SqlExpression

Root class of SQL expressions or statements.

SQL expressions are tree structures, and can be regarded as SQL abstract syntax trees (AST).

Subclasses must satisfy the following rules:

• Must be data class, providing common abilities such as destruction, copy function, equals function, etc.

• Must be immutable, any modify operation should return a new expression instance.

To visit or modify expression trees, use SqlExpressionVisitor.

To format expressions as executable SQL strings, use SqlFormatter.

See also

Inheritors