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Add/expand comments for PDO handlers
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@ -600,8 +600,7 @@ PHP_METHOD(PDO, beginTransaction)
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}
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if (!dbh->methods->begin) {
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/* TODO: this should be an exception; see the auto-commit mode
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* comments below */
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/* Throw an exception when the driver does not support transactions */
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zend_throw_exception_ex(php_pdo_get_exception(), 0, "This driver doesn't support transactions");
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RETURN_THROWS();
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}
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@ -904,6 +903,8 @@ PHP_METHOD(PDO, getAttribute)
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RETURN_FALSE;
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default:
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/* No error state, just return as the return_value has been assigned
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* by the get_attribute handler */
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return;
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}
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}
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@ -255,7 +255,11 @@ typedef char *(*pdo_dbh_last_id_func)(pdo_dbh_t *dbh, const char *name, size_t *
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* specific data ... */
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typedef int (*pdo_dbh_fetch_error_func)(pdo_dbh_t *dbh, pdo_stmt_t *stmt, zval *info);
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/* fetching of attributes */
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/* fetching of attributes
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* There are 3 return states:
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* * -1 for errors while retrieving a valid attribute
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* * 0 for attempting to retrieve an attribute which is not supported by the driver
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* * any other value for success, *val must be set to the attribute value */
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typedef int (*pdo_dbh_get_attr_func)(pdo_dbh_t *dbh, zend_long attr, zval *val);
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/* checking/pinging persistent connections; return SUCCESS if the connection
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