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Fix bug #54379 PDO_OCI: UTF-8 output gets truncated #2276

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Fix bug #54379 PDO_OCI: UTF-8 output gets truncated #2276

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7 changes: 7 additions & 0 deletions ext/pdo_oci/oci_driver.c
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Original file line number Diff line number Diff line change
Expand Up @@ -699,6 +699,13 @@ static int pdo_oci_handle_factory(pdo_dbh_t *dbh, zval *driver_options) /* {{{ *
goto cleanup;
}

/* Get max character width */
H->last_err = OCINlsNumericInfoGet(H->env, H->err, &H->max_char_width, OCI_NLS_CHARSET_MAXBYTESZ);
if (H->last_err) {
oci_drv_error("OCINlsNumericInfoGet: OCI_NLS_CHARSET_MAXBYTESZ");
goto cleanup;
}

dbh->methods = &oci_methods;
dbh->alloc_own_columns = 1;
dbh->native_case = PDO_CASE_UPPER;
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5 changes: 2 additions & 3 deletions ext/pdo_oci/oci_statement.c
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Expand Up @@ -602,9 +602,8 @@ static int oci_stmt_describe(pdo_stmt_t *stmt, int colno) /* {{{ */
} else {
S->cols[colno].datalen = (ub4) col->maxlen;
}
if (dtype == SQLT_BIN) {
S->cols[colno].datalen *= 3;
}

S->cols[colno].datalen *= S->H->max_char_width;
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@cjbj cjbj Jan 25, 2017 •
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Lines 602-606 need to be:

            } else if (dtype == SQLT_BIN){
                S->cols[colno].datalen = (ub4) col->maxlen * 2; // raw characters to hex digits
            } else {
                S->cols[colno].datalen = (ub4) (col->maxlen * S->H->max_char_width);
            }

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Rationale from the developer who looked at it is:
"Given raw data(SQLT_BIN) is defined as SQLT_CHR (See line #609), raw is returned as strings. So 1 byte raw is represented as two bytes of hex digits.
For example, a 1-byte raw data 'FF' is converted to two 'F' characters. So we need to multiply by 2 (not 3) to accommodate the translation of raw to hex digits. max_char_width should be used for character strings.

Apart from that, other changes all look good including the testcase. The test would normally be skipped in the test suite as a UTF-8 DSN is required.

But we can see the skip reason in the test result and run it manually if required."

S->cols[colno].data = emalloc(S->cols[colno].datalen + 1);
dtype = SQLT_CHR;

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1 change: 1 addition & 0 deletions ext/pdo_oci/php_pdo_oci_int.h
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Expand Up @@ -38,6 +38,7 @@ typedef struct {
ub4 prefetch;
ub2 charset;
sword last_err;
sb4 max_char_width;

unsigned attached:1;
unsigned _reserved:31;
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47 changes: 47 additions & 0 deletions ext/pdo_oci/tests/bug54379.phpt
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@@ -0,0 +1,47 @@
--TEST--
Bug #54379 (PDO_OCI: UTF-8 output gets truncated)
--SKIPIF--
<?php
if (!extension_loaded('pdo') || !extension_loaded('pdo_oci'))
die('skip not loaded');
require dirname(__FILE__).'/../../pdo/tests/pdo_test.inc';
if (!preg_match('/charset=.*utf8/i', getenv('PDOTEST_DSN')))
die('skip not UTF8 DSN');
PDOTest::skip();
?>
--FILE--
<?php
require 'ext/pdo/tests/pdo_test.inc';
$db = PDOTest::test_factory('ext/pdo_oci/tests/common.phpt');
$db->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);

try {
$db->exec("DROP TABLE test");
} catch (Exception $e) {
}

$db->exec("CREATE TABLE test (col1 NVARCHAR2(100))");
$db->exec("INSERT INTO test VALUES('12345678901234567890')");
$db->exec("INSERT INTO test VALUES('Русские символы по три байта')");

$stmt = $db->prepare("SELECT * FROM test");

$stmt->execute();
var_dump($stmt->fetchAll(PDO::FETCH_ASSOC));

$db->exec("DROP TABLE test");

?>
--EXPECTF--
array(2) {
[0]=>
array(1) {
["col1"]=>
string(20) "12345678901234567890"
}
[1]=>
array(1) {
["col1"]=>
string(52) "Русские символы по три байта"
}
}