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filled in a few more bits in the table def.

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James Ahlborn
2011-03-30 23:14:03 -04:00
parent cadbc749b0
commit 0f8556bc99
1 changed files with 10 additions and 7 deletions
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17
HACKING
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@@ -374,7 +374,8 @@ next_pg field.
| ???? | 4 bytes | num_rows | Number of records in this table |
| 0x00 | 4 bytes | autonumber | value for the next value of the |
| | | | autonumber column, if any. 0 otherwise |
| ???? |16 bytes | unknown | unknown |
| 0x01 | 1 byte | autonum_flag| 0x01 makes autonumbers work in access |
| ???? |15 bytes | unknown | unknown |
| 0x4e | 1 byte | table_type | 0x4e: user table, 0x53: system table |
| ???? | 2 bytes | max_cols | Max columns a row will have (deletions) |
| ???? | 2 bytes | num_var_cols| Number of variable columns in table |
@@ -399,12 +400,14 @@ next_pg field.
| ???? | 2 bytes | col_num | Column Number (includes deleted columns) |
| ???? | 2 bytes | offset_V | Offset for variable length columns |
| ???? | 2 bytes | col_num | Column Number |
| ???? | 4 bytes | ??? | prec/scale? or LCID (0x409=English)? |
| ???? | 1 byte | bitmask | See column flags bellow |
| ???? | 1 byte | ??? | seems to be 1 when variable len |
| ???? | 2 bytes | misc | prec/scale (1 byte each), or sort order |
| | | | for textual columns(0x409=General) |
| ???? | 2 bytes | ??? | |
| ???? | 1 byte | bitmask | See column flags below |
| ???? | 1 byte | misc_flags | 0x01 for compressed unicode |
| 0000 | 4 bytes | ??? | |
| ???? | 2 bytes | offset_F | Offset for fixed length columns |
| ???? | 2 bytes | col_len | Length of the column (0 if memo) |
| ???? | 2 bytes | col_len | Length of the column (0 if memo/ole) |
+-------------------------------------------------------------------------+
| Iterate for the number of num_cols (n*2 bytes per column) |
+-------------------------------------------------------------------------+
@@ -453,8 +456,8 @@ next_pg field.
+-------------------------------------------------------------------------+
Columns flags (not complete):
0x01: variable length column
0x02: can be null
0x01: fixed length column
0x02: can be null (possibly related to joins?)
0x04: is auto long
0x10: replication related field (or hidden?). These columns start with "s_" or
"Gen_" (the "Gen_" fields are for memo fields)