[6779] | 1 | <?php |
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| 2 | |
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| 3 | /** |
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| 4 | V4.94 23 Jan 2007 (c) 2000-2007 John Lim (jlim#natsoft.com.my). All rights reserved. |
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| 5 | Released under both BSD license and Lesser GPL library license. |
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| 6 | Whenever there is any discrepancy between the two licenses, |
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| 7 | the BSD license will take precedence. |
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| 8 | |
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| 9 | Set tabs to 4 for best viewing. |
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| 10 | |
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| 11 | */ |
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| 12 | // security - hide paths |
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| 13 | if (!defined('ADODB_DIR')) die(); |
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| 14 | |
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| 15 | class ADODB2_db2 extends ADODB_DataDict { |
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| 16 | |
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| 17 | var $databaseType = 'db2'; |
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| 18 | var $seqField = false; |
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| 19 | |
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| 20 | function ActualType($meta) |
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| 21 | { |
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| 22 | switch($meta) { |
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| 23 | case 'C': return 'VARCHAR'; |
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| 24 | case 'XL': return 'CLOB'; |
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| 25 | case 'X': return 'VARCHAR(3600)'; |
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| 26 | |
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| 27 | case 'C2': return 'VARCHAR'; // up to 32K |
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| 28 | case 'X2': return 'VARCHAR(3600)'; // up to 32000, but default page size too small |
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| 29 | |
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| 30 | case 'B': return 'BLOB'; |
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| 31 | |
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| 32 | case 'D': return 'DATE'; |
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| 33 | case 'T': return 'TIMESTAMP'; |
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| 34 | |
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| 35 | case 'L': return 'SMALLINT'; |
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| 36 | case 'I': return 'INTEGER'; |
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| 37 | case 'I1': return 'SMALLINT'; |
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| 38 | case 'I2': return 'SMALLINT'; |
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| 39 | case 'I4': return 'INTEGER'; |
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| 40 | case 'I8': return 'BIGINT'; |
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| 41 | |
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| 42 | case 'F': return 'DOUBLE'; |
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| 43 | case 'N': return 'DECIMAL'; |
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| 44 | default: |
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| 45 | return $meta; |
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| 46 | } |
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| 47 | } |
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| 48 | |
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| 49 | // return string must begin with space |
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| 50 | function _CreateSuffix($fname,$ftype,$fnotnull,$fdefault,$fautoinc,$fconstraint) |
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| 51 | { |
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| 52 | $suffix = ''; |
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| 53 | if ($fautoinc) return ' GENERATED ALWAYS AS IDENTITY'; # as identity start with |
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| 54 | if (strlen($fdefault)) $suffix .= " DEFAULT $fdefault"; |
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| 55 | if ($fnotnull) $suffix .= ' NOT NULL'; |
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| 56 | if ($fconstraint) $suffix .= ' '.$fconstraint; |
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| 57 | return $suffix; |
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| 58 | } |
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| 59 | |
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| 60 | function AlterColumnSQL($tabname, $flds) |
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| 61 | { |
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| 62 | if ($this->debug) ADOConnection::outp("AlterColumnSQL not supported"); |
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| 63 | return array(); |
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| 64 | } |
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| 65 | |
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| 66 | |
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| 67 | function DropColumnSQL($tabname, $flds) |
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| 68 | { |
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| 69 | if ($this->debug) ADOConnection::outp("DropColumnSQL not supported"); |
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| 70 | return array(); |
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| 71 | } |
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| 72 | |
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| 73 | |
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| 74 | function ChangeTableSQL($tablename, $flds, $tableoptions = false) |
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| 75 | { |
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| 76 | |
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| 77 | /** |
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| 78 | Allow basic table changes to DB2 databases |
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| 79 | DB2 will fatally reject changes to non character columns |
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| 80 | |
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| 81 | */ |
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| 82 | |
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| 83 | $validTypes = array("CHAR","VARC"); |
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| 84 | $invalidTypes = array("BIGI","BLOB","CLOB","DATE", "DECI","DOUB", "INTE", "REAL","SMAL", "TIME"); |
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| 85 | // check table exists |
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| 86 | $cols = &$this->MetaColumns($tablename); |
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| 87 | if ( empty($cols)) { |
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| 88 | return $this->CreateTableSQL($tablename, $flds, $tableoptions); |
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| 89 | } |
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| 90 | |
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| 91 | // already exists, alter table instead |
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| 92 | list($lines,$pkey) = $this->_GenFields($flds); |
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| 93 | $alter = 'ALTER TABLE ' . $this->TableName($tablename); |
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| 94 | $sql = array(); |
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| 95 | |
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| 96 | foreach ( $lines as $id => $v ) { |
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| 97 | if ( isset($cols[$id]) && is_object($cols[$id]) ) { |
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| 98 | /** |
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| 99 | If the first field of $v is the fieldname, and |
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| 100 | the second is the field type/size, we assume its an |
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| 101 | attempt to modify the column size, so check that it is allowed |
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| 102 | $v can have an indeterminate number of blanks between the |
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| 103 | fields, so account for that too |
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| 104 | */ |
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| 105 | $vargs = explode(' ' , $v); |
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| 106 | // assume that $vargs[0] is the field name. |
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| 107 | $i=0; |
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| 108 | // Find the next non-blank value; |
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| 109 | for ($i=1;$i<sizeof($vargs);$i++) |
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| 110 | if ($vargs[$i] != '') |
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| 111 | break; |
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| 112 | |
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| 113 | // if $vargs[$i] is one of the following, we are trying to change the |
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| 114 | // size of the field, if not allowed, simply ignore the request. |
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| 115 | if (in_array(substr($vargs[$i],0,4),$invalidTypes)) |
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| 116 | continue; |
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| 117 | // insert the appropriate DB2 syntax |
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| 118 | if (in_array(substr($vargs[$i],0,4),$validTypes)) { |
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| 119 | array_splice($vargs,$i,0,array('SET','DATA','TYPE')); |
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| 120 | } |
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| 121 | |
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| 122 | // Now Look for the NOT NULL statement as this is not allowed in |
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| 123 | // the ALTER table statement. If it is in there, remove it |
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| 124 | if (in_array('NOT',$vargs) && in_array('NULL',$vargs)) { |
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| 125 | for ($i=1;$i<sizeof($vargs);$i++) |
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| 126 | if ($vargs[$i] == 'NOT') |
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| 127 | break; |
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| 128 | array_splice($vargs,$i,2,''); |
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| 129 | } |
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| 130 | $v = implode(' ',$vargs); |
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| 131 | $sql[] = $alter . $this->alterCol . ' ' . $v; |
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| 132 | } else { |
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| 133 | $sql[] = $alter . $this->addCol . ' ' . $v; |
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| 134 | } |
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| 135 | } |
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| 136 | |
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| 137 | return $sql; |
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| 138 | } |
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| 139 | |
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| 140 | } |
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| 141 | |
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| 142 | |
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| 143 | ?> |
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