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Fix for deleted rows.

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This commit is contained in:
xone47 2000-09-28 15:12:31 +00:00
parent 62dc667342
commit 3d27220a3a
1 changed files with 24 additions and 22 deletions
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46
src/libmdb/data.c
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@ -33,25 +33,22 @@ MdbColumn *col;
}
int mdb_find_end_of_row(MdbHandle *mdb, int row)
{
int rows, row_start, row_end, i;
int row_start, row_end, i;
rows = mdb_get_int16(mdb,8);
if (row==0)
row_end = mdb->pg_size - 1; /* end of page */
else {
row_end = mdb_get_int16(mdb, (10 + (row-1) * 2)) - 1;
/* Search the previous "row start" values for the first non-deleted one.
* If we don't find one, then the end of the page is the correct value.
*/
for (i = row - 1; i >= 0; i--) {
row_start = mdb_get_int16(mdb, (10 + i * 2));
if (!(row_start & 0x8000)) {
break;
}
}
for (i = row - 1; i > 0; i--) {
row_start = mdb_get_int16(mdb, (10 + i * 2));
if (!(row_start & 0x8000)) {
break;
}
}
if (i == 0) {
row_end = mdb->pg_size - 1;
} else {
row_end = row_start - 1;
}
if (i == -1) {
row_end = mdb->pg_size - 1;
} else {
row_end = row_start - 1;
}
return row_end;
@ -108,8 +105,7 @@ unsigned char null_mask[33]; /* 256 columns max / 8 bits per byte */
delflag ? "[delflag]" : "");
#endif
if (delflag || lookupflag) {
row_end = row_start-1;
return 0;
return -1;
}
#if MDB_DEBUG
@ -181,7 +177,7 @@ unsigned char null_mask[33]; /* 256 columns max / 8 bits per byte */
}
}
row_end = row_start-1;
return 0;
}
int mdb_read_next_dpg(MdbTableDef *table)
{
@ -223,8 +219,14 @@ int rows;
if (!mdb_read_next_dpg(table)) return 0;
}
mdb_read_row(table,
table->cur_row);
/* Skip over any deleted rows.
* mdb_read_row() returns -1 on deleted rows.
* mdb_read_row() returns 0 on actual rows.
*/
while(mdb_read_row(table,
table->cur_row)) {
table->cur_row++;
}
table->cur_row++;
return 1;