How Do I Fix the DLI.0005 Error When Using EL Expressions to Create a Table in a Flink SQL Job?

Symptom

DLI.0005: AnalysisException: t_user_message_input_#{date_format(date_sub(current_date(), 1), 'yyyymmddhhmmss')} is not a valid name for tables/databases. Valid names only contain alphabet characters, numbers and _.

Solution

Replace the number sign (#) in the table name to the dollar sign ($). The format of the EL expression used in DLI should be ${expr}.

Before modification:

t_user_message_input_#{date_format(date_sub(current_date(), 1), 'yyyymmddhhmmss')}

After modification:

t_user_message_input_${date_format(date_sub(current_date(), 1), 'yyyymmddhhmmss')}

After the modification, the Flink SQL job can correctly parse table names and dynamically generate table names based on EL expressions.