DateTruncExpr Class Reference

#include <DateTimeTranslator.h>

Inheritance diagram for DateTruncExpr:

Collaboration diagram for DateTruncExpr:

Public Member Functions
	DateTruncExpr (const std::shared_ptr< Analyzer::Expr > expr, const DatetruncField &field)
	DateTruncExpr (const std::shared_ptr< Analyzer::Expr > expr, const std::string &field)
const std::shared_ptr < Analyzer::Expr >	generate () const

Static Public Member Functions
static std::shared_ptr < Analyzer::Expr >	generate (const std::shared_ptr< Analyzer::Expr >, const std::string &)
static std::shared_ptr < Analyzer::Expr >	generate (const std::shared_ptr< Analyzer::Expr >, const DatetruncField &)

Static Private Member Functions
static DatetruncField	to_datetrunc_field (const std::string &field)

Private Attributes
std::shared_ptr< Analyzer::Expr >	from_expr_
DatetruncField	field_

Additional Inherited Members
Static Protected Member Functions inherited from DateTimeTranslator
static std::shared_ptr < Analyzer::Constant >	getNumericConstant (const int64_t scale)
static int64_t	getExtractFromTimeConstantValue (const int64_t &timeval, const ExtractField &field, const SQLTypeInfo &ti)
static int64_t	getDateTruncConstantValue (const int64_t &timeval, const DatetruncField &field, const SQLTypeInfo &ti)

Detailed Description

Definition at line 105 of file DateTimeTranslator.h.

Constructor & Destructor Documentation

DateTruncExpr::DateTruncExpr ( const std::shared_ptr< Analyzer::Expr >  expr, const DatetruncField &  field  )

inline

Definition at line 107 of file DateTimeTranslator.h.

      : from_expr_(expr), field_(field) {}

DateTruncExpr::DateTruncExpr ( const std::shared_ptr< Analyzer::Expr >  expr, const std::string &  field  )

inline

Definition at line 109 of file DateTimeTranslator.h.

      : from_expr_(expr), field_(to_datetrunc_field(field)) {}

Member Function Documentation

std::shared_ptr< Analyzer::Expr > DateTruncExpr::generate ( const std::shared_ptr< Analyzer::Expr >  from_expr, const std::string &  field_name  )

static

Definition at line 239 of file DateTimeTranslator.cpp.

References field(), generate(), and to_datetrunc_field().

                                 {
  const auto field = to_datetrunc_field(field_name);
  return DateTruncExpr::generate(from_expr, field);
}

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std::shared_ptr< Analyzer::Expr > DateTruncExpr::generate ( const std::shared_ptr< Analyzer::Expr >  from_expr, const DatetruncField &  field  )

static

Definition at line 246 of file DateTimeTranslator.cpp.

References Datum::bigintval, dtHOUR, dtMINUTE, dtSECOND, field(), anonymous_namespace{DateTimeTranslator.cpp}::from_datetrunc_field(), DateTimeTranslator::getDateTruncConstantValue(), kTIME, and kTIMESTAMP.

                                 {
  const auto& expr_ti = from_expr->get_type_info();
  if (!expr_ti.is_time()) {
    throw std::runtime_error(
        "Only TIME, TIMESTAMP and DATE types can be in DATE_TRUNC function.");
  }
  if (from_expr->get_type_info().get_type() == kTIME && field != dtHOUR &&
      field != dtMINUTE && field != dtSECOND) {
    throw std::runtime_error("Cannot DATE_TRUNC " + from_datetrunc_field(field) +
                             " from TIME.");
  }
  SQLTypeInfo ti(kTIMESTAMP, expr_ti.get_dimension(), 0, expr_ti.get_notnull());
  auto constant = std::dynamic_pointer_cast<Analyzer::Constant>(from_expr);
  if (constant) {
    Datum d{0};
    d.bigintval =
        getDateTruncConstantValue(constant->get_constval().bigintval, field, expr_ti);
    constant->set_constval(d);
    constant->set_type_info(ti);
    return constant;
  }
  return makeExpr<Analyzer::DatetruncExpr>(
      ti, from_expr->get_contains_agg(), field, from_expr->decompress());
}

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const std::shared_ptr<Analyzer::Expr> DateTruncExpr::generate ( ) const

inline

Definition at line 117 of file DateTimeTranslator.h.

References generate_loop_ref::generate().

Referenced by generate(), rewrite_to_date_trunc(), and RelAlgTranslator::translateExtract().

                                                     {
    return generate(from_expr_, field_);
  }

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DatetruncField DateTruncExpr::to_datetrunc_field ( const std::string &  field )

staticprivate

Definition at line 197 of file DateTimeTranslator.cpp.

References dtCENTURY, dtDAY, dtDECADE, dtHOUR, dtMICROSECOND, dtMILLENNIUM, dtMILLISECOND, dtMINUTE, dtMONTH, dtNANOSECOND, dtQUARTER, dtQUARTERDAY, dtSECOND, dtWEEK, dtWEEK_SATURDAY, dtWEEK_SUNDAY, and dtYEAR.

Referenced by generate().

                                                                       {
  DatetruncField fieldno;
  if (boost::iequals(field, "year")) {
    fieldno = dtYEAR;
  } else if (boost::iequals(field, "quarter")) {
    fieldno = dtQUARTER;
  } else if (boost::iequals(field, "month")) {
    fieldno = dtMONTH;
  } else if (boost::iequals(field, "quarterday")) {
    fieldno = dtQUARTERDAY;
  } else if (boost::iequals(field, "day")) {
    fieldno = dtDAY;
  } else if (boost::iequals(field, "hour")) {
    fieldno = dtHOUR;
  } else if (boost::iequals(field, "minute")) {
    fieldno = dtMINUTE;
  } else if (boost::iequals(field, "second")) {
    fieldno = dtSECOND;
  } else if (boost::iequals(field, "millennium")) {
    fieldno = dtMILLENNIUM;
  } else if (boost::iequals(field, "century")) {
    fieldno = dtCENTURY;
  } else if (boost::iequals(field, "decade")) {
    fieldno = dtDECADE;
  } else if (boost::iequals(field, "millisecond")) {
    fieldno = dtMILLISECOND;
  } else if (boost::iequals(field, "microsecond")) {
    fieldno = dtMICROSECOND;
  } else if (boost::iequals(field, "nanosecond")) {
    fieldno = dtNANOSECOND;
  } else if (boost::iequals(field, "week")) {
    fieldno = dtWEEK;
  } else if (boost::iequals(field, "week_sunday")) {
    fieldno = dtWEEK_SUNDAY;
  } else if (boost::iequals(field, "week_saturday")) {
    fieldno = dtWEEK_SATURDAY;
  } else {
    throw std::runtime_error("Invalid field in DATE_TRUNC function " + field);
  }
  return fieldno;
}

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Member Data Documentation

DatetruncField DateTruncExpr::field_

private

Definition at line 125 of file DateTimeTranslator.h.

std::shared_ptr<Analyzer::Expr> DateTruncExpr::from_expr_

private

Definition at line 124 of file DateTimeTranslator.h.

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The documentation for this class was generated from the following files:

• /home/jenkins-slave/workspace/core-os-doxygen/QueryEngine/DateTimeTranslator.h
• /home/jenkins-slave/workspace/core-os-doxygen/QueryEngine/DateTimeTranslator.cpp