schema) $tabname = $this->schema.'.'.$tabname;
$f = array();
list($lines,$pkey) = $this->_GenFields($flds);
$s = "ALTER TABLE $tabname $this->addCol";
foreach($lines as $v) {
$f[] = "\n $v";
}
$s .= implode(',',$f);
$sql[] = $s;
return $sql;
}
function AlterColumnSQL($tabname, $flds)
{
if ($this->schema) $tabname = $this->schema.'.'.$tabname;
$sql = array();
list($lines,$pkey) = $this->_GenFields($flds);
foreach($lines as $v) {
$sql[] = "ALTER TABLE $tabname $this->alterCol $v";
}
return $sql;
}
function DropColumnSQL($tabname, $flds)
{
if ($this->schema) $tabname = $this->schema.'.'.$tabname;
if (!is_array($flds)) $flds = explode(',',$flds);
$f = array();
$s = "ALTER TABLE $tabname";
foreach($flds as $v) {
$f[] = "\n$this->dropCol $v";
}
$s .= implode(',',$f);
$sql[] = $s;
return $sql;
}
// return string must begin with space
function _CreateSuffix($fname,$ftype,$fnotnull,$fdefault,$fautoinc,$fconstraint)
{
$suffix = '';
if (strlen($fdefault)) $suffix .= " DEFAULT $fdefault";
if ($fautoinc) $suffix .= ' IDENTITY(1,1)';
if ($fnotnull) $suffix .= ' NOT NULL';
if ($fconstraint) $suffix .= ' '.$fconstraint;
return $suffix;
}
/*
CREATE TABLE
[ database_name.[ owner ] . | owner. ] table_name
( { < column_definition >
| column_name AS computed_column_expression
| < table_constraint > ::= [ CONSTRAINT constraint_name ] }
| [ { PRIMARY KEY | UNIQUE } [ ,...n ]
)
[ ON { filegroup | DEFAULT } ]
[ TEXTIMAGE_ON { filegroup | DEFAULT } ]
< column_definition > ::= { column_name data_type }
[ COLLATE < collation_name > ]
[ [ DEFAULT constant_expression ]
| [ IDENTITY [ ( seed , increment ) [ NOT FOR REPLICATION ] ] ]
]
[ ROWGUIDCOL]
[ < column_constraint > ] [ ...n ]
< column_constraint > ::= [ CONSTRAINT constraint_name ]
{ [ NULL | NOT NULL ]
| [ { PRIMARY KEY | UNIQUE }
[ CLUSTERED | NONCLUSTERED ]
[ WITH FILLFACTOR = fillfactor ]
[ON {filegroup | DEFAULT} ] ]
]
| [ [ FOREIGN KEY ]
REFERENCES ref_table [ ( ref_column ) ]
[ ON DELETE { CASCADE | NO ACTION } ]
[ ON UPDATE { CASCADE | NO ACTION } ]
[ NOT FOR REPLICATION ]
]
| CHECK [ NOT FOR REPLICATION ]
( logical_expression )
}
< table_constraint > ::= [ CONSTRAINT constraint_name ]
{ [ { PRIMARY KEY | UNIQUE }
[ CLUSTERED | NONCLUSTERED ]
{ ( column [ ASC | DESC ] [ ,...n ] ) }
[ WITH FILLFACTOR = fillfactor ]
[ ON { filegroup | DEFAULT } ]
]
| FOREIGN KEY
[ ( column [ ,...n ] ) ]
REFERENCES ref_table [ ( ref_column [ ,...n ] ) ]
[ ON DELETE { CASCADE | NO ACTION } ]
[ ON UPDATE { CASCADE | NO ACTION } ]
[ NOT FOR REPLICATION ]
| CHECK [ NOT FOR REPLICATION ]
( search_conditions )
}
*/
/*
CREATE [ UNIQUE ] [ CLUSTERED | NONCLUSTERED ] INDEX index_name
ON { table | view } ( column [ ASC | DESC ] [ ,...n ] )
[ WITH < index_option > [ ,...n] ]
[ ON filegroup ]
< index_option > :: =
{ PAD_INDEX |
FILLFACTOR = fillfactor |
IGNORE_DUP_KEY |
DROP_EXISTING |
STATISTICS_NORECOMPUTE |
SORT_IN_TEMPDB
}
*/
function _IndexSQL($idxname, $tabname, $flds, $idxoptions)
{
if (isset($idxoptions['REPLACE'])) $sql[] = "DROP INDEX $idxname";
if (isset($idxoptions['UNIQUE'])) $unique = ' UNIQUE';
else $unique = '';
if (is_array($flds)) $flds = implode(', ',$flds);
if (isset($idxoptions['CLUSTERED'])) $clustered = ' CLUSTERED';
else $clustered = '';
$s = "CREATE$unique$clustered INDEX $idxname ON $tabname ($flds)";
if (isset($idxoptions[$this->upperName])) $s .= $idxoptions[$this->upperName];
$sql[] = $s;
return $sql;
}
}
?>
e-REdING. Biblioteca de la Escuela Superior de Ingenieros de Sevilla.
