mirror of
https://github.com/MariaDB/server.git
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8eb16159e1
- We use HA_MRR_NO_ASSOC ("optimizer_switch=join_cache_hashed") mode
- Not able to use BKA's buffers yet.
- There is a variable to control batch size
- There are status counters.
- Nedeed to make some fixes in BKA code (to be checked with Igor)
84 lines
2.4 KiB
C++
84 lines
2.4 KiB
C++
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/*
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This file is a "bridge" interface between cassandra+Thrift and MariaDB.
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It is #included by both sides, so it must itself include neither (including
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both together causes compile errors due to conflicts).
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*/
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/*
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Interface to one cassandra column family, i.e. one 'table'
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*/
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class Cassandra_se_interface
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{
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public:
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Cassandra_se_interface() { err_buffer[0]=0; }
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virtual ~Cassandra_se_interface(){};
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/* Init */
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virtual bool connect(const char *host, const char *port)=0;
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virtual void set_column_family(const char *cfname) = 0;
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/* Check underlying DDL */
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virtual bool setup_ddl_checks()=0;
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virtual void first_ddl_column()=0;
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virtual bool next_ddl_column(char **name, int *name_len, char **value,
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int *value_len)=0;
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virtual void get_rowkey_type(char **name, char **type)=0;
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/* Writes */
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virtual void clear_insert_buffer()=0;
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virtual void start_row_insert(const char *key, int key_len)=0;
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virtual void add_insert_column(const char *name, const char *value,
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int value_len)=0;
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virtual bool do_insert()=0;
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/* Reads */
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virtual bool get_slice(char *key, size_t key_len, bool *found)=0 ;
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virtual bool get_next_read_column(char **name, char **value, int *value_len)=0;
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virtual void get_read_rowkey(char **value, int *value_len)=0;
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/* Reads, multi-row scans */
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int read_batch_size;
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virtual bool get_range_slices(bool last_key_as_start_key)=0;
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virtual void finish_reading_range_slices()=0;
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virtual bool get_next_range_slice_row(bool *eof)=0;
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/* Reads, MRR scans */
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virtual void new_lookup_keys()=0;
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virtual int add_lookup_key(const char *key, size_t key_len)=0;
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virtual bool multiget_slice()=0;
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virtual bool get_next_multiget_row()=0;
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/* read_set setup */
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virtual void clear_read_columns()=0;
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virtual void add_read_column(const char *name)=0;
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virtual bool truncate()=0;
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virtual bool remove_row()=0;
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/* Passing error messages up to ha_cassandra */
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char err_buffer[512];
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const char *error_str() { return err_buffer; }
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void print_error(const char *format, ...);
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};
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/* A structure with global counters */
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class Cassandra_status_vars
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{
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public:
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ulong row_inserts;
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ulong row_insert_batches;
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ulong multiget_reads;
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ulong multiget_keys_scanned;
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ulong multiget_rows_read;
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};
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extern Cassandra_status_vars cassandra_counters;
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Cassandra_se_interface *get_cassandra_se();
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