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Overview
| Comment: | Enhance the pgidx of the showdb utility so that it provides better information even if the sqlite_master table is corrupt. |
|---|---|
| Downloads: | Tarball | ZIP archive | SQL archive |
| Timelines: | family | ancestors | descendants | both | trunk |
| Files: | files | file ages | folders |
| SHA1: |
d14263a719101d9c70054f2fc37e7788 |
| User & Date: | drh 2013-02-19 18:45:11 |
Context
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2013-02-19
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| 20:25 | Fix the showdb utility so that it displays the correct secondary usage of a page when reporting on an error of a page being used more than once. check-in: 4507f0b3 user: drh tags: trunk | |
| 18:45 | Enhance the pgidx of the showdb utility so that it provides better information even if the sqlite_master table is corrupt. check-in: d14263a7 user: drh tags: trunk | |
| 18:34 | Do not rollback the schema if a parsing error occurs while parsing the schema and writable_schema is set. check-in: 680d3ab5 user: drh tags: trunk | |
Changes
Changes to tool/showdb.c.
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}
}
/*
** Try to figure out how every page in the database file is being used.
*/
static void page_usage_report(const char *zDbName){
int i;
int rc;
sqlite3 *db;
sqlite3_stmt *pStmt;
unsigned char *a;
/* Avoid the pathological case */
if( mxPage<1 ){
printf("empty database\n");
return;
}
................................................................................
memset(zPageUse, 0, sizeof(zPageUse[0])*(mxPage+1));
/* Discover the usage of each page */
a = getContent(0, 100);
page_usage_freelist(decodeInt32(a+32));
free(a);
page_usage_btree(1, 0, 0, "sqlite_master");
rc = sqlite3_prepare_v2(db,
"SELECT type, name, rootpage FROM SQLITE_MASTER WHERE rootpage",
-1, &pStmt, 0);
if( rc==SQLITE_OK ){
while( sqlite3_step(pStmt)==SQLITE_ROW ){
int pgno = sqlite3_column_int(pStmt, 2);
page_usage_btree(pgno, 0, 0, sqlite3_column_text(pStmt, 1));
}
}else{
printf("ERROR: cannot query database: %s\n", sqlite3_errmsg(db));
}
sqlite3_finalize(pStmt);
sqlite3_close(db);
/* Print the report and free memory used */
for(i=1; i<=mxPage; i++){
printf("%5d: %s\n", i, zPageUse[i] ? zPageUse[i] : "???");
sqlite3_free(zPageUse[i]);
}
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}
}
/*
** Try to figure out how every page in the database file is being used.
*/
static void page_usage_report(const char *zDbName){
int i, j;
int rc;
sqlite3 *db;
sqlite3_stmt *pStmt;
unsigned char *a;
char zQuery[200];
/* Avoid the pathological case */
if( mxPage<1 ){
printf("empty database\n");
return;
}
................................................................................
memset(zPageUse, 0, sizeof(zPageUse[0])*(mxPage+1));
/* Discover the usage of each page */
a = getContent(0, 100);
page_usage_freelist(decodeInt32(a+32));
free(a);
page_usage_btree(1, 0, 0, "sqlite_master");
sqlite3_exec(db, "PRAGMA writable_schema=ON", 0, 0, 0);
for(j=0; j<2; j++){
sqlite3_snprintf(sizeof(zQuery), zQuery,
"SELECT type, name, rootpage FROM SQLITE_MASTER WHERE rootpage"
" ORDER BY rowid %s", j?"DESC":"");
rc = sqlite3_prepare_v2(db, zQuery, -1, &pStmt, 0);
if( rc==SQLITE_OK ){
while( sqlite3_step(pStmt)==SQLITE_ROW ){
int pgno = sqlite3_column_int(pStmt, 2);
page_usage_btree(pgno, 0, 0, sqlite3_column_text(pStmt, 1));
}
}else{
printf("ERROR: cannot query database: %s\n", sqlite3_errmsg(db));
}
rc = sqlite3_finalize(pStmt);
if( rc==SQLITE_OK ) break;
}
sqlite3_close(db);
/* Print the report and free memory used */
for(i=1; i<=mxPage; i++){
printf("%5d: %s\n", i, zPageUse[i] ? zPageUse[i] : "???");
sqlite3_free(zPageUse[i]);
}
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