egroupware/phpgwapi/inc/adodb/datadict/datadict-db2.inc.php

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<?php
/**
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V4.65 22 July 2005 (c) 2000-2005 John Lim (jlim@natsoft.com.my). All rights reserved.
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Released under both BSD license and Lesser GPL library license.
Whenever there is any discrepancy between the two licenses,
the BSD license will take precedence.
Set tabs to 4 for best viewing.
*/
// security - hide paths
if (!defined('ADODB_DIR')) die();
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class ADODB2_db2 extends ADODB_DataDict {
var $databaseType = 'db2';
var $seqField = false;
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function ActualType($meta)
{
switch($meta) {
case 'C': return 'VARCHAR';
case 'XL': return 'CLOB';
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case 'X': return 'VARCHAR(3600)';
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case 'C2': return 'VARCHAR'; // up to 32K
case 'X2': return 'VARCHAR(3600)'; // up to 32000, but default page size too small
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case 'B': return 'BLOB';
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case 'D': return 'DATE';
case 'T': return 'TIMESTAMP';
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case 'L': return 'SMALLINT';
case 'I': return 'INTEGER';
case 'I1': return 'SMALLINT';
case 'I2': return 'SMALLINT';
case 'I4': return 'INTEGER';
case 'I8': return 'BIGINT';
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case 'F': return 'DOUBLE';
case 'N': return 'DECIMAL';
default:
return $meta;
}
}
// return string must begin with space
function _CreateSuffix($fname,$ftype,$fnotnull,$fdefault,$fautoinc,$fconstraint)
{
$suffix = '';
if ($fautoinc) return ' GENERATED ALWAYS AS IDENTITY'; # as identity start with
if (strlen($fdefault)) $suffix .= " DEFAULT $fdefault";
if ($fnotnull) $suffix .= ' NOT NULL';
if ($fconstraint) $suffix .= ' '.$fconstraint;
return $suffix;
}
function AlterColumnSQL($tabname, $flds)
{
if ($this->debug) ADOConnection::outp("AlterColumnSQL not supported");
return array();
}
function DropColumnSQL($tabname, $flds)
{
if ($this->debug) ADOConnection::outp("DropColumnSQL not supported");
return array();
}
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function xChangeTableSQL($tablename, $flds, $tableoptions = false)
{
/**
Allow basic table changes to DB2 databases
DB2 will fatally reject changes to non character columns
*/
$validTypes = array("CHAR","VARC");
$invalidTypes = array("BIGI","BLOB","CLOB","DATE", "DECI","DOUB", "INTE", "REAL","SMAL", "TIME");
// check table exists
$cols = &$this->MetaColumns($tablename);
if ( empty($cols)) {
return $this->CreateTableSQL($tablename, $flds, $tableoptions);
}
// already exists, alter table instead
list($lines,$pkey) = $this->_GenFields($flds);
$alter = 'ALTER TABLE ' . $this->TableName($tablename);
$sql = array();
foreach ( $lines as $id => $v ) {
if ( isset($cols[$id]) && is_object($cols[$id]) ) {
/**
If the first field of $v is the fieldname, and
the second is the field type/size, we assume its an
attempt to modify the column size, so check that it is allowed
$v can have an indeterminate number of blanks between the
fields, so account for that too
*/
$vargs = explode(' ' , $v);
// assume that $vargs[0] is the field name.
$i=0;
// Find the next non-blank value;
for ($i=1;$i<sizeof($vargs);$i++)
if ($vargs[$i] != '')
break;
// if $vargs[$i] is one of the following, we are trying to change the
// size of the field, if not allowed, simply ignore the request.
if (in_array(substr($vargs[$i],0,4),$invalidTypes))
continue;
// insert the appropriate DB2 syntax
if (in_array(substr($vargs[$i],0,4),$validTypes)) {
array_splice($vargs,$i,0,array('SET','DATA','TYPE'));
}
// Now Look for the NOT NULL statement as this is not allowed in
// the ALTER table statement. If it is in there, remove it
if (in_array('NOT',$vargs) && in_array('NULL',$vargs)) {
for ($i=1;$i<sizeof($vargs);$i++)
if ($vargs[$i] == 'NOT')
break;
array_splice($vargs,$i,2,'');
}
$v = implode(' ',$vargs);
$sql[] = $alter . $this->alterCol . ' ' . $v;
} else {
$sql[] = $alter . $this->addCol . ' ' . $v;
}
}
return $sql;
}
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}
?>