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drizzled/optimizer/explain_plan.h
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namespace optimizer
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{
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/** select type for EXPLAIN */
 
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enum select_type
 
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{ 
 
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  ST_PRIMARY,
 
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  ST_SIMPLE,
 
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  ST_DERIVED,
 
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  ST_DEPENDENT_SUBQUERY,
 
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  ST_UNCACHEABLE_SUBQUERY,
 
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  ST_SUBQUERY,
 
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        ST_DEPENDENT_UNION,
 
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  ST_UNCACHEABLE_UNION,
 
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  ST_UNION,
 
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  ST_UNION_RESULT
 
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};
 
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class ExplainPlan
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{
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public: