What causes "Cannot parse constraint value from for column ' '" in apache/cassandra?

Provide a term literal parseable by the column type (quote strings, use valid numeric/date literals).

apache/cassandra · error · ConstraintViolationException

Cannot parse constraint value from <term> for column '<colum

Error message

Cannot parse constraint value from <term> for column '<columnName>'

What it means

Thrown by ScalarColumnConstraint.validate during constraint definition when the constraint's term cannot be parsed into the column's return type via returnType.fromString. The CHECK expression is malformed for the column type, so the schema change is rejected.

Source

Thrown at src/java/org/apache/cassandra/cql3/constraints/ScalarColumnConstraint.java:140

        if (!relationType.isSatisfiedBy(valueType, columnValue, value))
            throw new ConstraintViolationException("Column value does not satisfy value constraint for column '" + columnName + "'. "
                                                   + "It should be " + columnName + " " + relationType + " " + term);
    }

    @Override
    public void validate(ColumnMetadata columnMetadata) throws InvalidConstraintDefinitionException
    {
        returnType = columnMetadata.type;

        validateTypes(columnMetadata);

        try
        {
            value = returnType.fromString(ParseUtils.unquote(term));
        }
        catch (Throwable t)
        {
            throw new ConstraintViolationException("Cannot parse constraint value from " + term + " for column '" + columnName + '\'');
        }
    }

    @Override
    public ConstraintType getConstraintType()
    {
        return ConstraintType.SCALAR;
    }

    @Override
    public String toString()
    {
        return columnName + " " + relationType + " " + term;
    }

    @Override
    public String name()
    {

View on GitHub (pinned to 88fd0f6a0e)

Solutions

Provide a term literal parseable by the column type (quote strings, use valid numeric/date literals).
Use CQL native literals for timestamps (e.g. '2024-01-01 00:00:00+0000') rather than arbitrary formats.
Verify the constraint targets the correct column and matches its type.

Example fix

// before: CHECK age > 'twenty' -- int column cannot parse term
// after
CHECK age > 20

Defensive patterns

Strategy: validation

Validate before calling

// Java: parse the term with the column type before DDL
// for an int column
Integer.parseInt("20"); // ok; parseInt("twenty") throws before you even issue ALTER

Try / catch

catch (ConstraintViolationException | InvalidConstraintDefinitionException e) { log.error("cannot parse constraint term: {}", e.getMessage()); }

Prevention

Match literal style to column type (unquoted numbers, quoted strings/dates).
Use canonical CQL timestamp literals for time columns.
Never copy CHECK clauses across differently-typed columns without rewriting terms.

When it happens

Trigger: CREATE TABLE / ALTER TABLE with a CHECK whose term is not parseable by the column type, e.g. CHECK age = 'abc' on an int column, CHECK ts > 'not-a-date' on timestamp, or unquoted/unconvertible literals.

Common situations: String literals used for numeric or date columns; locale-dependent date strings; forgetting to quote string terms so the parser reads a bare identifier; copying constraints between columns of different types.

Understand the failure class

Background: "Invalid ... format", "must be in format X", "does not look like a ..." — invalid argument format errors across CLI tools and libraries — this error's family across 17 libraries.

Related errors

AI-assisted analysis of apache/cassandra@88fd0f6a0e (2026-09-10). Data as JSON: /api/errors/d017b48aa6aeae9f. Report an issue: GitHub.