LIBOBJ = alter.lo attach.lo auth.lo btree.lo build.lo callback.lo date.lo \
delete.lo expr.lo func.lo hash.lo insert.lo \
main.lo opcodes.lo os_unix.lo os_win.lo \
- pager.lo parse.lo pragma.lo printf.lo random.lo \
+ pager.lo parse.lo pragma.lo prepare.lo printf.lo random.lo \
select.lo table.lo tokenize.lo trigger.lo update.lo \
util.lo vacuum.lo vdbe.lo vdbeapi.lo vdbeaux.lo vdbemem.lo \
where.lo utf.lo legacy.lo
$(TOP)/src/pager.h \
$(TOP)/src/parse.y \
$(TOP)/src/pragma.c \
+ $(TOP)/src/prepare.c \
$(TOP)/src/printf.c \
$(TOP)/src/random.c \
$(TOP)/src/select.c \
pragma.lo: $(TOP)/src/pragma.c $(HDR)
$(LTCOMPILE) -c $(TOP)/src/pragma.c
+prepare.lo: $(TOP)/src/prepare.c $(HDR)
+ $(LTCOMPILE) $(TEMP_STORE) -c $(TOP)/src/prepare.c
+
printf.lo: $(TOP)/src/printf.c $(HDR)
$(LTCOMPILE) -c $(TOP)/src/printf.c
LIBOBJ+= alter.o attach.o auth.o btree.o build.o callback.o date.o delete.o \
expr.o func.o hash.o insert.o \
main.o opcodes.o os_unix.o os_win.o \
- pager.o parse.o pragma.o printf.o random.o \
+ pager.o parse.o pragma.o prepare.o printf.o random.o \
select.o table.o tclsqlite.o tokenize.o trigger.o \
update.o util.o vacuum.o \
vdbe.o vdbeapi.o vdbeaux.o vdbemem.o \
$(TOP)/src/pager.h \
$(TOP)/src/parse.y \
$(TOP)/src/pragma.c \
+ $(TOP)/src/prepare.c \
$(TOP)/src/printf.c \
$(TOP)/src/random.c \
$(TOP)/src/select.c \
pragma.o: $(TOP)/src/pragma.c $(HDR)
$(TCCX) $(TCL_FLAGS) -c $(TOP)/src/pragma.c
+prepare.o: $(TOP)/src/prepare.c $(HDR)
+ $(TCCX) $(TCL_FLAGS) -c $(TOP)/src/prepare.c
+
printf.o: $(TOP)/src/printf.c $(HDR)
$(TCCX) $(TCL_FLAGS) -c $(TOP)/src/printf.c
-C Remove\sthe\sconfig.h\sfile\sfrom\sthe\sbuild.\s\sTicket\s#1224.\s(CVS\s2480)
-D 2005-05-24T20:19:58
-F Makefile.in b2b2d69640853c3917fedd9296e9003d610d86b1
+C Split\smain.c\sinto\stwo\sfiles\sto\smake\sbuilding\swithout\sthe\sparser\seasier.\s(CVS\s2481)
+D 2005-05-25T04:11:56
+F Makefile.in 8129e7f261d405db783676f9ca31e0841768c652
F Makefile.linux-gcc 06be33b2a9ad4f005a5f42b22c4a19dab3cbb5c7
F README 9c4e2d6706bdcc3efdd773ce752a8cdab4f90028
F VERSION 44187d7938af15a89b7b2dcd0016ffe5ec84961f
F doc/report1.txt a031aaf37b185e4fa540223cb516d3bccec7eeac
F install-sh 9d4de14ab9fb0facae2f48780b874848cbf2f895
F ltmain.sh f6b283068efa69f06eb8aa1fe4bddfdbdeb35826
-F main.mk 4695aa29032a0665c2becf38a29180b38b90e178
+F main.mk 8972f361ff4d9f3e215c4a346c91424620c87fc4
F mkdll.sh 5ec23622515d5bf8969404e80cfb5e220ddf0512
F mkopcodec.awk bd46ad001c98dfbab07b1713cb8e692fa0e5415d
F mkopcodeh.awk 7563ad235670e864ead95cf672be3fe081450ae0
F src/hash.h 1b0c445e1c89ff2aaad9b4605ba61375af001e84
F src/insert.c 34c25c33f51a43644a42cc091ac967b070c6b6d5
F src/legacy.c d58ea507bce885298a2c8c3cbb0f4bff5d47830b
-F src/main.c 8de9c03d8388d2ccb3a89bdf0596f2280e21b655
+F src/main.c 8954071c07b29636c57c4cb7b445562210738e29
F src/md5.c 7ae1c39044b95de2f62e066f47bb1deb880a1070
F src/os.h e5438be25cf96858787bf9b60fc7a2420e139ee3
F src/os_common.h 0e7f428ba0a6c40a61bc56c4e96f493231301b73
F src/pager.h 0d9153d6269d60d04af3dd84a0cc0a96253cf4a4
F src/parse.y 72cd7553f05fbc7b63ea9476108d0da6237f2818
F src/pragma.c 0ed94a1aa982802a9cf2a932c48d99b60683fa53
+F src/prepare.c d53602d2f8e097225ae7c76ec764ae68f759ba47
F src/printf.c 3d20b21cfecadacecac3fb7274e746cb81d3d357
F src/random.c eff68e3f257e05e81eae6c4d50a51eb88beb4ff3
F src/select.c 43cc2a76e3e00dabc59da82d0dcdef23cdba43a3
F www/vdbe.tcl 87a31ace769f20d3627a64fa1fade7fed47b90d0
F www/version3.tcl a99cf5f6d8bd4d5537584a2b342f0fb9fa601d8b
F www/whentouse.tcl 528299b8316726dbcc5548e9aa0648c8b1bd055b
-P 5fadb464eb77b4b998d8555f83401769960ea904
-R 559b7971d270b59c0ead6f07efa2b008
-U drh
-Z c2b1f0d897d1329ca3d0de496bb83bf1
+P 3e64f1ab417f371e9875915303b898c5b45f0807
+R f1df240b45731b7db4ecb585924f1d63
+U danielk1977
+Z 9396e64a640a1eaa13d2b45263343304
-3e64f1ab417f371e9875915303b898c5b45f0807
\ No newline at end of file
+d50915fafbde6859a5c2c3fc5cc9b99553b54e21
\ No newline at end of file
** other files are for internal use by SQLite and should not be
** accessed by users of the library.
**
-** $Id: main.c,v 1.290 2005/05/24 20:19:59 drh Exp $
+** $Id: main.c,v 1.291 2005/05/25 04:11:56 danielk1977 Exp $
*/
#include "sqliteInt.h"
#include "os.h"
static sqlite3 *pDbList = 0;
#endif
-
-/*
-** Fill the InitData structure with an error message that indicates
-** that the database is corrupt.
-*/
-static void corruptSchema(InitData *pData, const char *zExtra){
- if( !sqlite3_malloc_failed ){
- sqlite3SetString(pData->pzErrMsg, "malformed database schema",
- zExtra!=0 && zExtra[0]!=0 ? " - " : (char*)0, zExtra, (char*)0);
- }
-}
-
#ifndef SQLITE_OMIT_UTF16
/*
** Return the transient sqlite3_value object used for encoding conversions
}
#endif
-/*
-** This is the callback routine for the code that initializes the
-** database. See sqlite3Init() below for additional information.
-** This routine is also called from the OP_ParseSchema opcode of the VDBE.
-**
-** Each callback contains the following information:
-**
-** argv[0] = name of thing being created
-** argv[1] = root page number for table or index. NULL for trigger or view.
-** argv[2] = SQL text for the CREATE statement.
-** argv[3] = "1" for temporary files, "0" for main database, "2" or more
-** for auxiliary database files.
-**
-*/
-int sqlite3InitCallback(void *pInit, int argc, char **argv, char **azColName){
- InitData *pData = (InitData*)pInit;
- sqlite3 *db = pData->db;
- int iDb;
-
- assert( argc==4 );
- if( argv==0 ) return 0; /* Might happen if EMPTY_RESULT_CALLBACKS are on */
- if( argv[1]==0 || argv[3]==0 ){
- corruptSchema(pData, 0);
- return 1;
- }
- iDb = atoi(argv[3]);
- assert( iDb>=0 && iDb<db->nDb );
- if( argv[2] && argv[2][0] ){
- /* Call the parser to process a CREATE TABLE, INDEX or VIEW.
- ** But because db->init.busy is set to 1, no VDBE code is generated
- ** or executed. All the parser does is build the internal data
- ** structures that describe the table, index, or view.
- */
- char *zErr;
- int rc;
- assert( db->init.busy );
- db->init.iDb = iDb;
- db->init.newTnum = atoi(argv[1]);
- rc = sqlite3_exec(db, argv[2], 0, 0, &zErr);
- db->init.iDb = 0;
- if( SQLITE_OK!=rc ){
- corruptSchema(pData, zErr);
- sqlite3_free(zErr);
- return rc;
- }
- }else{
- /* If the SQL column is blank it means this is an index that
- ** was created to be the PRIMARY KEY or to fulfill a UNIQUE
- ** constraint for a CREATE TABLE. The index should have already
- ** been created when we processed the CREATE TABLE. All we have
- ** to do here is record the root page number for that index.
- */
- Index *pIndex;
- pIndex = sqlite3FindIndex(db, argv[0], db->aDb[iDb].zName);
- if( pIndex==0 || pIndex->tnum!=0 ){
- /* This can occur if there exists an index on a TEMP table which
- ** has the same name as another index on a permanent index. Since
- ** the permanent table is hidden by the TEMP table, we can also
- ** safely ignore the index on the permanent table.
- */
- /* Do Nothing */;
- }else{
- pIndex->tnum = atoi(argv[1]);
- }
- }
- return 0;
-}
-
-/*
-** Attempt to read the database schema and initialize internal
-** data structures for a single database file. The index of the
-** database file is given by iDb. iDb==0 is used for the main
-** database. iDb==1 should never be used. iDb>=2 is used for
-** auxiliary databases. Return one of the SQLITE_ error codes to
-** indicate success or failure.
-*/
-static int sqlite3InitOne(sqlite3 *db, int iDb, char **pzErrMsg){
- int rc;
- BtCursor *curMain;
- int size;
- Table *pTab;
- char const *azArg[5];
- char zDbNum[30];
- int meta[10];
- InitData initData;
- char const *zMasterSchema;
- char const *zMasterName = SCHEMA_TABLE(iDb);
-
- /*
- ** The master database table has a structure like this
- */
- static const char master_schema[] =
- "CREATE TABLE sqlite_master(\n"
- " type text,\n"
- " name text,\n"
- " tbl_name text,\n"
- " rootpage integer,\n"
- " sql text\n"
- ")"
- ;
-#ifndef SQLITE_OMIT_TEMPDB
- static const char temp_master_schema[] =
- "CREATE TEMP TABLE sqlite_temp_master(\n"
- " type text,\n"
- " name text,\n"
- " tbl_name text,\n"
- " rootpage integer,\n"
- " sql text\n"
- ")"
- ;
-#else
- #define temp_master_schema 0
-#endif
-
- assert( iDb>=0 && iDb<db->nDb );
-
- /* zMasterSchema and zInitScript are set to point at the master schema
- ** and initialisation script appropriate for the database being
- ** initialised. zMasterName is the name of the master table.
- */
- if( !OMIT_TEMPDB && iDb==1 ){
- zMasterSchema = temp_master_schema;
- }else{
- zMasterSchema = master_schema;
- }
- zMasterName = SCHEMA_TABLE(iDb);
-
- /* Construct the schema tables. */
- sqlite3SafetyOff(db);
- azArg[0] = zMasterName;
- azArg[1] = "1";
- azArg[2] = zMasterSchema;
- sprintf(zDbNum, "%d", iDb);
- azArg[3] = zDbNum;
- azArg[4] = 0;
- initData.db = db;
- initData.pzErrMsg = pzErrMsg;
- rc = sqlite3InitCallback(&initData, 4, (char **)azArg, 0);
- if( rc!=SQLITE_OK ){
- sqlite3SafetyOn(db);
- return rc;
- }
- pTab = sqlite3FindTable(db, zMasterName, db->aDb[iDb].zName);
- if( pTab ){
- pTab->readOnly = 1;
- }
- sqlite3SafetyOn(db);
-
- /* Create a cursor to hold the database open
- */
- if( db->aDb[iDb].pBt==0 ){
- if( !OMIT_TEMPDB && iDb==1 ) DbSetProperty(db, 1, DB_SchemaLoaded);
- return SQLITE_OK;
- }
- rc = sqlite3BtreeCursor(db->aDb[iDb].pBt, MASTER_ROOT, 0, 0, 0, &curMain);
- if( rc!=SQLITE_OK && rc!=SQLITE_EMPTY ){
- sqlite3SetString(pzErrMsg, sqlite3ErrStr(rc), (char*)0);
- return rc;
- }
-
- /* Get the database meta information.
- **
- ** Meta values are as follows:
- ** meta[0] Schema cookie. Changes with each schema change.
- ** meta[1] File format of schema layer.
- ** meta[2] Size of the page cache.
- ** meta[3] Use freelist if 0. Autovacuum if greater than zero.
- ** meta[4] Db text encoding. 1:UTF-8 3:UTF-16 LE 4:UTF-16 BE
- ** meta[5] The user cookie. Used by the application.
- ** meta[6]
- ** meta[7]
- ** meta[8]
- ** meta[9]
- **
- ** Note: The hash defined SQLITE_UTF* symbols in sqliteInt.h correspond to
- ** the possible values of meta[4].
- */
- if( rc==SQLITE_OK ){
- int i;
- for(i=0; rc==SQLITE_OK && i<sizeof(meta)/sizeof(meta[0]); i++){
- rc = sqlite3BtreeGetMeta(db->aDb[iDb].pBt, i+1, (u32 *)&meta[i]);
- }
- if( rc ){
- sqlite3SetString(pzErrMsg, sqlite3ErrStr(rc), (char*)0);
- sqlite3BtreeCloseCursor(curMain);
- return rc;
- }
- }else{
- memset(meta, 0, sizeof(meta));
- }
- db->aDb[iDb].schema_cookie = meta[0];
-
- /* If opening a non-empty database, check the text encoding. For the
- ** main database, set sqlite3.enc to the encoding of the main database.
- ** For an attached db, it is an error if the encoding is not the same
- ** as sqlite3.enc.
- */
- if( meta[4] ){ /* text encoding */
- if( iDb==0 ){
- /* If opening the main database, set db->enc. */
- db->enc = (u8)meta[4];
- db->pDfltColl = sqlite3FindCollSeq(db, db->enc, "BINARY", 6, 0);
- }else{
- /* If opening an attached database, the encoding much match db->enc */
- if( meta[4]!=db->enc ){
- sqlite3BtreeCloseCursor(curMain);
- sqlite3SetString(pzErrMsg, "attached databases must use the same"
- " text encoding as main database", (char*)0);
- return SQLITE_ERROR;
- }
- }
- }
-
- size = meta[2];
- if( size==0 ){ size = MAX_PAGES; }
- db->aDb[iDb].cache_size = size;
-
- if( iDb==0 ){
- db->file_format = meta[1];
- if( db->file_format==0 ){
- /* This happens if the database was initially empty */
- db->file_format = 1;
- }
-
- if( db->file_format==2 || db->file_format==3 ){
- /* File format 2 is treated exactly as file format 1. New
- ** databases are created with file format 1.
- */
- db->file_format = 1;
- }
- }
-
- /*
- ** file_format==1 Version 3.0.0.
- ** file_format==2 Version 3.1.3.
- ** file_format==3 Version 3.1.4.
- **
- ** Version 3.0 can only use files with file_format==1. Version 3.1.3
- ** can read and write files with file_format==1 or file_format==2.
- ** Version 3.1.4 can read and write file formats 1, 2 and 3.
- */
- if( meta[1]>3 ){
- sqlite3BtreeCloseCursor(curMain);
- sqlite3SetString(pzErrMsg, "unsupported file format", (char*)0);
- return SQLITE_ERROR;
- }
-
- sqlite3BtreeSetCacheSize(db->aDb[iDb].pBt, db->aDb[iDb].cache_size);
-
- /* Read the schema information out of the schema tables
- */
- assert( db->init.busy );
- if( rc==SQLITE_EMPTY ){
- /* For an empty database, there is nothing to read */
- rc = SQLITE_OK;
- }else{
- char *zSql;
- zSql = sqlite3MPrintf(
- "SELECT name, rootpage, sql, '%s' FROM '%q'.%s",
- zDbNum, db->aDb[iDb].zName, zMasterName);
- sqlite3SafetyOff(db);
- rc = sqlite3_exec(db, zSql, sqlite3InitCallback, &initData, 0);
- sqlite3SafetyOn(db);
- sqliteFree(zSql);
- sqlite3BtreeCloseCursor(curMain);
- }
- if( sqlite3_malloc_failed ){
- sqlite3SetString(pzErrMsg, "out of memory", (char*)0);
- rc = SQLITE_NOMEM;
- sqlite3ResetInternalSchema(db, 0);
- }
- if( rc==SQLITE_OK ){
- DbSetProperty(db, iDb, DB_SchemaLoaded);
- }else{
- sqlite3ResetInternalSchema(db, iDb);
- }
- return rc;
-}
-
-/*
-** Initialize all database files - the main database file, the file
-** used to store temporary tables, and any additional database files
-** created using ATTACH statements. Return a success code. If an
-** error occurs, write an error message into *pzErrMsg.
-**
-** After the database is initialized, the SQLITE_Initialized
-** bit is set in the flags field of the sqlite structure.
-*/
-int sqlite3Init(sqlite3 *db, char **pzErrMsg){
- int i, rc;
-
- if( db->init.busy ) return SQLITE_OK;
- assert( (db->flags & SQLITE_Initialized)==0 );
- rc = SQLITE_OK;
- db->init.busy = 1;
- for(i=0; rc==SQLITE_OK && i<db->nDb; i++){
- if( DbHasProperty(db, i, DB_SchemaLoaded) || i==1 ) continue;
- rc = sqlite3InitOne(db, i, pzErrMsg);
- if( rc ){
- sqlite3ResetInternalSchema(db, i);
- }
- }
-
- /* Once all the other databases have been initialised, load the schema
- ** for the TEMP database. This is loaded last, as the TEMP database
- ** schema may contain references to objects in other databases.
- */
-#ifndef SQLITE_OMIT_TEMPDB
- if( rc==SQLITE_OK && db->nDb>1 && !DbHasProperty(db, 1, DB_SchemaLoaded) ){
- rc = sqlite3InitOne(db, 1, pzErrMsg);
- if( rc ){
- sqlite3ResetInternalSchema(db, 1);
- }
- }
-#endif
-
- db->init.busy = 0;
- if( rc==SQLITE_OK ){
- db->flags |= SQLITE_Initialized;
- sqlite3CommitInternalChanges(db);
- }
-
- if( rc!=SQLITE_OK ){
- db->flags &= ~SQLITE_Initialized;
- }
- return rc;
-}
-
-/*
-** This routine is a no-op if the database schema is already initialised.
-** Otherwise, the schema is loaded. An error code is returned.
-*/
-int sqlite3ReadSchema(Parse *pParse){
- int rc = SQLITE_OK;
- sqlite3 *db = pParse->db;
- if( !db->init.busy ){
- if( (db->flags & SQLITE_Initialized)==0 ){
- rc = sqlite3Init(db, &pParse->zErrMsg);
- }
- }
- assert( rc!=SQLITE_OK || (db->flags & SQLITE_Initialized)||db->init.busy );
- if( rc!=SQLITE_OK ){
- pParse->rc = rc;
- pParse->nErr++;
- }
- return rc;
-}
-
/*
** The version of the library
*/
return db->errCode;
}
-/*
-** Check schema cookies in all databases. If any cookie is out
-** of date, return 0. If all schema cookies are current, return 1.
-*/
-static int schemaIsValid(sqlite3 *db){
- int iDb;
- int rc;
- BtCursor *curTemp;
- int cookie;
- int allOk = 1;
-
- for(iDb=0; allOk && iDb<db->nDb; iDb++){
- Btree *pBt;
- pBt = db->aDb[iDb].pBt;
- if( pBt==0 ) continue;
- rc = sqlite3BtreeCursor(pBt, MASTER_ROOT, 0, 0, 0, &curTemp);
- if( rc==SQLITE_OK ){
- rc = sqlite3BtreeGetMeta(pBt, 1, (u32 *)&cookie);
- if( rc==SQLITE_OK && cookie!=db->aDb[iDb].schema_cookie ){
- allOk = 0;
- }
- sqlite3BtreeCloseCursor(curTemp);
- }
- }
- return allOk;
-}
-
-/*
-** Compile the UTF-8 encoded SQL statement zSql into a statement handle.
-*/
-int sqlite3_prepare(
- sqlite3 *db, /* Database handle. */
- const char *zSql, /* UTF-8 encoded SQL statement. */
- int nBytes, /* Length of zSql in bytes. */
- sqlite3_stmt **ppStmt, /* OUT: A pointer to the prepared statement */
- const char** pzTail /* OUT: End of parsed string */
-){
- Parse sParse;
- char *zErrMsg = 0;
- int rc = SQLITE_OK;
-
- if( sqlite3_malloc_failed ){
- return SQLITE_NOMEM;
- }
-
- assert( ppStmt );
- *ppStmt = 0;
- if( sqlite3SafetyOn(db) ){
- return SQLITE_MISUSE;
- }
-
- memset(&sParse, 0, sizeof(sParse));
- sParse.db = db;
- sqlite3RunParser(&sParse, zSql, &zErrMsg);
-
- if( sqlite3_malloc_failed ){
- rc = SQLITE_NOMEM;
- sqlite3RollbackAll(db);
- sqlite3ResetInternalSchema(db, 0);
- db->flags &= ~SQLITE_InTrans;
- goto prepare_out;
- }
- if( sParse.rc==SQLITE_DONE ) sParse.rc = SQLITE_OK;
- if( sParse.rc!=SQLITE_OK && sParse.checkSchema && !schemaIsValid(db) ){
- sParse.rc = SQLITE_SCHEMA;
- }
- if( sParse.rc==SQLITE_SCHEMA ){
- sqlite3ResetInternalSchema(db, 0);
- }
- if( pzTail ) *pzTail = sParse.zTail;
- rc = sParse.rc;
-
-#ifndef SQLITE_OMIT_EXPLAIN
- if( rc==SQLITE_OK && sParse.pVdbe && sParse.explain ){
- sqlite3VdbeSetNumCols(sParse.pVdbe, 5);
- sqlite3VdbeSetColName(sParse.pVdbe, 0, "addr", P3_STATIC);
- sqlite3VdbeSetColName(sParse.pVdbe, 1, "opcode", P3_STATIC);
- sqlite3VdbeSetColName(sParse.pVdbe, 2, "p1", P3_STATIC);
- sqlite3VdbeSetColName(sParse.pVdbe, 3, "p2", P3_STATIC);
- sqlite3VdbeSetColName(sParse.pVdbe, 4, "p3", P3_STATIC);
- }
-#endif
-
-prepare_out:
- if( sqlite3SafetyOff(db) ){
- rc = SQLITE_MISUSE;
- }
- if( rc==SQLITE_OK ){
- *ppStmt = (sqlite3_stmt*)sParse.pVdbe;
- }else if( sParse.pVdbe ){
- sqlite3_finalize((sqlite3_stmt*)sParse.pVdbe);
- }
-
- if( zErrMsg ){
- sqlite3Error(db, rc, "%s", zErrMsg);
- sqliteFree(zErrMsg);
- }else{
- sqlite3Error(db, rc, 0);
- }
- return rc;
-}
-
-#ifndef SQLITE_OMIT_UTF16
-/*
-** Compile the UTF-16 encoded SQL statement zSql into a statement handle.
-*/
-int sqlite3_prepare16(
- sqlite3 *db, /* Database handle. */
- const void *zSql, /* UTF-8 encoded SQL statement. */
- int nBytes, /* Length of zSql in bytes. */
- sqlite3_stmt **ppStmt, /* OUT: A pointer to the prepared statement */
- const void **pzTail /* OUT: End of parsed string */
-){
- /* This function currently works by first transforming the UTF-16
- ** encoded string to UTF-8, then invoking sqlite3_prepare(). The
- ** tricky bit is figuring out the pointer to return in *pzTail.
- */
- char const *zSql8 = 0;
- char const *zTail8 = 0;
- int rc;
- sqlite3_value *pTmp;
-
- if( sqlite3SafetyCheck(db) ){
- return SQLITE_MISUSE;
- }
- pTmp = sqlite3GetTransientValue(db);
- sqlite3ValueSetStr(pTmp, -1, zSql, SQLITE_UTF16NATIVE, SQLITE_STATIC);
- zSql8 = sqlite3ValueText(pTmp, SQLITE_UTF8);
- if( !zSql8 ){
- sqlite3Error(db, SQLITE_NOMEM, 0);
- return SQLITE_NOMEM;
- }
- rc = sqlite3_prepare(db, zSql8, -1, ppStmt, &zTail8);
-
- if( zTail8 && pzTail ){
- /* If sqlite3_prepare returns a tail pointer, we calculate the
- ** equivalent pointer into the UTF-16 string by counting the unicode
- ** characters between zSql8 and zTail8, and then returning a pointer
- ** the same number of characters into the UTF-16 string.
- */
- int chars_parsed = sqlite3utf8CharLen(zSql8, zTail8-zSql8);
- *pzTail = (u8 *)zSql + sqlite3utf16ByteLen(zSql, chars_parsed);
- }
-
- return rc;
-}
-#endif /* SQLITE_OMIT_UTF16 */
-
/*
** This routine does the work of opening a database on behalf of
** sqlite3_open() and sqlite3_open16(). The database filename "zFilename"
--- /dev/null
+/*
+** 2005 May 25
+**
+** The author disclaims copyright to this source code. In place of
+** a legal notice, here is a blessing:
+**
+** May you do good and not evil.
+** May you find forgiveness for yourself and forgive others.
+** May you share freely, never taking more than you give.
+**
+*************************************************************************
+** This file contains the implementation of the sqlite3_prepare()
+** interface, and routines that contribute to loading the database schema
+** from disk.
+**
+** $Id: prepare.c,v 1.1 2005/05/25 04:11:56 danielk1977 Exp $
+*/
+#include "sqliteInt.h"
+#include "os.h"
+#include <ctype.h>
+
+/*
+** Fill the InitData structure with an error message that indicates
+** that the database is corrupt.
+*/
+static void corruptSchema(InitData *pData, const char *zExtra){
+ if( !sqlite3_malloc_failed ){
+ sqlite3SetString(pData->pzErrMsg, "malformed database schema",
+ zExtra!=0 && zExtra[0]!=0 ? " - " : (char*)0, zExtra, (char*)0);
+ }
+}
+
+/*
+** This is the callback routine for the code that initializes the
+** database. See sqlite3Init() below for additional information.
+** This routine is also called from the OP_ParseSchema opcode of the VDBE.
+**
+** Each callback contains the following information:
+**
+** argv[0] = name of thing being created
+** argv[1] = root page number for table or index. NULL for trigger or view.
+** argv[2] = SQL text for the CREATE statement.
+** argv[3] = "1" for temporary files, "0" for main database, "2" or more
+** for auxiliary database files.
+**
+*/
+int sqlite3InitCallback(void *pInit, int argc, char **argv, char **azColName){
+ InitData *pData = (InitData*)pInit;
+ sqlite3 *db = pData->db;
+ int iDb;
+
+ assert( argc==4 );
+ if( argv==0 ) return 0; /* Might happen if EMPTY_RESULT_CALLBACKS are on */
+ if( argv[1]==0 || argv[3]==0 ){
+ corruptSchema(pData, 0);
+ return 1;
+ }
+ iDb = atoi(argv[3]);
+ assert( iDb>=0 && iDb<db->nDb );
+ if( argv[2] && argv[2][0] ){
+ /* Call the parser to process a CREATE TABLE, INDEX or VIEW.
+ ** But because db->init.busy is set to 1, no VDBE code is generated
+ ** or executed. All the parser does is build the internal data
+ ** structures that describe the table, index, or view.
+ */
+ char *zErr;
+ int rc;
+ assert( db->init.busy );
+ db->init.iDb = iDb;
+ db->init.newTnum = atoi(argv[1]);
+ rc = sqlite3_exec(db, argv[2], 0, 0, &zErr);
+ db->init.iDb = 0;
+ if( SQLITE_OK!=rc ){
+ corruptSchema(pData, zErr);
+ sqlite3_free(zErr);
+ return rc;
+ }
+ }else{
+ /* If the SQL column is blank it means this is an index that
+ ** was created to be the PRIMARY KEY or to fulfill a UNIQUE
+ ** constraint for a CREATE TABLE. The index should have already
+ ** been created when we processed the CREATE TABLE. All we have
+ ** to do here is record the root page number for that index.
+ */
+ Index *pIndex;
+ pIndex = sqlite3FindIndex(db, argv[0], db->aDb[iDb].zName);
+ if( pIndex==0 || pIndex->tnum!=0 ){
+ /* This can occur if there exists an index on a TEMP table which
+ ** has the same name as another index on a permanent index. Since
+ ** the permanent table is hidden by the TEMP table, we can also
+ ** safely ignore the index on the permanent table.
+ */
+ /* Do Nothing */;
+ }else{
+ pIndex->tnum = atoi(argv[1]);
+ }
+ }
+ return 0;
+}
+
+/*
+** Attempt to read the database schema and initialize internal
+** data structures for a single database file. The index of the
+** database file is given by iDb. iDb==0 is used for the main
+** database. iDb==1 should never be used. iDb>=2 is used for
+** auxiliary databases. Return one of the SQLITE_ error codes to
+** indicate success or failure.
+*/
+static int sqlite3InitOne(sqlite3 *db, int iDb, char **pzErrMsg){
+ int rc;
+ BtCursor *curMain;
+ int size;
+ Table *pTab;
+ char const *azArg[5];
+ char zDbNum[30];
+ int meta[10];
+ InitData initData;
+ char const *zMasterSchema;
+ char const *zMasterName = SCHEMA_TABLE(iDb);
+
+ /*
+ ** The master database table has a structure like this
+ */
+ static const char master_schema[] =
+ "CREATE TABLE sqlite_master(\n"
+ " type text,\n"
+ " name text,\n"
+ " tbl_name text,\n"
+ " rootpage integer,\n"
+ " sql text\n"
+ ")"
+ ;
+#ifndef SQLITE_OMIT_TEMPDB
+ static const char temp_master_schema[] =
+ "CREATE TEMP TABLE sqlite_temp_master(\n"
+ " type text,\n"
+ " name text,\n"
+ " tbl_name text,\n"
+ " rootpage integer,\n"
+ " sql text\n"
+ ")"
+ ;
+#else
+ #define temp_master_schema 0
+#endif
+
+ assert( iDb>=0 && iDb<db->nDb );
+
+ /* zMasterSchema and zInitScript are set to point at the master schema
+ ** and initialisation script appropriate for the database being
+ ** initialised. zMasterName is the name of the master table.
+ */
+ if( !OMIT_TEMPDB && iDb==1 ){
+ zMasterSchema = temp_master_schema;
+ }else{
+ zMasterSchema = master_schema;
+ }
+ zMasterName = SCHEMA_TABLE(iDb);
+
+ /* Construct the schema tables. */
+ sqlite3SafetyOff(db);
+ azArg[0] = zMasterName;
+ azArg[1] = "1";
+ azArg[2] = zMasterSchema;
+ sprintf(zDbNum, "%d", iDb);
+ azArg[3] = zDbNum;
+ azArg[4] = 0;
+ initData.db = db;
+ initData.pzErrMsg = pzErrMsg;
+ rc = sqlite3InitCallback(&initData, 4, (char **)azArg, 0);
+ if( rc!=SQLITE_OK ){
+ sqlite3SafetyOn(db);
+ return rc;
+ }
+ pTab = sqlite3FindTable(db, zMasterName, db->aDb[iDb].zName);
+ if( pTab ){
+ pTab->readOnly = 1;
+ }
+ sqlite3SafetyOn(db);
+
+ /* Create a cursor to hold the database open
+ */
+ if( db->aDb[iDb].pBt==0 ){
+ if( !OMIT_TEMPDB && iDb==1 ) DbSetProperty(db, 1, DB_SchemaLoaded);
+ return SQLITE_OK;
+ }
+ rc = sqlite3BtreeCursor(db->aDb[iDb].pBt, MASTER_ROOT, 0, 0, 0, &curMain);
+ if( rc!=SQLITE_OK && rc!=SQLITE_EMPTY ){
+ sqlite3SetString(pzErrMsg, sqlite3ErrStr(rc), (char*)0);
+ return rc;
+ }
+
+ /* Get the database meta information.
+ **
+ ** Meta values are as follows:
+ ** meta[0] Schema cookie. Changes with each schema change.
+ ** meta[1] File format of schema layer.
+ ** meta[2] Size of the page cache.
+ ** meta[3] Use freelist if 0. Autovacuum if greater than zero.
+ ** meta[4] Db text encoding. 1:UTF-8 3:UTF-16 LE 4:UTF-16 BE
+ ** meta[5] The user cookie. Used by the application.
+ ** meta[6]
+ ** meta[7]
+ ** meta[8]
+ ** meta[9]
+ **
+ ** Note: The hash defined SQLITE_UTF* symbols in sqliteInt.h correspond to
+ ** the possible values of meta[4].
+ */
+ if( rc==SQLITE_OK ){
+ int i;
+ for(i=0; rc==SQLITE_OK && i<sizeof(meta)/sizeof(meta[0]); i++){
+ rc = sqlite3BtreeGetMeta(db->aDb[iDb].pBt, i+1, (u32 *)&meta[i]);
+ }
+ if( rc ){
+ sqlite3SetString(pzErrMsg, sqlite3ErrStr(rc), (char*)0);
+ sqlite3BtreeCloseCursor(curMain);
+ return rc;
+ }
+ }else{
+ memset(meta, 0, sizeof(meta));
+ }
+ db->aDb[iDb].schema_cookie = meta[0];
+
+ /* If opening a non-empty database, check the text encoding. For the
+ ** main database, set sqlite3.enc to the encoding of the main database.
+ ** For an attached db, it is an error if the encoding is not the same
+ ** as sqlite3.enc.
+ */
+ if( meta[4] ){ /* text encoding */
+ if( iDb==0 ){
+ /* If opening the main database, set db->enc. */
+ db->enc = (u8)meta[4];
+ db->pDfltColl = sqlite3FindCollSeq(db, db->enc, "BINARY", 6, 0);
+ }else{
+ /* If opening an attached database, the encoding much match db->enc */
+ if( meta[4]!=db->enc ){
+ sqlite3BtreeCloseCursor(curMain);
+ sqlite3SetString(pzErrMsg, "attached databases must use the same"
+ " text encoding as main database", (char*)0);
+ return SQLITE_ERROR;
+ }
+ }
+ }
+
+ size = meta[2];
+ if( size==0 ){ size = MAX_PAGES; }
+ db->aDb[iDb].cache_size = size;
+
+ if( iDb==0 ){
+ db->file_format = meta[1];
+ if( db->file_format==0 ){
+ /* This happens if the database was initially empty */
+ db->file_format = 1;
+ }
+
+ if( db->file_format==2 || db->file_format==3 ){
+ /* File format 2 is treated exactly as file format 1. New
+ ** databases are created with file format 1.
+ */
+ db->file_format = 1;
+ }
+ }
+
+ /*
+ ** file_format==1 Version 3.0.0.
+ ** file_format==2 Version 3.1.3.
+ ** file_format==3 Version 3.1.4.
+ **
+ ** Version 3.0 can only use files with file_format==1. Version 3.1.3
+ ** can read and write files with file_format==1 or file_format==2.
+ ** Version 3.1.4 can read and write file formats 1, 2 and 3.
+ */
+ if( meta[1]>3 ){
+ sqlite3BtreeCloseCursor(curMain);
+ sqlite3SetString(pzErrMsg, "unsupported file format", (char*)0);
+ return SQLITE_ERROR;
+ }
+
+ sqlite3BtreeSetCacheSize(db->aDb[iDb].pBt, db->aDb[iDb].cache_size);
+
+ /* Read the schema information out of the schema tables
+ */
+ assert( db->init.busy );
+ if( rc==SQLITE_EMPTY ){
+ /* For an empty database, there is nothing to read */
+ rc = SQLITE_OK;
+ }else{
+ char *zSql;
+ zSql = sqlite3MPrintf(
+ "SELECT name, rootpage, sql, '%s' FROM '%q'.%s",
+ zDbNum, db->aDb[iDb].zName, zMasterName);
+ sqlite3SafetyOff(db);
+ rc = sqlite3_exec(db, zSql, sqlite3InitCallback, &initData, 0);
+ sqlite3SafetyOn(db);
+ sqliteFree(zSql);
+ sqlite3BtreeCloseCursor(curMain);
+ }
+ if( sqlite3_malloc_failed ){
+ sqlite3SetString(pzErrMsg, "out of memory", (char*)0);
+ rc = SQLITE_NOMEM;
+ sqlite3ResetInternalSchema(db, 0);
+ }
+ if( rc==SQLITE_OK ){
+ DbSetProperty(db, iDb, DB_SchemaLoaded);
+ }else{
+ sqlite3ResetInternalSchema(db, iDb);
+ }
+ return rc;
+}
+
+/*
+** Initialize all database files - the main database file, the file
+** used to store temporary tables, and any additional database files
+** created using ATTACH statements. Return a success code. If an
+** error occurs, write an error message into *pzErrMsg.
+**
+** After the database is initialized, the SQLITE_Initialized
+** bit is set in the flags field of the sqlite structure.
+*/
+int sqlite3Init(sqlite3 *db, char **pzErrMsg){
+ int i, rc;
+
+ if( db->init.busy ) return SQLITE_OK;
+ assert( (db->flags & SQLITE_Initialized)==0 );
+ rc = SQLITE_OK;
+ db->init.busy = 1;
+ for(i=0; rc==SQLITE_OK && i<db->nDb; i++){
+ if( DbHasProperty(db, i, DB_SchemaLoaded) || i==1 ) continue;
+ rc = sqlite3InitOne(db, i, pzErrMsg);
+ if( rc ){
+ sqlite3ResetInternalSchema(db, i);
+ }
+ }
+
+ /* Once all the other databases have been initialised, load the schema
+ ** for the TEMP database. This is loaded last, as the TEMP database
+ ** schema may contain references to objects in other databases.
+ */
+#ifndef SQLITE_OMIT_TEMPDB
+ if( rc==SQLITE_OK && db->nDb>1 && !DbHasProperty(db, 1, DB_SchemaLoaded) ){
+ rc = sqlite3InitOne(db, 1, pzErrMsg);
+ if( rc ){
+ sqlite3ResetInternalSchema(db, 1);
+ }
+ }
+#endif
+
+ db->init.busy = 0;
+ if( rc==SQLITE_OK ){
+ db->flags |= SQLITE_Initialized;
+ sqlite3CommitInternalChanges(db);
+ }
+
+ if( rc!=SQLITE_OK ){
+ db->flags &= ~SQLITE_Initialized;
+ }
+ return rc;
+}
+
+/*
+** This routine is a no-op if the database schema is already initialised.
+** Otherwise, the schema is loaded. An error code is returned.
+*/
+int sqlite3ReadSchema(Parse *pParse){
+ int rc = SQLITE_OK;
+ sqlite3 *db = pParse->db;
+ if( !db->init.busy ){
+ if( (db->flags & SQLITE_Initialized)==0 ){
+ rc = sqlite3Init(db, &pParse->zErrMsg);
+ }
+ }
+ assert( rc!=SQLITE_OK || (db->flags & SQLITE_Initialized)||db->init.busy );
+ if( rc!=SQLITE_OK ){
+ pParse->rc = rc;
+ pParse->nErr++;
+ }
+ return rc;
+}
+
+
+/*
+** Check schema cookies in all databases. If any cookie is out
+** of date, return 0. If all schema cookies are current, return 1.
+*/
+static int schemaIsValid(sqlite3 *db){
+ int iDb;
+ int rc;
+ BtCursor *curTemp;
+ int cookie;
+ int allOk = 1;
+
+ for(iDb=0; allOk && iDb<db->nDb; iDb++){
+ Btree *pBt;
+ pBt = db->aDb[iDb].pBt;
+ if( pBt==0 ) continue;
+ rc = sqlite3BtreeCursor(pBt, MASTER_ROOT, 0, 0, 0, &curTemp);
+ if( rc==SQLITE_OK ){
+ rc = sqlite3BtreeGetMeta(pBt, 1, (u32 *)&cookie);
+ if( rc==SQLITE_OK && cookie!=db->aDb[iDb].schema_cookie ){
+ allOk = 0;
+ }
+ sqlite3BtreeCloseCursor(curTemp);
+ }
+ }
+ return allOk;
+}
+
+/*
+** Compile the UTF-8 encoded SQL statement zSql into a statement handle.
+*/
+int sqlite3_prepare(
+ sqlite3 *db, /* Database handle. */
+ const char *zSql, /* UTF-8 encoded SQL statement. */
+ int nBytes, /* Length of zSql in bytes. */
+ sqlite3_stmt **ppStmt, /* OUT: A pointer to the prepared statement */
+ const char** pzTail /* OUT: End of parsed string */
+){
+ Parse sParse;
+ char *zErrMsg = 0;
+ int rc = SQLITE_OK;
+
+ if( sqlite3_malloc_failed ){
+ return SQLITE_NOMEM;
+ }
+
+ assert( ppStmt );
+ *ppStmt = 0;
+ if( sqlite3SafetyOn(db) ){
+ return SQLITE_MISUSE;
+ }
+
+ memset(&sParse, 0, sizeof(sParse));
+ sParse.db = db;
+ sqlite3RunParser(&sParse, zSql, &zErrMsg);
+
+ if( sqlite3_malloc_failed ){
+ rc = SQLITE_NOMEM;
+ sqlite3RollbackAll(db);
+ sqlite3ResetInternalSchema(db, 0);
+ db->flags &= ~SQLITE_InTrans;
+ goto prepare_out;
+ }
+ if( sParse.rc==SQLITE_DONE ) sParse.rc = SQLITE_OK;
+ if( sParse.rc!=SQLITE_OK && sParse.checkSchema && !schemaIsValid(db) ){
+ sParse.rc = SQLITE_SCHEMA;
+ }
+ if( sParse.rc==SQLITE_SCHEMA ){
+ sqlite3ResetInternalSchema(db, 0);
+ }
+ if( pzTail ) *pzTail = sParse.zTail;
+ rc = sParse.rc;
+
+#ifndef SQLITE_OMIT_EXPLAIN
+ if( rc==SQLITE_OK && sParse.pVdbe && sParse.explain ){
+ sqlite3VdbeSetNumCols(sParse.pVdbe, 5);
+ sqlite3VdbeSetColName(sParse.pVdbe, 0, "addr", P3_STATIC);
+ sqlite3VdbeSetColName(sParse.pVdbe, 1, "opcode", P3_STATIC);
+ sqlite3VdbeSetColName(sParse.pVdbe, 2, "p1", P3_STATIC);
+ sqlite3VdbeSetColName(sParse.pVdbe, 3, "p2", P3_STATIC);
+ sqlite3VdbeSetColName(sParse.pVdbe, 4, "p3", P3_STATIC);
+ }
+#endif
+
+prepare_out:
+ if( sqlite3SafetyOff(db) ){
+ rc = SQLITE_MISUSE;
+ }
+ if( rc==SQLITE_OK ){
+ *ppStmt = (sqlite3_stmt*)sParse.pVdbe;
+ }else if( sParse.pVdbe ){
+ sqlite3_finalize((sqlite3_stmt*)sParse.pVdbe);
+ }
+
+ if( zErrMsg ){
+ sqlite3Error(db, rc, "%s", zErrMsg);
+ sqliteFree(zErrMsg);
+ }else{
+ sqlite3Error(db, rc, 0);
+ }
+ return rc;
+}
+
+#ifndef SQLITE_OMIT_UTF16
+/*
+** Compile the UTF-16 encoded SQL statement zSql into a statement handle.
+*/
+int sqlite3_prepare16(
+ sqlite3 *db, /* Database handle. */
+ const void *zSql, /* UTF-8 encoded SQL statement. */
+ int nBytes, /* Length of zSql in bytes. */
+ sqlite3_stmt **ppStmt, /* OUT: A pointer to the prepared statement */
+ const void **pzTail /* OUT: End of parsed string */
+){
+ /* This function currently works by first transforming the UTF-16
+ ** encoded string to UTF-8, then invoking sqlite3_prepare(). The
+ ** tricky bit is figuring out the pointer to return in *pzTail.
+ */
+ char const *zSql8 = 0;
+ char const *zTail8 = 0;
+ int rc;
+ sqlite3_value *pTmp;
+
+ if( sqlite3SafetyCheck(db) ){
+ return SQLITE_MISUSE;
+ }
+ pTmp = sqlite3GetTransientValue(db);
+ sqlite3ValueSetStr(pTmp, -1, zSql, SQLITE_UTF16NATIVE, SQLITE_STATIC);
+ zSql8 = sqlite3ValueText(pTmp, SQLITE_UTF8);
+ if( !zSql8 ){
+ sqlite3Error(db, SQLITE_NOMEM, 0);
+ return SQLITE_NOMEM;
+ }
+ rc = sqlite3_prepare(db, zSql8, -1, ppStmt, &zTail8);
+
+ if( zTail8 && pzTail ){
+ /* If sqlite3_prepare returns a tail pointer, we calculate the
+ ** equivalent pointer into the UTF-16 string by counting the unicode
+ ** characters between zSql8 and zTail8, and then returning a pointer
+ ** the same number of characters into the UTF-16 string.
+ */
+ int chars_parsed = sqlite3utf8CharLen(zSql8, zTail8-zSql8);
+ *pzTail = (u8 *)zSql + sqlite3utf16ByteLen(zSql, chars_parsed);
+ }
+
+ return rc;
+}
+#endif /* SQLITE_OMIT_UTF16 */
+
projects / thirdparty / sqlite.git / commitdiff
