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Changes to comments. In particular, a lengthy comment was added to encode.c

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that explains how the encoder algorithm works. (CVS 966)

FossilOrigin-Name: 8b388b2f690dbfd50eefc0fdede1c7785f78afa1
This commit is contained in:
drh
2003-05-10 03:36:53 +00:00
parent a3643a2697
commit 5fe2d8c913
5 changed files with 125 additions and 25 deletions
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16
src/vdbe.c
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@@ -36,7 +36,7 @@
** in this file for details. If in doubt, do not deviate from existing
** commenting and indentation practices when changing or adding code.
**
** $Id: vdbe.c,v 1.221 2003/05/02 14:32:14 drh Exp $
** $Id: vdbe.c,v 1.222 2003/05/10 03:36:54 drh Exp $
*/
#include "sqliteInt.h"
#include <ctype.h>
@@ -3453,10 +3453,10 @@ case OP_OpenWrite: {
/* Opcode: OpenTemp P1 P2 *
**
** Open a new cursor that points to a table or index in a temporary
** database file. The temporary file is opened read/write even if
** the main database is read-only. The temporary file is deleted
** when the cursor is closed.
** Open a new cursor to a transient table.
** The transient cursor is always opened read/write even if
** the main database is read-only. The transient table is deleted
** automatically when the cursor is closed.
**
** The cursor points to a BTree table if P2==0 and to a BTree index
** if P2==1. A BTree table must have an integer key and can have arbitrary
@@ -3464,7 +3464,7 @@ case OP_OpenWrite: {
**
** This opcode is used for tables that exist for the duration of a single
** SQL statement only. Tables created using CREATE TEMPORARY TABLE
** are opened using OP_OpenAux or OP_OpenWrAux. "Temporary" in the
** are opened using OP_OpenRead or OP_OpenWrite. "Temporary" in the
** context of this opcode means for the duration of a single SQL statement
** whereas "Temporary" in the context of CREATE TABLE means for the duration
** of the connection to the database. Same word; different meanings.
@@ -3997,8 +3997,8 @@ case OP_Delete: {
/* Opcode: KeyAsData P1 P2 *
**
** Turn the key-as-data mode for cursor P1 either on (if P2==1) or
** off (if P2==0). In key-as-data mode, the Field opcode pulls
** data off of the key rather than the data. This is useful for
** off (if P2==0). In key-as-data mode, the OP_Column opcode pulls
** data off of the key rather than the data. This is used for
** processing compound selects.
*/
case OP_KeyAsData: {