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proc
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thread-self
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proc
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usr
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include
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mysql
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item_vers.h
#ifndef ITEM_VERS_INCLUDED #define ITEM_VERS_INCLUDED /* Copyright (c) 2017, MariaDB Corporation. This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; version 2 of the License. This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with this program; if not, write to the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA */ /* System Versioning items */ #ifdef USE_PRAGMA_INTERFACE #pragma interface /* gcc class implementation */ #endif class Item_func_history: public Item_bool_func { public: /* @param a Item_field for row_end system field */ Item_func_history(THD *thd, Item *a): Item_bool_func(thd, a) { DBUG_ASSERT(a->type() == Item::FIELD_ITEM); } bool val_bool() override; bool fix_length_and_dec() override { set_maybe_null(); null_value= 0; decimals= 0; max_length= 1; return FALSE; } LEX_CSTRING func_name_cstring() const override { static LEX_CSTRING name= {STRING_WITH_LEN("is_history") }; return name; } void print(String *str, enum_query_type query_type) override; Item *do_get_copy(THD *thd) const override { return get_item_copy<Item_func_history>(thd, this); } }; class Item_func_trt_ts: public Item_datetimefunc { TR_table::field_id_t trt_field; public: Item_func_trt_ts(THD *thd, Item* a, TR_table::field_id_t _trt_field); LEX_CSTRING func_name_cstring() const override { static LEX_CSTRING begin_name= {STRING_WITH_LEN("trt_begin_ts") }; static LEX_CSTRING commit_name= {STRING_WITH_LEN("trt_commit_ts") }; return (trt_field == TR_table::FLD_BEGIN_TS) ? begin_name : commit_name; } bool get_date(THD *thd, MYSQL_TIME *res, date_mode_t fuzzydate) override; Item *do_get_copy(THD *thd) const override { return get_item_copy<Item_func_trt_ts>(thd, this); } bool fix_length_and_dec() override { fix_attributes_datetime(decimals); return FALSE; } }; class Item_func_trt_id : public Item_longlong_func { TR_table::field_id_t trt_field; bool backwards; longlong get_by_trx_id(ulonglong trx_id); longlong get_by_commit_ts(MYSQL_TIME &commit_ts, bool backwards); public: Item_func_trt_id(THD *thd, Item* a, TR_table::field_id_t _trt_field, bool _backwards= false); Item_func_trt_id(THD *thd, Item* a, Item* b, TR_table::field_id_t _trt_field); LEX_CSTRING func_name_cstring() const override { static LEX_CSTRING trx_name= {STRING_WITH_LEN("trt_trx_id") }; static LEX_CSTRING commit_name= {STRING_WITH_LEN("trt_commit_id") }; static LEX_CSTRING iso_name= {STRING_WITH_LEN("trt_iso_level") }; switch (trt_field) { case TR_table::FLD_TRX_ID: return trx_name; case TR_table::FLD_COMMIT_ID: return commit_name; case TR_table::FLD_ISO_LEVEL: return iso_name; default: DBUG_ASSERT(0); } return NULL_clex_str; } bool fix_length_and_dec() override { bool res= Item_int_func::fix_length_and_dec(); max_length= 20; return res; } longlong val_int() override; Item *do_get_copy(THD *thd) const override { return get_item_copy<Item_func_trt_id>(thd, this); } }; class Item_func_trt_trx_sees : public Item_bool_func { protected: bool accept_eq; public: Item_func_trt_trx_sees(THD *thd, Item* a, Item* b); LEX_CSTRING func_name_cstring() const override { static LEX_CSTRING name= {STRING_WITH_LEN("trt_trx_sees") }; return name; } bool val_bool() override; Item *do_get_copy(THD *thd) const override { return get_item_copy<Item_func_trt_trx_sees>(thd, this); } }; class Item_func_trt_trx_sees_eq : public Item_func_trt_trx_sees { public: Item_func_trt_trx_sees_eq(THD *thd, Item* a, Item* b) : Item_func_trt_trx_sees(thd, a, b) { accept_eq= true; } LEX_CSTRING func_name_cstring() const override { static LEX_CSTRING name= {STRING_WITH_LEN("trt_trx_sees_eq") }; return name; } }; #endif /* ITEM_VERS_INCLUDED */
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