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/* Copyright (c) 2017, 2025, Oracle and/or its affiliates.
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License, version 2.0,
as published by the Free Software Foundation.
This program is designed to work with certain software (including
but not limited to OpenSSL) that is licensed under separate terms,
as designated in a particular file or component or in included license
documentation. The authors of MySQL hereby grant you an additional
permission to link the program and your derivative works with the
separately licensed software that they have either included with
the program or referenced in the documentation.
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, version 2.0, 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 St, Fifth Floor, Boston, MA 02110-1301 USA */
#include "parse_tree_handler.h"
#include <cstring>
#include "my_alloc.h"
#include "my_inttypes.h" // TODO: replace with cstdint
#include "my_sqlcommand.h"
#include "my_sys.h"
#include "mysqld_error.h"
#include "sql/auth/auth_common.h"
#include "sql/item.h"
#include "sql/parse_tree_helpers.h"
#include "sql/parse_tree_node_base.h"
#include "sql/parse_tree_nodes.h"
#include "sql/sql_class.h"
#include "sql/sql_lex.h"
class Sql_cmd;
Sql_cmd *PT_handler_open::make_cmd(THD *thd) {
LEX *const lex = thd->lex;
if (lex->sphead) {
my_error(ER_SP_BADSTATEMENT, MYF(0), "HANDLER");
return nullptr;
}
if (!lex->current_query_block()->add_table_to_list(thd, m_table,
m_opt_table_alias, 0))
return nullptr;
lex->sql_command = SQLCOM_HA_OPEN;
return &m_cmd;
}
Sql_cmd *PT_handler_close::make_cmd(THD *thd) {
LEX *const lex = thd->lex;
if (lex->sphead) {
my_error(ER_SP_BADSTATEMENT, MYF(0), "HANDLER");
return nullptr;
}
LEX_CSTRING db = {any_db, strlen(any_db)};
auto table =
new (thd->mem_root) Table_ident(thd->get_protocol(), db, m_table, false);
if (table == nullptr ||
!lex->current_query_block()->add_table_to_list(thd, table, nullptr, 0))
return nullptr;
lex->sql_command = SQLCOM_HA_CLOSE;
return &m_cmd;
}
bool PT_handler_read_base::contextualize(Parse_context *pc) {
THD *const thd = pc->thd;
LEX *const lex = thd->lex;
Query_block *const select = lex->current_query_block();
if (lex->sphead) {
my_error(ER_SP_BADSTATEMENT, MYF(0), "HANDLER");
return true;
}
// ban subqueries in WHERE and LIMIT clauses
lex->expr_allows_subquery = false;
Item *one = new (thd->mem_root) Item_int(1);
if (one == nullptr) return true; // OOM
select->select_limit = one;
select->offset_limit = nullptr;
LEX_CSTRING db = {any_db, strlen(any_db)};
auto table =
new (pc->mem_root) Table_ident(thd->get_protocol(), db, m_table, false);
if (table == nullptr ||
!select->add_table_to_list(pc->thd, table, nullptr, 0))
return true;
if (m_opt_where_clause != nullptr &&
m_opt_where_clause->itemize(pc, &m_opt_where_clause))
return true;
select->set_where_cond(m_opt_where_clause);
if (m_opt_limit_clause != nullptr && m_opt_limit_clause->contextualize(pc))
return true;
lex->expr_allows_subquery = true;
/* Stored functions are not supported for HANDLER READ. */
if (lex->uses_stored_routines()) {
my_error(ER_NOT_SUPPORTED_YET, MYF(0),
"stored functions in HANDLER ... READ");
return true;
}
return false;
}
Sql_cmd *PT_handler_table_scan::make_cmd(THD *thd) {
thd->lex->sql_command = SQLCOM_HA_READ;
Parse_context pc(thd, thd->lex->current_query_block());
if (super::contextualize(&pc)) return nullptr;
return new (thd->mem_root)
Sql_cmd_handler_read(m_direction, nullptr, nullptr, HA_READ_KEY_EXACT);
}
Sql_cmd *PT_handler_index_scan::make_cmd(THD *thd) {
thd->lex->sql_command = SQLCOM_HA_READ;
Parse_context pc(thd, thd->lex->current_query_block());
if (super::contextualize(&pc)) return nullptr;
return new (thd->mem_root)
Sql_cmd_handler_read(m_direction, m_index, nullptr, HA_READ_KEY_EXACT);
}
Sql_cmd *PT_handler_index_range_scan::make_cmd(THD *thd) {
thd->lex->sql_command = SQLCOM_HA_READ;
thd->lex->expr_allows_subquery = false;
Parse_context pc(thd, thd->lex->current_query_block());
if (m_keypart_values->contextualize(&pc) || super::contextualize(&pc))
return nullptr;
thd->lex->expr_allows_subquery = true;
return new (thd->mem_root)
Sql_cmd_handler_read(enum_ha_read_modes::RKEY, m_index,
&m_keypart_values->value, m_key_function);
}
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