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<?php |
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declare(strict_types=1); |
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namespace Ivory\Exception; |
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use Ivory\Lang\Sql\SqlState; |
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/** |
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* Exception thrown upon errors on querying the database. |
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* |
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* The exception message contains the primary error message. To get the SQL State code, use {@link getSqlStateCode()} |
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* method. To recognize SQLSTATE codes, {@link \Ivory\Result\SqlState} constants might be helpful. Alternatively, |
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* {@link StatementException::getSqlState()} may be used to get an {@link SqlState} object. |
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* |
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* Besides the primary message and SQLSTATE code, the exception holds the error message detail, error hint, and all the |
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* other error diagnostic fields except those referring to PostgreSQL source code (those referred to by the PHP |
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* `PGSQL_DIAG_SOURCE_*` constants). |
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* |
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* This class is expected to be sub-classed by custom exception classes. *Any such subclasses are required to have the |
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* same constructor arguments as this class, and are required to pass these arguments to the constructor of this class.* |
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* See {@link StatementExceptionFactory} and its usages - either the global |
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* {@link \Ivory\Ivory::getStatementExceptionFactory()} or the local |
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* {@link \Ivory\Connection::getStatementExceptionFactory()} - for details on using custom statement exceptions. |
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*/ |
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class StatementException extends \RuntimeException |
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{ |
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private $query; |
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private $errorFields = []; |
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/** |
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* @param resource $resultHandler a PostgreSQL query result resource |
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* @param string $query the statement, as sent by the client, which caused the error |
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*/ |
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public function __construct($resultHandler, string $query) |
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{ |
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$message = self::inferMessage($resultHandler); |
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parent::__construct($message); // NOTE: SQL state code (string) cannot be used as the exception code (int) |
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$this->query = $query; |
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$fields = [ |
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PGSQL_DIAG_SQLSTATE, |
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PGSQL_DIAG_SEVERITY, |
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PGSQL_DIAG_MESSAGE_DETAIL, |
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PGSQL_DIAG_MESSAGE_HINT, |
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PGSQL_DIAG_STATEMENT_POSITION, |
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PGSQL_DIAG_INTERNAL_QUERY, |
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PGSQL_DIAG_INTERNAL_POSITION, |
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PGSQL_DIAG_CONTEXT, |
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]; |
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if (PHP_VERSION_ID >= 70300) { |
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/** @noinspection PhpUndefinedConstantInspection */ |
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$fields[] = PGSQL_DIAG_SEVERITY_NONLOCALIZED; |
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} |
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foreach ($fields as $f) { |
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$this->errorFields[$f] = pg_result_error_field($resultHandler, $f); |
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} |
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} |
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private static function inferMessage($resultHandler): string |
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{ |
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$message = pg_result_error_field($resultHandler, PGSQL_DIAG_MESSAGE_PRIMARY); |
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if (strlen($message) > 0) { |
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return $message; |
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} |
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switch (pg_result_status($resultHandler)) { |
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case PGSQL_EMPTY_QUERY: |
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return 'Empty query'; |
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case PGSQL_BAD_RESPONSE: |
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return "The server's response was not understood"; |
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case PGSQL_NONFATAL_ERROR: |
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return 'Non-fatal error'; |
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case PGSQL_FATAL_ERROR: |
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return 'Fatal error'; |
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default: |
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return 'Unknown error'; |
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} |
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} |
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final public function getSqlStateCode(): string |
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{ |
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return $this->errorFields[PGSQL_DIAG_SQLSTATE]; |
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} |
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final public function getSqlState(): SqlState |
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{ |
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return SqlState::fromCode($this->getSqlStateCode()); |
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} |
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/** |
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* @return string the severity of the error; |
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* one of <tt>ERROR</tt>, <tt>FATAL</tt>, or <tt>PANIC</tt> (for errors), or <tt>WARNING</tt>, |
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* <tt>NOTICE</tt>, <tt>DEBUG</tt>, <tt>INFO</tt>, or <tt>LOG</tt> (in a notice message), or a |
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* localized translation of one of these |
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*/ |
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final public function getSeverity(): string |
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{ |
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return $this->errorFields[PGSQL_DIAG_SEVERITY]; |
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} |
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/** |
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* @return string the nonlocalized severity of the error; |
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* one of <tt>ERROR</tt>, <tt>FATAL</tt>, or <tt>PANIC</tt> (for errors), or <tt>WARNING</tt>, |
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* <tt>NOTICE</tt>, <tt>DEBUG</tt>, <tt>INFO</tt>, or <tt>LOG</tt> (in a notice message) |
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*/ |
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final public function getNonlocalizedSeverity(): string |
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{ |
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if (PHP_VERSION_ID >= 70300) { |
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/** @noinspection PhpUndefinedConstantInspection */ |
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return $this->errorFields[PGSQL_DIAG_SEVERITY_NONLOCALIZED]; |
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} else { |
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throw new UnsupportedException('Nonlocalized severity is only supported on PHP >= 7.3'); |
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} |
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} |
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/** |
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* @return string|null the detailed message, if any |
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*/ |
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final public function getMessageDetail(): ?string |
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{ |
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return $this->errorFields[PGSQL_DIAG_MESSAGE_DETAIL]; |
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} |
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/** |
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* @return string|null the message hint, if any |
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*/ |
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final public function getMessageHint(): ?string |
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{ |
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return $this->errorFields[PGSQL_DIAG_MESSAGE_HINT]; |
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} |
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/** |
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* @return string the original statement, as sent by the client, which caused the error |
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*/ |
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final public function getQuery(): string |
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{ |
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return $this->query; |
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} |
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/** |
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* @return int|null position of the error within the original statement, returned by {@link getQuery()}; |
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* one-based, measured in characters (not bytes) |
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*/ |
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final public function getStatementPosition(): ?int |
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{ |
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return $this->errorFields[PGSQL_DIAG_STATEMENT_POSITION]; |
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} |
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/** |
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* @return string|null the text of the internally-generated query which actually caused the error (if any); |
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* e.g., a query issued from within a PostgreSQL function |
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*/ |
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final public function getInternalQuery(): ?string |
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{ |
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return $this->errorFields[PGSQL_DIAG_INTERNAL_QUERY]; |
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} |
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/** |
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* @return int|null position of the error within the {@link getInternalQuery() internally-generated query} which |
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* actually caused the error (if any); |
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* one-based, measured in characters (not bytes) |
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*/ |
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final public function getInternalPosition(): ?int |
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{ |
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return $this->errorFields[PGSQL_DIAG_INTERNAL_POSITION]; |
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} |
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/** |
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* @return string|null the PostgreSQL context of the error; e.g., the stack trace of functions and internal queries |
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*/ |
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final public function getContext(): ?string |
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{ |
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return $this->errorFields[PGSQL_DIAG_CONTEXT]; |
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} |
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} |
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