Öffentliche Methoden | |
| ActualType ($meta) | |
| _CreateSuffix ($fname, &$ftype, $fnotnull, $fdefault, $fautoinc, $fconstraint, $funsigned) | |
| AlterColumnSQL ($tabname, $flds) | |
| DropColumnSQL ($tabname, $flds) | |
| ChangeTableSQL ($tablename, $flds, $tableoptions=false) | |
Datenfelder | |
| $databaseType = 'db2' | |
| $seqField = false | |
Ausführliche Beschreibung
Definiert in Zeile 15 der Datei datadict-db2.inc.php.
Dokumentation der Elementfunktionen
| ActualType | ( | $ | meta | ) |
Returns the actual type given a character code.
C: varchar X: CLOB (character large object) or largest varchar size if CLOB is not supported C2: Multibyte varchar X2: Multibyte CLOB
B: BLOB (binary large object)
D: Date T: Date-time L: Integer field suitable for storing booleans (0 or 1) I: Integer F: Floating point number N: Numeric or decimal number
Erneute Implementation von ADODB_DataDict.
Definiert in Zeile 20 der Datei datadict-db2.inc.php.
{
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 'TS':
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;
}
}
| ChangeTableSQL | ( | $ | tablename, |
| $ | flds, | ||
| $ | tableoptions = false |
||
| ) |
Allow basic table changes to DB2 databases DB2 will fatally reject changes to non character columns
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
Definiert in Zeile 75 der Datei datadict-db2.inc.php.
{
$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]) ) {
$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;
}
Die Dokumentation für diese Klasse wurde erzeugt aufgrund der Datei:
- datadict/datadict-db2.inc.php
