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  • Committer: Padraig O'Sullivan
  • Date: 2009-08-12 00:28:56 UTC
  • mto: (1115.3.10 captain)
  • mto: This revision was merged to the branch mainline in revision 1120.
  • Revision ID: osullivan.padraig@gmail.com-20090812002856-9szr64d8dbdfgwz9
Created new header and implementation files for KEY_FIELD related code.
Moved these files to the optimizer sub-directory and into the optimizer
namespace.

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drizzled/sql_select.h
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#include "drizzled/join.h"
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/**
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 * Structure used when finding key fields
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 */
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typedef struct key_field_t 
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{
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  Field *field;
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  Item *val; /**< May be empty if diff constant */
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  uint32_t level;
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  uint32_t optimize; /**< KEY_OPTIMIZE_* */
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  bool eq_func;
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  /**
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    If true, the condition this struct represents will not be satisfied
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    when val IS NULL.
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  */
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  bool null_rejecting;
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  bool *cond_guard; /**< @see KeyUse::cond_guard */
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} KEY_FIELD;
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/*****************************************************************************
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  Make som simple condition optimization:
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  If there is a test 'field = const' change all refs to 'field' to 'const'