Struct MaterializeParams 

pub struct MaterializeParams {
    pub table: Option<String>,
    pub selector: RowSelector,
    pub fields: FieldSelector,
    pub format: MaterializeFormat,
    pub dest: String,
    pub concat: Option<bool>,
    pub write_mode: Option<WriteMode>,
    pub dry_run: Option<bool>,
}

Parameters for the row_materialize MCP tool.

Required fields

• selector — identifies which rows to materialise.
• fields — field projection.
• format — output serialisation format.
• dest — absolute filesystem path. Relative paths are rejected at validation time (Crux #1: Agent-First trust model).

Fields

table: Option<String>

Target table name. Optional in legacy single-table mode.

selector: RowSelector

Row selector (by id or by filter).

fields: FieldSelector

Field projection (all fields or a named subset).

format: MaterializeFormat

Output format.

dest: String

Absolute destination path. When concat=false (default) this is treated as a directory; when concat=true it is the output file path.

concat: Option<bool>

When false (default) each row is written to {dest}/{row.id}.{ext}. When true all rows are concatenated into a single file at {dest}.

write_mode: Option<WriteMode>

Behaviour when the target file already exists. Defaults to Overwrite.

dry_run: Option<bool>

When true, validation, projection, serialisation, and SHA-256 computation are performed but no file is written. The returned MaterializeFile entries carry would-be path, bytes, and sha256 values (Crux #3 — digest is always present).

Trait Implementations

impl Debug for MaterializeParams

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

Formats the value using the given formatter.

impl<'de> Deserialize<'de> for MaterializeParams

fn deserialize<__D>(__deserializer: __D) -> Result<Self, __D::Error>

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl JsonSchema for MaterializeParams

fn schema_name() -> Cow<'static, str>

The name of the generated JSON Schema.

fn schema_id() -> Cow<'static, str>

Returns a string that uniquely identifies the schema produced by this type.

fn json_schema(generator: &mut SchemaGenerator) -> Schema

Generates a JSON Schema for this type.

fn inline_schema() -> bool

Whether JSON Schemas generated for this type should be included directly in parent schemas, rather than being re-used where possible using the $ref keyword.