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Overview
| Comment: | Adjust the command-line shell EXPLAIN indentation logic to handle the second loop of an UPDATE that reads out a RowSet. |
|---|---|
| Downloads: | Tarball | ZIP archive |
| Timelines: | family | ancestors | descendants | both | trunk |
| Files: | files | file ages | folders |
| SHA1: |
ea141a9b87dbb5fa1402bf7f6e36e89c |
| User & Date: | drh 2013-11-14 23:59:33.676 |
Context
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2013-11-15
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| 03:16 | Another adjustment to the EXPLAIN indentation logic, in order to deal with the sorter loop on a CREATE INDEX statement. (check-in: cbe85cc2a9 user: drh tags: trunk) | |
| 01:10 | Rework the logic that factors constant expressions out of inner loops, making it both simpler and faster. (check-in: 8dc5c76c76 user: drh tags: expr-codegen-enhancement) | |
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2013-11-14
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| 23:59 | Adjust the command-line shell EXPLAIN indentation logic to handle the second loop of an UPDATE that reads out a RowSet. (check-in: ea141a9b87 user: drh tags: trunk) | |
| 19:34 | Remove an unused local variable. (check-in: 10d5922638 user: drh tags: trunk) | |
Changes
Changes to src/shell.c.
| ︙ | ︙ | |||
1169 1170 1171 1172 1173 1174 1175 | ** ** The indenting rules are: ** ** * For each "Next", "Prev", "VNext" or "VPrev" instruction, indent ** all opcodes that occur between the p2 jump destination and the opcode ** itself by 2 spaces. ** | | | > | | | 1169 1170 1171 1172 1173 1174 1175 1176 1177 1178 1179 1180 1181 1182 1183 1184 1185 1186 1187 1188 1189 1190 1191 1192 1193 1194 1195 1196 1197 |
**
** The indenting rules are:
**
** * For each "Next", "Prev", "VNext" or "VPrev" instruction, indent
** all opcodes that occur between the p2 jump destination and the opcode
** itself by 2 spaces.
**
** * For each "Goto", if the jump destination is earlier in the program
** and ends on one of:
** Yield SeekGt SeekLt RowSetRead
** then indent all opcodes between the earlier instruction
** and "Goto" by 2 spaces.
*/
static void explain_data_prepare(struct callback_data *p, sqlite3_stmt *pSql){
const char *zSql; /* The text of the SQL statement */
const char *z; /* Used to check if this is an EXPLAIN */
int *abYield = 0; /* True if op is an OP_Yield */
int nAlloc = 0; /* Allocated size of p->aiIndent[], abYield */
int iOp;
const char *azNext[] = { "Next", "Prev", "VPrev", "VNext", 0 };
const char *azYield[] = { "Yield", "SeekLt", "SeekGt", "RowSetRead", 0 };
const char *azGoto[] = { "Goto", 0 };
/* Try to figure out if this is really an EXPLAIN statement. If this
** cannot be verified, return early. */
zSql = sqlite3_sql(pSql);
if( zSql==0 ) return;
for(z=zSql; *z==' ' || *z=='\t' || *z=='\n' || *z=='\f' || *z=='\r'; z++);
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| ︙ | ︙ |