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Overview
| Comment: | Add the ".shared-schema check|fix DB1 DB2..." command to the shell tool. For checking if a database is eligible to share an in-memory with the main database, and for fixing small problems that prevent it from being so. |
|---|---|
| Downloads: | Tarball | ZIP archive | SQL archive |
| Timelines: | family | ancestors | descendants | both | reuse-schema |
| Files: | files | file ages | folders |
| SHA3-256: |
7d8e8a957235479fba568e1d3ff2cdfe |
| User & Date: | dan 2019-02-26 15:43:45 |
| Wiki: | reuse-schema |
Context
|
2019-02-26
| ||
| 16:13 | Add new test file reuse5.test. For testing the shell tool ".shared-schema" command. (check-in: fa6008d5 user: dan tags: reuse-schema) | |
| 15:43 | Add the ".shared-schema check|fix DB1 DB2..." command to the shell tool. For checking if a database is eligible to share an in-memory with the main database, and for fixing small problems that prevent it from being so. (check-in: 7d8e8a95 user: dan tags: reuse-schema) | |
|
2019-02-25
| ||
| 19:23 | Fix a comment in build.c. (check-in: d6a9bff6 user: dan tags: reuse-schema) | |
Changes
Changes to src/shell.c.in.
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);
}
}
return rc;
}
#endif /* ifndef SQLITE_OMIT_VIRTUALTABLE */
/*
** Execute a statement or set of statements. Print
** any result rows/columns depending on the current mode
** set via the supplied callback.
**
** This is very similar to SQLite's built-in sqlite3_exec()
................................................................................
return SQLITE_ERROR;
}
#if !defined(SQLITE_OMIT_VIRTUALTABLE) && defined(SQLITE_HAVE_ZLIB)
/*********************************************************************************
** The ".archive" or ".ar" command.
*/
static void shellPrepare(
sqlite3 *db,
int *pRc,
const char *zSql,
sqlite3_stmt **ppStmt
){
*ppStmt = 0;
if( *pRc==SQLITE_OK ){
int rc = sqlite3_prepare_v2(db, zSql, -1, ppStmt, 0);
if( rc!=SQLITE_OK ){
raw_printf(stderr, "sql error: %s (%d)\n",
sqlite3_errmsg(db), sqlite3_errcode(db)
);
*pRc = rc;
}
}
}
static void shellPreparePrintf(
sqlite3 *db,
int *pRc,
sqlite3_stmt **ppStmt,
const char *zFmt,
...
){
*ppStmt = 0;
if( *pRc==SQLITE_OK ){
va_list ap;
char *z;
va_start(ap, zFmt);
z = sqlite3_vmprintf(zFmt, ap);
va_end(ap);
if( z==0 ){
*pRc = SQLITE_NOMEM;
}else{
shellPrepare(db, pRc, z, ppStmt);
sqlite3_free(z);
}
}
}
static void shellFinalize(
int *pRc,
sqlite3_stmt *pStmt
){
if( pStmt ){
sqlite3 *db = sqlite3_db_handle(pStmt);
int rc = sqlite3_finalize(pStmt);
if( *pRc==SQLITE_OK ){
if( rc!=SQLITE_OK ){
raw_printf(stderr, "SQL error: %s\n", sqlite3_errmsg(db));
}
*pRc = rc;
}
}
}
static void shellReset(
int *pRc,
sqlite3_stmt *pStmt
){
int rc = sqlite3_reset(pStmt);
if( *pRc==SQLITE_OK ){
if( rc!=SQLITE_OK ){
sqlite3 *db = sqlite3_db_handle(pStmt);
raw_printf(stderr, "SQL error: %s\n", sqlite3_errmsg(db));
}
*pRc = rc;
}
}
/*
** Structure representing a single ".ar" command.
*/
typedef struct ArCommand ArCommand;
struct ArCommand {
u8 eCmd; /* An AR_CMD_* value */
u8 bVerbose; /* True if --verbose */
................................................................................
if( bDebug ){
utf8_printf(p->out, "%s\n", zSql);
}else{
shell_exec(p, zSql, 0);
}
sqlite3_free(zSql);
}else
#ifndef SQLITE_NOHAVE_SYSTEM
if( c=='s'
&& (strncmp(azArg[0], "shell", n)==0 || strncmp(azArg[0],"system",n)==0)
){
char *zCmd;
int i, x;
|
> > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > < < < < < < < < < < < < < < | < < < < < < < < < < < < < < < < < < < < < < < < < < < < < < < < < < < < < < < < < < < < < < < < < < < < < < < > > > > > |
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);
}
}
return rc;
}
#endif /* ifndef SQLITE_OMIT_VIRTUALTABLE */
static void shellPrepare(
sqlite3 *db,
int *pRc,
const char *zSql,
sqlite3_stmt **ppStmt
){
*ppStmt = 0;
if( *pRc==SQLITE_OK ){
int rc = sqlite3_prepare_v2(db, zSql, -1, ppStmt, 0);
if( rc!=SQLITE_OK ){
raw_printf(stderr, "sql error: %s (%d)\n",
sqlite3_errmsg(db), sqlite3_errcode(db)
);
*pRc = rc;
}
}
}
static void shellExecPrintf(
sqlite3 *db,
int *pRc,
const char *zFmt,
...
){
if( *pRc==SQLITE_OK ){
va_list ap;
char *z;
va_start(ap, zFmt);
z = sqlite3_vmprintf(zFmt, ap);
va_end(ap);
if( z==0 ){
*pRc = SQLITE_NOMEM;
}else{
*pRc = sqlite3_exec(db, z, 0, 0, 0);
sqlite3_free(z);
}
}
}
static void shellPreparePrintf(
sqlite3 *db,
int *pRc,
sqlite3_stmt **ppStmt,
const char *zFmt,
...
){
*ppStmt = 0;
if( *pRc==SQLITE_OK ){
va_list ap;
char *z;
va_start(ap, zFmt);
z = sqlite3_vmprintf(zFmt, ap);
va_end(ap);
if( z==0 ){
*pRc = SQLITE_NOMEM;
}else{
shellPrepare(db, pRc, z, ppStmt);
sqlite3_free(z);
}
}
}
static void shellFinalize(
int *pRc,
sqlite3_stmt *pStmt
){
if( pStmt ){
sqlite3 *db = sqlite3_db_handle(pStmt);
int rc = sqlite3_finalize(pStmt);
if( *pRc==SQLITE_OK ){
if( rc!=SQLITE_OK ){
raw_printf(stderr, "SQL error: %s\n", sqlite3_errmsg(db));
}
*pRc = rc;
}
}
}
static void shellReset(
int *pRc,
sqlite3_stmt *pStmt
){
int rc = sqlite3_reset(pStmt);
if( *pRc==SQLITE_OK ){
if( rc!=SQLITE_OK ){
sqlite3 *db = sqlite3_db_handle(pStmt);
raw_printf(stderr, "SQL error: %s\n", sqlite3_errmsg(db));
}
*pRc = rc;
}
}
static int sharedSchemaFix(ShellState *pState, const char *zDb, int eFix){
int rc = SQLITE_OK;
i64 iLast = 0;
int iCookie = 0;
int iAutoVacuum = 0;
sqlite3_stmt *pStmt = 0;
shellExecPrintf(pState->db, &rc, "ATTACH '%q' AS _shared_schema_tmp", zDb);
shellExecPrintf(pState->db, &rc, "PRAGMA writable_schema = 1");
shellExecPrintf(pState->db, &rc, "BEGIN");
shellPreparePrintf(pState->db, &rc, &pStmt,
"SELECT max(rowid) FROM _shared_schema_tmp.sqlite_master"
);
sqlite3_step(pStmt);
iLast = sqlite3_column_int64(pStmt, 0);
shellFinalize(&rc, pStmt);
shellPreparePrintf(pState->db, &rc, &pStmt,
"INSERT INTO _shared_schema_tmp.sqlite_master SELECT "
" type, name, tbl_name, ("
" SELECT rootpage FROM _shared_schema_tmp.sqlite_master WHERE "
" type IS o.type AND name IS o.name AND rowid<=?"
" ), sql FROM main.sqlite_master AS o"
);
sqlite3_bind_int64(pStmt, 1, iLast);
sqlite3_step(pStmt);
shellFinalize(&rc, pStmt);
shellExecPrintf(pState->db, &rc,
"DELETE FROM _shared_schema_tmp.sqlite_master WHERE rowid<=%lld",
iLast
);
shellExecPrintf(pState->db, &rc, "COMMIT");
sqlite3_exec(pState->db, "PRAGMA writable_schema = 0", 0, 0, 0);
/* Copy the auto-vacuum setting from main to the target db */
shellPreparePrintf(pState->db, &rc, &pStmt, "PRAGMA main.auto_vacuum");
sqlite3_step(pStmt);
iAutoVacuum = sqlite3_column_int(pStmt, 0);
shellFinalize(&rc, pStmt);
shellExecPrintf(pState->db, &rc,
"PRAGMA _shared_schema_tmp.auto_vacuum = %d", iAutoVacuum
);
/* Vacuum the db in order to standardize the rootpage numbers. */
shellExecPrintf(pState->db, &rc, "VACUUM _shared_schema_tmp");
/* Set the schema-cookie value to the same as database "main" */
shellPreparePrintf(pState->db, &rc, &pStmt, "PRAGMA main.schema_version");
sqlite3_step(pStmt);
iCookie = sqlite3_column_int(pStmt, 0);
shellFinalize(&rc, pStmt);
shellExecPrintf(pState->db, &rc,
"PRAGMA _shared_schema_tmp.schema_version = %d", iCookie
);
sqlite3_exec(pState->db, "DETACH _shared_schema_tmp", 0, 0, 0);
return rc;
}
static int sharedSchemaCheck(ShellState *pState, const char *zDb, int *peFix){
int rc = SQLITE_OK;
int bFailed = 0;
sqlite3_stmt *pStmt = 0;
if( peFix ) *peFix = 0;
shellExecPrintf(pState->db, &rc, "ATTACH '%q' AS _shared_schema_tmp", zDb);
/* Check if this database has the same set of objects as the current db */
shellPreparePrintf(pState->db, &rc, &pStmt,
"SELECT type, name FROM _shared_schema_tmp.sqlite_master AS o "
"WHERE NOT EXISTS ("
" SELECT 1 FROM main.sqlite_master "
" WHERE name IS o.name AND type IS o.type"
")"
" UNION ALL "
"SELECT type, name FROM main.sqlite_master AS o "
"WHERE NOT EXISTS ("
" SELECT 1 FROM _shared_schema_tmp.sqlite_master "
" WHERE name IS o.name AND type IS o.type"
")"
);
if( rc==SQLITE_OK && SQLITE_ROW==sqlite3_step(pStmt) ){
utf8_printf(pState->out, "%s is NOT compatible (objects)\n", zDb);
bFailed = 1;
}
shellFinalize(&rc, pStmt);
/* Check if this database has the same set of SQL statements as the
** current db. */
if( bFailed==0 ){
shellPreparePrintf(pState->db, &rc, &pStmt,
"SELECT 1 FROM _shared_schema_tmp.sqlite_master AS o "
"WHERE sql IS NOT ("
" SELECT sql FROM main.sqlite_master "
" WHERE name IS o.name AND type IS o.type"
")"
);
if( rc==SQLITE_OK && SQLITE_ROW==sqlite3_step(pStmt) ){
utf8_printf(pState->out, "%s is NOT compatible (SQL)\n", zDb);
bFailed = 1;
}
shellFinalize(&rc, pStmt);
}
/* Check if this database has the same set of root pages as the current
** db. */
if( bFailed==0 ){
shellPreparePrintf(pState->db, &rc, &pStmt,
"SELECT 1 FROM _shared_schema_tmp.sqlite_master AS o "
"WHERE rootpage IS NOT ("
" SELECT rootpage FROM main.sqlite_master "
" WHERE name IS o.name AND type IS o.type"
")"
);
if( rc==SQLITE_OK && SQLITE_ROW==sqlite3_step(pStmt) ){
if( peFix==0 ){
utf8_printf(pState->out, "%s is NOT compatible (root pages)\n", zDb);
}
bFailed = 1;
if( peFix ) *peFix = 1;
}
shellFinalize(&rc, pStmt);
}
if( bFailed==0 ){
shellPreparePrintf(pState->db, &rc, &pStmt,
"SELECT 1 WHERE ("
" SELECT group_concat(rootpage || '.' || name || '.' || sql, '.') "
" FROM _shared_schema_tmp.sqlite_master"
") IS NOT ("
" SELECT group_concat(rootpage || '.' || name || '.' || sql, '.') "
" FROM main.sqlite_master"
")"
);
if( rc==SQLITE_OK && SQLITE_ROW==sqlite3_step(pStmt) ){
if( peFix==0 ){
utf8_printf(pState->out,
"%s is NOT compatible (order of sqlite_master rows)\n", zDb
);
}
bFailed = 1;
if( peFix ) *peFix = 2;
}
shellFinalize(&rc, pStmt);
}
if( bFailed==0 ){
int iMain = -1;
int iNew = +1;
shellPreparePrintf(pState->db, &rc, &pStmt,
"PRAGMA main.schema_version"
);
if( rc==SQLITE_OK && SQLITE_ROW==sqlite3_step(pStmt) ){
iMain = sqlite3_column_int(pStmt, 0);
}
shellFinalize(&rc, pStmt);
shellPreparePrintf(pState->db, &rc, &pStmt,
"PRAGMA _shared_schema_tmp.schema_version"
);
if( rc==SQLITE_OK && SQLITE_ROW==sqlite3_step(pStmt) ){
iNew = sqlite3_column_int(pStmt, 0);
}
shellFinalize(&rc, pStmt);
if( rc==SQLITE_OK && iMain!=iNew ){
if( peFix==0 ){
utf8_printf(pState->out,
"%s is NOT compatible (schema cookie)\n", zDb
);
}
bFailed = 1;
if( peFix ) *peFix = 3;
}
}
if( rc==SQLITE_OK && bFailed==0 ){
utf8_printf(pState->out, "%s is compatible\n", zDb);
}
sqlite3_exec(pState->db, "DETACH _shared_schema_tmp", 0, 0, 0);
return rc;
}
/*
** .shared-schema check|fix DB1 DB2...
*/
static int sharedSchemaDotCommand(
ShellState *pState, /* Current shell tool state */
char **azArg, /* Array of arguments passed to dot command */
int nArg /* Number of entries in azArg[] */
){
int rc = SQLITE_OK;
int bFix = 0; /* Fix databases if possible */
int n1;
int i;
if( nArg<3 ){
goto shared_schema_usage;
}
n1 = (int)strlen(azArg[1]);
if( n1>0 && n1<=3 && memcmp("fix", azArg[1], n1)==0 ){
bFix = 1;
}else if( n1==0 || n1>5 || memcmp("check", azArg[1], n1) ){
goto shared_schema_usage;
}
for(i=2; rc==SQLITE_OK && i<nArg; i++){
int eFix = 0;
rc = sharedSchemaCheck(pState, azArg[i], bFix ? &eFix : 0);
if( rc==SQLITE_OK && bFix && eFix ){
utf8_printf(pState->out, "Fixing %s... ", azArg[i]);
fflush(pState->out);
rc = sharedSchemaFix(pState, azArg[i], eFix);
if( rc==SQLITE_OK ){
rc = sharedSchemaCheck(pState, azArg[i], &eFix);
if( rc==SQLITE_OK && eFix ){
utf8_printf(pState->out, "VACUUMing main... ");
fflush(pState->out);
rc = sqlite3_exec(pState->db, "VACUUM main", 0, 0, 0);
if( rc==SQLITE_OK ){
rc = sharedSchemaCheck(pState, azArg[i], 0);
}
}
}
}
}
return rc;
shared_schema_usage:
raw_printf(stderr, "usage: .shared-schema check|fix DB1 DB2...\n");
return SQLITE_ERROR;
}
/*
** Execute a statement or set of statements. Print
** any result rows/columns depending on the current mode
** set via the supplied callback.
**
** This is very similar to SQLite's built-in sqlite3_exec()
................................................................................
return SQLITE_ERROR;
}
#if !defined(SQLITE_OMIT_VIRTUALTABLE) && defined(SQLITE_HAVE_ZLIB)
/*********************************************************************************
** The ".archive" or ".ar" command.
*/
/*
** Structure representing a single ".ar" command.
*/
typedef struct ArCommand ArCommand;
struct ArCommand {
u8 eCmd; /* An AR_CMD_* value */
u8 bVerbose; /* True if --verbose */
................................................................................
if( bDebug ){
utf8_printf(p->out, "%s\n", zSql);
}else{
shell_exec(p, zSql, 0);
}
sqlite3_free(zSql);
}else
if( c=='s' && strncmp(azArg[0], "shared-schema", n)==0 ){
open_db(p, 0);
sharedSchemaDotCommand(p, azArg, nArg);
}else
#ifndef SQLITE_NOHAVE_SYSTEM
if( c=='s'
&& (strncmp(azArg[0], "shell", n)==0 || strncmp(azArg[0],"system",n)==0)
){
char *zCmd;
int i, x;
|