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ddcc9d2281
Adding virtual methods to class Schema: make_item_func_replace() make_item_func_substr() make_item_func_trim() This is a non-functional preparatory change for MDEV-27744.
141 lines
4.2 KiB
C++
141 lines
4.2 KiB
C++
/*
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Copyright (c) 2020, MariaDB Corporation.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; version 2 of the License.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1335 USA */
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#include "mariadb.h"
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#include "sql_type.h"
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#include "sql_schema.h"
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#include "sql_class.h"
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class Schema_oracle: public Schema
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{
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public:
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Schema_oracle(const LEX_CSTRING &name)
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:Schema(name)
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{ }
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const Type_handler *map_data_type(THD *thd, const Type_handler *src)
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const
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{
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if (src == &type_handler_newdate)
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return thd->type_handler_for_datetime();
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return src;
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}
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Item *make_item_func_replace(THD *thd,
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Item *subj,
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Item *find,
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Item *replace) const;
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Item *make_item_func_substr(THD *thd,
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const Lex_substring_spec_st &spec) const;
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Item *make_item_func_trim(THD *thd, const Lex_trim_st &spec) const;
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};
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class Schema_maxdb: public Schema
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{
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public:
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Schema_maxdb(const LEX_CSTRING &name)
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:Schema(name)
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{ }
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const Type_handler *map_data_type(THD *thd, const Type_handler *src)
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const
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{
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if (src == &type_handler_timestamp ||
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src == &type_handler_timestamp2)
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return thd->type_handler_for_datetime();
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return src;
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}
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};
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Schema mariadb_schema(Lex_cstring(STRING_WITH_LEN("mariadb_schema")));
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Schema_oracle oracle_schema(Lex_cstring(STRING_WITH_LEN("oracle_schema")));
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Schema_maxdb maxdb_schema(Lex_cstring(STRING_WITH_LEN("maxdb_schema")));
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Schema *Schema::find_by_name(const LEX_CSTRING &name)
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{
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DBUG_ASSERT(name.str);
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if (mariadb_schema.eq_name(name))
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return &mariadb_schema;
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if (oracle_schema.eq_name(name))
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return &oracle_schema;
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if (maxdb_schema.eq_name(name))
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return &maxdb_schema;
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return NULL;
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}
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Schema *Schema::find_implied(THD *thd)
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{
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if (thd->variables.sql_mode & MODE_ORACLE)
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return &oracle_schema;
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if (thd->variables.sql_mode & MODE_MAXDB)
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return &maxdb_schema;
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return &mariadb_schema;
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}
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Item *Schema::make_item_func_replace(THD *thd,
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Item *subj,
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Item *find,
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Item *replace) const
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{
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return new (thd->mem_root) Item_func_replace(thd, subj, find, replace);
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}
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Item *Schema::make_item_func_substr(THD *thd,
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const Lex_substring_spec_st &spec) const
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{
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return spec.m_for ?
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new (thd->mem_root) Item_func_substr(thd, spec.m_subject, spec.m_from,
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spec.m_for) :
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new (thd->mem_root) Item_func_substr(thd, spec.m_subject, spec.m_from);
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}
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Item *Schema::make_item_func_trim(THD *thd, const Lex_trim_st &spec) const
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{
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return spec.make_item_func_trim_std(thd);
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}
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Item *Schema_oracle::make_item_func_replace(THD *thd,
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Item *subj,
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Item *find,
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Item *replace) const
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{
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return new (thd->mem_root) Item_func_replace_oracle(thd, subj, find, replace);
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}
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Item *Schema_oracle::make_item_func_substr(THD *thd,
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const Lex_substring_spec_st &spec) const
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{
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return spec.m_for ?
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new (thd->mem_root) Item_func_substr_oracle(thd, spec.m_subject,
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spec.m_from,
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spec.m_for) :
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new (thd->mem_root) Item_func_substr_oracle(thd, spec.m_subject,
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spec.m_from);
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}
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Item *Schema_oracle::make_item_func_trim(THD *thd,
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const Lex_trim_st &spec) const
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{
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return spec.make_item_func_trim_oracle(thd);
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}
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