MySQL 8.4.3
Source Code Documentation
sql_cmd_dcl.h
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23
24#ifndef SQL_CMD_DCL_INCLUDED
25#define SQL_CMD_DCL_INCLUDED
26
27#include "sql/sql_cmd.h"
28
29/**
30 A base class for DCL/ACL statements.
31*/
32class Sql_cmd_dcl : public Sql_cmd {
33 public:
34 enum enum_sql_cmd_type sql_cmd_type() const override {
35 /*
36 Somewhat unsurprisingly, anything sub-classed to Sql_cmd_dcl
37 identifies as DCL by default.
38 */
39 return SQL_CMD_DCL;
40 }
41};
42
43/**
44 This is a dummy class for old-style commands whose code is in sql_parse.cc,
45 not in the execute() function. This Sql_cmd sub-class presently exists
46 solely to provide a correct sql_cmd_type() for the command; it does nothing
47 else.
48*/
49class Sql_cmd_dcl_dummy final : public Sql_cmd_dcl {
50 private:
52
53 public:
55 assert(my_sql_command == SQLCOM_END); // ensure value was not set up yet
56 my_sql_command = scc;
57 }
58
60 assert(my_sql_command != SQLCOM_END); // ensure value was set up
61 return my_sql_command;
62 }
63
64 // Error: we should never get here! (see explanation above)
65 bool execute(THD *thd [[maybe_unused]]) override {
66 assert(false);
67 return false;
68 }
69};
70
71#endif // SQL_CMD_DCL_INCLUDED
This is a dummy class for old-style commands whose code is in sql_parse.cc, not in the execute() func...
Definition: sql_cmd_dcl.h:49
enum_sql_command sql_command_code() const override
Return the command code for this statement.
Definition: sql_cmd_dcl.h:59
void set_sql_command_code(enum_sql_command scc)
Definition: sql_cmd_dcl.h:54
bool execute(THD *thd) override
Execute this SQL statement.
Definition: sql_cmd_dcl.h:65
enum_sql_command my_sql_command
Definition: sql_cmd_dcl.h:51
A base class for DCL/ACL statements.
Definition: sql_cmd_dcl.h:32
enum enum_sql_cmd_type sql_cmd_type() const override
Definition: sql_cmd_dcl.h:34
Representation of an SQL command.
Definition: sql_cmd.h:83
For each client connection we create a separate thread with THD serving as a thread/connection descri...
Definition: sql_lexer_thd.h:36
enum_sql_command
Definition: my_sqlcommand.h:46
@ SQLCOM_END
Definition: my_sqlcommand.h:208
Representation of an SQL command.
enum_sql_cmd_type
What type of Sql_cmd we're dealing with (DML, DDL, ...).
Definition: sql_cmd.h:53
@ SQL_CMD_DCL
Definition: sql_cmd.h:57