Fix table name parsing issue for batch inserts (#2290)

Author: lilgreenbird

src/main/java/com/microsoft/sqlserver/jdbc/SQLServerPreparedStatement.java

@@ -2694,10 +2694,10 @@ private String parseUserSQLForTableNameDW(boolean hasInsertBeenFound, boolean ha
 
         // At this point, the next chunk of string is the table name, without starting with [ or ".
         while (localUserSQL.length() > 0) {
-            // Keep going until the end of the table name is signalled - either a ., whitespace, ; or comment is
+            // Keep going until the end of the table name is signalled - either a ., whitespace, bracket ; or comment is
             // encountered.
-            if (localUserSQL.charAt(0) == '.' || Character.isWhitespace(localUserSQL.charAt(0))
-                    || checkAndRemoveCommentsAndSpace(false)) {
+            if (localUserSQL.charAt(0) == '.' || localUserSQL.charAt(0) == '('
+                    || Character.isWhitespace(localUserSQL.charAt(0)) || checkAndRemoveCommentsAndSpace(false)) {
                 return sb.toString() + parseUserSQLForTableNameDW(true, true, true, false);
             } else if (localUserSQL.charAt(0) == ';') {
                 throw new IllegalArgumentException(SQLServerException.getErrString("R_endOfQueryDetected"));

src/test/java/com/microsoft/sqlserver/jdbc/preparedStatement/BatchExecutionWithBulkCopyTest.java

@@ -801,6 +801,44 @@ public void testComputedCols() throws Exception {
         }
     }
 
+    /**
+     * Test bulk insert with no space after table name
+     * 
+     * @throws Exception
+     */
+    @Test
+    public void testNoSpaceInsert() throws Exception {
+        // table name with valid alphanumeric chars that don't need to be escaped, since escaping the table name would not test the space issue
+        String testNoSpaceInsertTableName = "testNoSpaceInsertTable" + RandomData.generateInt(false);
+        String valid = "insert into " + testNoSpaceInsertTableName + "(id, json)" + " values(?, ?)";
+
+        try (Connection connection = PrepUtil.getConnection(connectionString + ";useBulkCopyForBatchInsert=true;");
+                SQLServerPreparedStatement pstmt = (SQLServerPreparedStatement) connection.prepareStatement(valid);
+                Statement stmt = (SQLServerStatement) connection.createStatement();) {
+            Field f1 = SQLServerConnection.class.getDeclaredField("isAzureDW");
+            f1.setAccessible(true);
+            f1.set(connection, true);
+
+            TestUtils.dropTableIfExists(AbstractSQLGenerator.escapeIdentifier(tableNameBulkComputedCols), stmt);
+            String createTable = "create table " + testNoSpaceInsertTableName
+                    + " (id nvarchar(100) not null, json nvarchar(max) not null,"
+                    + " vcol1 as json_value([json], '$.vcol1'), vcol2 as json_value([json], '$.vcol2'))";
+            stmt.execute(createTable);
+
+            String jsonValue = "{\"vcol1\":\"" + UUID.randomUUID().toString() + "\",\"vcol2\":\""
+                    + UUID.randomUUID().toString() + "\" }";
+            String idValue = UUID.randomUUID().toString();
+            pstmt.setString(1, idValue);
+            pstmt.setString(2, jsonValue);
+            pstmt.addBatch();
+            pstmt.executeBatch();
+        } finally {
+            try (Statement stmt = connection.createStatement()) {
+                TestUtils.dropTableIfExists(AbstractSQLGenerator.escapeIdentifier(testNoSpaceInsertTableName), stmt);
+            }
+        }
+    }
+
     @BeforeAll
     public static void setupTests() throws Exception {
         setConnection();