DB2 SQL Syntax Error 104 | Generated by AI
IBM DB2 Error Code -104 (SQLSTATE 42601)
This error indicates a syntax error in an SQL statement parsed by DB2. Specifically, it occurs when the SQL parser encounters an unexpected token (e.g., a keyword, symbol, or identifier) that doesn’t fit the expected grammar rules at that point in the statement.
Common Details:
- SQLCODE: -104
- SQLSTATE: 42601 (a Class 42 error, which pertains to syntax or access rule violations)
- Uninformative indicator: This means the error message isn’t complete; DB2 will provide more context, such as the unexpected token and what was expected instead.
Typical Message Format:
“An unexpected token ‘X’ was found following ‘Y’. Expected tokens may include: ‘Z’. SQLCODE=-104, SQLSTATE=42601”
For example:
- If you accidentally use a reserved word incorrectly, like “SELECT * FROM table WHERE id = ;” (missing value after =), you might get something like: “An unexpected token ‘;’ was found following ‘id = ‘.”
- Another case: Typo in keywords, e.g., “SELCT * FROM table;” where “SELCT” is invalid.
Causes:
- Typographical errors (e.g., misspelled keywords like “SELCT” instead of “SELECT”).
- Missing or misplaced punctuation (commas, parentheses, semicolons).
- Incorrect use of identifiers, operators, or clauses (e.g., putting a WHERE clause before FROM).
- Unsupported syntax for the specific DB2 version or dialect (e.g., trying to use non-standard SQL extensions).
How to Resolve:
- Review the SQL statement: Double-check for typos, especially in keywords, table names, and operators. Compare against DB2 documentation for proper syntax.
- Use tools: Run the statement through a DB2 command line interface (e.g., DB2 CLP) or a SQL editor with syntax highlighting to spot issues early.
- Common fixes:
- Ensure keywords are spelled correctly and used in the right order (e.g., SELECT, FROM, WHERE).
- Check for balanced parentheses and quotes.
- If using dynamic SQL, validate the generated string.
- Test incrementally: Break complex queries into smaller parts to isolate the error.
If you’re encountering this in a specific context (e.g., a stored procedure or application code), sharing the exact SQL and full error message can help diagnose further. For official details, refer to the IBM DB2 Knowledge Center or SQL reference manuals.