Fix #74243: allow locales.conf to drive datetime format

Add a driver attribute, PDO::DBLIB_ATTR_DATETIME_CONVERT, to control.

NEWS

@@ -79,6 +79,7 @@ PHP                                                                        NEWS
 - PDO_DBlib:
   . Implemented request #69592 (allow 0-column rowsets to be skipped
     automatically). (fandrieu)
+  . Fixed bug #74243 (allow locales.conf to drive datetime format). (fandrieu)
 
 - PDO_OCI:
   . Fixed bug #74631 (PDO_PCO with PHP-FPM: OCI environment initialized

ext/pdo_dblib/dblib_driver.c

@@ -290,6 +290,9 @@ static int dblib_set_attr(pdo_dbh_t *dbh, zend_long attr, zval *val)
 		case PDO_DBLIB_ATTR_SKIP_EMPTY_ROWSETS:
 			H->skip_empty_rowsets = zval_is_true(val);
 			return 1;
+		case PDO_DBLIB_ATTR_DATETIME_CONVERT:
+			H->datetime_convert = zval_get_long(val);
+			return 1;
 		default:
 			return 0;
 	}
@@ -321,6 +324,10 @@ static int dblib_get_attribute(pdo_dbh_t *dbh, zend_long attr, zval *return_valu
 			ZVAL_BOOL(return_value, H->skip_empty_rowsets);
 			break;
 
+		case PDO_DBLIB_ATTR_DATETIME_CONVERT:
+			ZVAL_BOOL(return_value, H->datetime_convert);
+			break;
+
 		default:
 			return 0;
 	}
@@ -395,6 +402,7 @@ static int pdo_dblib_handle_factory(pdo_dbh_t *dbh, zval *driver_options)
 	H->assume_national_character_set_strings = 0;
 	H->stringify_uniqueidentifier = 0;
 	H->skip_empty_rowsets = 0;
+	H->datetime_convert = 0;
 
 	if (!H->login) {
 		goto cleanup;
@@ -418,6 +426,7 @@ static int pdo_dblib_handle_factory(pdo_dbh_t *dbh, zval *driver_options)
 		H->assume_national_character_set_strings = pdo_attr_lval(driver_options, PDO_ATTR_DEFAULT_STR_PARAM, 0) == PDO_PARAM_STR_NATL ? 1 : 0;
 		H->stringify_uniqueidentifier = pdo_attr_lval(driver_options, PDO_DBLIB_ATTR_STRINGIFY_UNIQUEIDENTIFIER, 0);
 		H->skip_empty_rowsets = pdo_attr_lval(driver_options, PDO_DBLIB_ATTR_SKIP_EMPTY_ROWSETS, 0);
+		H->datetime_convert = pdo_attr_lval(driver_options, PDO_DBLIB_ATTR_DATETIME_CONVERT, 0);
 	}
 
 	DBERRHANDLE(H->login, (EHANDLEFUNC) pdo_dblib_error_handler);

ext/pdo_dblib/dblib_stmt.c

@@ -260,6 +260,51 @@ static int pdo_dblib_stmt_describe(pdo_stmt_t *stmt, int colno)
 	return 1;
 }
 
+static int pdo_dblib_stmt_stringify_col(pdo_stmt_t *stmt, int coltype)
+{
+	pdo_dblib_stmt *S = (pdo_dblib_stmt*)stmt->driver_data;
+	pdo_dblib_db_handle *H = S->H;
+
+	switch (coltype) {
+		case SQLDECIMAL:
+		case SQLNUMERIC:
+		case SQLMONEY:
+		case SQLMONEY4:
+		case SQLMONEYN:
+		case SQLFLT4:
+		case SQLFLT8:
+		case SQLINT4:
+		case SQLINT2:
+		case SQLINT1:
+		case SQLBIT:
+			if (stmt->dbh->stringify) {
+				return 1;
+			}
+			break;
+
+		case SQLINT8:
+			if (stmt->dbh->stringify) {
+				return 1;
+			}
+
+			/* force stringify if DBBIGINT won't fit in zend_long */
+			/* this should only be an issue for 32-bit machines */
+			if (sizeof(zend_long) < sizeof(DBBIGINT)) {
+				return 1;
+			}
+			break;
+
+		case SQLDATETIME:
+		case SQLDATETIM4:
+			if (H->datetime_convert) {
+				return 1;
+			}
+			break;
+	}
+
+	return 0;
+}
+
 static int pdo_dblib_stmt_get_col(pdo_stmt_t *stmt, int colno, char **ptr,
 	 zend_ulong *len, int *caller_frees)
 {
@@ -278,35 +323,15 @@ static int pdo_dblib_stmt_get_col(pdo_stmt_t *stmt, int colno, char **ptr,
 	data_len = dbdatlen(H->link, colno+1);
 
 	if (data_len != 0 || data != NULL) {
-		/* force stringify if DBBIGINT won't fit in zend_long */
-		/* this should only be an issue for 32-bit machines */
-		if (stmt->dbh->stringify || (coltype == SQLINT8 && sizeof(zend_long) < sizeof(DBBIGINT))) {
-			switch (coltype) {
-				case SQLDECIMAL:
-				case SQLNUMERIC:
-				case SQLMONEY:
-				case SQLMONEY4:
-				case SQLMONEYN:
-				case SQLFLT4:
-				case SQLFLT8:
-				case SQLINT8:
-				case SQLINT4:
-				case SQLINT2:
-				case SQLINT1:
-				case SQLBIT: {
-					if (dbwillconvert(coltype, SQLCHAR)) {
-						tmp_data_len = 32 + (2 * (data_len)); /* FIXME: We allocate more than we need here */
-						tmp_data = emalloc(tmp_data_len);
-						data_len = dbconvert(NULL, coltype, data, data_len, SQLCHAR, (LPBYTE) tmp_data, -1);
+		if (pdo_dblib_stmt_stringify_col(stmt, coltype) && dbwillconvert(coltype, SQLCHAR)) {
+			tmp_data_len = 32 + (2 * (data_len)); /* FIXME: We allocate more than we need here */
+			tmp_data = emalloc(tmp_data_len);
+			data_len = dbconvert(NULL, coltype, data, data_len, SQLCHAR, (LPBYTE) tmp_data, -1);
 
-						zv = emalloc(sizeof(zval));
-						ZVAL_STRING(zv, tmp_data);
+			zv = emalloc(sizeof(zval));
+			ZVAL_STRING(zv, tmp_data);
 
-						efree(tmp_data);
-					}
-					break;
-				}
-			}
+			efree(tmp_data);
 		}
 
 		if (!zv) {

ext/pdo_dblib/pdo_dblib.c

@@ -196,6 +196,7 @@ PHP_MINIT_FUNCTION(pdo_dblib)
 	REGISTER_PDO_CLASS_CONST_LONG("DBLIB_ATTR_STRINGIFY_UNIQUEIDENTIFIER", (long) PDO_DBLIB_ATTR_STRINGIFY_UNIQUEIDENTIFIER);
 	REGISTER_PDO_CLASS_CONST_LONG("DBLIB_ATTR_VERSION", (long) PDO_DBLIB_ATTR_VERSION);
 	REGISTER_PDO_CLASS_CONST_LONG("DBLIB_ATTR_SKIP_EMPTY_ROWSETS", (long) PDO_DBLIB_ATTR_SKIP_EMPTY_ROWSETS);
+	REGISTER_PDO_CLASS_CONST_LONG("DBLIB_ATTR_DATETIME_CONVERT", (long) PDO_DBLIB_ATTR_DATETIME_CONVERT);
 
 	if (FAIL == dbinit()) {
 		return FAILURE;

ext/pdo_dblib/php_pdo_dblib_int.h

@@ -119,6 +119,7 @@ typedef struct {
 	unsigned assume_national_character_set_strings:1;
 	unsigned stringify_uniqueidentifier:1;
 	unsigned skip_empty_rowsets:1;
+	unsigned datetime_convert:1;
 } pdo_dblib_db_handle;
 
 typedef struct {
@@ -152,6 +153,7 @@ enum {
 	PDO_DBLIB_ATTR_STRINGIFY_UNIQUEIDENTIFIER,
 	PDO_DBLIB_ATTR_VERSION,
 	PDO_DBLIB_ATTR_SKIP_EMPTY_ROWSETS,
+	PDO_DBLIB_ATTR_DATETIME_CONVERT,
 };
 
 #endif

ext/pdo_dblib/tests/datetime_convert.phpt

@@ -0,0 +1,36 @@
+--TEST--
+PDO_DBLIB: PDO::DBLIB_ATTR_DATETIME_CONVERT
+--SKIPIF--
+<?php
+if (!extension_loaded('pdo_dblib')) die('skip not loaded');
+require __DIR__ . '/config.inc';
+?>
+--FILE--
+<?php
+require __DIR__ . '/config.inc';
+
+$sql = "SELECT convert(datetime, '20171027 10:22:44.135') AS [d]";
+
+var_dump($db->getAttribute(PDO::DBLIB_ATTR_DATETIME_CONVERT));
+
+$stmt = $db->query($sql);
+var_dump($stmt->fetch(PDO::FETCH_ASSOC));
+
+// assume default date format: %b %e %Y %I:%M:%S:%z%p
+$db->setAttribute(PDO::DBLIB_ATTR_DATETIME_CONVERT, 1);
+var_dump($db->getAttribute(PDO::DBLIB_ATTR_DATETIME_CONVERT));
+$stmt = $db->query($sql);
+var_dump($stmt->fetch(PDO::FETCH_ASSOC));
+
+?>
+--EXPECT--
+bool(false)
+array(1) {
+  ["d"]=>
+  string(19) "2017-10-27 10:22:44"
+}
+bool(true)
+array(1) {
+  ["d"]=>
+  string(26) "Oct 27 2017 10:22:44:137AM"
+}