Added new kb article ora-01764-error-radeditor-saving-text-oracle (#704)

Co-authored-by: KB Bot <kb-bot@telerik.com>

Author: github-actions[bot]

knowledge-base/ora-01764-error-radeditor-saving-text-oracle.md

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+---
+title: ORA-01764 Error When Saving Text Data with RadEditor in Oracle Database
+description: Troubleshooting the ORA-01764 "String literal too long" error when saving data with RadEditor in an Oracle database using a VARCHAR2 column.
+type: troubleshooting
+page_title: Solving ORA-01764 Error in RadEditor When Saving Text to Oracle Database
+meta_title: Solving ORA-01764 Error in RadEditor When Saving Text to Oracle Database
+slug: ora-01764-error-radeditor-saving-text-oracle
+tags: radeditor, asp.net ajax, ora-01764, clob, varchar2, maxhtmllength, error
+res_type: kb
+ticketid: 1693150
+---
+
+## Environment
+<table>
+<tbody>
+<tr>
+<td> Product </td>
+<td> RadEditor for ASP.NET AJAX </td>
+</tr>
+<tr>
+<td> Version </td>
+<td> all </td>
+</tr>
+</tbody>
+</table>
+
+## Description
+
+I encounter the ORA-01764 "String literal too long" error in Oracle when saving text data using RadEditor. The database column is of type `VARCHAR2`, and the text size, including HTML markup, exceeds the 4000-byte limit allowed for `VARCHAR2` columns in SQL statements. Even though the visible text is smaller, the error occurs due to the inclusion of HTML tags and formatting generated by RadEditor.
+
+## Cause
+
+The ORA-01764 error is caused when the data being inserted or updated exceeds the 4000-byte limit set for `VARCHAR2` columns in Oracle. The limit applies to the total size of the content, including HTML tags and formatting, not just the visible text.
+
+## Solution
+
+### Option 1: Use CLOB for Large Text Content
+
+1. Change the database column type from `VARCHAR2` to `CLOB`.
+2. CLOB columns can store large text content without the 4000-byte restriction.
+3. Modify the SQL statements and data access code to handle CLOB data types.
+
+### Option 2: Restrict Content Size in RadEditor
+
+1. Set the `MaxHtmlLength` property in RadEditor to 4000 or less to prevent exceeding the database limit.
+
+```asp.net
+<telerik:RadEditor ID="RadEditor1" runat="server" MaxHtmlLength="4000" />
+```
+
+2. Note that this limit includes all HTML markup, not just plain text.
+
+### Properties for Limiting Content
+
+- `MaxHtmlLength`: Restricts the total length of the HTML content, including tags.
+- `MaxTextLength`: Restricts the plain text length, excluding HTML tags.
+
+These properties enforce size limitations before the data reaches the database.
+
+## See Also
+
+- [RadEditor MaxHtmlLength Property](https://www.telerik.com/products/aspnet-ajax/documentation/controls/editor/managing-content/max-content-length-)
+- [Oracle Data Types Documentation](https://docs.oracle.com/en/database/oracle/oracle-database/19/sqlrf/Data-Types.html)