Adding upstream version 1:10.5.12.upstream/1%10.5.12upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 125 insertions, 0 deletions

diff --git a/storage/cassandra/cassandra_se.h b/storage/cassandra/cassandra_se.h
new file mode 100644
index 00000000..d1286ae2
--- /dev/null
+++ b/storage/cassandra/cassandra_se.h
@@ -0,0 +1,125 @@
+
+/*
+  This file is a "bridge" interface between cassandra+Thrift and MariaDB.
+
+  It is #included by both sides, so it must itself include neither (including
+  both together causes compile errors due to conflicts).
+*/
+
+struct st_mysql_lex_string;
+typedef struct st_mysql_lex_string LEX_STRING;
+
+/* We need to define this here so that ha_cassandra.cc also has access to it */
+typedef enum
+{
+  ONE = 1-1,
+  QUORUM = 2-1,
+  LOCAL_QUORUM = 3-1,
+  EACH_QUORUM = 4-1,
+  ALL = 5-1,
+  ANY = 6-1,
+  TWO = 7-1,
+  THREE = 8-1,
+} enum_cassandra_consistency_level;
+
+
+class Column_name_enumerator
+{
+public:
+  virtual const char* get_next_name()=0;
+  virtual ~Column_name_enumerator(){}
+};
+
+/*
+  Interface to one cassandra column family, i.e. one 'table'
+*/
+class Cassandra_se_interface
+{
+public:
+  Cassandra_se_interface() { err_buffer[0]=0; }
+
+  virtual ~Cassandra_se_interface(){};
+  /* Init */
+  virtual bool connect(const char *host, int port, const char *keyspace)=0;
+  virtual void set_column_family(const char *cfname) = 0;
+
+  /* Settings */
+  virtual void set_consistency_levels(unsigned long read_cons_level, unsigned long write_cons_level)=0;
+  virtual void set_n_retries(uint retries_arg)=0;
+
+  /* Check underlying DDL */
+  virtual bool setup_ddl_checks()=0;
+  virtual void first_ddl_column()=0;
+  virtual bool next_ddl_column(char **name, int *name_len, char **value,
+                               int *value_len)=0;
+  virtual void get_rowkey_type(char **name, char **type)=0;
+  virtual size_t get_ddl_size()=0;
+  virtual const char* get_default_validator()=0;
+
+  /* Writes */
+  virtual void clear_insert_buffer()=0;
+  virtual void add_row_deletion(const char *key, int key_len,
+                                Column_name_enumerator *col_names,
+                                LEX_STRING *names, uint nnames)=0;
+  virtual void start_row_insert(const char *key, int key_len)=0;
+  virtual void add_insert_delete_column(const char *name, int name_len)= 0;
+  virtual void add_insert_column(const char *name, int name_len,
+                                 const char *value,
+                                 int value_len)=0;
+  virtual bool do_insert()=0;
+
+  /* Reads */
+  virtual bool get_slice(char *key, size_t key_len, bool *found)=0 ;
+  virtual bool get_next_read_column(char **name, int *name_len,
+                                    char **value, int *value_len)=0;
+  virtual void get_read_rowkey(char **value, int *value_len)=0;
+
+  /* Reads, multi-row scans */
+  int read_batch_size;
+  virtual bool get_range_slices(bool last_key_as_start_key)=0;
+  virtual void finish_reading_range_slices()=0;
+  virtual bool get_next_range_slice_row(bool *eof)=0;
+
+  /* Reads, MRR scans */
+  virtual void new_lookup_keys()=0;
+  virtual int  add_lookup_key(const char *key, size_t key_len)=0;
+  virtual bool multiget_slice()=0;
+  virtual bool get_next_multiget_row()=0;
+
+  /* read_set setup */
+  virtual void clear_read_columns()=0;
+  virtual void clear_read_all_columns()=0;
+  virtual void add_read_column(const char *name)=0;
+
+  virtual bool truncate()=0;
+  virtual bool remove_row()=0;
+
+  /* Passing error messages up to ha_cassandra */
+  char err_buffer[512];
+  const char *error_str() { return err_buffer; }
+  void print_error(const char *format, ...);
+};
+
+
+/* A structure with global counters */
+class Cassandra_status_vars
+{
+public:
+  unsigned long row_inserts;
+  unsigned long row_insert_batches;
+
+  unsigned long multiget_reads;
+  unsigned long multiget_keys_scanned;
+  unsigned long multiget_rows_read;
+
+  unsigned long timeout_exceptions;
+  unsigned long unavailable_exceptions;
+  unsigned long network_exceptions;
+};
+
+
+extern Cassandra_status_vars cassandra_counters;
+
+
+Cassandra_se_interface *create_cassandra_se();
+