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   1  <?php
   2  
   3  /*
   4  @version   v5.20.3  01-Jan-2016
   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    Set tabs to 8.
  11  
  12  */
  13  
  14  class ADODB_pdo_pgsql extends ADODB_pdo {
  15      var $metaDatabasesSQL = "select datname from pg_database where datname not in ('template0','template1') order by 1";
  16      var $metaTablesSQL = "select tablename,'T' from pg_tables where tablename not like 'pg\_%'
  17      and tablename not in ('sql_features', 'sql_implementation_info', 'sql_languages',
  18       'sql_packages', 'sql_sizing', 'sql_sizing_profiles')
  19      union
  20          select viewname,'V' from pg_views where viewname not like 'pg\_%'";
  21      //"select tablename from pg_tables where tablename not like 'pg_%' order by 1";
  22      var $isoDates = true; // accepts dates in ISO format
  23      var $sysDate = "CURRENT_DATE";
  24      var $sysTimeStamp = "CURRENT_TIMESTAMP";
  25      var $blobEncodeType = 'C';
  26      var $metaColumnsSQL = "SELECT a.attname,t.typname,a.attlen,a.atttypmod,a.attnotnull,a.atthasdef,a.attnum
  27          FROM pg_class c, pg_attribute a,pg_type t
  28          WHERE relkind in ('r','v') AND (c.relname='%s' or c.relname = lower('%s')) and a.attname not like '....%%'
  29  AND a.attnum > 0 AND a.atttypid = t.oid AND a.attrelid = c.oid ORDER BY a.attnum";
  30  
  31      // used when schema defined
  32      var $metaColumnsSQL1 = "SELECT a.attname, t.typname, a.attlen, a.atttypmod, a.attnotnull, a.atthasdef, a.attnum
  33  FROM pg_class c, pg_attribute a, pg_type t, pg_namespace n
  34  WHERE relkind in ('r','v') AND (c.relname='%s' or c.relname = lower('%s'))
  35   and c.relnamespace=n.oid and n.nspname='%s'
  36      and a.attname not like '....%%' AND a.attnum > 0
  37      AND a.atttypid = t.oid AND a.attrelid = c.oid ORDER BY a.attnum";
  38  
  39      // get primary key etc -- from Freek Dijkstra
  40      var $metaKeySQL = "SELECT ic.relname AS index_name, a.attname AS column_name,i.indisunique AS unique_key, i.indisprimary AS primary_key
  41      FROM pg_class bc, pg_class ic, pg_index i, pg_attribute a WHERE bc.oid = i.indrelid AND ic.oid = i.indexrelid AND (i.indkey[0] = a.attnum OR i.indkey[1] = a.attnum OR i.indkey[2] = a.attnum OR i.indkey[3] = a.attnum OR i.indkey[4] = a.attnum OR i.indkey[5] = a.attnum OR i.indkey[6] = a.attnum OR i.indkey[7] = a.attnum) AND a.attrelid = bc.oid AND bc.relname = '%s'";
  42  
  43      var $hasAffectedRows = true;
  44      var $hasLimit = false;    // set to true for pgsql 7 only. support pgsql/mysql SELECT * FROM TABLE LIMIT 10
  45      // below suggested by Freek Dijkstra
  46      var $true = 't';        // string that represents TRUE for a database
  47      var $false = 'f';        // string that represents FALSE for a database
  48      var $fmtDate = "'Y-m-d'";    // used by DBDate() as the default date format used by the database
  49      var $fmtTimeStamp = "'Y-m-d G:i:s'"; // used by DBTimeStamp as the default timestamp fmt.
  50      var $hasMoveFirst = true;
  51      var $hasGenID = true;
  52      var $_genIDSQL = "SELECT NEXTVAL('%s')";
  53      var $_genSeqSQL = "CREATE SEQUENCE %s START %s";
  54      var $_dropSeqSQL = "DROP SEQUENCE %s";
  55      var $metaDefaultsSQL = "SELECT d.adnum as num, d.adsrc as def from pg_attrdef d, pg_class c where d.adrelid=c.oid and c.relname='%s' order by d.adnum";
  56      var $random = 'random()';        /// random function
  57      var $concat_operator='||';
  58  
  59  	function _init($parentDriver)
  60      {
  61  
  62          $parentDriver->hasTransactions = false; ## <<< BUG IN PDO pgsql driver
  63          $parentDriver->hasInsertID = true;
  64          $parentDriver->_nestedSQL = true;
  65      }
  66  
  67  	function ServerInfo()
  68      {
  69          $arr['description'] = ADOConnection::GetOne("select version()");
  70          $arr['version'] = ADOConnection::_findvers($arr['description']);
  71          return $arr;
  72      }
  73  
  74  	function SelectLimit($sql,$nrows=-1,$offset=-1,$inputarr=false,$secs2cache=0)
  75      {
  76           $offsetStr = ($offset >= 0) ? " OFFSET $offset" : '';
  77           $limitStr  = ($nrows >= 0)  ? " LIMIT $nrows" : '';
  78           if ($secs2cache)
  79                $rs = $this->CacheExecute($secs2cache,$sql."$limitStr$offsetStr",$inputarr);
  80           else
  81                $rs = $this->Execute($sql."$limitStr$offsetStr",$inputarr);
  82  
  83          return $rs;
  84      }
  85  
  86  	function MetaTables($ttype=false,$showSchema=false,$mask=false)
  87      {
  88          $info = $this->ServerInfo();
  89          if ($info['version'] >= 7.3) {
  90              $this->metaTablesSQL = "select tablename,'T' from pg_tables where tablename not like 'pg\_%'
  91                and schemaname  not in ( 'pg_catalog','information_schema')
  92      union
  93          select viewname,'V' from pg_views where viewname not like 'pg\_%'  and schemaname  not in ( 'pg_catalog','information_schema') ";
  94          }
  95          if ($mask) {
  96              $save = $this->metaTablesSQL;
  97              $mask = $this->qstr(strtolower($mask));
  98              if ($info['version']>=7.3)
  99                  $this->metaTablesSQL = "
 100  select tablename,'T' from pg_tables where tablename like $mask and schemaname not in ( 'pg_catalog','information_schema')
 101   union
 102  select viewname,'V' from pg_views where viewname like $mask and schemaname  not in ( 'pg_catalog','information_schema')  ";
 103              else
 104                  $this->metaTablesSQL = "
 105  select tablename,'T' from pg_tables where tablename like $mask
 106   union
 107  select viewname,'V' from pg_views where viewname like $mask";
 108          }
 109          $ret = ADOConnection::MetaTables($ttype,$showSchema);
 110  
 111          if ($mask) {
 112              $this->metaTablesSQL = $save;
 113          }
 114          return $ret;
 115      }
 116  
 117  	function MetaColumns($table,$normalize=true)
 118      {
 119      global $ADODB_FETCH_MODE;
 120  
 121          $schema = false;
 122          $this->_findschema($table,$schema);
 123  
 124          if ($normalize) $table = strtolower($table);
 125  
 126          $save = $ADODB_FETCH_MODE;
 127          $ADODB_FETCH_MODE = ADODB_FETCH_NUM;
 128          if ($this->fetchMode !== false) $savem = $this->SetFetchMode(false);
 129  
 130          if ($schema) $rs = $this->Execute(sprintf($this->metaColumnsSQL1,$table,$table,$schema));
 131          else $rs = $this->Execute(sprintf($this->metaColumnsSQL,$table,$table));
 132          if (isset($savem)) $this->SetFetchMode($savem);
 133          $ADODB_FETCH_MODE = $save;
 134  
 135          if ($rs === false) {
 136              $false = false;
 137              return $false;
 138          }
 139          if (!empty($this->metaKeySQL)) {
 140              // If we want the primary keys, we have to issue a separate query
 141              // Of course, a modified version of the metaColumnsSQL query using a
 142              // LEFT JOIN would have been much more elegant, but postgres does
 143              // not support OUTER JOINS. So here is the clumsy way.
 144  
 145              $ADODB_FETCH_MODE = ADODB_FETCH_ASSOC;
 146  
 147              $rskey = $this->Execute(sprintf($this->metaKeySQL,($table)));
 148              // fetch all result in once for performance.
 149              $keys = $rskey->GetArray();
 150              if (isset($savem)) $this->SetFetchMode($savem);
 151              $ADODB_FETCH_MODE = $save;
 152  
 153              $rskey->Close();
 154              unset($rskey);
 155          }
 156  
 157          $rsdefa = array();
 158          if (!empty($this->metaDefaultsSQL)) {
 159              $ADODB_FETCH_MODE = ADODB_FETCH_ASSOC;
 160              $sql = sprintf($this->metaDefaultsSQL, ($table));
 161              $rsdef = $this->Execute($sql);
 162              if (isset($savem)) $this->SetFetchMode($savem);
 163              $ADODB_FETCH_MODE = $save;
 164  
 165              if ($rsdef) {
 166                  while (!$rsdef->EOF) {
 167                      $num = $rsdef->fields['num'];
 168                      $s = $rsdef->fields['def'];
 169                      if (strpos($s,'::')===false && substr($s, 0, 1) == "'") { /* quoted strings hack... for now... fixme */
 170                          $s = substr($s, 1);
 171                          $s = substr($s, 0, strlen($s) - 1);
 172                      }
 173  
 174                      $rsdefa[$num] = $s;
 175                      $rsdef->MoveNext();
 176                  }
 177              } else {
 178                  ADOConnection::outp( "==> SQL => " . $sql);
 179              }
 180              unset($rsdef);
 181          }
 182  
 183          $retarr = array();
 184          while (!$rs->EOF) {
 185              $fld = new ADOFieldObject();
 186              $fld->name = $rs->fields[0];
 187              $fld->type = $rs->fields[1];
 188              $fld->max_length = $rs->fields[2];
 189              if ($fld->max_length <= 0) $fld->max_length = $rs->fields[3]-4;
 190              if ($fld->max_length <= 0) $fld->max_length = -1;
 191              if ($fld->type == 'numeric') {
 192                  $fld->scale = $fld->max_length & 0xFFFF;
 193                  $fld->max_length >>= 16;
 194              }
 195              // dannym
 196              // 5 hasdefault; 6 num-of-column
 197              $fld->has_default = ($rs->fields[5] == 't');
 198              if ($fld->has_default) {
 199                  $fld->default_value = $rsdefa[$rs->fields[6]];
 200              }
 201  
 202              //Freek
 203              if ($rs->fields[4] == $this->true) {
 204                  $fld->not_null = true;
 205              }
 206  
 207              // Freek
 208              if (is_array($keys)) {
 209                  foreach($keys as $key) {
 210                      if ($fld->name == $key['column_name'] AND $key['primary_key'] == $this->true)
 211                          $fld->primary_key = true;
 212                      if ($fld->name == $key['column_name'] AND $key['unique_key'] == $this->true)
 213                          $fld->unique = true; // What name is more compatible?
 214                  }
 215              }
 216  
 217              if ($ADODB_FETCH_MODE == ADODB_FETCH_NUM) $retarr[] = $fld;
 218              else $retarr[($normalize) ? strtoupper($fld->name) : $fld->name] = $fld;
 219  
 220              $rs->MoveNext();
 221          }
 222          $rs->Close();
 223          if (empty($retarr)) {
 224              $false = false;
 225              return $false;
 226          } else return $retarr;
 227  
 228      }
 229  
 230  }