(&self, context: &FunctionContext)
| 37 | } |
| 38 | |
| 39 | fn execute(&self, context: &FunctionContext) -> FunctionResult<Value> { |
| 40 | // Handle 1 or 2 arguments |
| 41 | let arg_count = context.arguments.len(); |
| 42 | if arg_count == 0 || arg_count > 2 { |
| 43 | return Err(FunctionError::InvalidArgumentType { |
| 44 | message: "ROUND function expects 1 or 2 arguments".to_string(), |
| 45 | }); |
| 46 | } |
| 47 | |
| 48 | // Get the number argument |
| 49 | let value = context.get_argument(0)?; |
| 50 | |
| 51 | if value.is_null() { |
| 52 | return Ok(Value::Null); |
| 53 | } |
| 54 | |
| 55 | // Convert to number |
| 56 | let number = if let Some(n) = value.as_number() { |
| 57 | n |
| 58 | } else if let Some(s) = value.as_string() { |
| 59 | s.parse::<f64>() |
| 60 | .map_err(|_| FunctionError::InvalidArgumentType { |
| 61 | message: format!("Cannot convert '{}' to number", s), |
| 62 | })? |
| 63 | } else { |
| 64 | return Err(FunctionError::InvalidArgumentType { |
| 65 | message: "ROUND argument must be a number or convertible to number".to_string(), |
| 66 | }); |
| 67 | }; |
| 68 | |
| 69 | // Get decimal places (default to 0) |
| 70 | let decimal_places = if arg_count == 2 { |
| 71 | let places_value = context.get_argument(1)?; |
| 72 | if let Some(n) = places_value.as_number() { |
| 73 | n as i32 |
| 74 | } else { |
| 75 | return Err(FunctionError::InvalidArgumentType { |
| 76 | message: "ROUND decimal places argument must be a number".to_string(), |
| 77 | }); |
| 78 | } |
| 79 | } else { |
| 80 | 0 |
| 81 | }; |
| 82 | |
| 83 | // Handle special case: if number is 0, always return 0 |
| 84 | if number == 0.0 { |
| 85 | return Ok(Value::Number(0.0)); |
| 86 | } |
| 87 | |
| 88 | // Oracle ROUND logic |
| 89 | let rounded = oracle_round(number, decimal_places); |
| 90 | |
| 91 | Ok(Value::Number(rounded)) |
| 92 | } |
| 93 | |
| 94 | fn return_type(&self) -> &str { |
| 95 | "Number" |
nothing calls this directly
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