Trait UserDefinedLogicalNodeUnparser

pub trait UserDefinedLogicalNodeUnparser {
    // Provided methods
    fn unparse(
        &self,
        _node: &dyn UserDefinedLogicalNode,
        _unparser: &Unparser<'_>,
        _query: &mut Option<&mut QueryBuilder>,
        _select: &mut Option<&mut SelectBuilder>,
        _relation: &mut Option<&mut RelationBuilder>,
    ) -> Result<UnparseWithinStatementResult> { ... }
    fn unparse_to_statement(
        &self,
        _node: &dyn UserDefinedLogicalNode,
        _unparser: &Unparser<'_>,
    ) -> Result<UnparseToStatementResult> { ... }
}

This trait allows users to define custom unparser logic for their custom logical nodes.

Provided Methods

fn unparse( &self, _node: &dyn UserDefinedLogicalNode, _unparser: &Unparser<'_>, _query: &mut Option<&mut QueryBuilder>, _select: &mut Option<&mut SelectBuilder>, _relation: &mut Option<&mut RelationBuilder>, ) -> Result<UnparseWithinStatementResult>

Unparse the custom logical node to SQL within a statement.

This method is called when the custom logical node is part of a statement. e.g. SELECT * FROM custom_logical_node

The return value should be UnparseWithinStatementResult::Modified if the custom logical node was successfully unparsed. Otherwise, return UnparseWithinStatementResult::Unmodified.

fn unparse_to_statement( &self, _node: &dyn UserDefinedLogicalNode, _unparser: &Unparser<'_>, ) -> Result<UnparseToStatementResult>

Unparse the custom logical node to a statement.

This method is called when the custom logical node is a custom statement.

The return value should be UnparseToStatementResult::Modified if the custom logical node was successfully unparsed. Otherwise, return UnparseToStatementResult::Unmodified.

Implementors