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support for compressed index keys and trailing leaves

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This commit is contained in:
brianb
2004-02-11 22:05:13 +00:00
parent 06115eaf59
commit a62f26df50
5 changed files with 139 additions and 44 deletions
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25
src/libmdb/table.c
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@@ -44,13 +44,15 @@ unsigned char mdb_col_needs_size(int col_type)
}
}
MdbTableDef *mdb_read_table(MdbCatalogEntry *entry)
MdbTableDef *
mdb_read_table(MdbCatalogEntry *entry)
{
MdbTableDef *table;
MdbHandle *mdb = entry->mdb;
MdbFormatConstants *fmt = mdb->fmt;
int len;
int rownum, row_start, row_end;
MdbTableDef *table;
MdbHandle *mdb = entry->mdb;
MdbFormatConstants *fmt = mdb->fmt;
int len;
int rownum, row_start, row_end;
guint32 pg;
table = mdb_alloc_tabledef(entry);
@@ -66,7 +68,8 @@ int rownum, row_start, row_end;
/* grab a copy of the usage map */
rownum = mdb->pg_buf[fmt->tab_usage_map_offset];
mdb_read_alt_pg(mdb, mdb_pg_get_int24(mdb, fmt->tab_usage_map_offset + 1));
pg = mdb_pg_get_int24(mdb, fmt->tab_usage_map_offset + 1);
mdb_read_alt_pg(mdb, pg);
mdb_swap_pgbuf(mdb);
row_start = mdb_pg_get_int16(mdb, (fmt->row_count_offset + 2) + (rownum*2));
row_end = mdb_find_end_of_row(mdb, rownum);
@@ -79,7 +82,7 @@ int rownum, row_start, row_end;
/* swap back */
mdb_swap_pgbuf(mdb);
#if MDB_DEBUG_USAGE
printf ("usage map found on page %ld start %d end %d\n", mdb_pg_get_int24(mdb, fmt->tab_usage_map_offset + 1), row_start, row_end);
printf ("usage map found on page %ld rownum %d start %d end %d\n", mdb_pg_get_int24(mdb, fmt->tab_usage_map_offset + 1), rownum, row_start, row_end);
#endif
@@ -96,6 +99,9 @@ int rownum, row_start, row_end;
memcpy(table->free_usage_map, &mdb->pg_buf[row_start], table->freemap_sz);
mdb_swap_pgbuf(mdb);
#endif
#if MDB_DEBUG_USAGE
printf ("free map found on page %ld rownum %d start %d end %d\n", mdb_pg_get_int24(mdb, fmt->tab_free_map_offset + 1), rownum, row_start, row_end);
#endif
table->first_data_pg = mdb_pg_get_int16(mdb, fmt->tab_first_dpg_offset);
@@ -326,6 +332,8 @@ guint32 pgnum;
}
if (table->usage_map) {
printf("pages reserved by this object\n");
printf("usage map pg %lu\n", table->map_base_pg);
printf("free map pg %lu\n", table->freemap_base_pg);
pgnum = mdb_get_int32(table->usage_map,1);
/* the first 5 bytes of the usage map mean something */
coln = 0;
@@ -342,5 +350,6 @@ guint32 pgnum;
pgnum++;
}
}
printf("\n");
}
}