window_lex.h

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*/

#ifndef WINDOW_LEX_INCLUDED
#define WINDOW_LEX_INCLUDED

/**
  Cf. SQL 2003 7.11 \<window frame units\> and class PT_border
*/
enum enum_window_frame_unit { WFU_ROWS, WFU_RANGE, WFU_GROUPS };

/**
  Cf. SQL 2003 7.11 \<window frame extent\> and class PT_border
  The Window::comparators array depends on the order of values in this enum.
*/
enum enum_window_border_type {
  WBT_CURRENT_ROW = 0,
  WBT_VALUE_PRECEDING,
  WBT_VALUE_FOLLOWING,
  WBT_UNBOUNDED_PRECEDING,
  WBT_UNBOUNDED_FOLLOWING,
};

/**
  Cf. SQL 2003 7.11 \<window frame exclusion\> and class PT_exclusion
*/
enum enum_window_frame_exclusion {
  WFX_CURRENT_ROW,
  WFX_GROUP,
  WFX_TIES,
  WFX_NO_OTHERS
};

/**
  Cf. SQL 2011 6.10 null treatment
*/
enum enum_null_treatment { NT_NONE, NT_RESPECT_NULLS, NT_IGNORE_NULLS };

/**
  Cf. SQL 2011 6.10 from first or last
*/
enum enum_from_first_last { NFL_NONE, NFL_FROM_FIRST, NFL_FROM_LAST };

#endif /* WINDOW_LEX_INCLUDED */