impala::NullIndicatorOffset Struct Reference

#include <descriptors.h>

Collaboration diagram for impala::NullIndicatorOffset:

Public Member Functions
	NullIndicatorOffset (int byte_offset, int bit_offset)
std::string	DebugString () const

Public Attributes
int	byte_offset
uint8_t	bit_mask

Detailed Description

Location information for null indicator bit for particular slot. For non-nullable slots, the byte_offset will be 0 and the bit_mask will be 0. This allows us to do the NullIndicatorOffset operations (tuple + byte_offset &/| bit_mask) regardless of whether the slot is nullable or not. This is more efficient than branching to check if the slot is non-nullable.

Definition at line 61 of file descriptors.h.

Constructor & Destructor Documentation

impala::NullIndicatorOffset::NullIndicatorOffset ( int  byte_offset, int  bit_offset  )

inline

Definition at line 65 of file descriptors.h.

Member Function Documentation

string impala::NullIndicatorOffset::DebugString

(

)

const

Definition at line 38 of file descriptors.cc.

Referenced by impala::SlotDescriptor::DebugString(), and impala::operator<<().

Member Data Documentation

uint8_t impala::NullIndicatorOffset::bit_mask

Definition at line 63 of file descriptors.h.

Referenced by impala::SlotDescriptor::CodegenIsNull(), impala::SlotDescriptor::CodegenUpdateNull(), impala::SlotRef::GetCodegendComputeFn(), impala::SlotDescriptor::is_nullable(), impala::Tuple::IsNull(), impala::Tuple::SetNotNull(), and impala::Tuple::SetNull().

int impala::NullIndicatorOffset::byte_offset

Definition at line 62 of file descriptors.h.

Referenced by impala::SlotDescriptor::CodegenIsNull(), impala::SlotDescriptor::CodegenUpdateNull(), impala::SlotRef::GetCodegendComputeFn(), impala::Tuple::IsNull(), impala::Tuple::SetNotNull(), and impala::Tuple::SetNull().

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

• be/src/runtime/descriptors.h
• be/src/runtime/descriptors.cc