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| 1 | <?php |
| 2 | |
| 3 | namespace Wikimedia\Rdbms; |
| 4 | |
| 5 | use InvalidArgumentException; |
| 6 | use UnexpectedValueException; |
| 7 | |
| 8 | /** |
| 9 | * Build UPDATE queries with a fluent interface. |
| 10 | * |
| 11 | * Each query builder object must be used for a single database query only, |
| 12 | * and not be reused afterwards. To run multiple similar queries, you can |
| 13 | * create a query builder to set up most of your query, which you can use |
| 14 | * as a "template" to clone. You can then modify the cloned object for |
| 15 | * each individual query. |
| 16 | * |
| 17 | * @since 1.41 |
| 18 | * @stable to extend |
| 19 | * @ingroup Database |
| 20 | */ |
| 21 | class UpdateQueryBuilder implements IWriteQueryBuilder { |
| 22 | /** |
| 23 | * @var string The table name to be passed to IDatabase::update() |
| 24 | */ |
| 25 | private $table = ''; |
| 26 | |
| 27 | /** |
| 28 | * @var array The set values to be passed to IDatabase::update() |
| 29 | */ |
| 30 | private $set = []; |
| 31 | |
| 32 | /** |
| 33 | * @var array The conditions to be passed to IDatabase::update() |
| 34 | */ |
| 35 | private $conds = []; |
| 36 | |
| 37 | /** |
| 38 | * @var string The caller (function name) to be passed to IDatabase::update() |
| 39 | */ |
| 40 | private $caller = __CLASS__; |
| 41 | |
| 42 | /** |
| 43 | * @var array The options to be passed to IDatabase::update() |
| 44 | */ |
| 45 | protected $options = []; |
| 46 | |
| 47 | protected IDatabase $db; |
| 48 | |
| 49 | /** |
| 50 | * Only for use in subclasses. To create a UpdateQueryBuilder instance, |
| 51 | * use `$db->newUpdateQueryBuilder()` instead. |
| 52 | */ |
| 53 | public function __construct( IDatabase $db ) { |
| 54 | $this->db = $db; |
| 55 | } |
| 56 | |
| 57 | /** |
| 58 | * @inheritDoc |
| 59 | */ |
| 60 | public function connection( IDatabase $db ) { |
| 61 | if ( $this->db->getType() !== $db->getType() ) { |
| 62 | throw new InvalidArgumentException( |
| 63 | __METHOD__ . ' cannot switch to a database of a different type.' |
| 64 | ); |
| 65 | } |
| 66 | $this->db = $db; |
| 67 | return $this; |
| 68 | } |
| 69 | |
| 70 | /** |
| 71 | * @inheritDoc |
| 72 | */ |
| 73 | public function queryInfo( $info ) { |
| 74 | if ( isset( $info['table'] ) ) { |
| 75 | $this->table( $info['table'] ); |
| 76 | } |
| 77 | if ( isset( $info['set'] ) ) { |
| 78 | $this->set( $info['set'] ); |
| 79 | } |
| 80 | if ( isset( $info['conds'] ) ) { |
| 81 | $this->where( $info['conds'] ); |
| 82 | } |
| 83 | if ( isset( $info['options'] ) ) { |
| 84 | $this->options( (array)$info['options'] ); |
| 85 | } |
| 86 | if ( isset( $info['caller'] ) ) { |
| 87 | $this->caller( $info['caller'] ); |
| 88 | } |
| 89 | return $this; |
| 90 | } |
| 91 | |
| 92 | /** |
| 93 | * Manually set the table name to be passed to IDatabase::update() |
| 94 | * |
| 95 | * @param string $table The unqualified name of a table |
| 96 | * @param-taint $table exec_sql |
| 97 | * @return $this |
| 98 | */ |
| 99 | public function table( $table ) { |
| 100 | $this->table = $table; |
| 101 | return $this; |
| 102 | } |
| 103 | |
| 104 | /** |
| 105 | * Set table for the query. Alias for table(). |
| 106 | * |
| 107 | * @param string $table The unqualified name of a table |
| 108 | * @param-taint $table exec_sql |
| 109 | * @return $this |
| 110 | */ |
| 111 | public function update( string $table ) { |
| 112 | return $this->table( $table ); |
| 113 | } |
| 114 | |
| 115 | /** |
| 116 | * Manually set an option in the $options array to be passed to |
| 117 | * IDatabase::update() |
| 118 | * |
| 119 | * @param string $name The option name |
| 120 | * @param mixed $value The option value, or null for a boolean option |
| 121 | * @return $this |
| 122 | */ |
| 123 | public function option( $name, $value = null ) { |
| 124 | if ( $value === null ) { |
| 125 | $this->options[] = $name; |
| 126 | } else { |
| 127 | $this->options[$name] = $value; |
| 128 | } |
| 129 | return $this; |
| 130 | } |
| 131 | |
| 132 | /** |
| 133 | * Manually set multiple options in the $options array to be passed to |
| 134 | * IDatabase::update(). |
| 135 | * |
| 136 | * @param array $options |
| 137 | * @return $this |
| 138 | */ |
| 139 | public function options( array $options ) { |
| 140 | $this->options = array_merge( $this->options, $options ); |
| 141 | return $this; |
| 142 | } |
| 143 | |
| 144 | /** |
| 145 | * Add conditions to the query. The supplied conditions will be appended |
| 146 | * to the existing conditions, separated by AND. |
| 147 | * |
| 148 | * @phpcs:ignore Generic.Files.LineLength |
| 149 | * @param string|IExpression|array<string,?scalar|non-empty-array<int,?scalar|Blob>|RawSQLValue|Blob>|array<int,string|IExpression> $conds |
| 150 | * |
| 151 | * May be either a string containing a single condition, or an array of |
| 152 | * conditions. If an array is given, the conditions constructed from each |
| 153 | * element are combined with AND. |
| 154 | * |
| 155 | * Array elements may take one of two forms: |
| 156 | * |
| 157 | * - Elements with a numeric key are interpreted as raw SQL fragments. |
| 158 | * - Elements with a string key are interpreted as equality conditions, |
| 159 | * where the key is the field name. |
| 160 | * - If the value of such an array element is a scalar (such as a |
| 161 | * string), it will be treated as data and thus quoted appropriately. |
| 162 | * If it is null, an IS NULL clause will be added. |
| 163 | * - If the value is an array, an IN (...) clause will be constructed |
| 164 | * from its non-null elements, and an IS NULL clause will be added |
| 165 | * if null is present, such that the field may match any of the |
| 166 | * elements in the array. The non-null elements will be quoted. |
| 167 | * |
| 168 | * Note that expressions are often DBMS-dependent in their syntax. |
| 169 | * DBMS-independent wrappers are provided for constructing several types of |
| 170 | * expression commonly used in condition queries. See: |
| 171 | * - {@link ISQLPlatform::buildLike()} |
| 172 | * - {@link ISQLPlatform::conditional()} |
| 173 | * |
| 174 | * Untrusted user input is safe in the values of string keys, however untrusted |
| 175 | * input must not be used in the array key names or in the values of numeric keys. |
| 176 | * Escaping of untrusted input used in values of numeric keys should be done via |
| 177 | * {@link IDatabase::addQuotes()}. |
| 178 | * |
| 179 | * @param-taint $conds exec_sql_numkey |
| 180 | * @return $this |
| 181 | */ |
| 182 | public function where( $conds ) { |
| 183 | if ( is_array( $conds ) ) { |
| 184 | foreach ( $conds as $key => $cond ) { |
| 185 | if ( is_int( $key ) ) { |
| 186 | $this->conds[] = $cond; |
| 187 | } elseif ( isset( $this->conds[$key] ) ) { |
| 188 | // @phan-suppress-previous-line PhanTypeMismatchDimFetch |
| 189 | // T288882 |
| 190 | $this->conds[] = $this->db->makeList( |
| 191 | [ $key => $cond ], IDatabase::LIST_AND ); |
| 192 | } else { |
| 193 | $this->conds[$key] = $cond; |
| 194 | } |
| 195 | } |
| 196 | } else { |
| 197 | $this->conds[] = $conds; |
| 198 | } |
| 199 | return $this; |
| 200 | } |
| 201 | |
| 202 | /** |
| 203 | * Add conditions to the query. Alias for where(). |
| 204 | * |
| 205 | * @phpcs:ignore Generic.Files.LineLength |
| 206 | * @param string|IExpression|array<string,?scalar|non-empty-array<int,?scalar|Blob>|RawSQLValue|Blob>|array<int,string|IExpression> $conds |
| 207 | * @param-taint $conds exec_sql_numkey |
| 208 | * @return $this |
| 209 | */ |
| 210 | public function andWhere( $conds ) { |
| 211 | return $this->where( $conds ); |
| 212 | } |
| 213 | |
| 214 | /** |
| 215 | * Add conditions to the query. Alias for where(). |
| 216 | * |
| 217 | * @phpcs:ignore Generic.Files.LineLength |
| 218 | * @param string|IExpression|array<string,?scalar|non-empty-array<int,?scalar|Blob>|RawSQLValue|Blob>|array<int,string|IExpression> $conds |
| 219 | * @param-taint $conds exec_sql_numkey |
| 220 | * @return $this |
| 221 | */ |
| 222 | public function conds( $conds ) { |
| 223 | return $this->where( $conds ); |
| 224 | } |
| 225 | |
| 226 | /** |
| 227 | * Add SET part to the query. It takes an array containing arrays of column names map to |
| 228 | * the set values. |
| 229 | * |
| 230 | * @param string|array<string,?scalar|RawSQLValue|Blob>|array<int,string> $set |
| 231 | * @param-taint $set exec_sql_numkey |
| 232 | * |
| 233 | * Combination map/list where each string-keyed entry maps a column |
| 234 | * to a literal assigned value and each integer-keyed value is a SQL expression in the |
| 235 | * format of a column assignment within UPDATE...SET. The (column => value) entries are |
| 236 | * convenient due to automatic value quoting and conversion of null to NULL. The SQL |
| 237 | * assignment format is useful for updates like "column = column + X". All assignments |
| 238 | * have no defined execution order, so they should not depend on each other. Do not |
| 239 | * modify AUTOINCREMENT or UUID columns in assignments. |
| 240 | * |
| 241 | * Untrusted user input is safe in the values of string keys, however untrusted |
| 242 | * input must not be used in the array key names or in the values of numeric keys. |
| 243 | * Escaping of untrusted input used in values of numeric keys should be done via |
| 244 | * IDatabase::addQuotes() |
| 245 | * |
| 246 | * @return $this |
| 247 | */ |
| 248 | public function set( $set ) { |
| 249 | if ( is_array( $set ) ) { |
| 250 | foreach ( $set as $key => $value ) { |
| 251 | if ( is_int( $key ) ) { |
| 252 | $this->set[] = $value; |
| 253 | } else { |
| 254 | $this->set[$key] = $value; |
| 255 | } |
| 256 | } |
| 257 | } else { |
| 258 | $this->set[] = $set; |
| 259 | } |
| 260 | return $this; |
| 261 | } |
| 262 | |
| 263 | /** |
| 264 | * Add set values to the query. Alias for set(). |
| 265 | * |
| 266 | * @param string|array<string,?scalar|RawSQLValue|Blob>|array<int,string> $set |
| 267 | * @param-taint $set exec_sql_numkey |
| 268 | * @return $this |
| 269 | */ |
| 270 | public function andSet( $set ) { |
| 271 | return $this->set( $set ); |
| 272 | } |
| 273 | |
| 274 | /** |
| 275 | * Enable the IGNORE option. |
| 276 | * |
| 277 | * Skip update of rows that would cause unique key conflicts. |
| 278 | * IDatabase::affectedRows() can be used to determine how many rows were updated. |
| 279 | * |
| 280 | * @return $this |
| 281 | */ |
| 282 | public function ignore() { |
| 283 | $this->options[] = 'IGNORE'; |
| 284 | return $this; |
| 285 | } |
| 286 | |
| 287 | /** |
| 288 | * @inheritDoc |
| 289 | */ |
| 290 | public function caller( $fname ) { |
| 291 | $this->caller = $fname; |
| 292 | return $this; |
| 293 | } |
| 294 | |
| 295 | /** |
| 296 | * @inheritDoc |
| 297 | */ |
| 298 | public function execute(): void { |
| 299 | if ( !$this->conds ) { |
| 300 | throw new UnexpectedValueException( |
| 301 | __METHOD__ . ' expects at least one condition to be set' ); |
| 302 | } |
| 303 | if ( !$this->set ) { |
| 304 | throw new UnexpectedValueException( |
| 305 | __METHOD__ . ' can\t have empty $set value' ); |
| 306 | } |
| 307 | if ( $this->table === '' ) { |
| 308 | throw new UnexpectedValueException( |
| 309 | __METHOD__ . ' expects table not to be empty' ); |
| 310 | } |
| 311 | $this->db->update( $this->table, $this->set, $this->conds, $this->caller, $this->options ); |
| 312 | } |
| 313 | |
| 314 | /** |
| 315 | * @inheritDoc |
| 316 | */ |
| 317 | public function getQueryInfo() { |
| 318 | $info = [ |
| 319 | 'table' => $this->table, |
| 320 | 'set' => $this->set, |
| 321 | 'conds' => $this->conds, |
| 322 | 'options' => $this->options, |
| 323 | ]; |
| 324 | if ( $this->caller !== __CLASS__ ) { |
| 325 | $info['caller'] = $this->caller; |
| 326 | } |
| 327 | return $info; |
| 328 | } |
| 329 | } |