lib/adodb/datadict/datadict-mysql.inc.php

   1 <?php
   2
   3 /**
   4   @version   v5.21.0  2021-02-27
   5   @copyright (c) 2000-2013 John Lim (jlim#natsoft.com). All rights reserved.
   6   @copyright (c) 2014      Damien Regad, Mark Newnham and the ADOdb community
   7   Released under both BSD license and Lesser GPL library license.
   8   Whenever there is any discrepancy between the two licenses,
   9   the BSD license will take precedence.
  10
  11   Set tabs to 4 for best viewing.
  12
  13 */
  14
  15 // security - hide paths
  16 if (!defined('ADODB_DIR')) die();
  17
  18 class ADODB2_mysql extends ADODB_DataDict {
  19         var $databaseType = 'mysql';
  20         var $alterCol = ' MODIFY COLUMN';
  21         var $alterTableAddIndex = true;
  22         var $dropTable = 'DROP TABLE IF EXISTS %s'; // requires mysql 3.22 or later
  23
  24         var $dropIndex = 'DROP INDEX %s ON %s';
  25         var $renameColumn = 'ALTER TABLE %s CHANGE COLUMN %s %s %s';    // needs column-definition!
  26
  27         public $blobAllowsNotNull = true;
  28
  29         function MetaType($t,$len=-1,$fieldobj=false)
  30         {
  31
  32                 if (is_object($t)) {
  33                         $fieldobj = $t;
  34                         $t = $fieldobj->type;
  35                         $len = $fieldobj->max_length;
  36                 }
  37                 $is_serial = is_object($fieldobj) && $fieldobj->primary_key && $fieldobj->auto_increment;
  38
  39                 $len = -1; // mysql max_length is not accurate
  40                 switch (strtoupper($t)) {
  41                 case 'STRING':
  42                 case 'CHAR':
  43                 case 'VARCHAR':
  44                 case 'TINYBLOB':
  45                 case 'TINYTEXT':
  46                 case 'ENUM':
  47                 case 'SET':
  48                         if ($len <= $this->blobSize) return 'C';
  49
  50                 case 'TEXT':
  51                 case 'LONGTEXT':
  52                 case 'MEDIUMTEXT':
  53                         return 'X';
  54
  55                 // php_mysql extension always returns 'blob' even if 'text'
  56                 // so we have to check whether binary...
  57                 case 'IMAGE':
  58                 case 'LONGBLOB':
  59                 case 'BLOB':
  60                 case 'MEDIUMBLOB':
  61                         return !empty($fieldobj->binary) ? 'B' : 'X';
  62
  63                 case 'YEAR':
  64                 case 'DATE': return 'D';
  65
  66                 case 'TIME':
  67                 case 'DATETIME':
  68                 case 'TIMESTAMP': return 'T';
  69
  70                 case 'FLOAT':
  71                 case 'DOUBLE':
  72                         return 'F';
  73
  74                 case 'INT':
  75                 case 'INTEGER': return $is_serial ? 'R' : 'I';
  76                 case 'TINYINT': return $is_serial ? 'R' : 'I1';
  77                 case 'SMALLINT': return $is_serial ? 'R' : 'I2';
  78                 case 'MEDIUMINT': return $is_serial ? 'R' : 'I4';
  79                 case 'BIGINT':  return $is_serial ? 'R' : 'I8';
  80                 default: return ADODB_DEFAULT_METATYPE;
  81                 }
  82         }
  83
  84         function ActualType($meta)
  85         {
  86                 switch(strtoupper($meta)) {
  87                 case 'C': return 'VARCHAR';
  88                 case 'XL':return 'LONGTEXT';
  89                 case 'X': return 'TEXT';
  90
  91                 case 'C2': return 'VARCHAR';
  92                 case 'X2': return 'LONGTEXT';
  93
  94                 case 'B': return 'LONGBLOB';
  95
  96                 case 'D': return 'DATE';
  97                 case 'TS':
  98                 case 'T': return 'DATETIME';
  99                 case 'L': return 'TINYINT';
 100
 101                 case 'R':
 102                 case 'I4':
 103                 case 'I': return 'INTEGER';
 104                 case 'I1': return 'TINYINT';
 105                 case 'I2': return 'SMALLINT';
 106                 case 'I8': return 'BIGINT';
 107
 108                 case 'F': return 'DOUBLE';
 109                 case 'N': return 'NUMERIC';
 110                 default:
 111                         return $meta;
 112                 }
 113         }
 114
 115         // return string must begin with space
 116         function _CreateSuffix($fname,&$ftype,$fnotnull,$fdefault,$fautoinc,$fconstraint,$funsigned)
 117         {
 118                 $suffix = '';
 119                 if ($funsigned) $suffix .= ' UNSIGNED';
 120                 if ($fnotnull) $suffix .= ' NOT NULL';
 121                 if (strlen($fdefault)) $suffix .= " DEFAULT $fdefault";
 122                 if ($fautoinc) $suffix .= ' AUTO_INCREMENT';
 123                 if ($fconstraint) $suffix .= ' '.$fconstraint;
 124                 return $suffix;
 125         }
 126
 127         /*
 128         CREATE [TEMPORARY] TABLE [IF NOT EXISTS] tbl_name [(create_definition,...)]
 129                 [table_options] [select_statement]
 130                 create_definition:
 131                 col_name type [NOT NULL | NULL] [DEFAULT default_value] [AUTO_INCREMENT]
 132                 [PRIMARY KEY] [reference_definition]
 133                 or PRIMARY KEY (index_col_name,...)
 134                 or KEY [index_name] (index_col_name,...)
 135                 or INDEX [index_name] (index_col_name,...)
 136                 or UNIQUE [INDEX] [index_name] (index_col_name,...)
 137                 or FULLTEXT [INDEX] [index_name] (index_col_name,...)
 138                 or [CONSTRAINT symbol] FOREIGN KEY [index_name] (index_col_name,...)
 139                 [reference_definition]
 140                 or CHECK (expr)
 141         */
 142
 143         /*
 144         CREATE [UNIQUE|FULLTEXT] INDEX index_name
 145                 ON tbl_name (col_name[(length)],... )
 146         */
 147
 148         function _IndexSQL($idxname, $tabname, $flds, $idxoptions)
 149         {
 150                 $sql = array();
 151
 152                 if ( isset($idxoptions['REPLACE']) || isset($idxoptions['DROP']) ) {
 153                         if ($this->alterTableAddIndex) $sql[] = "ALTER TABLE $tabname DROP INDEX $idxname";
 154                         else $sql[] = sprintf($this->dropIndex, $idxname, $tabname);
 155
 156                         if ( isset($idxoptions['DROP']) )
 157                                 return $sql;
 158                 }
 159
 160                 if ( empty ($flds) ) {
 161                         return $sql;
 162                 }
 163
 164                 if (isset($idxoptions['FULLTEXT'])) {
 165                         $unique = ' FULLTEXT';
 166                 } elseif (isset($idxoptions['UNIQUE'])) {
 167                         $unique = ' UNIQUE';
 168                 } else {
 169                         $unique = '';
 170                 }
 171
 172                 if ( is_array($flds) ) $flds = implode(', ',$flds);
 173
 174                 if ($this->alterTableAddIndex) $s = "ALTER TABLE $tabname ADD $unique INDEX $idxname ";
 175                 else $s = 'CREATE' . $unique . ' INDEX ' . $idxname . ' ON ' . $tabname;
 176
 177                 $s .= ' (' . $flds . ')';
 178
 179                 if ( isset($idxoptions[$this->upperName]) )
 180                         $s .= $idxoptions[$this->upperName];
 181
 182                 $sql[] = $s;
 183
 184                 return $sql;
 185         }
 186 }