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query planner stuff

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some gcc -Wall fixes
added suport for _ in identifier names in SQL
gmdb2 manual additions
This commit is contained in:
brianb
2003-01-20 16:04:24 +00:00
parent bafa51bd88
commit 092e2b79af
34 changed files with 1143 additions and 382 deletions
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4
include/mdbsql.h
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@@ -16,6 +16,8 @@ typedef struct {
int num_sargs;
GPtrArray *sargs;
MdbTableDef *cur_table;
MdbSargNode *sarg_tree;
GList *sarg_stack;
/* FIX ME */
char *bound_values[256];
} MdbSQL;
@@ -50,7 +52,7 @@ MdbSQLColumn *mdb_sql_alloc_column();
MdbSQLTable *mdb_sql_alloc_table();
MdbHandle *mdb_sql_open(MdbSQL *sql, char *db_name);
int mdb_sql_add_sarg(MdbSQL *sql, char *col_name, int op, char *constant);
int mdb_sql_all_columns(MdbSQL *sql);
void mdb_sql_all_columns(MdbSQL *sql);
int mdb_sql_add_column(MdbSQL *sql, char *column_name);
int mdb_sql_add_table(MdbSQL *sql, char *table_name);
void mdb_sql_dump(MdbSQL *sql);

199
include/mdbtools.h
View File

@@ -85,7 +85,10 @@ enum {
/* SARG operators */
enum {
MDB_EQUAL = 1,
MDB_OR = 1,
MDB_AND,
MDB_NOT,
MDB_EQUAL,
MDB_GT,
MDB_LT,
MDB_GTEQ,
@@ -95,6 +98,25 @@ enum {
MDB_NOTNULL
};
typedef enum {
MDB_TABLE_SCAN,
MDB_LEAF_SCAN,
MDB_INDEX_SCAN
} MdbStrategy;
#define mdb_is_logical_op(x) (x == MDB_OR || \
x == MDB_AND || \
x == MDB_NOT )
#define mdb_is_relational_op(x) (x == MDB_EQUAL || \
x == MDB_GT || \
x == MDB_LT || \
x == MDB_GTEQ || \
x == MDB_LTEQ || \
x == MDB_LIKE || \
x == MDB_ISNULL || \
x == MDB_NOTNULL )
enum {
MDB_ASC,
MDB_DESC
@@ -112,6 +134,9 @@ enum {
/* hash to store registered backends */
GHashTable *mdb_backends;
/* forward declarations */
typedef struct mdbindex MdbIndex;
typedef struct {
char **types_table;
} MdbBackend;
@@ -158,7 +183,7 @@ typedef struct {
typedef struct {
MdbFile *f;
guint16 cur_pg;
guint32 cur_pg;
guint16 row_num;
unsigned int cur_pos;
unsigned char pg_buf[MDB_PGSIZE];
@@ -183,63 +208,11 @@ typedef struct {
GArray *columns;
} MdbCatalogEntry;
typedef struct {
MdbCatalogEntry *entry;
char name[MDB_MAX_OBJ_NAME+1];
int num_cols;
GPtrArray *columns;
int num_rows;
int index_start;
int num_real_idxs;
int num_idxs;
GPtrArray *indices;
int first_data_pg;
int cur_pg_num;
int cur_phys_pg;
int cur_row;
int noskip_del; /* don't skip deleted rows */
/* object allocation map */
int map_base_pg;
int map_sz;
unsigned char *usage_map;
/* */
int idxmap_base_pg;
int idxmap_sz;
unsigned char *idx_usage_map;
} MdbTableDef;
typedef struct {
int index_num;
char name[MDB_MAX_OBJ_NAME+1];
unsigned char index_type;
int first_pg;
int num_rows; /* number rows in index */
int num_keys;
short key_col_num[MDB_MAX_IDX_COLS];
unsigned char key_col_order[MDB_MAX_IDX_COLS];
unsigned char flags;
MdbTableDef *table;
} MdbIndex;
typedef struct {
guint32 pg;
int mask_pos;
unsigned char mask_byte;
int mask_bit;
int offset;
int len;
} MdbIndexPage;
#define MDB_MAX_INDEX_DEPTH 10
typedef struct {
int cur_depth;
MdbIndexPage pages[MDB_MAX_INDEX_DEPTH];
} MdbIndexChain;
typedef struct {
char name[MDB_MAX_OBJ_NAME+1];
} MdbColumnProp;
typedef union {
int i;
double d;
char s[256];
} MdbAny;
typedef struct {
char name[MDB_MAX_OBJ_NAME+1];
@@ -261,6 +234,81 @@ typedef struct {
int col_scale;
} MdbColumn;
typedef struct _mdbsargtree {
int op;
MdbColumn *col;
MdbAny value;
void *parent;
struct _mdbsargtree *left;
struct _mdbsargtree *right;
} MdbSargNode;
typedef struct {
guint32 pg;
int mask_pos;
unsigned char mask_byte;
int mask_bit;
int offset;
int len;
} MdbIndexPage;
typedef int MdbSargTreeFunc(MdbSargNode *, gpointer);
#define MDB_MAX_INDEX_DEPTH 10
typedef struct {
int cur_depth;
MdbIndexPage pages[MDB_MAX_INDEX_DEPTH];
} MdbIndexChain;
typedef struct {
MdbCatalogEntry *entry;
char name[MDB_MAX_OBJ_NAME+1];
int num_cols;
GPtrArray *columns;
int num_rows;
int index_start;
int num_real_idxs;
int num_idxs;
GPtrArray *indices;
guint32 first_data_pg;
guint32 cur_pg_num;
guint32 cur_phys_pg;
int cur_row;
int noskip_del; /* don't skip deleted rows */
/* object allocation map */
guint32 map_base_pg;
int map_sz;
unsigned char *usage_map;
/* pages with free space left */
guint32 freemap_base_pg;
int freemap_sz;
unsigned char *free_usage_map;
/* query planner */
MdbSargNode *sarg_tree;
MdbStrategy strategy;
MdbIndex *scan_idx;
MdbHandle *mdbidx;
MdbIndexChain *chain;
} MdbTableDef;
struct mdbindex {
int index_num;
char name[MDB_MAX_OBJ_NAME+1];
unsigned char index_type;
guint32 first_pg;
int num_rows; /* number rows in index */
int num_keys;
short key_col_num[MDB_MAX_IDX_COLS];
unsigned char key_col_order[MDB_MAX_IDX_COLS];
unsigned char flags;
MdbTableDef *table;
};
typedef struct {
char name[MDB_MAX_OBJ_NAME+1];
} MdbColumnProp;
typedef struct {
void *value;
int siz;
@@ -271,18 +319,11 @@ typedef struct {
int offset;
} MdbField;
typedef union {
int i;
double d;
char s[256];
} MdbAny;
typedef struct {
int op;
MdbAny value;
} MdbSarg;
/* mem.c */
extern void mdb_init();
extern void mdb_exit();
@@ -293,6 +334,8 @@ extern MdbTableDef *mdb_alloc_tabledef(MdbCatalogEntry *entry);
extern void mdb_alloc_catalog(MdbHandle *mdb);
extern MdbFile *mdb_alloc_file();
extern void mdb_free_file(MdbFile *f);
extern void mdb_append_index(GPtrArray *indices, MdbIndex *in_idx);
extern MdbStatistics *mdb_alloc_stats(MdbHandle *mdb);
/* file.c */
extern size_t mdb_read_pg(MdbHandle *mdb, unsigned long pg);
@@ -304,8 +347,11 @@ extern long mdb_get_int32(MdbHandle *mdb, int offset);
extern float mdb_get_single(MdbHandle *mdb, int offset);
extern double mdb_get_double(MdbHandle *mdb, int offset);
extern MdbHandle *mdb_open(char *filename);
extern void mdb_close(MdbHandle *mdb);
extern MdbHandle *mdb_clone_handle(MdbHandle *mdb);
extern void mdb_swap_pgbuf(MdbHandle *mdb);
extern long _mdb_get_int32(unsigned char *buf, int offset);
extern gint32 mdb_get_int24_msb(MdbHandle *mdb, int offset);
/* catalog.c */
GPtrArray *mdb_read_catalog(MdbHandle *mdb, int obj_type);
@@ -313,11 +359,12 @@ extern void mdb_catalog_dump(MdbHandle *mdb, int obj_type);
extern int mdb_catalog_rows(MdbHandle *mdb);
extern MdbCatalogEntry *mdb_get_catalog_entry(MdbHandle *mdb, int rowid, MdbCatalogEntry *entry);
extern char *mdb_get_objtype_string(int obj_type);
extern void mdb_dump_catalog(MdbHandle *mdb, int obj_type);
/* table.c */
extern MdbTableDef *mdb_read_table(MdbCatalogEntry *entry);
extern GPtrArray *mdb_read_columns(MdbTableDef *table);
extern void mdb_table_dump(MdbCatalogEntry *entry);
/* data.c */
extern void mdb_data_dump(MdbTableDef *table);
@@ -327,7 +374,9 @@ extern int mdb_fetch_row(MdbTableDef *table);
extern int mdb_is_fixed_col(MdbColumn *col);
extern char *mdb_col_to_string(MdbHandle *mdb, int start, int datatype, int size);
extern int mdb_find_end_of_row(MdbHandle *mdb, int row);
extern int mdb_col_fixed_size(MdbColumn *col);
extern int mdb_col_disp_size(MdbColumn *col);
extern void mdb_bind_len(MdbTableDef *table, int col_num, int *len_ptr);
/* dump.c */
extern void buffer_dump(const unsigned char* buf, int start, int end);
@@ -340,9 +389,21 @@ extern int mdb_set_default_backend(MdbHandle *mdb, char *backend_name);
extern char *mdb_get_relationships(MdbHandle *mdb);
/* sargs.c */
extern int mdb_test_sargs(MdbHandle *mdb, MdbColumn *col, int offset, int len);
extern int mdb_test_sargs(MdbTableDef *table, MdbField *fields, int num_fields);
extern int mdb_test_sarg(MdbColumn *col, MdbSargNode *node, void *buf, int len);
extern void mdb_sql_walk_tree(MdbSargNode *node, MdbSargTreeFunc func, gpointer data);
extern int mdb_find_indexable_sargs(MdbSargNode *node, gpointer data);
/* index.c */
extern GPtrArray *mdb_read_indices(MdbTableDef *table);
extern void mdb_index_dump(MdbTableDef *table, MdbIndex *idx);
/* stats.c */
extern void mdb_stats_on(MdbHandle *mdb);
extern void mdb_stats_off(MdbHandle *mdb);
extern void mdb_dump_stats(MdbHandle *mdb);
/* like.c */
extern int mdb_like_cmp(char *s, char *r);
#endif /* _mdbtools_h_ */