MediaWiki  1.30.0
PostgresField.php
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1 <?php
2 
3 namespace Wikimedia\Rdbms;
4 
5 class PostgresField implements Field {
8 
15  static function fromText( DatabasePostgres $db, $table, $field ) {
16  $q = <<<SQL
17 SELECT
18  attnotnull, attlen, conname AS conname,
19  atthasdef,
20  adsrc,
21  COALESCE(condeferred, 'f') AS deferred,
22  COALESCE(condeferrable, 'f') AS deferrable,
23  CASE WHEN typname = 'int2' THEN 'smallint'
24  WHEN typname = 'int4' THEN 'integer'
25  WHEN typname = 'int8' THEN 'bigint'
26  WHEN typname = 'bpchar' THEN 'char'
27  ELSE typname END AS typname
28 FROM pg_class c
29 JOIN pg_namespace n ON (n.oid = c.relnamespace)
30 JOIN pg_attribute a ON (a.attrelid = c.oid)
31 JOIN pg_type t ON (t.oid = a.atttypid)
32 LEFT JOIN pg_constraint o ON (o.conrelid = c.oid AND a.attnum = ANY(o.conkey) AND o.contype = 'f')
33 LEFT JOIN pg_attrdef d on c.oid=d.adrelid and a.attnum=d.adnum
34 WHERE relkind = 'r'
35 AND nspname=%s
36 AND relname=%s
37 AND attname=%s;
38 SQL;
39 
40  $table = $db->remappedTableName( $table );
41  $res = $db->query(
42  sprintf( $q,
43  $db->addQuotes( $db->getCoreSchema() ),
44  $db->addQuotes( $table ),
45  $db->addQuotes( $field )
46  )
47  );
48  $row = $db->fetchObject( $res );
49  if ( !$row ) {
50  return null;
51  }
52  $n = new PostgresField;
53  $n->type = $row->typname;
54  $n->nullable = ( $row->attnotnull == 'f' );
55  $n->name = $field;
56  $n->tablename = $table;
57  $n->max_length = $row->attlen;
58  $n->deferrable = ( $row->deferrable == 't' );
59  $n->deferred = ( $row->deferred == 't' );
60  $n->conname = $row->conname;
61  $n->has_default = ( $row->atthasdef === 't' );
62  $n->default = $row->adsrc;
63 
64  return $n;
65  }
66 
67  function name() {
68  return $this->name;
69  }
70 
71  function tableName() {
72  return $this->tablename;
73  }
74 
75  function type() {
76  return $this->type;
77  }
78 
79  function isNullable() {
80  return $this->nullable;
81  }
82 
83  function maxLength() {
84  return $this->max_length;
85  }
86 
87  function is_deferrable() {
88  return $this->deferrable;
89  }
90 
91  function is_deferred() {
92  return $this->deferred;
93  }
94 
95  function conname() {
96  return $this->conname;
97  }
98 
103  function defaultValue() {
104  if ( $this->has_default ) {
105  return $this->default;
106  } else {
107  return false;
108  }
109  }
110 }
Wikimedia\Rdbms\PostgresField\conname
conname()
Definition: PostgresField.php:95
Wikimedia\Rdbms\PostgresField\tableName
tableName()
Name of table this field belongs to.
Definition: PostgresField.php:71
Wikimedia\Rdbms\PostgresField\$conname
$conname
Definition: PostgresField.php:6
Wikimedia\Rdbms\DatabasePostgres\remappedTableName
remappedTableName( $name)
Definition: DatabasePostgres.php:759
Wikimedia\Rdbms\DatabasePostgres\addQuotes
addQuotes( $s)
Adds quotes and backslashes.
Definition: DatabasePostgres.php:1202
Wikimedia\Rdbms\PostgresField\$name
$name
Definition: PostgresField.php:6
FROM
as see the revision history and available at free of to any person obtaining a copy of this software and associated documentation to deal in the Software without including without limitation the rights to and or sell copies of the and to permit persons to whom the Software is furnished to do subject to the following WITHOUT WARRANTY OF ANY EXPRESS OR INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY DAMAGES OR OTHER WHETHER IN AN ACTION OF TORT OR ARISING FROM
Definition: MIT-LICENSE.txt:10
Wikimedia\Rdbms
Definition: ChronologyProtector.php:24
Wikimedia\Rdbms\DatabasePostgres
Definition: DatabasePostgres.php:33
$res
$res
Definition: database.txt:21
Wikimedia\Rdbms\PostgresField\$default
$default
Definition: PostgresField.php:6
Wikimedia\Rdbms\PostgresField\is_deferrable
is_deferrable()
Definition: PostgresField.php:87
Wikimedia\Rdbms\DatabasePostgres\fetchObject
fetchObject( $res)
Fetch the next row from the given result object, in object form.
Definition: DatabasePostgres.php:277
php
injection txt This is an overview of how MediaWiki makes use of dependency injection The design described here grew from the discussion of RFC T384 The term dependency this means that anything an object needs to operate should be injected from the the object itself should only know narrow no concrete implementation of the logic it relies on The requirement to inject everything typically results in an architecture that based on two main types of and essentially stateless service objects that use other service objects to operate on the value objects As of the beginning MediaWiki is only starting to use the DI approach Much of the code still relies on global state or direct resulting in a highly cyclical dependency which acts as the top level factory for services in MediaWiki which can be used to gain access to default instances of various services MediaWikiServices however also allows new services to be defined and default services to be redefined Services are defined or redefined by providing a callback the instantiator that will return a new instance of the service When it will create an instance of MediaWikiServices and populate it with the services defined in the files listed by thereby bootstrapping the DI framework Per $wgServiceWiringFiles lists includes ServiceWiring php
Definition: injection.txt:35
Wikimedia\Rdbms\PostgresField\name
name()
Field name.
Definition: PostgresField.php:67
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Definition: parserTests.txt:89
Wikimedia\Rdbms\PostgresField\$deferred
$deferred
Definition: PostgresField.php:6
Wikimedia\Rdbms\PostgresField\fromText
static fromText(DatabasePostgres $db, $table, $field)
Definition: PostgresField.php:15
Wikimedia\Rdbms\PostgresField\$has_default
$has_default
Definition: PostgresField.php:6
Wikimedia\Rdbms\PostgresField\$type
$type
Definition: PostgresField.php:6
Wikimedia\Rdbms\PostgresField\maxLength
maxLength()
Definition: PostgresField.php:83
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We ve cleaned up the code here by removing clumps of infrequently used code and moving them off somewhere else It s much easier for someone working with this code to see what s _really_ going on
Definition: hooks.txt:84
Wikimedia\Rdbms\PostgresField\$max_length
$max_length
Definition: PostgresField.php:6
Wikimedia\Rdbms\PostgresField\$deferrable
$deferrable
Definition: PostgresField.php:6
Wikimedia\Rdbms\Database\query
query( $sql, $fname=__METHOD__, $tempIgnore=false)
Run an SQL query and return the result.
Definition: Database.php:888
Wikimedia\Rdbms\PostgresField
Definition: PostgresField.php:5
c
type show c for details The hypothetical commands show w and show c should show the appropriate parts of the General Public License Of the commands you use may be called something other than show w and show c
Definition: COPYING.txt:321
Wikimedia\Rdbms\Field
Base for all database-specific classes representing information about database fields.
Definition: Field.php:9
and
and that you know you can do these things To protect your we need to make restrictions that forbid anyone to deny you these rights or to ask you to surrender the rights These restrictions translate to certain responsibilities for you if you distribute copies of the or if you modify it For if you distribute copies of such a whether gratis or for a you must give the recipients all the rights that you have You must make sure that receive or can get the source code And you must show them these terms so they know their rights We protect your rights with two and(2) offer you this license which gives you legal permission to copy
Wikimedia\Rdbms\PostgresField\defaultValue
defaultValue()
Definition: PostgresField.php:103
Wikimedia\Rdbms\PostgresField\isNullable
isNullable()
Whether this field can store NULL values.
Definition: PostgresField.php:79
Wikimedia\Rdbms\PostgresField\type
type()
Database type.
Definition: PostgresField.php:75
Wikimedia\Rdbms\DatabasePostgres\getCoreSchema
getCoreSchema()
Return schema name for core application tables.
Definition: DatabasePostgres.php:1016
Wikimedia\Rdbms\PostgresField\$tablename
$tablename
Definition: PostgresField.php:6
Wikimedia\Rdbms\PostgresField\is_deferred
is_deferred()
Definition: PostgresField.php:91
Wikimedia\Rdbms\PostgresField\$nullable
$nullable
Definition: PostgresField.php:6
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Definition: cleanup.php:99