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egroupware/phpgwapi/inc/class.schema_proc_pgsql.inc.php

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<?php
/**************************************************************************\
* phpGroupWare - Setup *
* http://www.phpgroupware.org *
* SQL for table properties taken from phpPgAdmin Version 2.2.1 *
* http://www.greatbridge.org/project/phppgadmin *
* Copyright (C) 1999-2000 Dan Wilson <phpPgAdmin@acucore.com> *
* Copyright (C) 1998-1999 Tobias Ratschiller <tobias@dnet.it> *
* -------------------------------------------- *
* This file written by Michael Dean<mdean@users.sourceforge.net> *
* and Miles Lott<milosch@phpgroupware.org> *
* -------------------------------------------- *
* This program is free software; you can redistribute it and/or modify it *
* under the terms of the GNU General Public License as published by the *
* Free Software Foundation; either version 2 of the License, or (at your *
* option) any later version. *
\**************************************************************************/
/* $Id$ */
class schema_proc_pgsql
{
var $m_sStatementTerminator;
/* Following added to convert sql to array */
var $sCol = array();
var $pk = array();
var $fk = array();
var $ix = array();
var $uc = array();
function schema_proc_pgsql()
{
$this->m_sStatementTerminator = ';';
}
/* Return a type suitable for DDL */
function TranslateType($sType, $iPrecision = 0, $iScale = 0)
{
switch($sType)
{
case 'auto':
$sTranslated = 'int4';
break;
case 'blob':
$sTranslated = 'text';
break;
case 'char':
if ($iPrecision > 0 && $iPrecision < 256)
{
$sTranslated = sprintf("char(%d)", $iPrecision);
}
if ($iPrecision > 255)
{
$sTranslated = 'text';
}
break;
case 'date':
$sTranslated = 'date';
break;
case 'decimal':
$sTranslated = sprintf("decimal(%d,%d)", $iPrecision, $iScale);
break;
case 'float':
if ($iPrecision == 4 || $iPrecision == 8)
{
$sTranslated = sprintf("float%d", $iPrecision);
}
break;
case 'int':
if ($iPrecision == 2 || $iPrecision == 4 || $iPrecision == 8)
{
$sTranslated = sprintf("int%d", $iPrecision);
}
break;
case 'longtext':
$sTranslated = 'text';
break;
case 'text':
$sTranslated = 'text';
break;
case 'timestamp':
$sTranslated = 'timestamp';
break;
case 'varchar':
if ($iPrecision > 0 && $iPrecision < 256)
{
$sTranslated = sprintf("varchar(%d)", $iPrecision);
}
if ($iPrecision > 255)
{
$sTranslated = 'text';
}
break;
}
return $sTranslated;
}
function TranslateDefault($sDefault)
{
switch ($sDefault)
{
case 'current_date':
case 'current_timestamp':
return 'now';
}
return $sDefault;
}
/* Inverse of above, convert sql column types to array info */
function rTranslateType($sType, $iPrecision = 0, $iScale = 0)
{
$sTranslated = '';
switch($sType)
{
case 'serial':
$sTranslated = "'type' => 'auto'";
break;
case 'int2':
$sTranslated = "'type' => 'int', 'precision' => 2";
break;
case 'int4':
$sTranslated = "'type' => 'int', 'precision' => 4";
break;
case 'int8':
$sTranslated = "'type' => 'int', 'precision' => 8";
break;
case 'bpchar':
case 'char':
if ($iPrecision > 0 && $iPrecision < 256)
{
$sTranslated = "'type' => 'char', 'precision' => $iPrecision";
}
if ($iPrecision > 255)
{
$sTranslated = "'type' => 'text'";
}
break;
case 'numeric':
/* Borrowed from phpPgAdmin */
$iPrecision = ($iScale >> 16) & 0xffff;
$iScale = ($iScale - 4) & 0xffff;
$sTranslated = "'type' => 'decimal', 'precision' => $iPrecision, 'scale' => $iScale";
break;
case 'float':
case 'float4':
case 'float8':
case 'double':
$sTranslated = "'type' => 'float', 'precision' => $iPrecision";
break;
case 'datetime':
case 'timestamp':
$sTranslated = "'type' => 'timestamp'";
break;
case 'varchar':
if ($iPrecision > 0 && $iPrecision < 256)
{
$sTranslated = "'type' => 'varchar', 'precision' => $iPrecision";
}
if ($iPrecision > 255)
{
$sTranslated = "'type' => 'text'";
}
break;
case 'text':
case 'blob':
case 'date':
$sTranslated = "'type' => '$sType'";
break;
}
return $sTranslated;
}
function GetPKSQL($sFields)
{
return "PRIMARY KEY($sFields)";
}
function GetUCSQL($sFields)
{
return "UNIQUE($sFields)";
}
function _GetColumns($oProc, $sTableName, &$sColumns, $sDropColumn = '', $sAlteredColumn = '', $sAlteredColumnType = '')
{
$sdb = $oProc->m_odb;
$sdc = $oProc->m_odb;
$sColumns = '';
$this->pk = array();
$this->fk = array();
$this->ix = array();
$this->uc = array();
$query = "SELECT a.attname,a.attnum FROM pg_attribute a,pg_class b WHERE ";
$query .= "b.oid=a.attrelid AND a.attnum>0 and b.relname='$sTableName'";
if ($sDropColumn != '')
{
$query .= " AND a.attname != '$sDropColumn'";
}
$query .= ' ORDER BY a.attnum';
$oProc->m_odb->query($query);
while ($oProc->m_odb->next_record())
{
if ($sColumns != '')
{
$sColumns .= ',';
}
$sFieldName = $oProc->m_odb->f(0);
$sColumns .= $sFieldName;
if ($sAlteredColumn == $sFieldName && $sAlteredColumnType != '')
{
$sColumns .= '::' . $sAlteredColumnType;
}
}
//$qdefault = "SELECT substring(d.adsrc for 128) FROM pg_attrdef d, pg_class c "
// . "WHERE c.relname = $sTableName AND c.oid = d.adrelid AND d.adnum =" . $oProc->m_odb->f(1);
$sql_get_fields = "
SELECT
a.attnum,
a.attname AS field,
t.typname AS type,
a.attlen AS length,
a.atttypmod AS lengthvar,
a.attnotnull AS notnull
FROM
pg_class c,
pg_attribute a,
pg_type t
WHERE
c.relname = '$sTableName'
and a.attnum > 0
and a.attrelid = c.oid
and a.atttypid = t.oid
ORDER BY a.attnum";
/* attnum field type length lengthvar notnull(Yes/No) */
$sdb->query($sql_get_fields);
while ($sdb->next_record())
{
$colnum = $sdb->f(0);
$colname = $sdb->f(1);
if ($sdb->f(5) == 'Yes')
{
$null = "'nullable' => True";
}
else
{
$null = "'nullable' => False";
}
if ($sdb->f(2) == 'numeric')
{
$prec = $sdb->f(3);
$scale = $sdb->f(4);
}
elseif ($sdb->f(3) > 0)
{
$prec = $sdb->f(3);
$scale = 0;
}
elseif ($sdb->f(4) > 0)
{
$prec = $sdb->f(4) - 4;
$scale = 0;
}
else
{
$prec = 0;
$scale = 0;
}
$type = $this->rTranslateType($sdb->f(2), $prec, $scale);
$sql_get_default = "
SELECT d.adsrc AS rowdefault
FROM pg_attrdef d, pg_class c
WHERE
c.relname = '$sTableName' AND
c.oid = d.adrelid AND
d.adnum = $colnum
";
$sdc->query($sql_get_default);
$sdc->next_record();
if ($sdc->f(0))
{
if (ereg('nextval',$sdc->f(0)))
{
$default = '';
$nullcomma = '';
}
else
{
$default = "'default' => '".$sdc->f(0)."'";
$nullcomma = ',';
}
}
else
{
$default = '';
$nullcomma = '';
}
$default = ereg_replace("''","'",$default);
$this->sCol[] = "\t\t\t\t'" . $colname . "' => array(" . $type . ',' . $null . $nullcomma . $default . '),' . "\n";
}
$sql_pri_keys = "
SELECT
ic.relname AS index_name,
bc.relname AS tab_name,
ta.attname AS column_name,
i.indisunique AS unique_key,
i.indisprimary AS primary_key
FROM
pg_class bc,
pg_class ic,
pg_index i,
pg_attribute ta,
pg_attribute ia
WHERE
bc.oid = i.indrelid
AND ic.oid = i.indexrelid
AND ia.attrelid = i.indexrelid
AND ta.attrelid = bc.oid
AND bc.relname = '$sTableName'
AND ta.attrelid = i.indrelid
AND ta.attnum = i.indkey[ia.attnum-1]
ORDER BY
index_name, tab_name, column_name";
$sdc->query($sql_pri_keys);
while ($sdc->next_record())
{
//echo '<br> checking: ' . $sdc->f(4);
if ($sdc->f(4) == 't')
{
$this->pk[] = $sdc->f(2);
}
if ($sdc->f(3) == 't')
{
$this->uc[] = $sdc->f(2);
}
}
/* ugly as heck, but is here to chop the trailing comma on the last element (for php3) */
$this->sCol[count($this->sCol) - 1] = substr($this->sCol[count($this->sCol) - 1],0,-2) . "\n";
return false;
}
function _CopyAlteredTable($oProc, &$aTables, $sSource, $sDest)
{
$oDB = $oProc->m_odb;
$oProc->m_odb->query("select * from $sSource");
while ($oProc->m_odb->next_record())
{
$sSQL = "INSERT INTO $sDest (";
$i=0;
@reset($aTables[$sDest]['fd']);
while (list($name,$arraydef) = each($aTables[$sDest]['fd']))
{
if ($i > 0)
{
$sSQL .= ',';
}
$sSQL .= $name;
$i++;
}
$sSQL .= ') VALUES (';
@reset($aTables[$sDest]['fd']);
$i=0;
while (list($name,$arraydef) = each($aTables[$sDest]['fd']))
{
if ($i > 0)
{
$sSQL .= ',';
}
if ($oProc->m_odb->f($name) != null)
{
switch ($arraydef['type'])
{
case 'blob':
case 'char':
case 'date':
case 'text':
case 'timestamp':
case 'varchar':
$sSQL .= "'" . $oProc->m_odb->db_addslashes($oProc->m_odb->f($name)) . "'";
break;
default:
$sSQL .= intval($oProc->m_odb->f($name));
}
}
else
{
$sSQL .= 'null';
}
$i++;
}
$sSQL .= ')';
$oDB->query($sSQL);
}
return true;
}
function GetSequenceForTable($oProc,$table,&$sSequenceName)
{
global $DEBUG;
if($DEBUG) { echo '<br>GetSequenceForTable: ' . $table; }
$oProc->m_odb->query("SELECT relname FROM pg_class WHERE NOT relname ~ 'pg_.*' AND relname LIKE 'seq_$table' AND relkind='S' ORDER BY relname",__LINE__,__FILE__);
$oProc->m_odb->next_record();
if ($oProc->m_odb->f('relname'))
{
$sSequenceName = $oProc->m_odb->f('relname');
}
return True;
}
function GetSequenceFieldForTable($oProc,$table,&$sField)
{
global $DEBUG;
if($DEBUG) { echo '<br>GetSequenceFieldForTable: You rang?'; }
$oProc->m_odb->query("SELECT a.attname FROM pg_attribute a, pg_class c, pg_attrdef d WHERE c.relname='$table' AND c.oid=d.adrelid AND d.adsrc LIKE '%seq_$table%' AND a.attrelid=c.oid AND d.adnum=a.attnum");
$oProc->m_odb->next_record();
if ($oProc->m_odb->f('attname'))
{
$sField = $oProc->m_odb->f('attname');
}
return True;
}
function DropSequenceForTable($oProc,$table)
{
global $DEBUG;
if($DEBUG) { echo '<br>DropSequenceForTable: ' . $table; }
$this->GetSequenceForTable($oProc,$table,$sSequenceName);
if ($sSequenceName)
{
$oProc->m_odb->query("DROP SEQUENCE " . $sSequenceName,__LINE__,__FILE__);
}
return True;
}
function DropTable($oProc, &$aTables, $sTableName)
{
$this->DropSequenceForTable($oProc,$sTableName);
return $oProc->m_odb->query("DROP TABLE " . $sTableName) &&
$this->DropSequenceForTable($oProc, $sTableName);
}
function DropColumn($oProc, &$aTables, $sTableName, $aNewTableDef, $sColumnName, $bCopyData = true)
{
if ($bCopyData)
{
$oProc->m_odb->query("SELECT * INTO $sTableName" . "_tmp FROM $sTableName");
}
$this->DropTable($oProc, $aTables, $sTableName);
$oProc->_GetTableSQL($sTableName, $aNewTableDef, $sTableSQL, $sSequenceSQL);
if($sSequenceSQL)
{
$oProc->m_odb->query($sSequenceSQL);
}
$query = "CREATE TABLE $sTableName ($sTableSQL)";
if (!$bCopyData)
{
return !!($oProc->m_odb->query($query));
}
$oProc->m_odb->query($query);
$this->_GetColumns($oProc, $sTableName . '_tmp', $sColumns, $sColumnName);
$query = "INSERT INTO $sTableName SELECT $sColumns FROM $sTableName" . '_tmp';
$bRet = !!($oProc->m_odb->query($query));
return ($bRet && $this->DropTable($oProc, $aTables, $sTableName . '_tmp'));
}
function RenameTable($oProc, &$aTables, $sOldTableName, $sNewTableName)
{
global $DEBUG;
if ($DEBUG) { echo '<br>RenameTable(): Fetching old sequence for: ' . $sOldTableName; }
$this->GetSequenceForTable($oProc,$sOldTableName,$sSequenceName);
if ($DEBUG) { echo ' - ' . $sSequenceName; }
if ($DEBUG) { echo '<br>RenameTable(): Fetching sequence field for: ' . $sOldTableName; }
$this->GetSequenceFieldForTable($oProc,$sOldTableName,$sField);
if ($DEBUG) { echo ' - ' . $sField; }
if ($sSequenceName)
{
$oProc->m_odb->query("SELECT last_value FROM seq_$sOldTableName",__LINE__,__FILE__);
$oProc->m_odb->next_record();
$lastval = $oProc->m_odb->f(0);
if ($DEBUG) { echo '<br>RenameTable(): dropping old sequence: ' . $sSequenceName . ' used on field: ' . $sField; }
$this->DropSequenceForTable($oProc,$sOldTableName);
if ($lastval)
{
$lastval = ' start ' . $lastval;
}
$this->GetSequenceSQL($sNewTableName,$sSequenceSQL);
if ($DEBUG) { echo '<br>RenameTable(): Making new sequence using: ' . $sSequenceSQL . $lastval; }
$oProc->m_odb->query($sSequenceSQL . $lastval,__LINE__,__FILE__);
if ($DEBUG) { echo '<br>RenameTable(): Altering column default for: ' . $sField; }
$oProc->m_odb->query("ALTER TABLE $sOldTableName ALTER $sField SET DEFAULT nextval('seq_" . $sNewTableName . "')",__LINE__,__FILE__);
}
$indexnames = $oProc->m_odb->index_names();
while(list($key,$val) = @each($indexnames))
{
$indexes[] = $val['index_name'];
}
if(!in_array($sOldTableName . '_pkey',$indexes)) // no idea how this can happen
{
$oProc->m_odb->query("DROP INDEX " . $sOldTableName . "_pkey",__LINE__,__FILE__);
}
else // rename the index
{
$oProc->m_odb->query('ALTER TABLE '.$sOldTableName.'_pkey RENAME TO '.$sNewTableName.'_pkey');
}
return !!($oProc->m_odb->query("ALTER TABLE $sOldTableName RENAME TO $sNewTableName"));
}
function RenameColumn($oProc, &$aTables, $sTableName, $sOldColumnName, $sNewColumnName, $bCopyData = true)
{
/*
This really needs testing - it can affect primary keys, and other table-related objects
like sequences and such
*/
if ($bCopyData)
{
$oProc->m_odb->query("SELECT * INTO $sTableName" . "_tmp FROM $sTableName");
}
$this->DropTable($oProc, $aTables, $sTableName);
if (!$bCopyData)
{
return $this->CreateTable($oProc, $aTables, $sTableName, $oProc->m_aTables[$sTableName], false);
}
$this->CreateTable($oProc, $aTables, $sTableName, $aTables[$sTableName], True);
$this->_GetColumns($oProc, $sTableName . "_tmp", $sColumns);
$query = "INSERT INTO $sTableName SELECT $sColumns FROM $sTableName" . "_tmp";
$bRet = !!($oProc->m_odb->query($query));
return ($bRet && $this->DropTable($oProc, $aTables, $sTableName . "_tmp"));
}
function AlterColumn($oProc, &$aTables, $sTableName, $sColumnName, &$aColumnDef, $bCopyData = true)
{
if ($bCopyData)
{
$oProc->m_odb->query("SELECT * INTO $sTableName" . "_tmp FROM $sTableName");
}
$this->DropTable($oProc, $aTables, $sTableName);
if (!$bCopyData)
{
return $this->CreateTable($oProc, $aTables, $sTableName, $aTables[$sTableName], True);
}
$this->CreateTable($oProc, $aTables, $sTableName, $aTables[$sTableName], True);
$this->_GetColumns($oProc, $sTableName . "_tmp", $sColumns, '', $sColumnName, $aColumnDef['type'] == 'auto' ? 'int4' : $aColumnDef['type']);
/*
TODO: analyze the type of change and determine if this is used or _CopyAlteredTable
this is a performance consideration only, _CopyAlteredTable should be safe
$query = "INSERT INTO $sTableName SELECT $sColumns FROM $sTableName" . "_tmp";
$bRet = !!($oProc->m_odb->query($query));
*/
$bRet = $this->_CopyAlteredTable($oProc, $aTables, $sTableName . '_tmp', $sTableName);
return ($bRet && $this->DropTable($oProc, $aTables, $sTableName . "_tmp"));
}
function AddColumn($oProc, &$aTables, $sTableName, $sColumnName, &$aColumnDef)
{
if (isset($aColumnDef['default'])) // pgsql cant add a colum with a default
{
$default = $aColumnDef['default'];
unset($aColumnDef['default']);
}
if (isset($aColumnDef['nullable']) && !$aColumnDef['nullable']) // pgsql cant add a column not nullable
{
$notnull = !$aColumnDef['nullable'];
unset($aColumnDef['nullable']);
}
$oProc->_GetFieldSQL($aColumnDef, $sFieldSQL);
$query = "ALTER TABLE $sTableName ADD COLUMN $sColumnName $sFieldSQL";
if (($Ok = !!($oProc->m_odb->query($query))) && isset($default))
{
$query = "ALTER TABLE $sTableName ALTER COLUMN $sColumnName SET DEFAULT '$default';\n";
$query .= "UPDATE $sTableName SET $sColumnName='$default';\n";
$Ok = !!($oProc->m_odb->query($query));
if ($OK && $notnull)
{
// unfortunally this is pgSQL >= 7.3
//$query .= "ALTER TABLE $sTableName ALTER COLUMN $sColumnName SET NOT NULL;\n";
//$Ok = !!($oProc->m_odb->query($query));
// so we do it the slow way
AlterColumn($oProc, $aTables, $sTableName, $sColumnName, $aColumnDef);
}
}
return $Ok;
}
function GetSequenceSQL($sTableName, &$sSequenceSQL)
{
$sSequenceSQL = sprintf("CREATE SEQUENCE seq_%s", $sTableName);
return true;
}
function CreateTable($oProc, $aTables, $sTableName, $aTableDef, $bCreateSequence = true)
{
global $DEBUG;
if ($oProc->_GetTableSQL($sTableName, $aTableDef, $sTableSQL, $sSequenceSQL))
{
/* create sequence first since it will be needed for default */
if ($bCreateSequence && $sSequenceSQL != '')
{
if ($DEBUG) { echo '<br>Making sequence using: ' . $sSequenceSQL; }
$oProc->m_odb->query($sSequenceSQL);
}
$query = "CREATE TABLE $sTableName ($sTableSQL)";
return !!($oProc->m_odb->query($query));
}
return false;
}
}
?>
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