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MDEV-7112 Split HA_CREATE_INFO

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This commit is contained in:
Alexander Barkov
2014-12-08 10:56:08 +04:00
parent b372720177
commit c6d3f8058d
23 changed files with 491 additions and 219 deletions
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95
sql/handler.h
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@ -376,10 +376,8 @@ enum enum_alter_inplace_result {
#define HA_KEY_BLOB_LENGTH 2
#define HA_LEX_CREATE_TMP_TABLE 1
#define HA_LEX_CREATE_IF_NOT_EXISTS 2
#define HA_LEX_CREATE_TABLE_LIKE 4
#define HA_CREATE_TMP_ALTER 8
#define HA_LEX_CREATE_REPLACE 16
#define HA_MAX_REC_LENGTH 65535
/* Table caching type */
@ -1580,9 +1578,41 @@ enum enum_stats_auto_recalc { HA_STATS_AUTO_RECALC_DEFAULT= 0,
HA_STATS_AUTO_RECALC_ON,
HA_STATS_AUTO_RECALC_OFF };
struct HA_CREATE_INFO
/**
A helper struct for schema DDL statements:
CREATE SCHEMA [IF NOT EXISTS] name [ schema_specification... ]
ALTER SCHEMA name [ schema_specification... ]
It stores the "schema_specification" part of the CREATE/ALTER statements and
is passed to mysql_create_db() and mysql_alter_db().
Currently consists only of the schema default character set and collation.
*/
struct Schema_specification_st
{
CHARSET_INFO *table_charset, *default_table_charset;
CHARSET_INFO *default_table_charset;
void init()
{
bzero(this, sizeof(*this));
}
};
/**
A helper struct for table DDL statements, e.g.:
CREATE [OR REPLACE] [TEMPORARY]
TABLE [IF NOT EXISTS] tbl_name table_contents_source;
Represents a combinations of:
1. The scope, i.e. TEMPORARY or not TEMPORARY
2. The "table_contents_source" part of the table DDL statements,
which can be initialized from either of these:
- table_element_list ... // Explicit definition (column and key list)
- LIKE another_table_name ... // Copy structure from another table
- [AS] SELECT ... // Copy structure from a subquery
*/
struct Table_scope_and_contents_source_st
{
CHARSET_INFO *table_charset;
LEX_CUSTRING tabledef_version;
LEX_STRING connect_string;
const char *password, *tablespace;
@ -1602,7 +1632,6 @@ struct HA_CREATE_INFO
uint stats_sample_pages;
uint null_bits; /* NULL bits at start of record */
uint options; /* OR of HA_CREATE_ options */
uint org_options; /* original options from query */
uint merge_insert_method;
uint extra_size; /* length of extra data segment */
SQL_I_List<TABLE_LIST> merge_list;
@ -1635,7 +1664,11 @@ struct HA_CREATE_INFO
MDL_ticket *mdl_ticket;
bool table_was_deleted;
bool tmp_table() { return options & HA_LEX_CREATE_TMP_TABLE; }
void init()
{
bzero(this, sizeof(*this));
}
bool tmp_table() const { return options & HA_LEX_CREATE_TMP_TABLE; }
void use_default_db_type(THD *thd)
{
db_type= tmp_table() ? ha_default_tmp_handlerton(thd)
@ -1644,6 +1677,54 @@ struct HA_CREATE_INFO
};
/**
This struct is passed to handler table routines, e.g. ha_create().
It does not include the "OR REPLACE" and "IF NOT EXISTS" parts, as these
parts are handled on the SQL level and are not needed on the handler level.
*/
struct HA_CREATE_INFO: public Table_scope_and_contents_source_st,
public Schema_specification_st
{
void init()
{
Table_scope_and_contents_source_st::init();
Schema_specification_st::init();
}
};
/**
This struct is passed to mysql_create_table() and similar creation functions,
as well as to show_create_table().
*/
struct Table_specification_st: public HA_CREATE_INFO,
public DDL_options_st
{
// Deep initialization
void init()
{
HA_CREATE_INFO::init();
DDL_options_st::init();
}
void init(DDL_options_st::Options options)
{
HA_CREATE_INFO::init();
DDL_options_st::init(options);
}
/*
Quick initialization, for parser.
Most of the HA_CREATE_INFO is left uninitialized.
It gets fully initialized in sql_yacc.yy, only when the parser
scans a related keyword (e.g. CREATE, ALTER).
*/
void lex_start()
{
HA_CREATE_INFO::options= 0;
DDL_options_st::init();
}
};
/**
In-place alter handler context.