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Viewing changes to drizzled/sql_lex.h

  • Committer: Brian Aker
  • Date: 2009-03-14 16:51:54 UTC
  • mfrom: (934.2.2 small-cleanups)
  • Revision ID: brian@tangent.org-20090314165154-qwuzmdlz35pyl6hq
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drizzled/sql_lex.h
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/**
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  @defgroup Semantic_Analysis Semantic Analysis
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*/
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#include <drizzled/sql_udf.h>
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#include <drizzled/name_resolution_context.h>
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#include <drizzled/item/subselect.h>
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#include <drizzled/item/param.h>
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#include <drizzled/item/outer_ref.h>
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#include <drizzled/table_list.h>
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#include <drizzled/function/math/real.h>
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#include <drizzled/alter_drop.h>
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#include <drizzled/alter_column.h>
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#include <drizzled/key.h>
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#include <drizzled/foreign_key.h>
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#include <drizzled/item/param.h>
 
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#include "drizzled/sql_udf.h"
 
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#include "drizzled/name_resolution_context.h"
 
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#include "drizzled/item/subselect.h"
 
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#include "drizzled/item/param.h"
 
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#include "drizzled/item/outer_ref.h"
 
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#include "drizzled/table_list.h"
 
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#include "drizzled/function/math/real.h"
 
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#include "drizzled/alter_drop.h"
 
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#include "drizzled/alter_column.h"
 
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#include "drizzled/key.h"
 
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#include "drizzled/foreign_key.h"
 
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#include "drizzled/item/param.h"
 
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#include "drizzled/index_hint.h"
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class select_result_interceptor;
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class virtual_column_info;
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};
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/*
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  String names used to print a statement with index hints.
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  Keep in sync with index_hint_type.
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*/
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extern const char * index_hint_type_name[];
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typedef unsigned char index_clause_map;
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/*
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  Bits in index_clause_map : one for each possible FOR clause in
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  USE/FORCE/IGNORE INDEX index hint specification
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*/
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#define INDEX_HINT_MASK_JOIN  (1)
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#define INDEX_HINT_MASK_GROUP (1 << 1)
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#define INDEX_HINT_MASK_ORDER (1 << 2)
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#define INDEX_HINT_MASK_ALL (INDEX_HINT_MASK_JOIN | INDEX_HINT_MASK_GROUP | \
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                             INDEX_HINT_MASK_ORDER)
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/* Single element of an USE/FORCE/IGNORE INDEX list specified as a SQL hint  */
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class Index_hint : public Sql_alloc
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{
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public:
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  /* The type of the hint : USE/FORCE/IGNORE */
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  enum index_hint_type type;
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  /* Where the hit applies to. A bitmask of INDEX_HINT_MASK_<place> values */
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  index_clause_map clause;
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  /*
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    The index name. Empty (str=NULL) name represents an empty list
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    USE INDEX () clause
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  */
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  LEX_STRING key_name;
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  Index_hint (enum index_hint_type type_arg, index_clause_map clause_arg,
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              char *str, uint32_t length) :
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    type(type_arg), clause(clause_arg)
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  {
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    key_name.str= str;
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    key_name.length= length;
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  }
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  void print(Session *session, String *str);
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};
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/*
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  The state of the lex parsing for selects
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   master and slaves are pointers to select_lex.