cetus/src/sharding-config.h

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/* $%BEGINLICENSE%$
Copyright (c) 2007, 2012, Oracle and/or its affiliates. All rights reserved.
This program is free software; you can redistribute it and/or
modify it under the terms of the GNU General Public License as
published by the Free Software Foundation; version 2 of the
License.
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 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
$%ENDLICENSE%$ */
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#ifndef __SHARDING_CONFIG_H__
#define __SHARDING_CONFIG_H__
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include "glib-ext.h"
#include "cetus-util.h"
#define SHARD_DATA_TYPE_UNSUPPORTED 0
#define SHARD_DATA_TYPE_INT 1
#define SHARD_DATA_TYPE_STR 2
#define SHARD_DATA_TYPE_DATE 3
#define SHARD_DATA_TYPE_DATETIME 4
enum sharding_method_t {
SHARD_METHOD_UNKNOWN = -1,
SHARD_METHOD_RANGE = 0,
SHARD_METHOD_HASH = 1,
SHARD_METHOD_LIST = 2
};
typedef struct sharding_vdb_t sharding_vdb_t;
typedef struct sharding_table_t sharding_table_t;
#define MAX_HASH_VALUE_COUNT 1024
typedef struct sharding_partition_t {
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char *value; /* high range OR hash value */
char *low_value; /* low range OR null */
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int hash_count;
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BitArray hash_set[MAX_HASH_VALUE_COUNT / 32]; /* hash values of this partition */
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GString *group_name;
enum sharding_method_t method;
int key_type;
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} sharding_partition_t;
gboolean sharding_partition_contain_hash(sharding_partition_t *, int);
//gboolean sharding_partition_cover_range(sharding_partition_t *, );
struct sharding_vdb_t {
int id;
enum sharding_method_t method;
int key_type;
int logic_shard_num;
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GPtrArray *partitions; /* GPtrArray<sharding_partition_t *> */
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};
struct sharding_table_t {
GString *schema;
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GString *name;
GString *pkey;
int shard_key_type;
int vdb_id;
struct sharding_vdb_t *vdb_ref;
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};
GPtrArray *shard_conf_get_any_group(GPtrArray *groups, const char *db, const char *table);
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GPtrArray *shard_conf_get_all_groups(GPtrArray *groups);
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/* same fixture will get same group */
GPtrArray *shard_conf_get_fixed_group(GPtrArray *groups, guint32 fixture);
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GPtrArray *shard_conf_get_table_groups(GPtrArray *visited_groups,
const char *db, const char *table);
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gboolean shard_conf_is_shard_table(const char *db, const char *table);
gboolean shard_conf_is_single_table(const char *db, const char *table);
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GPtrArray *shard_conf_get_single_table_distinct_group(GPtrArray *groups, const char *db, const char *table);
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sharding_table_t *shard_conf_get_info(const char *db, const char *table);
/**
* similar with shard_conf_get_table_groups
* @return array of group_item_t *
*/
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GPtrArray *shard_conf_table_partitions(GPtrArray *partitions, const char *db, const char *table);
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/**
* find partition by group name
* special name "all" will get all groups
*/
void shard_conf_find_groups(GPtrArray *groups, const char *match);
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gboolean shard_conf_load(char *, int);
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void shard_conf_destroy(void);
#endif /* __SHARDING_CONFIG_H__ */