Struct DataTable 

pub struct DataTable {
    pub name: String,
    pub columns: Vec<DataColumn>,
    pub rows: Vec<DataRow>,
    pub metadata: HashMap<String, String>,
}

The main DataTable structure

Fields

name: String

columns: Vec<DataColumn>

rows: Vec<DataRow>

metadata: HashMap<String, String>

Implementations

impl DataTable

pub fn new(name: impl Into<String>) -> Self

pub fn dual() -> Self

Create a DUAL table (similar to Oracle’s DUAL) with one row and one column Used for evaluating expressions without a data source

pub fn add_column(&mut self, column: DataColumn) -> &mut Self

pub fn add_row(&mut self, row: DataRow) -> Result<(), String>

pub fn get_column(&self, name: &str) -> Option<&DataColumn>

pub fn get_column_index(&self, name: &str) -> Option<usize>

pub fn column_count(&self) -> usize

pub fn row_count(&self) -> usize

pub fn is_empty(&self) -> bool

pub fn column_names(&self) -> Vec<String>

Get column names as a vector

pub fn infer_column_types(&mut self)

Infer and update column types based on data

pub fn get_value(&self, row: usize, col: usize) -> Option<&DataValue>

Get a value at specific row and column

pub fn get_value_by_name( &self, row: usize, col_name: &str, ) -> Option<&DataValue>

Get a value by row index and column name

pub fn to_string_table(&self) -> Vec<Vec<String>>

Convert to a vector of string vectors (for display/compatibility)

pub fn get_stats(&self) -> DataTableStats

Get table statistics

pub fn debug_dump(&self) -> String

Generate a debug dump string for display

pub fn estimate_memory_size(&self) -> usize

pub fn from_query_response( response: &QueryResponse, table_name: &str, ) -> Result<Self, String>

V46: Create DataTable from QueryResponse This is the key conversion function that bridges old and new systems

pub fn get_row(&self, index: usize) -> Option<&DataRow>

Get a single row by index

pub fn get_row_as_strings(&self, index: usize) -> Option<Vec<String>>

V50: Get a single row as strings

pub fn pretty_print(&self) -> String

Pretty print the DataTable with a nice box drawing

pub fn get_schema_summary(&self) -> String

Get a schema summary of the DataTable

pub fn get_schema_info(&self) -> Vec<(String, String, bool, usize)>

Get detailed schema information as a structured format

pub fn reserve_rows(&mut self, additional: usize)

Reserve capacity for rows to avoid reallocations

pub fn shrink_to_fit(&mut self)

Shrink vectors to fit actual data (removes excess capacity)

pub fn get_memory_usage(&self) -> usize

Get actual memory usage estimate (more accurate than estimate_memory_size)

Trait Implementations

impl Clone for DataTable

fn clone(&self) -> DataTable

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl DataProvider for DataTable

Implementation of DataProvider for DataTable This allows DataTable to be used wherever DataProvider trait is expected

fn get_row(&self, index: usize) -> Option<Vec<String>>

Get a single row by index Returns None if the index is out of bounds

fn get_column_names(&self) -> Vec<String>

Get the column names/headers

fn get_row_count(&self) -> usize

Get the total number of rows

fn get_column_count(&self) -> usize

Get the total number of columns

fn get_visible_rows(&self, start: usize, count: usize) -> Vec<Vec<String>>

Get multiple rows for efficient rendering This is an optimization to avoid multiple get_row calls

fn get_column_widths(&self) -> Vec<usize>

Get the display width for each column Used for rendering column widths in the TUI

fn get_cell_value(&self, row: usize, col: usize) -> Option<String>

Get a single cell value Returns None if row or column index is out of bounds

fn get_display_value(&self, row: usize, col: usize) -> String

Get a display-formatted cell value Returns empty string if indices are out of bounds

fn get_column_type(&self, _column_index: usize) -> DataType

Get the data type of a specific column This should be cached/determined at load time, not computed on each call

fn get_column_types(&self) -> Vec<DataType>

Get data types for all columns Returns a vector where index corresponds to column index

impl Debug for DataTable

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.