Module builtins

Builtin module contains GreptimeDB builtin udf/udaf

Modules

• greptime_builtin 🔒
  GrepTime User Define Function module

Macros

• bind_aggr_fn 🔒
  The macro for binding function in datafusion_physical_expr::expressions(most of them are aggregate function)
• bind_call_unary_math_function 🔒
  use to bind to Data Fusion’s UDF function P.S: seems due to proc macro issues, can’t just use #[pyfunction] in here

Functions

• all_to_f64 🔒
  Because most of the datafusion’s UDF only support f32/64, so cast all to f64 to use datafusion’s UDF
• collect_diff_types_string 🔒
• eval_aggr_fn 🔒
  evaluate Aggregate Expr using its backing accumulator
• from_df_err 🔒
• init_greptime_builtins
• scalar_val_try_into_py_obj 🔒
  turn a ScalarValue into a Python Object, currently support
• try_into_columnar_value
  try to turn a Python Object into a PyVector or a scalar that can be use for calculate
• try_into_py_obj 🔒
  cast a columnar value into python object
• type_cast_error 🔒
  “Can’t cast operand of type {name} into {ty}.”