Proyectos de Subversion Moodle

<?php
/**
 * Data Dictionary for Oracle (oci8)
 *
 * This file is part of ADOdb, a Database Abstraction Layer library for PHP.
 *
 * @package ADOdb
 * @link https://adodb.org Project's web site and documentation
 * @link https://github.com/ADOdb/ADOdb Source code and issue tracker
 *
 * The ADOdb Library is dual-licensed, released under both the BSD 3-Clause
 * and the GNU Lesser General Public Licence (LGPL) v2.1 or, at your option,
 * any later version. This means you can use it in proprietary products.
 * See the LICENSE.md file distributed with this source code for details.
 * @license BSD-3-Clause
 * @license LGPL-2.1-or-later
 *
 * @copyright 2000-2013 John Lim
 * @copyright 2014 Damien Regad, Mark Newnham and the ADOdb community
 */

// 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';
        
        /**
         * Legacy compatibility for sequence names for emulated auto-increments.
         *
         * If set to true, creates sequences and triggers as TRIG_394545594
         * instead of TRIG_possibly_too_long_tablename
         *
         * @var bool $useCompactAutoIncrements
         */
        public $useCompactAutoIncrements = false;

        function metaType($t, $len=-1, $fieldobj=false)
        {
                if (is_object($t)) {
                        $fieldobj = $t;
                        $t = $fieldobj->type;
                        $len = $fieldobj->max_length;
                }
                
                $t = strtoupper($t);
                
                if (array_key_exists($t,$this->connection->customActualTypes))
                        return  $this->connection->customActualTypes[$t];

                switch ($t) {
                case 'VARCHAR':
                case 'VARCHAR2':
                case 'CHAR':
                case 'VARBINARY':
                case 'BINARY':
                        if (isset($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 ADODB_DEFAULT_METATYPE;
                }
        }

        function ActualType($meta)
        {
                $meta = strtoupper($meta);
                
                /*
                * Add support for custom meta types. We do this
                * first, that allows us to override existing types
                */
                if (isset($this->connection->customMetaTypes[$meta]))
                        return $this->connection->customMetaTypes[$meta]['actual'];
                
                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;
        }

        /**
         * Creates an insert trigger to emulate an auto-increment column
         * in a table
         *
         * @param string   $tabname       The name of the table
         * @param string[] $tableoptions  Optional configuration items
         *
         * @return string[] The SQL statements to create the trigger
         */
        function _Triggers($tabname,$tableoptions)
        {
                
                if (!$this->seqField) return array();

                if ($this->schema) 
                {
                        $t = strpos($tabname,'.');
                        if ($t !== false) 
                                $tab = substr($tabname,$t+1);
                        else 
                                $tab = $tabname;
                        
                        if ($this->connection->useCompactAutoIncrements)
                                $id = sprintf('%u',crc32(strtolower($tab)));
                        else
                                $id = $tab;
                        
                        $seqname = $this->schema.'.'.$this->seqPrefix.$tab;
                        $trigname = $this->schema.'.'.$this->trigPrefix.$this->seqPrefix.$tab;
                        
                } 
                else 
                {
                        if ($this->connection->useCompactAutoIncrements)
                                $id = sprintf('%u',crc32(strtolower($tabname)));
                        else
                                $id = $tabname;
                        
                        $seqname = $this->seqPrefix.$id;
                        $trigname = $this->trigPrefix.$id;
                }

                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'])){$seqStart = ' START WITH '.$tableoptions['SEQUENCE_START'];}
                $sql[] = "CREATE SEQUENCE $seqname MINVALUE 1 $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";
        }
}