<?php
putenv("ORACLE_SID=oracle8");
putenv("ORACLE_HOME=/oracle/product/release/8.1.5");
class db_sql {
var $Debug = 0;
var $sqoe = 1; // sqoe= show query on error
var $Database = "dev";
var $User = "scott";
var $Password = "tiger";
var $Link_ID = 0;
var $Record = array();
var $Row;
var $numRow;
var $Parse;
var $Error = "";
function connect() {
if ( 0 == $this->Link_ID ) {
if($this->Debug) {
printf("<br>Connecting to $this->Database...<br>n");
}
$this->Link_ID=OCILogon("$this->User","$this->Password");
if (!$this->Link_ID) {
$this->halt("Link-ID == false " .
"($this->Link_ID), OCILogon failed");
}
if($this->Debug) {
printf("<br>Obtained the Link_ID: $this->Link_ID<br>n");
}
}
}
function query($Query_String) {
if($Query_String=="")
{
echo "执行语句不能为空！";
return false;
}
$this->connect();
$this->Parse=OCIParse($this->Link_ID,"alter session set NLS_date_format='YYYY-MM-DD HH24:MI:SS'");
if(!$this->Parse) {
$this->Error=OCIError($this->Parse);
return $this->Parse;
} else { OCIExecute($this->Parse);
$this->Error=OCIError($this->Parse);
}
$this->Parse=OCIParse($this->Link_ID,$Query_String);
if(!$this->Parse) {
$this->Error=OCIError($this->Parse);
} else { OCIExecute($this->Parse);
$this->Error=OCIError($this->Parse);
}
$this->Row=0;
if($this->Debug) {
printf("Debug: query = %s<br>n", $Query_String);
}
if ($this->Error["code"]!=1403 && $this->Error["code"]!=0 && $this->sqoe)
echo "<BR><FONT color=red><B>".$this->Error["message"]."<BR>Query :"$Query_String"</B></FONT>";
$numRow=OCIRowCount($this->Parse);
return $this->Parse;
}
function next_record() {
if(0 == OCIFetchInto($this->Parse,$result,OCI_ASSOC+OCI_RETURN_NULLS)) {
if ($this->Debug) {
printf("<br>ID: %d,Rows: %d<br>n",
$this->Link_ID,$this->num_rows());
}
$this->Row +=1;
$errno=OCIError($this->Parse);
if(1403 == $errno) { # 1043 means no more records found
$this->Error="";
$this->disconnect();
$stat=0;
} else {
$this->Error=OCIError($this->Parse);
if($this->Debug) {
printf("<br>Error: %s",
$this->Error["message"]);
}
$stat=0;
}
} else {
for($ix=1;$ix<=OCINumcols($this->Parse);$ix++) {
$col=strtoupper(OCIColumnname($this->Parse,$ix));
$colreturn=strtolower($col);
$this->Record[ "$colreturn" ] = $result["$col"];
if($this->Debug) echo"<b>[$col]</b>:".$result["$col"]."<br>n";
}
$stat=1;
}
return $stat;
}
function record_exist() {
if(0 == OCIFetchInto($this->Parse,$result)) {
return 0;
} else {
return 1;
}
return $stat;
}
function seek($pos) {
$this->Row=$pos;
}
function metadata($table,$full=false) {
$count = 0;
$id = 0;
$res = array();
/*
* Due to compatibility problems with Table we changed the behavior
* of metadata();
* depending on $full, metadata returns the following values:
*
* - full is false (default):
* $result[]:
* [0]["table"] table name
* [0]["name"] field name
* [0]["type"] field type
* [0]["len"] field length
* [0]["flags"] field flags ("NOT NULL", "INDEX")
* [0]["format"] precision and scale of number (eg. "10,2") or empty
* [0]["index"] name of index (if has one)
* [0]["chars"] number of chars (if any char-type)
*
* - full is true
* $result[]:
* ["num_fields"] number of metadata records
* [0]["table"] table name
* [0]["name"] field name
* [0]["type"] field type
* [0]["len"] field length
* [0]["flags"] field flags ("NOT NULL", "INDEX")
* [0]["format"] precision and scale of number (eg. "10,2") or empty
* [0]["index"] name of index (if has one)
* [0]["chars"] number of chars (if any char-type)
* ["meta"][field name] index of field named "field name"
* The last one is used, if you have a field name, but no index.
* Test: if (isset($result['meta']['myfield'])) {} ...
*/
$this->connect();
## This is a RIGHT OUTER JOIN: "(+)", if you want to see, what
## this query results try the following:
## $table = new Table; $db = new my_DB_Sql; # you have to make
## # your own class
## $table->show_results($db->query(see query vvvvvv))
##
$this->query("SELECT T.table_name,T.column_name,T.data_type,".
"T.data_length,T.data_precision,T.data_scale,T.nullable,".
"T.char_col_decl_length,I.index_name".
" FROM ALL_TAB_COLUMNS T,ALL_IND_COLUMNS I".
" WHERE T.column_name=I.column_name (+)".
" AND T.table_name=I.table_name (+)".
" AND T.table_name=UPPER('$table') ORDER BY T.column_id");
$i=0;
while ($this->next_record()) {
$res[$i]["table"] = $this->Record[table_name];
$res[$i]["name"] = strtolower($this->Record[column_name]);
$res[$i]["type"] = $this->Record[data_type];
$res[$i]["len"] = $this->Record[data_length];
if ($this->Record[index_name]) $res[$i]["flags"] = "INDEX ";
$res[$i]["flags"] .= ( $this->Record[nullable] == 'N') ? '' : 'NOT NULL';
$res[$i]["format"]= (int)$this->Record[data_precision].",".
(int)$this->Record[data_scale];
if ("0,0"==$res[$i]["format"]) $res[$i]["format"]='';
$res[$i]["index"] = $this->Record[index_name];
$res[$i]["chars"] = $this->Record[char_col_decl_length];
if ($full) {
$j=$res[$i]["name"];
$res["meta"][$j] = $i;
$res["meta"][strtoupper($j)] = $i;
}
if ($full) $res["meta"][$res[$i]["name"]] = $i;
$i++;
}
if ($full) $res["num_fields"]=$i;
# $this->disconnect();
return $res;
}
function affected_rows() {
return OCIRowCount($this->Parse);
}
function num_rows() {
$iii=0;
while ($this->next_record()) {
$iii++;
}
OCIExecute($this->Parse);
return $iii;
}
function record_rows($tablename,$condition) {
$this->connect();
$this->query("select count(*) as countnum from $tablename where ".$condition);
if ($this->next_record())
return ($this->Record["countnum"]);
else
return 0;
}
function num_fields() {
return OCINumcols($this->Parse);
}
function nf() {
return $this->num_rows();
}
function np() {
print $this->num_rows();
}
function f($Name) {
return $this->Record[$Name];
}
function p($Name) {
print $this->Record[$Name];
}
function commit()
{
return OCICommit($this->Link_ID);
}
function disconnect() {
if($this->Debug) {
printf("Disconnecting...<br>n");
}
OCILogoff($this->Link_ID);
}
function halt($msg) {
printf("</td></tr></table><b>Database error:</b> %s<br>n", $msg);
printf("<b>ORACLE Error</b>: %s<br>n",
$this->Error["message"]);
die("Session halted.");
}
function lock($table, $mode = "write") {
$this->connect();
if ($mode == "write") {
$Parse=OCIParse($this->Link_ID,"lock table $table in row exclusive mode");
OCIExecute($Parse);
} else {
$result = 1;
}
return $result;
}
function unlock() {
return $this->query("commit");
}
function table_names() {
$this->connect();
$this->query("
SELECT table_name,tablespace_name
FROM user_tables");
$i=0;
while ($this->next_record())
{
$info[$i]["table_name"] =$this->Record["table_name"];
$info[$i]["tablespace_name"]=$this->Record["tablespace_name"];
$i++;
}
return $info;
}
}
?>
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