adodb xml schema support

git-svn-id: file:///home/shish/svn/shimmie2/trunk@702 7f39781d-f577-437e-ae19-be835c7a54ca
2008-01-27 15:30:44 +00:00
parent a5af8fecd2
commit 2608bafa41
15 changed files with 5441 additions and 14 deletions
--- a/lib/adodb/datadict/datadict-db2.inc.php
+++ b/lib/adodb/datadict/datadict-db2.inc.php
@ -0,0 +1,143 @@
+<?php
+
+/**
+  V4.94 23 Jan 2007  (c) 2000-2007 John Lim (jlim#natsoft.com.my). All rights reserved.
+  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();
+
+class ADODB2_db2 extends ADODB_DataDict {
+	
+	var $databaseType = 'db2';
+	var $seqField = false;
+	
+ 	function ActualType($meta)
+	{
+		switch($meta) {
+		case 'C': return 'VARCHAR';
+		case 'XL': return 'CLOB';
+		case 'X': return 'VARCHAR(3600)'; 
+
+		case 'C2': return 'VARCHAR'; // up to 32K
+		case 'X2': return 'VARCHAR(3600)'; // up to 32000, but default page size too small
+
+		case 'B': return 'BLOB';
+
+		case 'D': return 'DATE';
+		case 'T': return 'TIMESTAMP';
+
+		case 'L': return 'SMALLINT';
+		case 'I': return 'INTEGER';
+		case 'I1': return 'SMALLINT';
+		case 'I2': return 'SMALLINT';
+		case 'I4': return 'INTEGER';
+		case 'I8': return 'BIGINT';
+
+		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();
+	}
+	
+	
+	function ChangeTableSQL($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;
+	}
+	
+}
+
+
+?>