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Add the ".imposter" command to the command-line shell.

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FossilOrigin-Name: be3ec8fdcf1541017ca9375df07645db2a9a3f5a
This commit is contained in:
drh
2016-11-03 13:01:38 +00:00
parent 6027561178
commit 16eb59484f
3 changed files with 75 additions and 7 deletions
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68
src/shell.c
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@@ -2164,6 +2164,9 @@ static char zHelp[] =
".headers on|off Turn display of headers on or off\n"
".help Show this message\n"
".import FILE TABLE Import data from FILE into TABLE\n"
#ifndef SQLITE_OMIT_TEST_CONTROL
".imposter INDEX TABLE Create imposter table TABLE on index INDEX\n"
#endif
".indexes ?TABLE? Show names of all indexes\n"
" If TABLE specified, only show indexes for tables\n"
" matching LIKE pattern TABLE.\n"
@@ -3846,6 +3849,68 @@ static int do_meta_command(char *zLine, ShellState *p){
}
}else
#ifndef SQLITE_OMIT_BUILTIN_TEST
if( c=='i' && strncmp(azArg[0], "imposter", n)==0 ){
char *zSql;
char *zCollist = 0;
sqlite3_stmt *pStmt;
int tnum = 0;
if( nArg!=3 ){
utf8_printf(stderr, "Usage: .imposter INDEX IMPOSTER\n");
rc = 1;
goto meta_command_exit;
}
open_db(p, 0);
zSql = sqlite3_mprintf("SELECT rootpage FROM sqlite_master"
" WHERE name='%q' AND type='index'", azArg[1]);
sqlite3_prepare_v2(p->db, zSql, -1, &pStmt, 0);
sqlite3_free(zSql);
if( sqlite3_step(pStmt)==SQLITE_ROW ){
tnum = sqlite3_column_int(pStmt, 0);
}
sqlite3_finalize(pStmt);
if( tnum==0 ){
utf8_printf(stderr, "no such index: \"%s\"\n", azArg[1]);
rc = 1;
goto meta_command_exit;
}
zSql = sqlite3_mprintf("PRAGMA index_xinfo='%q'", azArg[1]);
rc = sqlite3_prepare_v2(p->db, zSql, -1, &pStmt, 0);
sqlite3_free(zSql);
while( sqlite3_step(pStmt)==SQLITE_ROW ){
const char *zCol = (const char*)sqlite3_column_text(pStmt,2);
if( zCol==0 ) zCol = "_ROWID_";
if( zCollist==0 ){
zCollist = sqlite3_mprintf("\"%w\"", zCol);
}else{
zCollist = sqlite3_mprintf("%z,\"%w\"", zCollist, zCol);
}
}
sqlite3_finalize(pStmt);
zSql = sqlite3_mprintf(
"CREATE TABLE \"%w\"(%s,PRIMARY KEY(%s))WITHOUT ROWID",
azArg[2], zCollist, zCollist);
sqlite3_free(zCollist);
rc = sqlite3_test_control(SQLITE_TESTCTRL_IMPOSTER, p->db, "main", 1, tnum);
if( rc==SQLITE_OK ){
rc = sqlite3_exec(p->db, zSql, 0, 0, 0);
sqlite3_test_control(SQLITE_TESTCTRL_IMPOSTER, p->db, "main", 0, 0);
if( rc ){
utf8_printf(stderr, "Error in [%s]: %s\n", zSql, sqlite3_errmsg(p->db));
}else{
utf8_printf(stdout, "%s;\n", zSql);
utf8_printf(stdout,
"WARNING: writing to an imposter table will corrupt the index!\n"
);
}
}else{
utf8_printf(stderr, "SQLITE_TESTCTRL_IMPOSTER returns %d\n", rc);
rc = 1;
}
sqlite3_free(zSql);
}else
#endif /* !defined(SQLITE_OMIT_TEST_CONTROL) */
#ifdef SQLITE_ENABLE_IOTRACE
if( c=='i' && strncmp(azArg[0], "iotrace", n)==0 ){
SQLITE_API extern void (SQLITE_CDECL *sqlite3IoTrace)(const char*, ...);
@@ -3868,6 +3933,7 @@ static int do_meta_command(char *zLine, ShellState *p){
}
}else
#endif
if( c=='l' && n>=5 && strncmp(azArg[0], "limits", n)==0 ){
static const struct {
const char *zLimitName; /* Name of a limit */
@@ -4708,6 +4774,7 @@ static int do_meta_command(char *zLine, ShellState *p){
}
}else
#ifndef SQLITE_OMIT_BUILTIN_TEST
if( c=='t' && n>=8 && strncmp(azArg[0], "testctrl", n)==0 && nArg>=2 ){
static const struct {
const char *zCtrlName; /* Name of a test-control option */
@@ -4883,6 +4950,7 @@ static int do_meta_command(char *zLine, ShellState *p){
}
#endif
}else
#endif /* !defined(SQLITE_OMIT_BUILTIN_TEST) */
#if SQLITE_USER_AUTHENTICATION
if( c=='u' && strncmp(azArg[0], "user", n)==0 ){