this->Query_ID);
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}
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## Known bugs: It will not work for SELECT DISTINCT and any
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## other constructs which are depending on the resulting rows.
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## So you *really need* to check every query you make, if it
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## will work with it.
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##
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## Also, for a qualified replacement you need to parse the
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## selection, cause this will fail: "SELECT id, from FROM ...").
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## "FROM" is - as far as I know a keyword in Oracle, so it can
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## only be used in this way. But you have been warned.
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function num_rows() {
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$curs=ora_open($this->Link_ID);
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## this is the important part and it is also the HACK!
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if (eregi("^[[:space:]]*SELECT[[:space:]]",$this->lastQuery) ) {
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$from_pos = strpos(strtoupper($this->lastQuery),"FROM");
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$q = "SELECT count(*) ". substr($this->lastQuery, $from_pos);
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ORA_parse($curs,$q);
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ORA_exec($curs);
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ORA_fetch($curs);
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if ($Debug) echo "<BR>Debug: num_rows=". ORA_getcolumn($curs,0)."<BR>";
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return(ORA_getcolumn($curs,0));
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} else {
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$this->halt("Last Query was not a SELECT: $this->lastQuery");
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}
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}
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function num_fields() {
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if ($Debug) echo "<BR>Debug: num_fields=". ora_numcols($this->Query_ID) . "<BR>";
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return ora_numcols($this->Query_ID);
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}
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function nf() {
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return $this->num_rows();
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}
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function np() {
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print $this->num_rows();
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}
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function f($Name) {
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return $this->Record[$Name];
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}
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function p($Name) {
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print $this->Record[$Name];
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}
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/* public: sequence number */
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function nextid($seq_name)
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{
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$this->connect();
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/* Independent Query_ID */
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$Query_ID = ora_open($this->Link_ID);
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if(!@ora_parse($Query_ID,"SELECT $seq_name.NEXTVAL FROM DUAL"))
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{
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// There is no such sequence yet, then create it
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if(!@ora_parse($Query_ID,"CREATE SEQUENCE $seq_name")
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||
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!@ora_exec($Query_ID)
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)
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{
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$this->halt("<BR> nextid() function - unable to create sequence");
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return 0;
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}
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@ora_parse($Query_ID,"SELECT $seq_name.NEXTVAL FROM DUAL");
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}
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if (!@ora_exec($Query_ID)) {
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$this->halt("<BR>ora_exec() failed:<BR>nextID function");
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}
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if (@ora_fetch($Query_ID) ) {
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$next_id = ora_getcolumn($Query_ID, 0);
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}
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else {
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$next_id = 0;
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}
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if ( Query_ID > 0 ) {
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ora_close(Query_ID);
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}
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return $next_id;
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}
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function disconnect() {
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if($this->Debug) {
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echo "Debug: Disconnecting $this->Query_ID...<br>\n";
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}
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if ( $this->Query_ID < 1 ) {
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echo "<B>Warning</B>: disconnect(): Cannot free ID $this->Query_ID\n";
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# return();
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}
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ora_close($this->Query_ID);
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$this->Query_ID=0;
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}
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/* private: error handling */
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function halt($msg) {
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if ($this->Halt_On_Error == "no")
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return;
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$this->haltmsg($msg);
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if ($this->Halt_On_Error != "report")
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die("Session halted.");
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}
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function haltmsg($msg) {
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printf("<b>Database error:</b> %s<br>\n", $msg);
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printf("<b>Oracle Error</b>: %s (%s)<br>\n",
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$this->Errno,
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$this->Error);
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}
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function table_names() {
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$this->connect();
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$this->query("
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SELECT table_name,tablespace_name
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FROM user_tables");
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$i=0;
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while ($this->next_record())
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{
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$info[$i]["table_name"] =$this->Record["table_name"];
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$info[$i]["tablespace_name"]=$this->Record["tablespace_name"];
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$i++;
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}
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return $info;
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}
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}
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