Module output 

Output formatting for QueryResult

This module provides writers that adapt QueryResult to various output formats (table, JSON, CSV) with stable, cqlsh-compatible formatting.

Contract

All writers follow the QUERY_RESULT_CONTRACT.md specification:

• Column order determined by metadata.columns
• Null values handled consistently
• Format-specific conventions (e.g., row count footer for tables)

Re-exports

pub use csv::CSVWriter;

pub use csv::StreamingCSVWriter;

pub use json::JSONWriter;

pub use json::StreamingJSONWriter;

pub use parquet::create_streaming_parquet_writer;

pub use parquet::create_streaming_parquet_writer_from_writer;

pub use parquet::ParquetWriter;

pub use table::TableWriter;

Modules

csv

CSV output writer for QueryResult

json

JSON output writer for QueryResult

parquet

CLI adapter for the core Parquet export writer (Epic #682)

table

Table output writer for QueryResult

value_fmt

Value formatting for CLI output writers

Structs

StreamingProgress

Progress information for streaming operations

ValueFormatter

ValueFormatter provides cqlsh-compatible string formatting for CQL values

Enums

OutputError

Error type for output operations

OutputTarget

Target destination for query output

Traits

StreamingWriter

Trait for writers that support streaming/chunked output

Functions

write_to_target

Write output to target (stdout or file) with atomic file writes