pub fn expand_nested_column(
column_name: &str,
schema: &Value,
nullable: bool,
columns: &mut Vec<Column>,
errors: &mut Vec<ParserError>,
)Expand description
Expand a nested column from a schema definition, creating columns with dot notation.
This helper function recursively expands nested structures (OBJECT/STRUCT types) into flat columns with dot notation (e.g., “address.street”, “address.city”).