| 1 |
<?php |
| 2 |
|
| 3 |
if (!defined('ABSPATH')) { |
| 4 |
exit; |
| 5 |
} |
| 6 |
|
| 7 |
class ABJ_404_Solution_DatabaseUpgradeSchemaDiff extends ABJ_404_Solution_DatabaseUpgradeComponent { |
| 8 |
|
| 9 |
/** |
| 10 |
* @param string $tableName |
| 11 |
* @param string $createTableStatementGoal |
| 12 |
* @return void |
| 13 |
*/ |
| 14 |
function verifyColumns($tableName, $createTableStatementGoal) { |
| 15 |
$tableName = is_scalar($tableName) ? (string)$tableName : ''; |
| 16 |
$updatesWereNeeded = false; |
| 17 |
|
| 18 |
// find the differences |
| 19 |
$tableDifferences = $this->getTableDifferences($tableName, $createTableStatementGoal); |
| 20 |
$tableDifferences = is_array($tableDifferences) ? $tableDifferences : []; |
| 21 |
$updateCols = is_array($tableDifferences['updateTheseColumns']) ? $tableDifferences['updateTheseColumns'] : []; |
| 22 |
$createCols = is_array($tableDifferences['createTheseColumns']) ? $tableDifferences['createTheseColumns'] : []; |
| 23 |
if (count($updateCols) > 0 || |
| 24 |
count($createCols) > 0) { |
| 25 |
$updatesWereNeeded = true; |
| 26 |
} |
| 27 |
// make the changes |
| 28 |
$this->updateATableBasedOnDifferences($tableName, $tableDifferences); |
| 29 |
|
| 30 |
// verify that there are now no changes that need to be made. |
| 31 |
$tableDifferences = $this->getTableDifferences($tableName, $createTableStatementGoal); |
| 32 |
$tableDifferences = is_array($tableDifferences) ? $tableDifferences : []; |
| 33 |
$updateCols = is_array($tableDifferences['updateTheseColumns']) ? $tableDifferences['updateTheseColumns'] : []; |
| 34 |
$createCols = is_array($tableDifferences['createTheseColumns']) ? $tableDifferences['createTheseColumns'] : []; |
| 35 |
|
| 36 |
if (count($updateCols) > 0 || |
| 37 |
count($createCols) > 0) { |
| 38 |
|
| 39 |
// Persistent post-update diff is usually a benign DDL-normalizer mismatch |
| 40 |
// (parser misreads a comment, column landed in a slightly-different form). |
| 41 |
// Plugin keeps functioning, so log at warn (stays in debug log without |
| 42 |
// crossing the email-threshold reporter). Defensive coding philosophy #8. |
| 43 |
$this->logger->warn("There are still differences after updating the " . |
| 44 |
$tableName . " table. " . print_r($tableDifferences, true)); |
| 45 |
|
| 46 |
} else if ($updatesWereNeeded) { |
| 47 |
$this->logger->infoMessage("No more differences found after updating the " . |
| 48 |
$tableName . " table columns. All is well."); |
| 49 |
} |
| 50 |
} |
| 51 |
|
| 52 |
/** |
| 53 |
* @param string $tableName |
| 54 |
* @param string $createTableStatementGoal |
| 55 |
* @return array<string, mixed> |
| 56 |
*/ |
| 57 |
function getTableDifferences($tableName, $createTableStatementGoal) { |
| 58 |
|
| 59 |
// get the current create table statement |
| 60 |
$existingTableSQL = $this->dbCore->tableNameResolver()->getCreateTableDDL($tableName); |
| 61 |
|
| 62 |
$existingTableSQL = strtolower($this->removeCommentsFromColumns($existingTableSQL)); |
| 63 |
$createTableStatementGoal = strtolower( |
| 64 |
$this->removeCommentsFromColumns($createTableStatementGoal)); |
| 65 |
|
| 66 |
// remove the "COLLATE xxx" from the columns. |
| 67 |
$removeCollatePattern = '/collate[= ]\w+ ?/'; |
| 68 |
$existingTableSQL = preg_replace($removeCollatePattern, "", $existingTableSQL) ?? ''; |
| 69 |
$createTableStatementGoal = preg_replace($removeCollatePattern, "", $createTableStatementGoal) ?? ''; |
| 70 |
|
| 71 |
// remove the int size format from columns because it doesn't matter. |
| 72 |
$removeIntSizePattern = '/( \w*?int)(\(\d+\))/m'; |
| 73 |
$existingTableSQL = preg_replace($removeIntSizePattern, "$1", $existingTableSQL) ?? ''; |
| 74 |
$createTableStatementGoal = preg_replace($removeIntSizePattern, "$1", $createTableStatementGoal) ?? ''; |
| 75 |
|
| 76 |
// MySQL's SHOW CREATE TABLE omits "DEFAULT NULL" for TEXT/BLOB columns |
| 77 |
// (it's implicit). Normalize both sides so this doesn't flag as a mismatch. |
| 78 |
$removeTextDefaultNull = '/(text|blob|mediumtext|longtext|tinytext|mediumblob|longblob|tinyblob)\s+default\s+null/'; |
| 79 |
$existingTableSQL = preg_replace($removeTextDefaultNull, "$1", $existingTableSQL) ?? $existingTableSQL; |
| 80 |
$createTableStatementGoal = preg_replace($removeTextDefaultNull, "$1", $createTableStatementGoal) ?? $createTableStatementGoal; |
| 81 |
|
| 82 |
// get column names and types pattern (backticks are optional — accept both styles); |
| 83 |
// (?!key\b) guards against accidentally matching PRIMARY KEY / UNIQUE KEY lines. |
| 84 |
$colNamesAndTypesPattern = "/\s+?(`?(\w+?)`? (?!key\b)(\w.+)\s?),/"; |
| 85 |
$existingTableMatches = null; |
| 86 |
$goalTableMatches = null; |
| 87 |
// match the existing table. use preg_match_all because I couldn't find an |
| 88 |
// "_all" option when using mb_ereg. |
| 89 |
preg_match_all($colNamesAndTypesPattern, $existingTableSQL, $existingTableMatches); |
| 90 |
preg_match_all($colNamesAndTypesPattern, $createTableStatementGoal, $goalTableMatches); |
| 91 |
|
| 92 |
// get the matches. |
| 93 |
$goalTableMatchesColumnNames = $goalTableMatches[2]; |
| 94 |
$existingTableMatchesColumnNames = $existingTableMatches[2]; |
| 95 |
|
| 96 |
// remove any spaces |
| 97 |
$goalTableMatchesColumnNames = array_map('trim', $goalTableMatchesColumnNames); |
| 98 |
$existingTableMatchesColumnNames = array_map('trim', $existingTableMatchesColumnNames); |
| 99 |
|
| 100 |
// Safety guard: if the goal DDL produced zero column names the regex failed |
| 101 |
// to parse it (e.g. malformed or unparseable DDL). In that case never drop |
| 102 |
// any existing columns — an empty goal list would otherwise flag every real |
| 103 |
// column as "extra" and wipe the table. |
| 104 |
if (empty($goalTableMatchesColumnNames) && !empty($existingTableMatchesColumnNames)) { |
| 105 |
$this->logger->errorMessage("Goal DDL for " . $tableName . |
| 106 |
" produced no column matches -- the DDL may be malformed or unparseable. " . |
| 107 |
"Skipping column comparison to prevent data loss."); |
| 108 |
$dropTheseColumns = []; |
| 109 |
$createTheseColumns = []; |
| 110 |
return array("updateTheseColumns" => [], |
| 111 |
"dropTheseColumns" => [], |
| 112 |
"createTheseColumns" => [], |
| 113 |
"goalTableMatchesColumnDDL" => [], |
| 114 |
"existingTableMatchesColumnDDL" => [], |
| 115 |
"goalTableMatches" => $goalTableMatches, |
| 116 |
"goalTableMatchesColumnNames" => [] |
| 117 |
); |
| 118 |
} |
| 119 |
|
| 120 |
// see if some columns need to be created. |
| 121 |
$dropTheseColumns = array_diff($existingTableMatchesColumnNames, |
| 122 |
$goalTableMatchesColumnNames); |
| 123 |
$createTheseColumns = array_diff($goalTableMatchesColumnNames, |
| 124 |
$existingTableMatchesColumnNames); |
| 125 |
|
| 126 |
// get the ddl for each column |
| 127 |
$goalTableMatchesColumnDDL = $goalTableMatches[1]; |
| 128 |
$existingTableMatchesColumnDDL = $existingTableMatches[1]; |
| 129 |
|
| 130 |
// remove any spaces |
| 131 |
$goalTableMatchesColumnDDL = array_map('trim', $goalTableMatchesColumnDDL); |
| 132 |
$existingTableMatchesColumnDDL = array_map('trim', $existingTableMatchesColumnDDL); |
| 133 |
|
| 134 |
// normalize minor differences between mysql versions (strip backticks so DDL |
| 135 |
// files using either quoting style compare equal to SHOW CREATE TABLE output) |
| 136 |
$goalTableMatchesColumnDDL = array_map([$this, 'normalizeColumnDDL'], $goalTableMatchesColumnDDL); |
| 137 |
$existingTableMatchesColumnDDL = array_map([$this, 'normalizeColumnDDL'], $existingTableMatchesColumnDDL); |
| 138 |
|
| 139 |
// see if anything needs to be updated or created. |
| 140 |
$updateTheseColumns = array_diff($goalTableMatchesColumnDDL, |
| 141 |
$existingTableMatchesColumnDDL); |
| 142 |
|
| 143 |
// wrap the results |
| 144 |
$results = array("updateTheseColumns" => $updateTheseColumns, |
| 145 |
"dropTheseColumns" => $dropTheseColumns, |
| 146 |
"createTheseColumns" => $createTheseColumns, |
| 147 |
"goalTableMatchesColumnDDL" => $goalTableMatchesColumnDDL, |
| 148 |
"existingTableMatchesColumnDDL" => $existingTableMatchesColumnDDL, |
| 149 |
"goalTableMatches" => $goalTableMatches, |
| 150 |
"goalTableMatchesColumnNames" => $goalTableMatchesColumnNames |
| 151 |
); |
| 152 |
return $results; |
| 153 |
} |
| 154 |
|
| 155 |
/** |
| 156 |
* @param string $tableName |
| 157 |
* @param array<string, mixed> $tableDifferences |
| 158 |
* @return void |
| 159 |
*/ |
| 160 |
function updateATableBasedOnDifferences($tableName, $tableDifferences) { |
| 161 |
$tableName = is_scalar($tableName) ? (string)$tableName : ''; |
| 162 |
$tableDifferences = is_array($tableDifferences) ? $tableDifferences : []; |
| 163 |
|
| 164 |
/** @var array<int, string> $dropTheseColumns */ |
| 165 |
$dropTheseColumns = is_array($tableDifferences['dropTheseColumns']) |
| 166 |
? $this->stringValues($tableDifferences['dropTheseColumns']) |
| 167 |
: []; |
| 168 |
/** @var array<int, string> $updateTheseColumns */ |
| 169 |
$updateTheseColumns = is_array($tableDifferences['updateTheseColumns']) |
| 170 |
? $this->stringValues($tableDifferences['updateTheseColumns']) |
| 171 |
: []; |
| 172 |
/** @var array<int, string> $createTheseColumns */ |
| 173 |
$createTheseColumns = is_array($tableDifferences['createTheseColumns']) |
| 174 |
? $this->stringValues($tableDifferences['createTheseColumns']) |
| 175 |
: []; |
| 176 |
$goalTableMatchesColumnDDL = is_array($tableDifferences['goalTableMatchesColumnDDL']) |
| 177 |
? $this->stringValues($tableDifferences['goalTableMatchesColumnDDL']) |
| 178 |
: []; |
| 179 |
$existingTableMatchesColumnDDL = is_array($tableDifferences['existingTableMatchesColumnDDL']) |
| 180 |
? $this->stringValues($tableDifferences['existingTableMatchesColumnDDL']) |
| 181 |
: []; |
| 182 |
/** @var array<int, array<int, mixed>> $goalTableMatches */ |
| 183 |
$goalTableMatches = is_array($tableDifferences['goalTableMatches']) ? $tableDifferences['goalTableMatches'] : []; |
| 184 |
/** @var array<int, string> $goalTableMatchesColumnNames */ |
| 185 |
$goalTableMatchesColumnNames = is_array($tableDifferences['goalTableMatchesColumnNames']) |
| 186 |
? $this->stringValues($tableDifferences['goalTableMatchesColumnNames']) |
| 187 |
: []; |
| 188 |
|
| 189 |
// drop unnecessary columns — but never drop ALL columns (MySQL error: |
| 190 |
// "You can't delete all columns with ALTER TABLE; use DROP TABLE instead"). |
| 191 |
// This happens when a table is completely restructured and every existing |
| 192 |
// column name differs from the goal schema. |
| 193 |
$existingColumnCount = count($existingTableMatchesColumnDDL); |
| 194 |
if (count($dropTheseColumns) > 0 && count($dropTheseColumns) >= $existingColumnCount) { |
| 195 |
$this->logger->warn("Skipping column drops on " . $tableName . |
| 196 |
" because it would remove all " . $existingColumnCount . |
| 197 |
" existing columns. Drops requested: " . implode(', ', $dropTheseColumns)); |
| 198 |
} else { |
| 199 |
foreach ($dropTheseColumns as $colName) { |
| 200 |
$colName = (string)$colName; |
| 201 |
$query = "alter table " . $tableName . " drop " . $colName; |
| 202 |
$this->dbCore->queryAndGetResults($query); |
| 203 |
$this->logger->infoMessage("I dropped a column (1): " . $query); |
| 204 |
} |
| 205 |
} |
| 206 |
|
| 207 |
// say why we're doing what we're doing. |
| 208 |
if (count($updateTheseColumns) > 0) { |
| 209 |
$this->logger->infoMessage($this->getUpgradeRuntimeId() . ": On " . $tableName . |
| 210 |
" I'm updating various columns because we want: \n`" . |
| 211 |
print_r($goalTableMatchesColumnDDL, true) . "\n but we have: \n" . |
| 212 |
print_r($existingTableMatchesColumnDDL, true)); |
| 213 |
} |
| 214 |
|
| 215 |
// create missing columns |
| 216 |
// Normalize $goalMatchesSub using the same normalizeColumnDDL() that |
| 217 |
// getTableDifferences() uses, so array_search() can find the right index. |
| 218 |
$goalMatchesSub = is_array($goalTableMatches[1] ?? null) ? $this->stringValues($goalTableMatches[1]) : []; |
| 219 |
$goalMatchesSub = array_map([$this, 'normalizeColumnDDL'], $goalMatchesSub); |
| 220 |
foreach ($updateTheseColumns as $colDDL) { |
| 221 |
$colDDL = (string)$colDDL; |
| 222 |
// find the colum name. |
| 223 |
$matchIndex = array_search($colDDL, $goalMatchesSub); |
| 224 |
if ($matchIndex === false) { |
| 225 |
$this->logger->warn("Could not match column DDL to goal schema, skipping: " . $colDDL); |
| 226 |
continue; |
| 227 |
} |
| 228 |
$colName = is_scalar($goalTableMatchesColumnNames[$matchIndex] ?? null) |
| 229 |
? (string)$goalTableMatchesColumnNames[$matchIndex] |
| 230 |
: ''; |
| 231 |
|
| 232 |
// if the column exists then update it. otherwise create it. |
| 233 |
if (!in_array($colName, $createTheseColumns)) { |
| 234 |
// update the existing column. |
| 235 |
// ALTER TABLE `mywp_abj404_redirects` CHANGE `status` `status` BIGINT(19) NOT NULL; |
| 236 |
$updateColStatement = "alter table " . $tableName . " change " . $colName . |
| 237 |
" " . $colDDL; |
| 238 |
$this->dbCore->queryAndGetResults($updateColStatement); |
| 239 |
$this->logger->infoMessage("I updated a column: " . $updateColStatement); |
| 240 |
|
| 241 |
} else { |
| 242 |
// create the column. |
| 243 |
$createColStatement = "alter table " . $tableName . " add " . $colDDL; |
| 244 |
$this->dbCore->queryAndGetResults($createColStatement); |
| 245 |
$this->logger->infoMessage("I added a column: " . $createColStatement); |
| 246 |
} |
| 247 |
|
| 248 |
$this->upgrades()->bootstrapUpgrade()->handleSpecificCases($tableName, $colName); |
| 249 |
} |
| 250 |
} |
| 251 |
|
| 252 |
/** Create table DDL is returned without SQL comments of any kind. |
| 253 |
* Strips block comments (slash-star ... star-slash), line comments (-- ...), |
| 254 |
* and inline COMMENT 'text' column clauses so the column-name regex in |
| 255 |
* getTableDifferences() cannot mistake comment text for column definitions. |
| 256 |
* @param string|null $createTableDDL |
| 257 |
* @return string |
| 258 |
*/ |
| 259 |
function removeCommentsFromColumns($createTableDDL) { |
| 260 |
if ($createTableDDL === null) { |
| 261 |
return ''; |
| 262 |
} |
| 263 |
$ddl = (string) $createTableDDL; |
| 264 |
// Strip block comments (slash-star ... star-slash), including multi-line. |
| 265 |
$ddl = preg_replace('/\/\*.*?\*\//s', '', $ddl) ?? $ddl; |
| 266 |
// Strip line comments (-- ...). |
| 267 |
$ddl = preg_replace('/--[^\r\n]*/', '', $ddl) ?? $ddl; |
| 268 |
// Strip inline COMMENT 'text', clauses from column definitions. |
| 269 |
return preg_replace('/ (?:COMMENT.+?,[\r\n])/', ",\n", $ddl) ?? $ddl; |
| 270 |
} |
| 271 |
/** |
| 272 |
* Normalize a single column DDL fragment for comparison. |
| 273 |
* |
| 274 |
* Strips backticks and unquotes integer defaults so that DDL from |
| 275 |
* SHOW CREATE TABLE (e.g. default '1') matches the goal DDL file |
| 276 |
* (e.g. default 1). Used by both getTableDifferences() and |
| 277 |
* updateATableBasedOnDifferences() — a single source of truth |
| 278 |
* prevents the two normalization sites from drifting out of sync. |
| 279 |
* |
| 280 |
* @param mixed $ddl A column DDL string (or non-string from regex match) |
| 281 |
* @return string |
| 282 |
*/ |
| 283 |
function normalizeColumnDDL($ddl): string { |
| 284 |
$ddlStr = is_string($ddl) ? $ddl : ''; |
| 285 |
$normalized = strtolower(str_replace('`', '', trim($ddlStr))); |
| 286 |
$normalized = preg_replace("/default '(\d+)'/", 'default $1', $normalized) ?? $normalized; |
| 287 |
// MySQL omits DEFAULT NULL for nullable columns — strip it so DDL file |
| 288 |
// and SHOW CREATE TABLE produce identical normalized strings. |
| 289 |
$normalized = preg_replace('/\s+default\s+null\b/', '', $normalized) ?? $normalized; |
| 290 |
return $normalized; |
| 291 |
} |
| 292 |
|
| 293 |
/** |
| 294 |
* @param array<int|string, mixed> $values |
| 295 |
* @return array<int, string> |
| 296 |
*/ |
| 297 |
private function stringValues(array $values): array { |
| 298 |
$result = []; |
| 299 |
foreach ($values as $value) { |
| 300 |
if (is_scalar($value)) { |
| 301 |
$result[] = (string)$value; |
| 302 |
} |
| 303 |
} |
| 304 |
return $result; |
| 305 |
} |
| 306 |
|
| 307 |
/** |
| 308 |
* @param string $tableName |
| 309 |
* @return void |
| 310 |
*/ |
| 311 |
function deleteIndexes($tableName) { |
| 312 |
|
| 313 |
// get the indexes list. |
| 314 |
$results = $this->dbCore->queryAndGetResults("show index from " . $tableName . |
| 315 |
" where key_name != 'PRIMARY'"); |
| 316 |
/** @var array<int, array<string, mixed>> $rows */ |
| 317 |
$rows = isset($results['rows']) && is_array($results['rows']) ? $results['rows'] : []; |
| 318 |
|
| 319 |
if (empty($rows)) { |
| 320 |
return; |
| 321 |
} |
| 322 |
|
| 323 |
// find the key_name column because the case can be different on different systems. |
| 324 |
$keyNameColumn = 'key_name'; |
| 325 |
$aRow = $rows[0]; |
| 326 |
foreach (array_keys($aRow) as $someKey) { |
| 327 |
if ($this->f->strtolower((string)$someKey) == 'key_name') { |
| 328 |
$keyNameColumn = (string)$someKey; |
| 329 |
break; |
| 330 |
} |
| 331 |
} |
| 332 |
|
| 333 |
foreach ($rows as $row) { |
| 334 |
// delete them |
| 335 |
$indexName = $row[$keyNameColumn] ?? ''; |
| 336 |
if (!is_string($indexName) || $indexName === '') { |
| 337 |
continue; |
| 338 |
} |
| 339 |
$query = "alter table " . $tableName . " drop index " . $indexName; |
| 340 |
$this->dbCore->queryAndGetResults($query); |
| 341 |
} |
| 342 |
} |
| 343 |
|
| 344 |
} |
| 345 |
|
