DateTimePlusRewrite.h File Reference

#include <memory>

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Namespaces
	Analyzer

Functions
std::shared_ptr< Analyzer::Expr >	rewrite_to_date_trunc (const Analyzer::FunctionOper *)

Function Documentation

std::shared_ptr<Analyzer::Expr> rewrite_to_date_trunc

(

const Analyzer::FunctionOper *

)

Definition at line 161 of file DateTimePlusRewrite.cpp.

References CHECK_EQ, dtINVALID, DateTruncExpr::generate(), anonymous_namespace{DateTimePlusRewrite.cpp}::get_dt_field(), Analyzer::FunctionOper::getArg(), Analyzer::FunctionOper::getArity(), Analyzer::FunctionOper::getName(), and anonymous_namespace{DateTimePlusRewrite.cpp}::remove_cast_to_date().

Referenced by RelAlgTranslator::translateDatePlusMinus(), and RelAlgTranslator::translateFunction().

                                         {
  CHECK_EQ("DATETIME_PLUS", dt_plus->getName());
  CHECK_EQ(size_t(2), dt_plus->getArity());
  const auto ts = remove_cast_to_date(dt_plus->getArg(0));
  if (!ts) {
    return nullptr;
  }
  const auto off_arg = dt_plus->getArg(1);
  const auto dt_field = get_dt_field(ts.get(), off_arg);
  if (dt_field == dtINVALID) {
    return nullptr;
  }
  return DateTruncExpr::generate(ts, dt_field);
}

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