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Overview
| Comment: | Enhance comments on the SrcList object definition to better explain the operation of the SrcList.a[].colUsed field. No changes to code. |
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| Downloads: | Tarball | ZIP archive |
| Timelines: | family | ancestors | descendants | both | experimental |
| Files: | files | file ages | folders |
| SHA1: |
c0f67ea131c3e237e46311b1a3dcb3fe |
| User & Date: | drh 2010-04-07 14:33:07.000 |
Context
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2010-04-07
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| 14:59 | Make sure that all automatic indices are covering indices. Otherwise, the table and index might be used together in a query but the table could get out of sync with the automatic index through out-of-band changes. (check-in: 2364313142 user: drh tags: experimental) | |
| 14:33 | Enhance comments on the SrcList object definition to better explain the operation of the SrcList.a[].colUsed field. No changes to code. (check-in: c0f67ea131 user: drh tags: experimental) | |
| 14:32 | Fix the trace output of the OP_Function opcode to show the correct register numbers. (check-in: 064c283eee user: drh tags: experimental) | |
Changes
Changes to src/sqliteInt.h.
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1770 1771 1772 1773 1774 1775 1776 1777 1778 1779 1780 1781 1782 1783 |
** such a table must be a simple name: ID. But in SQLite, the table can
** now be identified by a database name, a dot, then the table name: ID.ID.
**
** The jointype starts out showing the join type between the current table
** and the next table on the list. The parser builds the list this way.
** But sqlite3SrcListShiftJoinType() later shifts the jointypes so that each
** jointype expresses the join between the table and the previous table.
*/
struct SrcList {
i16 nSrc; /* Number of tables or subqueries in the FROM clause */
i16 nAlloc; /* Number of entries allocated in a[] below */
struct SrcList_item {
char *zDatabase; /* Name of database holding this table */
char *zName; /* Name of the table */
| > > > | 1770 1771 1772 1773 1774 1775 1776 1777 1778 1779 1780 1781 1782 1783 1784 1785 1786 |
** such a table must be a simple name: ID. But in SQLite, the table can
** now be identified by a database name, a dot, then the table name: ID.ID.
**
** The jointype starts out showing the join type between the current table
** and the next table on the list. The parser builds the list this way.
** But sqlite3SrcListShiftJoinType() later shifts the jointypes so that each
** jointype expresses the join between the table and the previous table.
**
** In the colUsed field, the high-order bit (bit 63) is set if the table
** contains more than 63 columns and the 64-th or later column is used.
*/
struct SrcList {
i16 nSrc; /* Number of tables or subqueries in the FROM clause */
i16 nAlloc; /* Number of entries allocated in a[] below */
struct SrcList_item {
char *zDatabase; /* Name of database holding this table */
char *zName; /* Name of the table */
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| ︙ | ︙ |