晋太元中,武陵人捕鱼为业。缘溪行,忘路之远近。忽逢桃花林,夹岸数百步,中无杂树,芳草鲜美,落英缤纷。渔人甚异之,复前行,欲穷其林。 林尽水源,便得一山,山有小口,仿佛若有光。便舍船,从口入。初极狭,才通人。复行数十步,豁然开朗。土地平旷,屋舍俨然,有良田、美池、桑竹之属。阡陌交通,鸡犬相闻。其中往来种作,男女衣着,悉如外人。黄发垂髫,并怡然自乐。 见渔人,乃大惊,问所从来。具答之。便要还家,设酒杀鸡作食。村中闻有此人,咸来问讯。自云先世避秦时乱,率妻子邑人来此绝境,不复出焉,遂与外人间隔。问今是何世,乃不知有汉,无论魏晋。此人一一为具言所闻,皆叹惋。余人各复延至其家,皆出酒食。停数日,辞去。此中人语云:“不足为外人道也。”(间隔 一作:隔绝) 既出,得其船,便扶向路,处处志之。及郡下,诣太守,说如此。太守即遣人随其往,寻向所志,遂迷,不复得路。 南阳刘子骥,高尚士也,闻之,欣然规往。未果,寻病终。后遂无问津者。
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<?php
/**
@version v5.20.9 21-Dec-2016
@copyright (c) 2000-2013 John Lim (jlim#natsoft.com). All rights reserved.
@copyright (c) 2014 Damien Regad, Mark Newnham and the ADOdb community
Released under both BSD license and Lesser GPL library license.
Whenever there is any discrepancy between the two licenses,
the BSD license will take precedence.
Set tabs to 4 for best viewing.
*/
// security - hide paths
if (!defined('ADODB_DIR')) die();
class ADODB2_oci8 extends ADODB_DataDict {
var $databaseType = 'oci8';
var $seqField = false;
var $seqPrefix = 'SEQ_';
var $dropTable = "DROP TABLE %s CASCADE CONSTRAINTS";
var $trigPrefix = 'TRIG_';
var $alterCol = ' MODIFY ';
var $typeX = 'VARCHAR(4000)';
var $typeXL = 'CLOB';
function MetaType($t, $len=-1, $fieldobj=false)
{
if (is_object($t)) {
$fieldobj = $t;
$t = $fieldobj->type;
$len = $fieldobj->max_length;
}
switch (strtoupper($t)) {
case 'VARCHAR':
case 'VARCHAR2':
case 'CHAR':
case 'VARBINARY':
case 'BINARY':
if (isset($this) && $len <= $this->blobSize) return 'C';
return 'X';
case 'NCHAR':
case 'NVARCHAR2':
case 'NVARCHAR':
if (isset($this) && $len <= $this->blobSize) return 'C2';
return 'X2';
case 'NCLOB':
case 'CLOB':
return 'XL';
case 'LONG RAW':
case 'LONG VARBINARY':
case 'BLOB':
return 'B';
case 'TIMESTAMP':
return 'TS';
case 'DATE':
return 'T';
case 'INT':
case 'SMALLINT':
case 'INTEGER':
return 'I';
default:
return 'N';
}
}
function ActualType($meta)
{
switch($meta) {
case 'C': return 'VARCHAR';
case 'X': return $this->typeX;
case 'XL': return $this->typeXL;
case 'C2': return 'NVARCHAR2';
case 'X2': return 'NVARCHAR2(4000)';
case 'B': return 'BLOB';
case 'TS':
return 'TIMESTAMP';
case 'D':
case 'T': return 'DATE';
case 'L': return 'NUMBER(1)';
case 'I1': return 'NUMBER(3)';
case 'I2': return 'NUMBER(5)';
case 'I':
case 'I4': return 'NUMBER(10)';
case 'I8': return 'NUMBER(20)';
case 'F': return 'NUMBER';
case 'N': return 'NUMBER';
case 'R': return 'NUMBER(20)';
default:
return $meta;
}
}
function CreateDatabase($dbname, $options=false)
{
$options = $this->_Options($options);
$password = isset($options['PASSWORD']) ? $options['PASSWORD'] : 'tiger';
$tablespace = isset($options["TABLESPACE"]) ? " DEFAULT TABLESPACE ".$options["TABLESPACE"] : '';
$sql[] = "CREATE USER ".$dbname." IDENTIFIED BY ".$password.$tablespace;
$sql[] = "GRANT CREATE SESSION, CREATE TABLE,UNLIMITED TABLESPACE,CREATE SEQUENCE TO $dbname";
return $sql;
}
function AddColumnSQL($tabname, $flds)
{
$tabname = $this->TableName($tabname);
$f = array();
list($lines,$pkey) = $this->_GenFields($flds);
$s = "ALTER TABLE $tabname ADD (";
foreach($lines as $v) {
$f[] = "\n $v";
}
$s .= implode(', ',$f).')';
$sql[] = $s;
return $sql;
}
function AlterColumnSQL($tabname, $flds, $tableflds='', $tableoptions='')
{
$tabname = $this->TableName($tabname);
$f = array();
list($lines,$pkey) = $this->_GenFields($flds);
$s = "ALTER TABLE $tabname MODIFY(";
foreach($lines as $v) {
$f[] = "\n $v";
}
$s .= implode(', ',$f).')';
$sql[] = $s;
return $sql;
}
function DropColumnSQL($tabname, $flds, $tableflds='', $tableoptions='')
{
if (!is_array($flds)) $flds = explode(',',$flds);
foreach ($flds as $k => $v) $flds[$k] = $this->NameQuote($v);
$sql = array();
$s = "ALTER TABLE $tabname DROP(";
$s .= implode(', ',$flds).') CASCADE CONSTRAINTS';
$sql[] = $s;
return $sql;
}
function _DropAutoIncrement($t)
{
if (strpos($t,'.') !== false) {
$tarr = explode('.',$t);
return "drop sequence ".$tarr[0].".seq_".$tarr[1];
}
return "drop sequence seq_".$t;
}
// return string must begin with space
function _CreateSuffix($fname,&$ftype,$fnotnull,$fdefault,$fautoinc,$fconstraint,$funsigned)
{
$suffix = '';
if ($fdefault == "''" && $fnotnull) {// this is null in oracle
$fnotnull = false;
if ($this->debug) ADOConnection::outp("NOT NULL and DEFAULT='' illegal in Oracle");
}
if (strlen($fdefault)) $suffix .= " DEFAULT $fdefault";
if ($fnotnull) $suffix .= ' NOT NULL';
if ($fautoinc) $this->seqField = $fname;
if ($fconstraint) $suffix .= ' '.$fconstraint;
return $suffix;
}
/*
CREATE or replace TRIGGER jaddress_insert
before insert on jaddress
for each row
begin
select seqaddress.nextval into :new.A_ID from dual;
end;
*/
function _Triggers($tabname,$tableoptions)
{
if (!$this->seqField) return array();
if ($this->schema) {
$t = strpos($tabname,'.');
if ($t !== false) $tab = substr($tabname,$t+1);
else $tab = $tabname;
$seqname = $this->schema.'.'.$this->seqPrefix.$tab;
$trigname = $this->schema.'.'.$this->trigPrefix.$this->seqPrefix.$tab;
} else {
$seqname = $this->seqPrefix.$tabname;
$trigname = $this->trigPrefix.$seqname;
}
if (strlen($seqname) > 30) {
$seqname = $this->seqPrefix.uniqid('');
} // end if
if (strlen($trigname) > 30) {
$trigname = $this->trigPrefix.uniqid('');
} // end if
if (isset($tableoptions['REPLACE'])) $sql[] = "DROP SEQUENCE $seqname";
$seqCache = '';
if (isset($tableoptions['SEQUENCE_CACHE'])){$seqCache = $tableoptions['SEQUENCE_CACHE'];}
$seqIncr = '';
if (isset($tableoptions['SEQUENCE_INCREMENT'])){$seqIncr = ' INCREMENT BY '.$tableoptions['SEQUENCE_INCREMENT'];}
$seqStart = '';
if (isset($tableoptions['SEQUENCE_START'])){$seqIncr = ' START WITH '.$tableoptions['SEQUENCE_START'];}
$sql[] = "CREATE SEQUENCE $seqname $seqStart $seqIncr $seqCache";
$sql[] = "CREATE OR REPLACE TRIGGER $trigname BEFORE insert ON $tabname FOR EACH ROW WHEN (NEW.$this->seqField IS NULL OR NEW.$this->seqField = 0) BEGIN select $seqname.nextval into :new.$this->seqField from dual; END;";
$this->seqField = false;
return $sql;
}
/*
CREATE [TEMPORARY] TABLE [IF NOT EXISTS] tbl_name [(create_definition,...)]
[table_options] [select_statement]
create_definition:
col_name type [NOT NULL | NULL] [DEFAULT default_value] [AUTO_INCREMENT]
[PRIMARY KEY] [reference_definition]
or PRIMARY KEY (index_col_name,...)
or KEY [index_name] (index_col_name,...)
or INDEX [index_name] (index_col_name,...)
or UNIQUE [INDEX] [index_name] (index_col_name,...)
or FULLTEXT [INDEX] [index_name] (index_col_name,...)
or [CONSTRAINT symbol] FOREIGN KEY [index_name] (index_col_name,...)
[reference_definition]
or CHECK (expr)
*/
function _IndexSQL($idxname, $tabname, $flds,$idxoptions)
{
$sql = array();
if ( isset($idxoptions['REPLACE']) || isset($idxoptions['DROP']) ) {
$sql[] = sprintf ($this->dropIndex, $idxname, $tabname);
if ( isset($idxoptions['DROP']) )
return $sql;
}
if ( empty ($flds) ) {
return $sql;
}
if (isset($idxoptions['BITMAP'])) {
$unique = ' BITMAP';
} elseif (isset($idxoptions['UNIQUE'])) {
$unique = ' UNIQUE';
} else {
$unique = '';
}
if ( is_array($flds) )
$flds = implode(', ',$flds);
$s = 'CREATE' . $unique . ' INDEX ' . $idxname . ' ON ' . $tabname . ' (' . $flds . ')';
if ( isset($idxoptions[$this->upperName]) )
$s .= $idxoptions[$this->upperName];
if (isset($idxoptions['oci8']))
$s .= $idxoptions['oci8'];
$sql[] = $s;
return $sql;
}
function GetCommentSQL($table,$col)
{
$table = $this->connection->qstr($table);
$col = $this->connection->qstr($col);
return "select comments from USER_COL_COMMENTS where TABLE_NAME=$table and COLUMN_NAME=$col";
}
function SetCommentSQL($table,$col,$cmt)
{
$cmt = $this->connection->qstr($cmt);
return "COMMENT ON COLUMN $table.$col IS $cmt";
}
}