MySQL 8.4.3
Source Code Documentation
sql_cmd_ddl.h
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23
24#ifndef SQL_CMD_DDL_INCLUDED
25#define SQL_CMD_DDL_INCLUDED
26
27#include "sql/sql_cmd.h"
28
29class Sql_cmd_ddl : public Sql_cmd {
30 public:
31 enum enum_sql_cmd_type sql_cmd_type() const override {
32 /*
33 Somewhat unsurprisingly, anything sub-classed to Sql_cmd_ddl
34 identifies as DDL by default.
35 */
36 return SQL_CMD_DDL;
37 }
38};
39
40/**
41 This is a dummy class for old-style commands whose code is in sql_parse.cc,
42 not in the execute() function. This Sql_cmd sub-class presently exists
43 solely to provide a correct sql_cmd_type() for the command; it does nothing
44 else.
45*/
46class Sql_cmd_ddl_dummy final : public Sql_cmd_ddl {
47 private:
49
50 public:
52 assert(my_sql_command == SQLCOM_END); // ensure value was not set up yet
53 my_sql_command = scc;
54 }
55
57 assert(my_sql_command != SQLCOM_END); // ensure value was set up
58 return my_sql_command;
59 }
60
61 // Error: we should never get here! (see explanation above)
62 bool execute(THD *thd [[maybe_unused]]) override {
63 assert(false);
64 return false;
65 }
66};
67
68#endif // SQL_CMD_DDL_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_ddl.h:46
bool execute(THD *thd) override
Execute this SQL statement.
Definition: sql_cmd_ddl.h:62
enum_sql_command sql_command_code() const override
Return the command code for this statement.
Definition: sql_cmd_ddl.h:56
enum_sql_command my_sql_command
Definition: sql_cmd_ddl.h:48
void set_sql_command_code(enum_sql_command scc)
Definition: sql_cmd_ddl.h:51
Definition: sql_cmd_ddl.h:29
enum enum_sql_cmd_type sql_cmd_type() const override
Definition: sql_cmd_ddl.h:31
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_DDL
Definition: sql_cmd.h:55