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| 1 | <?php |
| 2 | /** |
| 3 | * Playground_DB_Importer file. |
| 4 | * |
| 5 | * @package wpcomsh |
| 6 | */ |
| 7 | |
| 8 | namespace Imports; |
| 9 | |
| 10 | require_once __DIR__ . '/class-sql-generator.php'; |
| 11 | |
| 12 | use SQLite3; |
| 13 | use WP_Error; |
| 14 | |
| 15 | /** |
| 16 | * Parses a Playground SQLite database file and generate a SQL file. |
| 17 | */ |
| 18 | class Playground_DB_Importer { |
| 19 | /** |
| 20 | * Name of the table where SQLite map the internal types to the MySQL types. |
| 21 | */ |
| 22 | public const SQLITE_DATA_TYPES_TABLE = '_mysql_data_types_cache'; |
| 23 | |
| 24 | /** |
| 25 | * Name of the table where SQLite store the autoincrement value. |
| 26 | */ |
| 27 | public const SQLITE_SEQUENCE_TABLE = 'sqlite_sequence'; |
| 28 | |
| 29 | /** |
| 30 | * The database connection. |
| 31 | * |
| 32 | * @var ?SQLite3 |
| 33 | */ |
| 34 | private ?SQLite3 $db; |
| 35 | |
| 36 | /** |
| 37 | * The options. |
| 38 | * |
| 39 | * @var array |
| 40 | */ |
| 41 | private array $options = array(); |
| 42 | |
| 43 | /** |
| 44 | * Generate a .sql file from a Playground SQLite database file. |
| 45 | * |
| 46 | * @param string $database_file_path The database file path. |
| 47 | * @param array $options { |
| 48 | * An array of options. |
| 49 | * |
| 50 | * @type bool $all_tables Generate all tables, not only core. Defaults to true. |
| 51 | * @type string $charset The charset to use for the generated SQL. Defaults to 'latin1'. |
| 52 | * @type string $collation The collation to use for the generated SQL. Defaults to null. |
| 53 | * @type array $exclude_tables A list of tables to exclude from the generated SQL. |
| 54 | * @type string $output_file The output file path. If not set, a temporary file will be used. |
| 55 | * @type int $output_mode Output mode. Defaults to SQL_Generator::OUTPUT_TYPE_STRING. |
| 56 | * @type string $output_prefix The generated tables prefix. |
| 57 | * @type string $prefix The input tables prefix. (Always `wp_` for Playground databases) |
| 58 | * @type string $tmp_prefix The temporary tables prefix. |
| 59 | * @type bool $tmp_tables Whether to generate temporary tables instead of TRANSACTION. Defaults to false. |
| 60 | * } |
| 61 | * |
| 62 | * @return string|WP_Error |
| 63 | */ |
| 64 | public function generate_sql( string $database_file_path, $options = array() ) { |
| 65 | global $wpdb; |
| 66 | |
| 67 | $defaults = array( |
| 68 | 'all_tables' => true, |
| 69 | 'charset' => 'latin1', |
| 70 | 'collation' => null, |
| 71 | 'exclude_tables' => array(), |
| 72 | 'output_file' => null, |
| 73 | 'output_mode' => SQL_Generator::OUTPUT_TYPE_STRING, |
| 74 | 'output_prefix' => $wpdb->prefix, |
| 75 | 'prefix' => 'wp_', |
| 76 | 'tmp_prefix' => 'tmp_', |
| 77 | 'tmp_tables' => false, |
| 78 | ); |
| 79 | |
| 80 | $this->options = wp_parse_args( $options, $defaults ); |
| 81 | |
| 82 | // Bail if the file doesn't exist. |
| 83 | if ( ! is_file( $database_file_path ) || ! is_readable( $database_file_path ) ) { |
| 84 | return new WP_Error( 'database-file-not-exists', 'Database file not exists' ); |
| 85 | } |
| 86 | |
| 87 | // Bail if the file is empty. |
| 88 | if ( filesize( $database_file_path ) <= 0 ) { |
| 89 | return new WP_Error( 'database-file-empty', 'Database file is empty' ); |
| 90 | } |
| 91 | |
| 92 | // Set the output file. |
| 93 | if ( $this->options['output_mode'] === SQL_Generator::OUTPUT_TYPE_FILE ) { |
| 94 | // If the output file is not set, then use a temporary file. |
| 95 | if ( empty( $this->options['output_file'] ) ) { |
| 96 | $this->options['output_file'] = trailingslashit( sys_get_temp_dir() ) . $this->get_tmp_file_name(); |
| 97 | } |
| 98 | } else { |
| 99 | $this->options['output_file'] = null; |
| 100 | } |
| 101 | |
| 102 | try { |
| 103 | // Try to open the database file. |
| 104 | $this->db = new SQLite3( $database_file_path, SQLITE3_OPEN_READONLY ); |
| 105 | |
| 106 | $ret = $this->parse_database(); |
| 107 | |
| 108 | $this->db->close(); |
| 109 | |
| 110 | if ( is_wp_error( $ret ) ) { |
| 111 | return $ret; |
| 112 | } |
| 113 | |
| 114 | // Return the file path if the output mode is file. |
| 115 | if ( $this->options['output_mode'] === SQL_Generator::OUTPUT_TYPE_FILE ) { |
| 116 | return $this->options['output_file']; |
| 117 | } |
| 118 | |
| 119 | // Return the SQL string. |
| 120 | return $ret; |
| 121 | } catch ( \Exception $e ) { |
| 122 | $this->db = null; |
| 123 | |
| 124 | return new WP_Error( 'sqlite-open-error', $e->getMessage() ); |
| 125 | } |
| 126 | } |
| 127 | |
| 128 | /** |
| 129 | * Parse the database and load data. |
| 130 | * |
| 131 | * @return string|WP_Error |
| 132 | */ |
| 133 | private function parse_database() { |
| 134 | global $wpdb; |
| 135 | |
| 136 | if ( ! $this->db ) { |
| 137 | return new WP_Error( 'no-database-connection', 'No database connection.' ); |
| 138 | } |
| 139 | |
| 140 | // Check if the bind table and the sequence table exist. |
| 141 | $valid_db = $this->check_database_integrity(); |
| 142 | |
| 143 | if ( is_wp_error( $valid_db ) ) { |
| 144 | return $valid_db; |
| 145 | } |
| 146 | |
| 147 | $core_tables = array_flip( $wpdb->tables ); |
| 148 | $results = $this->db->query( 'SELECT name FROM sqlite_master WHERE type=\'table\'' ); |
| 149 | |
| 150 | if ( ! $results ) { |
| 151 | return new WP_Error( 'no-database-master-schema', 'Query error: can\'t read database schema.' ); |
| 152 | } |
| 153 | |
| 154 | $generator = new SQL_Generator(); |
| 155 | $excluded = is_array( $this->options['exclude_tables'] ) ? $this->options['exclude_tables'] : array(); |
| 156 | |
| 157 | if ( $this->options['tmp_tables'] ) { |
| 158 | $this->options['transaction'] = false; |
| 159 | } |
| 160 | |
| 161 | $started = $generator->start( $this->options ); |
| 162 | |
| 163 | if ( is_wp_error( $started ) ) { |
| 164 | return $started; |
| 165 | } |
| 166 | |
| 167 | // Check if the table exists in the core tables list. |
| 168 | while ( $table = $results->fetchArray( SQLITE3_ASSOC ) ) { // phpcs:ignore Generic.CodeAnalysis.AssignmentInCondition.FoundInWhileCondition |
| 169 | $table_name = $this->get_input_table_name( $table['name'] ); |
| 170 | |
| 171 | // This is not a core table. Skip if all tables needed. |
| 172 | if ( ! $this->options['all_tables'] && ! array_key_exists( $table_name, $core_tables ) ) { |
| 173 | continue; |
| 174 | } |
| 175 | |
| 176 | // SQLite internal tables. Skip. |
| 177 | if ( ! $this->is_valid_table( $table_name ) ) { |
| 178 | continue; |
| 179 | } |
| 180 | |
| 181 | // An excluded table. Skip. |
| 182 | if ( in_array( $table_name, $excluded, true ) ) { |
| 183 | // Remove the table from the excluded list. |
| 184 | unset( $excluded[ $table_name ] ); |
| 185 | |
| 186 | continue; |
| 187 | } |
| 188 | |
| 189 | // Get the type map. |
| 190 | $types_map = $this->get_table_types_map( $table['name'] ); |
| 191 | |
| 192 | if ( is_wp_error( $types_map ) ) { |
| 193 | return $types_map; |
| 194 | } elseif ( empty( $types_map['map'] ) ) { |
| 195 | continue; |
| 196 | } |
| 197 | |
| 198 | // Force a temporary table name if needed. |
| 199 | $output_table = $this->get_output_table_name( $table_name ); |
| 200 | |
| 201 | $generator->start_table( $output_table, $types_map['map'], $types_map['auto_increment'] ); |
| 202 | $this->generate_inserts( $generator, $table['name'], $types_map['format'], $types_map['field_names'] ); |
| 203 | $generator->end_table_inserts(); |
| 204 | |
| 205 | if ( ! $this->options['all_tables'] ) { |
| 206 | // Remove the table from the core tables list. |
| 207 | unset( $core_tables[ $table_name ] ); |
| 208 | } |
| 209 | } |
| 210 | |
| 211 | if ( ! $this->options['all_tables'] ) { |
| 212 | // If the core tables list is not empty, then there are missing tables. |
| 213 | if ( ! empty( $core_tables ) ) { |
| 214 | return new WP_Error( 'missing-tables', 'Query error: missing tables.' ); |
| 215 | } |
| 216 | } |
| 217 | |
| 218 | $generator->end(); |
| 219 | |
| 220 | // Found all the tables, return the SQL. |
| 221 | return $generator->get_dump(); |
| 222 | } |
| 223 | |
| 224 | /** |
| 225 | * Check the database integrity. |
| 226 | * |
| 227 | * The `_mysql_data_types_cache` and `sqlite_sequence` tables must exist. |
| 228 | * |
| 229 | * @return bool|WP_Error |
| 230 | */ |
| 231 | private function check_database_integrity() { |
| 232 | // Check if the bind table and the sequence table exist. |
| 233 | $query = $this->prepare( |
| 234 | 'SELECT COUNT(*) FROM sqlite_master WHERE type=%s AND (name=%s OR name=%s)', |
| 235 | 'table', |
| 236 | self::SQLITE_DATA_TYPES_TABLE, |
| 237 | self::SQLITE_SEQUENCE_TABLE |
| 238 | ); |
| 239 | $count = $this->db->querySingle( $query ); |
| 240 | |
| 241 | if ( $count !== 2 ) { |
| 242 | // Not a real WordPress SQLite database. |
| 243 | return new WP_Error( 'not-valid-sqlite-file', 'Query error: not a valid SQLite database' ); |
| 244 | } |
| 245 | |
| 246 | return true; |
| 247 | } |
| 248 | |
| 249 | /** |
| 250 | * Generate the table inserts. |
| 251 | * |
| 252 | * @param SQL_Generator $generator The SQL generator. |
| 253 | * @param string $table_name The table name. |
| 254 | * @param string $format The format string. |
| 255 | * @param string $field_names The field names. |
| 256 | * |
| 257 | * @return void|WP_Error |
| 258 | */ |
| 259 | private function generate_inserts( SQL_Generator $generator, string $table_name, string $format, string $field_names ) { |
| 260 | $entries = $this->db->query( "SELECT * FROM {$table_name}" ); |
| 261 | |
| 262 | if ( ! $entries ) { |
| 263 | return new WP_Error( 'missing-table', 'Query error: can\'t read source entry.' ); |
| 264 | } |
| 265 | |
| 266 | while ( $entry = $entries->fetchArray( SQLITE3_ASSOC ) ) { // phpcs:ignore Generic.CodeAnalysis.AssignmentInCondition.FoundInWhileCondition |
| 267 | // phpcs:ignore WordPress.DB.PreparedSQL.NotPrepared -- Prepared outside. |
| 268 | $generator->table_insert( $field_names, $this->prepare( $format, $entry ) ); |
| 269 | } |
| 270 | } |
| 271 | |
| 272 | /** |
| 273 | * Get the input table name without the prefix. |
| 274 | * |
| 275 | * @param string $table_name The table name. |
| 276 | * |
| 277 | * @return string |
| 278 | */ |
| 279 | private function get_input_table_name( string $table_name ): string { |
| 280 | return substr( $table_name, 0, strlen( $this->options['prefix'] ) ) === $this->options['prefix'] ? |
| 281 | substr( $table_name, strlen( $this->options['prefix'] ) ) : |
| 282 | $table_name; |
| 283 | } |
| 284 | |
| 285 | /** |
| 286 | * Get the output table name. |
| 287 | * |
| 288 | * @param string $table_name The table name. |
| 289 | * |
| 290 | * @return string |
| 291 | */ |
| 292 | private function get_output_table_name( string $table_name ): string { |
| 293 | // Add the temporary prefix, if needed. |
| 294 | $prefix = $this->options['tmp_tables'] ? $this->options['tmp_prefix'] : ''; |
| 295 | |
| 296 | // Add the output prefix, if needed. |
| 297 | $prefix .= $this->options['output_prefix'] ? $this->options['output_prefix'] : ''; |
| 298 | |
| 299 | return $prefix . $table_name; |
| 300 | } |
| 301 | |
| 302 | /** |
| 303 | * Get the table types map. |
| 304 | * |
| 305 | * @param string $table_name The table name. |
| 306 | * |
| 307 | * @return array|WP_Error |
| 308 | */ |
| 309 | private function get_table_types_map( string $table_name ) { |
| 310 | if ( ! $this->db ) { |
| 311 | return new WP_Error( 'no-database-connection', 'No database connection.' ); |
| 312 | } |
| 313 | |
| 314 | // Get the "type map" of the table. |
| 315 | // phpcs:ignore WordPress.DB.PreparedSQL.NotPrepared -- SQLITE_DATA_TYPES_TABLE is a constant string. |
| 316 | $query = $this->prepare( 'SELECT column_or_index, mysql_type from ' . self::SQLITE_DATA_TYPES_TABLE . ' where `table`=%s;', $table_name ); |
| 317 | $results = $this->db->query( $query ); |
| 318 | |
| 319 | if ( ! $results ) { |
| 320 | return new WP_Error( 'missing-types-cache', 'Query error: missing data types cache' ); |
| 321 | } |
| 322 | |
| 323 | $mysql_map = array(); |
| 324 | |
| 325 | // Schema: column_or_index|mysql_type |
| 326 | while ( $column = $results->fetchArray( SQLITE3_ASSOC ) ) { // phpcs:ignore Generic.CodeAnalysis.AssignmentInCondition.FoundInWhileCondition |
| 327 | // Hot fix: the default SQLite driver sometimes generate a column named `KEY`. |
| 328 | if ( $column['column_or_index'] === 'KEY' ) { |
| 329 | continue; |
| 330 | } |
| 331 | |
| 332 | // Map by column name and MySQL type. |
| 333 | $mysql_map[ $column['column_or_index'] ] = $column['mysql_type']; |
| 334 | } |
| 335 | |
| 336 | // Tables like `'_wp_sqlite_*` do not have entries in the `_mysql_data_types_cache` table. |
| 337 | // In this case, we return an empty map. |
| 338 | if ( empty( $mysql_map ) ) { |
| 339 | return array( |
| 340 | 'map' => array(), |
| 341 | 'auto_increment' => 0, |
| 342 | 'field_names' => null, |
| 343 | 'format' => null, |
| 344 | ); |
| 345 | } |
| 346 | |
| 347 | // Get the "table info" of the table. |
| 348 | $query = $this->prepare( 'PRAGMA TABLE_INFO(%s)', $table_name ); |
| 349 | $results = $this->db->query( $query ); |
| 350 | $primary_count = 0; |
| 351 | |
| 352 | if ( ! $results ) { |
| 353 | return new WP_Error( 'missing-table-info', 'Query error: missing table info' ); |
| 354 | } |
| 355 | |
| 356 | // Our map. |
| 357 | $map = array(); |
| 358 | $map_by_name = array(); |
| 359 | $index = 0; |
| 360 | $has_autoinc = true; |
| 361 | $formats = array(); |
| 362 | $field_names = array(); |
| 363 | |
| 364 | // Schema: cid|name|type|notnull|dflt_value|pk |
| 365 | while ( $column = $results->fetchArray( SQLITE3_ASSOC ) ) { // phpcs:ignore Generic.CodeAnalysis.AssignmentInCondition.FoundInWhileCondition |
| 366 | // Hot fix: skip `KEY` columns. |
| 367 | if ( $column['name'] === 'KEY' ) { |
| 368 | continue; |
| 369 | } |
| 370 | |
| 371 | $is_primary = $column['pk'] >= 1; |
| 372 | $field_names[] = $column['name']; |
| 373 | |
| 374 | if ( ! array_key_exists( $column['name'], $mysql_map ) ) { |
| 375 | return new WP_Error( |
| 376 | 'missing-column', |
| 377 | sprintf( 'Query error: not a valid SQLite table "%s", missing column "%s"', $table_name, $column['name'] ) |
| 378 | ); |
| 379 | } |
| 380 | |
| 381 | // Add map info. |
| 382 | $map[] = array( |
| 383 | 'name' => $column['name'], |
| 384 | 'type' => $mysql_map[ $column['name'] ], |
| 385 | 'sqlite_type' => $column['type'], |
| 386 | 'not_null' => (bool) $column['notnull'], |
| 387 | 'default' => $column['dflt_value'], |
| 388 | 'primary' => $is_primary, |
| 389 | 'auto_increment' => $is_primary, |
| 390 | ); |
| 391 | |
| 392 | $map_by_name[ $column['name'] ] = $index; |
| 393 | |
| 394 | if ( $is_primary ) { |
| 395 | ++$primary_count; |
| 396 | } |
| 397 | |
| 398 | $formats[] = $this->sqlite_type_to_format( $column['type'] ); |
| 399 | ++$index; |
| 400 | } |
| 401 | |
| 402 | // If the primary key is not a single column, then there is not autoincrement. |
| 403 | if ( $primary_count !== 1 ) { |
| 404 | $has_autoinc = false; |
| 405 | |
| 406 | foreach ( $map as $index => $column ) { |
| 407 | $map[ $index ]['auto_increment'] = false; |
| 408 | } |
| 409 | } |
| 410 | |
| 411 | // Load table indices. |
| 412 | $query = $this->prepare( 'SELECT name, sql FROM sqlite_master WHERE type=\'index\' AND tbl_name=%s', $table_name ); |
| 413 | $results = $this->db->query( $query ); |
| 414 | |
| 415 | if ( ! $results ) { |
| 416 | return new WP_Error( 'missing-table-indices', 'Query error: not a valid SQLite database' ); |
| 417 | } |
| 418 | |
| 419 | // Loop all indices. |
| 420 | // Schema: name|sql |
| 421 | while ( $column = $results->fetchArray( SQLITE3_ASSOC ) ) { // phpcs:ignore Generic.CodeAnalysis.AssignmentInCondition.FoundInWhileCondition |
| 422 | // Some SQLite columns are not indexed. See https://sqlite.org/forum/info/f16f8ed8666c5e97 |
| 423 | if ( ! array_key_exists( $column['name'], $mysql_map ) ) { |
| 424 | continue; |
| 425 | } |
| 426 | |
| 427 | if ( ! in_array( $mysql_map[ $column['name'] ], array( 'KEY', 'UNIQUE' ), true ) ) { |
| 428 | return new WP_Error( 'missing-index', 'Query error: not a valid SQLite database, missing index' ); |
| 429 | } |
| 430 | |
| 431 | // Strip out the index definition. |
| 432 | // wp_comments__comment_approved_date_gmt|CREATE INDEX "wp_comments__comment_approved_date_gmt" ON "wp_comments" ("comment_approved", "comment_date_gmt") |
| 433 | $split_query = explode( '" ON "' . $table_name . '" ', $column['sql'] ); |
| 434 | $real_name = SQL_Generator::get_index_name( $column['name'] ); |
| 435 | $new_index = array( |
| 436 | 'name' => $real_name, |
| 437 | 'type' => $mysql_map[ $column['name'] ], |
| 438 | 'columns' => str_replace( '"', '`', $split_query[1] ), |
| 439 | ); |
| 440 | |
| 441 | if ( array_key_exists( $real_name, $map_by_name ) ) { |
| 442 | $index = $map_by_name[ $real_name ]; |
| 443 | |
| 444 | if ( $this->needs_191_limit( $map[ $index ] ) ) { |
| 445 | // See wp_get_db_schema $max_index_length for more info about why '191' must be added. |
| 446 | $new_index['columns'] = str_replace( '`)', '`(191))', $new_index['columns'] ); |
| 447 | } |
| 448 | } |
| 449 | |
| 450 | $map[] = $new_index; |
| 451 | } |
| 452 | |
| 453 | // Hot fix: add the missing index sizes. |
| 454 | $map = $this->hot_fix_missing_indexes( $table_name, $map ); |
| 455 | |
| 456 | $auto_increment = 0; |
| 457 | |
| 458 | if ( $has_autoinc ) { |
| 459 | $auto_increment = $this->get_table_autoincrement( $table_name ); |
| 460 | } |
| 461 | |
| 462 | return array( |
| 463 | 'map' => $map, |
| 464 | 'auto_increment' => $auto_increment, |
| 465 | 'field_names' => '(`' . implode( '`,`', $field_names ) . '`)', |
| 466 | 'format' => '(' . implode( ',', $formats ) . ')', |
| 467 | ); |
| 468 | } |
| 469 | |
| 470 | /** |
| 471 | * Get the SQLite type to MySQL format. |
| 472 | * |
| 473 | * @param string $type The SQLite type. |
| 474 | * |
| 475 | * @return string |
| 476 | */ |
| 477 | private function sqlite_type_to_format( string $type ): string { |
| 478 | switch ( $type ) { |
| 479 | case 'integer': |
| 480 | return '%d'; |
| 481 | case 'real': |
| 482 | return '%f'; |
| 483 | case 'text': |
| 484 | return '%s'; |
| 485 | case 'blob': |
| 486 | return '%s'; |
| 487 | case 'null': |
| 488 | return '%s'; |
| 489 | default: |
| 490 | return '%s'; |
| 491 | } |
| 492 | } |
| 493 | |
| 494 | /** |
| 495 | * Check if the maximum index length of 191 must be added. |
| 496 | * |
| 497 | * @see wp_get_db_schema $max_index_length for more info. |
| 498 | * |
| 499 | * @param array $key_map The key map. |
| 500 | * |
| 501 | * @return bool |
| 502 | */ |
| 503 | public function needs_191_limit( array $key_map ): bool { |
| 504 | if ( $key_map['sqlite_type'] !== 'text' ) { |
| 505 | return false; |
| 506 | } |
| 507 | |
| 508 | // Check if the column type is a text type. |
| 509 | $ret = in_array( $key_map['type'], array( 'text', 'tinytext', 'mediumtext', 'longtext' ), true ); |
| 510 | |
| 511 | if ( $ret ) { |
| 512 | return $ret; |
| 513 | } |
| 514 | |
| 515 | // Check if the string is of type varchar(255). |
| 516 | $matches = null; |
| 517 | preg_match( '/varchar\((\d+)\)/', $key_map['type'], $matches ); |
| 518 | |
| 519 | if ( isset( $matches[1] ) ) { |
| 520 | // The limit must be added only if the column length is greater than 191. |
| 521 | return (int) $matches[1] > 191; |
| 522 | } |
| 523 | |
| 524 | return false; |
| 525 | } |
| 526 | |
| 527 | /** |
| 528 | * Get the table autoincrement value. |
| 529 | * |
| 530 | * @param string $table_name The table name. |
| 531 | * |
| 532 | * @return int |
| 533 | */ |
| 534 | private function get_table_autoincrement( $table_name ): int { |
| 535 | $query = $this->prepare( 'SELECT seq from ' . self::SQLITE_SEQUENCE_TABLE . ' WHERE name=%s', $table_name ); |
| 536 | |
| 537 | return $this->db->querySingle( $query ) ?? 0; |
| 538 | } |
| 539 | |
| 540 | /** |
| 541 | * Get an export random file name. |
| 542 | * |
| 543 | * @return string |
| 544 | */ |
| 545 | public function get_tmp_file_name(): string { |
| 546 | // A random string to avoid collisions. |
| 547 | return 'sqlite-export-' . uniqid() . '.sql'; |
| 548 | } |
| 549 | |
| 550 | /** |
| 551 | * Prepare a query. |
| 552 | * |
| 553 | * @param string $query The query. |
| 554 | * @param mixed ...$args The arguments. |
| 555 | * |
| 556 | * @return string|void |
| 557 | */ |
| 558 | private function prepare( $query, ...$args ) { |
| 559 | global $wpdb; |
| 560 | |
| 561 | $query = call_user_func_array( array( $wpdb, 'prepare' ), array_merge( array( $query ), $args ) ); |
| 562 | |
| 563 | if ( is_string( $query ) ) { |
| 564 | return $wpdb->remove_placeholder_escape( $query ); |
| 565 | } |
| 566 | } |
| 567 | |
| 568 | /** |
| 569 | * Hot fix: add the missing index sizes. The default SQLite driver do not |
| 570 | * generate index sizes and sometimes the indexes are not valid when made of |
| 571 | * multiple text and integer columns and are more than 191 characters. |
| 572 | * |
| 573 | * Known columns are from WooCommerce. |
| 574 | * |
| 575 | * Example: |
| 576 | * KEY `order_id_meta_key_meta_value` (`order_id`, `meta_key`, `meta_value`) |
| 577 | * |
| 578 | * should be: |
| 579 | * KEY `order_id_meta_key_meta_value` (`order_id`,`meta_key`(100),`meta_value`(82)) |
| 580 | * |
| 581 | * Once we have a better SQLite driver, we can remove this function. |
| 582 | * |
| 583 | * @param string $table_name The table name. |
| 584 | * @param array $map The columns map. |
| 585 | * |
| 586 | * @return array |
| 587 | */ |
| 588 | public function hot_fix_missing_indexes( string $table_name, array $map ) { |
| 589 | // Fix: the default SQLite driver do not generate save index sizes. |
| 590 | $fix_map = array( |
| 591 | 'wp_wc_orders' => array( |
| 592 | 'customer_id_billing_email' => '(`customer_id`,`billing_email`(171))', |
| 593 | ), |
| 594 | 'wp_wc_orders_meta' => array( |
| 595 | 'meta_key_value' => '(`meta_key`(100),`meta_value`(82))', |
| 596 | 'order_id_meta_key_meta_value' => '(`order_id`,`meta_key`(100),`meta_value`(82))', |
| 597 | ), |
| 598 | 'wp_woocommerce_downloadable_product_permissions' => array( |
| 599 | 'download_order_key_product' => '(`product_id`,`order_id`,`order_key`(16),`download_id`)', |
| 600 | ), |
| 601 | 'wp_woocommerce_shipping_zone_locations' => array( |
| 602 | 'location_type_code' => '(`location_type`(10),`location_code`(20))', |
| 603 | ), |
| 604 | 'wp_woocommerce_tax_rate_locations' => array( |
| 605 | 'location_type_code' => '(`location_type`(10),`location_code`(20))', |
| 606 | ), |
| 607 | ); |
| 608 | |
| 609 | if ( ! array_key_exists( $table_name, $fix_map ) ) { |
| 610 | // No fix for this table. |
| 611 | return $map; |
| 612 | } |
| 613 | |
| 614 | foreach ( $map as $i => $column ) { |
| 615 | if ( array_key_exists( $column['name'], $fix_map[ $table_name ] ) ) { |
| 616 | // Hot fix: add the missing index sizes. |
| 617 | $map[ $i ]['columns'] = $fix_map[ $table_name ][ $column['name'] ]; |
| 618 | } |
| 619 | } |
| 620 | |
| 621 | return $map; |
| 622 | } |
| 623 | |
| 624 | /** |
| 625 | * Check if the table is valid. |
| 626 | * |
| 627 | * @param string $table_name The table name. |
| 628 | * |
| 629 | * @return bool |
| 630 | */ |
| 631 | public function is_valid_table( string $table_name ): bool { |
| 632 | // Skip SQLite internal tables. |
| 633 | if ( $table_name === self::SQLITE_DATA_TYPES_TABLE || $table_name === self::SQLITE_SEQUENCE_TABLE ) { |
| 634 | return false; |
| 635 | } |
| 636 | |
| 637 | // Skip WordPress internal tables. |
| 638 | if ( strpos( $table_name, '_wp_sqlite' ) === 0 ) { |
| 639 | return false; |
| 640 | } |
| 641 | |
| 642 | return true; |
| 643 | } |
| 644 | } |