How To Fix /SDF/S1020 - Could not construct query tree

/SDF/S1020 - Overview

• Message type: E = Error

• Message class: /SDF/S1 -

• Message number: 020

• Message text: Could not construct query tree

Self-Explanatory Message

Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of messages in the SAP system have a message text, however this is frequently insufficient to comprehend or resolve the problem.

To make things easier, more detailed information is frequently added to describe the issue, how to fix it, and the necessary steps or configuration modifications.

Unfortunately, there isn't any extra information in this error notice.

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/SDF/S1020 - Details

• The SAP error message /SDF/S1020 Could not construct query tree typically occurs in the context of SAP Smart Data Integration (SDI) or Smart Data Access (SDA) when there is an issue with the query being constructed for data retrieval or transformation. This error can arise due to various reasons, including issues with the data source, incorrect query syntax, or problems with the configuration of the data flow.
  Causes:
  
  Invalid Query Syntax: The SQL query or data flow configuration may contain syntax errors or unsupported SQL constructs.
  Data Source Issues: The data source may not be accessible, or there may be issues with the connection parameters.
  Unsupported Features: The query may be using features or functions that are not supported by the underlying data source or the SDI/SDA framework.
  Data Type Mismatches: There may be mismatches in data types between the source and target systems.
  Configuration Errors: Incorrect configuration of the data flow or transformation settings can