pgrx::pg_sys

Constant ExprEvalOp_EEOP_SQLVALUEFUNCTION

Source 
pub const ExprEvalOp_EEOP_SQLVALUEFUNCTION: u32 = 50; // 50u32
👎Deprecated since 0.12.0: you want pg_sys::ExprEvalOp::EEOP_SQLVALUEFUNCTION