Set custom key-value configuration for the endpoint.

@<key> = <value>

The @ prefix is optional - both @key = value and key = value work identically. Custom parameters with @ prefix are stored without the prefix (e.g., @my_param = value is stored as my_param).

Some parameters support dynamic values using the {param_name} format, where param_name references a function parameter. The value is resolved at runtime from the actual parameter value passed to the endpoint. The matching and substitution rules are shared across annotations — see Parameter Value Substitution.

create function upload_file(_path text, _file text)
returns void
language sql
begin atomic;
  -- function body
end;

comment on function upload_file(text, text) is '
@upload for file_system
@file_system_path = {_path}
@file_system_file = {_file}
';

Equivalent as a SQL file endpoint (sql/upload-file.sql):

/*
HTTP POST
@upload for file_system
@file_system_path = {path}
@file_system_file = {file}
@param $1 path
@param $2 file
*/
select;

When called with {"_path": "/uploads/images", "_file": "photo.jpg"}, the file will be saved to /uploads/images/photo.jpg.

Many annotations support the @key = value syntax. The following sections link to where each parameter group is documented.

These parameters are predefined annotations that also support the key = value syntax:

• BUFFER_ROWS — buffer_rows, buffer
• RAW — raw, raw_mode, raw_results
• SEPARATOR — separator, raw_separator
• NEW_LINE — new_line, raw_new_line
• COLUMN_NAMES — columns, names, column_names
• CONNECTION — connection, connection_name

Upload handlers accept custom parameters to control file processing behavior per-endpoint:

• UPLOAD — Custom Parameters

Per-endpoint control of HTML table and Excel spreadsheet rendering:

• TABLE_FORMAT

SSE annotations that also support the key = value syntax:

• SSE — sse, sse_path, sse_events_path
• SSE_EVENTS_LEVEL — sse_level, sse_events_level
• SSE_EVENTS_SCOPE — sse_scope, sse_events_scope

Per-endpoint control of generated TypeScript client code:

• TSCLIENT

• NpgsqlRest Options configuration - Configure default parameters
• Upload configuration - Configure upload handlers
• Table Format Options - Configure table format rendering
• Code Generation - Configure TypeScript client generation
• Comment Annotations Guide - How annotations work
• Configuration Guide - How configuration works