datadict/datadict-mysql.inc.php

<?php

// security - hide paths
if (!defined('ADODB_DIR')) die();

class ADODB2_mysql extends ADODB_DataDict {
        var $databaseType = 'mysql';
        var $alterCol = ' MODIFY COLUMN';
        var $alterTableAddIndex = true;
        var $dropTable = 'DROP TABLE IF EXISTS %s'; // requires mysql 3.22 or later
        
        var $dropIndex = 'DROP INDEX %s ON %s';
        var $renameColumn = 'ALTER TABLE %s CHANGE COLUMN %s %s %s';    // needs column-definition!
        
        function MetaType($t,$len=-1,$fieldobj=false)
        {
                if (is_object($t)) {
                        $fieldobj = $t;
                        $t = $fieldobj->type;
                        $len = $fieldobj->max_length;
                }
                $is_serial = is_object($fieldobj) && $fieldobj->primary_key && $fieldobj->auto_increment;
                
                $len = -1; // mysql max_length is not accurate
                switch (strtoupper($t)) {
                case 'STRING': 
                case 'CHAR':
                case 'VARCHAR': 
                case 'TINYBLOB': 
                case 'TINYTEXT': 
                case 'ENUM': 
                case 'SET':
                        if ($len <= $this->blobSize) return 'C';
                        
                case 'TEXT':
                case 'LONGTEXT': 
                case 'MEDIUMTEXT':
                        return 'X';
                        
                // php_mysql extension always returns 'blob' even if 'text'
                // so we have to check whether binary...
                case 'IMAGE':
                case 'LONGBLOB': 
                case 'BLOB':
                case 'MEDIUMBLOB':
                        return !empty($fieldobj->binary) ? 'B' : 'X';
                        
                case 'YEAR':
                case 'DATE': return 'D';
                
                case 'TIME':
                case 'DATETIME':
                case 'TIMESTAMP': return 'T';
                
                case 'FLOAT':
                case 'DOUBLE':
                        return 'F';
                        
                case 'INT': 
                case 'INTEGER': return $is_serial ? 'R' : 'I';
                case 'TINYINT': return $is_serial ? 'R' : 'I1';
                case 'SMALLINT': return $is_serial ? 'R' : 'I2';
                case 'MEDIUMINT': return $is_serial ? 'R' : 'I4';
                case 'BIGINT':  return $is_serial ? 'R' : 'I8';
                default: return 'N';
                }
        }

        function ActualType($meta)
        {
                switch(strtoupper($meta)) {
                case 'C': return 'VARCHAR';
                case 'XL':return 'LONGTEXT';
                case 'X': return 'TEXT';
                
                case 'C2': return 'VARCHAR';
                case 'X2': return 'LONGTEXT';
                
                case 'B': return 'LONGBLOB';
                        
                case 'D': return 'DATE';
                case 'TS':
                case 'T': return 'DATETIME';
                case 'L': return 'TINYINT';
                
                case 'R':
                case 'I4':
                case 'I': return 'INTEGER';
                case 'I1': return 'TINYINT';
                case 'I2': return 'SMALLINT';
                case 'I8': return 'BIGINT';
                
                case 'F': return 'DOUBLE';
                case 'N': return 'NUMERIC';
                default:
                        return $meta;
                }
        }
        
        // return string must begin with space
        function _CreateSuffix($fname,&$ftype,$fnotnull,$fdefault,$fautoinc,$fconstraint,$funsigned)
        {       
                $suffix = '';
                if ($funsigned) $suffix .= ' UNSIGNED';
                if ($fnotnull) $suffix .= ' NOT NULL';
                if (strlen($fdefault)) $suffix .= " DEFAULT $fdefault";
                if ($fautoinc) $suffix .= ' AUTO_INCREMENT';
                if ($fconstraint) $suffix .= ' '.$fconstraint;
                return $suffix;
        }
        
        /*
        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)
        */
        
        /*
        CREATE [UNIQUE|FULLTEXT] INDEX index_name
                ON tbl_name (col_name[(length)],... )
        */
        
        function _IndexSQL($idxname, $tabname, $flds, $idxoptions)
        {
                $sql = array();
                
                if ( isset($idxoptions['REPLACE']) || isset($idxoptions['DROP']) ) {
                        if ($this->alterTableAddIndex) $sql[] = "ALTER TABLE $tabname DROP INDEX $idxname";
                        else $sql[] = sprintf($this->dropIndex, $idxname, $tabname);

                        if ( isset($idxoptions['DROP']) )
                                return $sql;
                }
                
                if ( empty ($flds) ) {
                        return $sql;
                }
                
                if (isset($idxoptions['FULLTEXT'])) {
                        $unique = ' FULLTEXT';
                } elseif (isset($idxoptions['UNIQUE'])) {
                        $unique = ' UNIQUE';
                } else {
                        $unique = '';
                }
                
                if ( is_array($flds) ) $flds = implode(', ',$flds);
                
                if ($this->alterTableAddIndex) $s = "ALTER TABLE $tabname ADD $unique INDEX $idxname ";
                else $s = 'CREATE' . $unique . ' INDEX ' . $idxname . ' ON ' . $tabname;
                
                $s .= ' (' . $flds . ')';
                
                if ( isset($idxoptions[$this->upperName]) )
                        $s .= $idxoptions[$this->upperName];
                
                $sql[] = $s;
                
                return $sql;
        }
}
?>