datadict-mysql.inc.php

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<?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;
    }
}