1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
|
<?php
/**
* TMssqlMetaData class file.
*
* @author Wei Zhuo <weizhuo[at]gmail[dot]com>
* @link http://www.pradosoft.com/
* @copyright Copyright © 2005-2012 PradoSoft
* @license http://www.pradosoft.com/license/
* @version $Id: TPgsqlMetaData.php 1866 2007-04-14 05:02:29Z wei $
* @package System.Data.Common.Mssql
*/
/**
* Load the base TDbMetaData class.
*/
Prado::using('System.Data.Common.TDbMetaData');
Prado::using('System.Data.Common.Mssql.TMssqlTableInfo');
/**
* TMssqlMetaData loads MSSQL database table and column information.
*
* @author Wei Zhuo <weizho[at]gmail[dot]com>
* @version $Id: TPgsqlMetaData.php 1866 2007-04-14 05:02:29Z wei $
* @package System.Data.Common.Mssql
* @since 3.1
*/
class TMssqlMetaData extends TDbMetaData
{
/**
* @return string TDbTableInfo class name.
*/
protected function getTableInfoClass()
{
return 'TMssqlTableInfo';
}
/**
* Quotes a table name for use in a query.
* @param string $name table name
* @return string the properly quoted table name
*/
public function quoteTableName($name)
{
return parent::quoteTableName($name, '[', ']');
}
/**
* Quotes a column name for use in a query.
* @param string $name column name
* @return string the properly quoted column name
*/
public function quoteColumnName($name)
{
return parent::quoteColumnName($name, '[', ']');
}
/**
* Quotes a column alias for use in a query.
* @param string $name column alias
* @return string the properly quoted column alias
*/
public function quoteColumnAlias($name)
{
return parent::quoteColumnAlias($name, '"', '"');
}
/**
* Get the column definitions for given table.
* @param string table name.
* @return TMssqlTableInfo table information.
*/
protected function createTableInfo($table)
{
list($catalogName,$schemaName,$tableName) = $this->getCatalogSchemaTableName($table);
$this->getDbConnection()->setActive(true);
$sql = <<<EOD
SELECT t.*,
c.*,
columnproperty(object_id(c.table_schema + '.' + c.table_name), c.column_name,'IsIdentity') as IsIdentity
FROM INFORMATION_SCHEMA.TABLES t,
INFORMATION_SCHEMA.COLUMNS c
WHERE t.table_name = c.table_name
AND t.table_name = :table
EOD;
if($schemaName!==null)
$sql .= ' AND t.table_schema = :schema';
if($catalogName!==null)
$sql .= ' AND t.table_catalog = :catalog';
$command = $this->getDbConnection()->createCommand($sql);
$command->bindValue(':table', $tableName);
if($schemaName!==null)
$command->bindValue(':schema', $schemaName);
if($catalogName!==null)
$command->bindValue(':catalog', $catalogName);
$tableInfo=null;
foreach($command->query() as $col)
{
if($tableInfo===null)
$tableInfo = $this->createNewTableInfo($col);
$this->processColumn($tableInfo,$col);
}
if($tableInfo===null)
throw new TDbException('dbmetadata_invalid_table_view', $table);
return $tableInfo;
}
/**
* @param string table name
* @return array tuple($catalogName,$schemaName,$tableName)
*/
protected function getCatalogSchemaTableName($table)
{
//remove possible delimiters
$result = explode('.', preg_replace('/\[|\]|"/', '', $table));
if(count($result)===1)
return array(null,null,$result[0]);
if(count($result)===2)
return array(null,$result[0],$result[1]);
if(count($result)>2)
return array($result[0],$result[1],$result[2]);
}
/**
* @param TMssqlTableInfo table information.
* @param array column information.
*/
protected function processColumn($tableInfo, $col)
{
$columnId = $col['COLUMN_NAME'];
$info['ColumnName'] = "[$columnId]"; //quote the column names!
$info['ColumnId'] = $columnId;
$info['ColumnIndex'] = intval($col['ORDINAL_POSITION'])-1; //zero-based index
if($col['IS_NULLABLE']!=='NO')
$info['AllowNull'] = true;
if($col['COLUMN_DEFAULT']!==null)
$info['DefaultValue'] = $col['COLUMN_DEFAULT'];
if(in_array($columnId, $tableInfo->getPrimaryKeys()))
$info['IsPrimaryKey'] = true;
if($this->isForeignKeyColumn($columnId, $tableInfo))
$info['IsForeignKey'] = true;
if($col['IsIdentity']==='1')
$info['AutoIncrement'] = true;
$info['DbType'] = $col['DATA_TYPE'];
if($col['CHARACTER_MAXIMUM_LENGTH']!==null)
$info['ColumnSize'] = intval($col['CHARACTER_MAXIMUM_LENGTH']);
if($col['NUMERIC_PRECISION'] !== null)
$info['NumericPrecision'] = intval($col['NUMERIC_PRECISION']);
if($col['NUMERIC_SCALE']!==null)
$info['NumericScale'] = intval($col['NUMERIC_SCALE']);
$tableInfo->Columns[$columnId] = new TMssqlTableColumn($info);
}
/**
* @param string table schema name
* @param string table name.
* @return TMssqlTableInfo
*/
protected function createNewTableInfo($col)
{
$info['CatalogName'] = $col['TABLE_CATALOG'];
$info['SchemaName'] = $col['TABLE_SCHEMA'];
$info['TableName'] = $col['TABLE_NAME'];
if($col['TABLE_TYPE']==='VIEW')
$info['IsView'] = true;
list($primary, $foreign) = $this->getConstraintKeys($col);
$class = $this->getTableInfoClass();
return new $class($info,$primary,$foreign);
}
/**
* Gets the primary and foreign key column details for the given table.
* @param string schema name
* @param string table name.
* @return array tuple ($primary, $foreign)
*/
protected function getConstraintKeys($col)
{
$sql = <<<EOD
SELECT k.column_name field_name
FROM INFORMATION_SCHEMA.KEY_COLUMN_USAGE k
LEFT JOIN INFORMATION_SCHEMA.TABLE_CONSTRAINTS c
ON k.table_name = c.table_name
AND k.constraint_name = c.constraint_name
WHERE k.constraint_catalog = DB_NAME()
AND
c.constraint_type ='PRIMARY KEY'
AND k.table_name = :table
EOD;
$command = $this->getDbConnection()->createCommand($sql);
$command->bindValue(':table', $col['TABLE_NAME']);
$primary = array();
foreach($command->query()->readAll() as $field)
$primary[] = $field['field_name'];
$foreign = $this->getForeignConstraints($col);
return array($primary,$foreign);
}
/**
* Gets foreign relationship constraint keys and table name
* @param string database name
* @param string table name
* @return array foreign relationship table name and keys.
*/
protected function getForeignConstraints($col)
{
//From http://msdn2.microsoft.com/en-us/library/aa175805(SQL.80).aspx
$sql = <<<EOD
SELECT
KCU1.CONSTRAINT_NAME AS 'FK_CONSTRAINT_NAME'
, KCU1.TABLE_NAME AS 'FK_TABLE_NAME'
, KCU1.COLUMN_NAME AS 'FK_COLUMN_NAME'
, KCU1.ORDINAL_POSITION AS 'FK_ORDINAL_POSITION'
, KCU2.CONSTRAINT_NAME AS 'UQ_CONSTRAINT_NAME'
, KCU2.TABLE_NAME AS 'UQ_TABLE_NAME'
, KCU2.COLUMN_NAME AS 'UQ_COLUMN_NAME'
, KCU2.ORDINAL_POSITION AS 'UQ_ORDINAL_POSITION'
FROM INFORMATION_SCHEMA.REFERENTIAL_CONSTRAINTS RC
JOIN INFORMATION_SCHEMA.KEY_COLUMN_USAGE KCU1
ON KCU1.CONSTRAINT_CATALOG = RC.CONSTRAINT_CATALOG
AND KCU1.CONSTRAINT_SCHEMA = RC.CONSTRAINT_SCHEMA
AND KCU1.CONSTRAINT_NAME = RC.CONSTRAINT_NAME
JOIN INFORMATION_SCHEMA.KEY_COLUMN_USAGE KCU2
ON KCU2.CONSTRAINT_CATALOG =
RC.UNIQUE_CONSTRAINT_CATALOG
AND KCU2.CONSTRAINT_SCHEMA =
RC.UNIQUE_CONSTRAINT_SCHEMA
AND KCU2.CONSTRAINT_NAME =
RC.UNIQUE_CONSTRAINT_NAME
AND KCU2.ORDINAL_POSITION = KCU1.ORDINAL_POSITION
WHERE KCU1.TABLE_NAME = :table
EOD;
$command = $this->getDbConnection()->createCommand($sql);
$command->bindValue(':table', $col['TABLE_NAME']);
$fkeys=array();
$catalogSchema = "[{$col['TABLE_CATALOG']}].[{$col['TABLE_SCHEMA']}]";
foreach($command->query() as $info)
{
$fkeys[$info['FK_CONSTRAINT_NAME']]['keys'][$info['FK_COLUMN_NAME']] = $info['UQ_COLUMN_NAME'];
$fkeys[$info['FK_CONSTRAINT_NAME']]['table'] = $info['UQ_TABLE_NAME'];
}
return count($fkeys) > 0 ? array_values($fkeys) : $fkeys;
}
/**
* @param string column name.
* @param TPgsqlTableInfo table information.
* @return boolean true if column is a foreign key.
*/
protected function isForeignKeyColumn($columnId, $tableInfo)
{
foreach($tableInfo->getForeignKeys() as $fk)
{
if(in_array($columnId, array_keys($fk['keys'])))
return true;
}
return false;
}
}
|
