1 | <?php |
---|
2 | |
---|
3 | /** |
---|
4 | V4.94 23 Jan 2007 (c) 2000-2007 John Lim (jlim#natsoft.com.my). All rights reserved. |
---|
5 | Released under both BSD license and Lesser GPL library license. |
---|
6 | Whenever there is any discrepancy between the two licenses, |
---|
7 | the BSD license will take precedence. |
---|
8 | |
---|
9 | Set tabs to 4 for best viewing. |
---|
10 | |
---|
11 | */ |
---|
12 | // security - hide paths |
---|
13 | if (!defined('ADODB_DIR')) die(); |
---|
14 | |
---|
15 | class ADODB2_db2 extends ADODB_DataDict { |
---|
16 | |
---|
17 | var $databaseType = 'db2'; |
---|
18 | var $seqField = false; |
---|
19 | |
---|
20 | function ActualType($meta) |
---|
21 | { |
---|
22 | switch($meta) { |
---|
23 | case 'C': return 'VARCHAR'; |
---|
24 | case 'XL': return 'CLOB'; |
---|
25 | case 'X': return 'VARCHAR(3600)'; |
---|
26 | |
---|
27 | case 'C2': return 'VARCHAR'; // up to 32K |
---|
28 | case 'X2': return 'VARCHAR(3600)'; // up to 32000, but default page size too small |
---|
29 | |
---|
30 | case 'B': return 'BLOB'; |
---|
31 | |
---|
32 | case 'D': return 'DATE'; |
---|
33 | case 'T': return 'TIMESTAMP'; |
---|
34 | |
---|
35 | case 'L': return 'SMALLINT'; |
---|
36 | case 'I': return 'INTEGER'; |
---|
37 | case 'I1': return 'SMALLINT'; |
---|
38 | case 'I2': return 'SMALLINT'; |
---|
39 | case 'I4': return 'INTEGER'; |
---|
40 | case 'I8': return 'BIGINT'; |
---|
41 | |
---|
42 | case 'F': return 'DOUBLE'; |
---|
43 | case 'N': return 'DECIMAL'; |
---|
44 | default: |
---|
45 | return $meta; |
---|
46 | } |
---|
47 | } |
---|
48 | |
---|
49 | // return string must begin with space |
---|
50 | function _CreateSuffix($fname,$ftype,$fnotnull,$fdefault,$fautoinc,$fconstraint) |
---|
51 | { |
---|
52 | $suffix = ''; |
---|
53 | if ($fautoinc) return ' GENERATED ALWAYS AS IDENTITY'; # as identity start with |
---|
54 | if (strlen($fdefault)) $suffix .= " DEFAULT $fdefault"; |
---|
55 | if ($fnotnull) $suffix .= ' NOT NULL'; |
---|
56 | if ($fconstraint) $suffix .= ' '.$fconstraint; |
---|
57 | return $suffix; |
---|
58 | } |
---|
59 | |
---|
60 | function AlterColumnSQL($tabname, $flds) |
---|
61 | { |
---|
62 | if ($this->debug) ADOConnection::outp("AlterColumnSQL not supported"); |
---|
63 | return array(); |
---|
64 | } |
---|
65 | |
---|
66 | |
---|
67 | function DropColumnSQL($tabname, $flds) |
---|
68 | { |
---|
69 | if ($this->debug) ADOConnection::outp("DropColumnSQL not supported"); |
---|
70 | return array(); |
---|
71 | } |
---|
72 | |
---|
73 | |
---|
74 | function ChangeTableSQL($tablename, $flds, $tableoptions = false) |
---|
75 | { |
---|
76 | |
---|
77 | /** |
---|
78 | Allow basic table changes to DB2 databases |
---|
79 | DB2 will fatally reject changes to non character columns |
---|
80 | |
---|
81 | */ |
---|
82 | |
---|
83 | $validTypes = array("CHAR","VARC"); |
---|
84 | $invalidTypes = array("BIGI","BLOB","CLOB","DATE", "DECI","DOUB", "INTE", "REAL","SMAL", "TIME"); |
---|
85 | // check table exists |
---|
86 | $cols = &$this->MetaColumns($tablename); |
---|
87 | if ( empty($cols)) { |
---|
88 | return $this->CreateTableSQL($tablename, $flds, $tableoptions); |
---|
89 | } |
---|
90 | |
---|
91 | // already exists, alter table instead |
---|
92 | list($lines,$pkey) = $this->_GenFields($flds); |
---|
93 | $alter = 'ALTER TABLE ' . $this->TableName($tablename); |
---|
94 | $sql = array(); |
---|
95 | |
---|
96 | foreach ( $lines as $id => $v ) { |
---|
97 | if ( isset($cols[$id]) && is_object($cols[$id]) ) { |
---|
98 | /** |
---|
99 | If the first field of $v is the fieldname, and |
---|
100 | the second is the field type/size, we assume its an |
---|
101 | attempt to modify the column size, so check that it is allowed |
---|
102 | $v can have an indeterminate number of blanks between the |
---|
103 | fields, so account for that too |
---|
104 | */ |
---|
105 | $vargs = explode(' ' , $v); |
---|
106 | // assume that $vargs[0] is the field name. |
---|
107 | $i=0; |
---|
108 | // Find the next non-blank value; |
---|
109 | for ($i=1;$i<sizeof($vargs);$i++) |
---|
110 | if ($vargs[$i] != '') |
---|
111 | break; |
---|
112 | |
---|
113 | // if $vargs[$i] is one of the following, we are trying to change the |
---|
114 | // size of the field, if not allowed, simply ignore the request. |
---|
115 | if (in_array(substr($vargs[$i],0,4),$invalidTypes)) |
---|
116 | continue; |
---|
117 | // insert the appropriate DB2 syntax |
---|
118 | if (in_array(substr($vargs[$i],0,4),$validTypes)) { |
---|
119 | array_splice($vargs,$i,0,array('SET','DATA','TYPE')); |
---|
120 | } |
---|
121 | |
---|
122 | // Now Look for the NOT NULL statement as this is not allowed in |
---|
123 | // the ALTER table statement. If it is in there, remove it |
---|
124 | if (in_array('NOT',$vargs) && in_array('NULL',$vargs)) { |
---|
125 | for ($i=1;$i<sizeof($vargs);$i++) |
---|
126 | if ($vargs[$i] == 'NOT') |
---|
127 | break; |
---|
128 | array_splice($vargs,$i,2,''); |
---|
129 | } |
---|
130 | $v = implode(' ',$vargs); |
---|
131 | $sql[] = $alter . $this->alterCol . ' ' . $v; |
---|
132 | } else { |
---|
133 | $sql[] = $alter . $this->addCol . ' ' . $v; |
---|
134 | } |
---|
135 | } |
---|
136 | |
---|
137 | return $sql; |
---|
138 | } |
---|
139 | |
---|
140 | } |
---|
141 | |
---|
142 | |
---|
143 | ?> |
---|