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#include <drizzled/visibility.h>
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class Name_resolution_context;
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void table_cache_free(void);
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bool table_cache_init(void);
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uint32_t cached_open_tables(void);
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uint32_t cached_table_definitions(void);
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void table_cache_free();
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table::Cache &get_open_cache();
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DRIZZLED_API void kill_drizzle(void);
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DRIZZLED_API void kill_drizzle();
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void set_item_name(Item *item,char *pos,uint32_t length);
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bool add_field_to_list(Session *session, LEX_STRING *field_name, enum enum_field_types type,
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char *length, char *decimal,
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bool add_field_to_list(Session *session, str_ref field_name, enum enum_field_types type,
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const char *length, const char *decimal,
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uint32_t type_modifier,
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enum column_format_type column_format,
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Item *default_value, Item *on_update_value,
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char *change, List<String> *interval_list,
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const CHARSET_INFO * const cs);
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CreateField * new_create_field(Session *session, char *field_name, enum_field_types type,
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char *length, char *decimals,
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const char *change, List<String> *interval_list,
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const charset_info_st * const cs);
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CreateField * new_create_field(Session *session, const char *field_name, enum_field_types type,
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const char *length, const char *decimals,
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uint32_t type_modifier,
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Item *default_value, Item *on_update_value,
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LEX_STRING *comment, char *change,
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List<String> *interval_list, CHARSET_INFO *cs);
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bool push_new_name_resolution_context(Session *session,
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str_ref comment, const char *change,
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List<String> *interval_list, charset_info_st *cs);
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void push_new_name_resolution_context(Session&, TableList& left_op, TableList& right_op);
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void add_join_on(TableList *b,Item *expr);
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void add_join_natural(TableList *a,TableList *b,List<String> *using_fields,
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TableList *unique_table(TableList *table, TableList *table_list,
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bool check_alias= false);
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/* bits for last argument to table::Cache::singleton().removeTable() */
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/* bits for last argument to table::Cache::removeTable() */
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#define RTFC_NO_FLAG 0x0000
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#define RTFC_OWNED_BY_Session_FLAG 0x0001
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#define RTFC_WAIT_OTHER_THREAD_FLAG 0x0002