oracle资料库函式库

"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)] = $i;
switch ($res[$i]["type"]) {
case "VARCHAR2" :
case "VARCHAR" :
case "CHAR" :
$res["php_type"]="string";
$res["php_subtype"]="";
break;
case "DATE" :
$res["php_type"]="string";
$res["php_subtype"]="date";
break;
case "BLOB" :
case "CLOB" :
case "BFILE" :
case "RAW" :
case "LONG" :
case "LONG RAW" :
$res["php_type"]="string";
$res["php_subtype"]="blob";
break;
case "NUMBER" :
if ($res[$i]["format"]) {
$res["php_type"]="double";
$res["php_subtype"]="";
} else {
$res["php_type"]="int";
$res["php_subtype"]="";
}
break;
default :
$this->halt("metadata(): Type is not a valid value: '$res[$i][type]'");
break;
}
}
if ($full) $res["meta"][$res[$i]["name"]] = $i;
$i++;
}
if ($full) $res["num_fields"]=$i;
# $this->disconnect();
return $res;
}

## THIS FUNCTION IS UNSTESTED!
function affected_rows() {
if ($this->Debug) echo "<BR>Debug: affected_rows=". ora_numrows($this->Query_ID)."<BR>";
return ora_numrows($this->Query_ID);
}

## Known bugs: It will not work for SELECT DISTINCT and any
## other constructs which are depending on the resulting rows.
## So you *really need* to check every query you make, if it
## will work with it!
##
## Also, for a qualified replacement you need to parse the
## selection, cause this will fail: "SELECT id, from FROM ...").
## "from" is - as far as I know a keyword in Oracle, so it can
## only be used in this way. But you have been warned.
function num_rows() {
$curs=ora_open($this->Link_ID);

## this is the important part and it is also the HACK!
if (eregi("^[[:space:]]*SELECT[[:space:]]",$this->lastQuery) )  
{

# This works for all?? cases, including SELECT DISTINCT case.
# We just make select count(*) from original sql expression
# and remove ORDER BY (if any) for speed
# I like regular expressions too ;-)))  
$q = sprintf("SELECT COUNT(*) FROM (%s)",
@eregi_Replace("ORDER[[:space:]]+BY[^)]*()*)", "\1",  
$this->lastQuery)  
);

# works also for subselects:
# if (eregi("[[:space:]]+FROM([[:space:]]+.*[[:space:]]+FROM)",$this->lastQuery,$r))
# $areplace=$r[1];
# $q=eregi_Replace("^[[:space:]]*SELECT[[:space:]]+".
# ".*[[:space:]]+FROM",
# "SELECT COUNT(*) FROM$areplace",
# $this->lastQuery);

if ($this->Debug) echo "<BR>Debug: num_rows: $q<BR>";

ORA_parse($curs,$q);
ORA_exec($curs);
ORA_fetch($curs);
$result = ORA_getcolumn($curs,0);
ORA_close($curs);
if ($this->Debug)
{  
echo "<BR>Debug: ID ".$this->QueryID.
" num_rows=". $result ."<BR>";
}
return $result;
}  
else  
{
$this->halt("Last Query was not a SELECT: $this->lastQuery");
}
}

function num_fields() {
if ($this->Debug) echo "<BR>Debug: num_fields=". ora_numcols($this->Query_ID) . "<BR>";

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