mirror of
https://github.com/moodle/moodle.git
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331 lines
8.2 KiB
PHP
331 lines
8.2 KiB
PHP
<?php
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/**
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@version v5.21.0 2021-02-27
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@copyright (c) 2000-2013 John Lim (jlim#natsoft.com). All rights reserved.
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@copyright (c) 2014 Damien Regad, Mark Newnham and the ADOdb community
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Released under both BSD license and Lesser GPL library license.
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Whenever there is any discrepancy between the two licenses,
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the BSD license will take precedence.
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Set tabs to 4 for best viewing.
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*/
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// security - hide paths
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if (!defined('ADODB_DIR')) die();
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class ADODB2_oci8 extends ADODB_DataDict {
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var $databaseType = 'oci8';
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var $seqField = false;
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var $seqPrefix = 'SEQ_';
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var $dropTable = "DROP TABLE %s CASCADE CONSTRAINTS";
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var $trigPrefix = 'TRIG_';
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var $alterCol = ' MODIFY ';
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var $typeX = 'VARCHAR(4000)';
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var $typeXL = 'CLOB';
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/**
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* Legacy compatibility for sequence names for emulated auto-increments.
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*
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* If set to true, creates sequences and triggers as TRIG_394545594
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* instead of TRIG_possibly_too_long_tablename
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*
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* @var bool $useCompactAutoIncrements
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*/
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public $useCompactAutoIncrements = false;
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function metaType($t, $len=-1, $fieldobj=false)
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{
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if (is_object($t)) {
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$fieldobj = $t;
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$t = $fieldobj->type;
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$len = $fieldobj->max_length;
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}
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switch (strtoupper($t)) {
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case 'VARCHAR':
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case 'VARCHAR2':
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case 'CHAR':
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case 'VARBINARY':
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case 'BINARY':
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if (isset($this) && $len <= $this->blobSize) return 'C';
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return 'X';
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case 'NCHAR':
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case 'NVARCHAR2':
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case 'NVARCHAR':
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if (isset($this) && $len <= $this->blobSize) return 'C2';
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return 'X2';
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case 'NCLOB':
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case 'CLOB':
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return 'XL';
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case 'LONG RAW':
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case 'LONG VARBINARY':
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case 'BLOB':
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return 'B';
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case 'TIMESTAMP':
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return 'TS';
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case 'DATE':
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return 'T';
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case 'INT':
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case 'SMALLINT':
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case 'INTEGER':
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return 'I';
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default:
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return ADODB_DEFAULT_METATYPE;
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}
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}
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function ActualType($meta)
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{
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switch($meta) {
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case 'C': return 'VARCHAR';
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case 'X': return $this->typeX;
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case 'XL': return $this->typeXL;
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case 'C2': return 'NVARCHAR2';
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case 'X2': return 'NVARCHAR2(4000)';
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case 'B': return 'BLOB';
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case 'TS':
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return 'TIMESTAMP';
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case 'D':
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case 'T': return 'DATE';
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case 'L': return 'NUMBER(1)';
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case 'I1': return 'NUMBER(3)';
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case 'I2': return 'NUMBER(5)';
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case 'I':
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case 'I4': return 'NUMBER(10)';
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case 'I8': return 'NUMBER(20)';
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case 'F': return 'NUMBER';
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case 'N': return 'NUMBER';
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case 'R': return 'NUMBER(20)';
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default:
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return $meta;
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}
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}
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function CreateDatabase($dbname, $options=false)
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{
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$options = $this->_Options($options);
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$password = isset($options['PASSWORD']) ? $options['PASSWORD'] : 'tiger';
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$tablespace = isset($options["TABLESPACE"]) ? " DEFAULT TABLESPACE ".$options["TABLESPACE"] : '';
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$sql[] = "CREATE USER ".$dbname." IDENTIFIED BY ".$password.$tablespace;
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$sql[] = "GRANT CREATE SESSION, CREATE TABLE,UNLIMITED TABLESPACE,CREATE SEQUENCE TO $dbname";
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return $sql;
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}
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function AddColumnSQL($tabname, $flds)
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{
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$tabname = $this->TableName($tabname);
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$f = array();
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list($lines,$pkey) = $this->_GenFields($flds);
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$s = "ALTER TABLE $tabname ADD (";
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foreach($lines as $v) {
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$f[] = "\n $v";
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}
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$s .= implode(', ',$f).')';
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$sql[] = $s;
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return $sql;
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}
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function AlterColumnSQL($tabname, $flds, $tableflds='', $tableoptions='')
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{
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$tabname = $this->TableName($tabname);
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$f = array();
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list($lines,$pkey) = $this->_GenFields($flds);
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$s = "ALTER TABLE $tabname MODIFY(";
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foreach($lines as $v) {
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$f[] = "\n $v";
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}
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$s .= implode(', ',$f).')';
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$sql[] = $s;
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return $sql;
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}
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function DropColumnSQL($tabname, $flds, $tableflds='', $tableoptions='')
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{
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if (!is_array($flds)) $flds = explode(',',$flds);
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foreach ($flds as $k => $v) $flds[$k] = $this->NameQuote($v);
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$sql = array();
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$s = "ALTER TABLE $tabname DROP(";
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$s .= implode(', ',$flds).') CASCADE CONSTRAINTS';
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$sql[] = $s;
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return $sql;
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}
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function _DropAutoIncrement($t)
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{
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if (strpos($t,'.') !== false) {
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$tarr = explode('.',$t);
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return "drop sequence ".$tarr[0].".seq_".$tarr[1];
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}
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return "drop sequence seq_".$t;
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}
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// return string must begin with space
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function _CreateSuffix($fname,&$ftype,$fnotnull,$fdefault,$fautoinc,$fconstraint,$funsigned)
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{
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$suffix = '';
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if ($fdefault == "''" && $fnotnull) {// this is null in oracle
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$fnotnull = false;
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if ($this->debug) ADOConnection::outp("NOT NULL and DEFAULT='' illegal in Oracle");
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}
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if (strlen($fdefault)) $suffix .= " DEFAULT $fdefault";
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if ($fnotnull) $suffix .= ' NOT NULL';
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if ($fautoinc) $this->seqField = $fname;
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if ($fconstraint) $suffix .= ' '.$fconstraint;
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return $suffix;
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}
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/**
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* Creates an insert trigger to emulate an auto-increment column
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* in a table
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*
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* @param string $tabname The name of the table
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* @param string[] $tableoptions Optional configuration items
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*
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* @return string[] The SQL statements to create the trigger
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*/
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function _Triggers($tabname,$tableoptions)
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{
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if (!$this->seqField) return array();
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if ($this->schema)
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{
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$t = strpos($tabname,'.');
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if ($t !== false)
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$tab = substr($tabname,$t+1);
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else
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$tab = $tabname;
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if ($this->connection->useCompactAutoIncrements)
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$id = sprintf('%u',crc32(strtolower($tab)));
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else
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$id = $tab;
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$seqname = $this->schema.'.'.$this->seqPrefix.$tab;
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$trigname = $this->schema.'.'.$this->trigPrefix.$this->seqPrefix.$tab;
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}
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else
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{
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if ($this->connection->useCompactAutoIncrements)
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$id = sprintf('%u',crc32(strtolower($tabname)));
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else
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$id = $tabname;
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$seqname = $this->seqPrefix.$id;
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$trigname = $this->trigPrefix.$id;
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}
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if (strlen($seqname) > 30) {
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$seqname = $this->seqPrefix.uniqid('');
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} // end if
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if (strlen($trigname) > 30) {
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$trigname = $this->trigPrefix.uniqid('');
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} // end if
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if (isset($tableoptions['REPLACE'])) $sql[] = "DROP SEQUENCE $seqname";
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$seqCache = '';
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if (isset($tableoptions['SEQUENCE_CACHE'])){$seqCache = $tableoptions['SEQUENCE_CACHE'];}
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$seqIncr = '';
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if (isset($tableoptions['SEQUENCE_INCREMENT'])){$seqIncr = ' INCREMENT BY '.$tableoptions['SEQUENCE_INCREMENT'];}
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$seqStart = '';
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if (isset($tableoptions['SEQUENCE_START'])){$seqStart = ' START WITH '.$tableoptions['SEQUENCE_START'];}
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$sql[] = "CREATE SEQUENCE $seqname MINVALUE 1 $seqStart $seqIncr $seqCache";
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$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;";
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$this->seqField = false;
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return $sql;
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}
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/*
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CREATE [TEMPORARY] TABLE [IF NOT EXISTS] tbl_name [(create_definition,...)]
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[table_options] [select_statement]
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create_definition:
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col_name type [NOT NULL | NULL] [DEFAULT default_value] [AUTO_INCREMENT]
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[PRIMARY KEY] [reference_definition]
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or PRIMARY KEY (index_col_name,...)
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or KEY [index_name] (index_col_name,...)
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or INDEX [index_name] (index_col_name,...)
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or UNIQUE [INDEX] [index_name] (index_col_name,...)
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or FULLTEXT [INDEX] [index_name] (index_col_name,...)
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or [CONSTRAINT symbol] FOREIGN KEY [index_name] (index_col_name,...)
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[reference_definition]
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or CHECK (expr)
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*/
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function _IndexSQL($idxname, $tabname, $flds,$idxoptions)
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{
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$sql = array();
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if ( isset($idxoptions['REPLACE']) || isset($idxoptions['DROP']) ) {
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$sql[] = sprintf ($this->dropIndex, $idxname, $tabname);
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if ( isset($idxoptions['DROP']) )
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return $sql;
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}
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if ( empty ($flds) ) {
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return $sql;
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}
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if (isset($idxoptions['BITMAP'])) {
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$unique = ' BITMAP';
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} elseif (isset($idxoptions['UNIQUE'])) {
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$unique = ' UNIQUE';
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} else {
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$unique = '';
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}
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if ( is_array($flds) )
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$flds = implode(', ',$flds);
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$s = 'CREATE' . $unique . ' INDEX ' . $idxname . ' ON ' . $tabname . ' (' . $flds . ')';
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if ( isset($idxoptions[$this->upperName]) )
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$s .= $idxoptions[$this->upperName];
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if (isset($idxoptions['oci8']))
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$s .= $idxoptions['oci8'];
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$sql[] = $s;
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return $sql;
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}
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function GetCommentSQL($table,$col)
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{
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$table = $this->connection->qstr($table);
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$col = $this->connection->qstr($col);
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return "select comments from USER_COL_COMMENTS where TABLE_NAME=$table and COLUMN_NAME=$col";
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}
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function SetCommentSQL($table,$col,$cmt)
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{
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$cmt = $this->connection->qstr($cmt);
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return "COMMENT ON COLUMN $table.$col IS $cmt";
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}
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}
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