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mattercontrol/original/Community.CsharpSqlite/src/prepare_c.cs

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using System;
using System.Diagnostics;
using System.Text;
using sqlite3_int64 = System.Int64;
using u32 = System.UInt32;
using u8 = System.Byte;
namespace Community.CsharpSqlite
{
using sqlite3_stmt = Sqlite3.Vdbe;
public partial class Sqlite3
{
/*
** 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.
*************************************************************************
** Included in SQLite3 port to C#-SQLite; 2008 Noah B Hart
** C#-SQLite is an independent reimplementation of the SQLite software library
**
** SQLITE_SOURCE_ID: 2011-05-19 13:26:54 ed1da510a239ea767a01dc332b667119fa3c908e
**
*************************************************************************
*/
//#include "sqliteInt.h"
/*
** Fill the InitData structure with an error message that indicates
** that the database is corrupt.
*/
private static void corruptSchema(
InitData pData, /* Initialization context */
string zObj, /* Object being parsed at the point of error */
string zExtra /* Error information */
)
{
sqlite3 db = pData.db;
if ( /* 0 == db.mallocFailed && */ (db.flags & SQLITE_RecoveryMode) == 0)
{
{
if (zObj == null)
{
zObj = "?";
#if SQLITE_OMIT_UTF16
if (ENC(db) != SQLITE_UTF8)
zObj = encnames[(ENC(db))].zName;
#endif
}
sqlite3SetString(ref pData.pzErrMsg, db,
"malformed database schema (%s)", zObj);
if (!String.IsNullOrEmpty(zExtra))
{
pData.pzErrMsg = sqlite3MAppendf(db, pData.pzErrMsg
, "%s - %s", pData.pzErrMsg, zExtra);
}
}
pData.rc = //db.mallocFailed != 0 ? SQLITE_NOMEM :
SQLITE_CORRUPT_BKPT();
}
}
/*
** 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. 0 for trigger or view.
** argv[2] = SQL text for the CREATE statement.
**
*/
private static int sqlite3InitCallback(object pInit, sqlite3_int64 argc, object p2, object NotUsed)
{
string[] argv = (string[])p2;
InitData pData = (InitData)pInit;
sqlite3 db = pData.db;
int iDb = pData.iDb;
Debug.Assert(argc == 3);
UNUSED_PARAMETER2(NotUsed, argc);
Debug.Assert(sqlite3_mutex_held(db.mutex));
DbClearProperty(db, iDb, DB_Empty);
//if ( db.mallocFailed != 0 )
//{
// corruptSchema( pData, argv[0], "" );
// return 1;
//}
Debug.Assert(iDb >= 0 && iDb < db.nDb);
if (argv == null)
return 0; /* Might happen if EMPTY_RESULT_CALLBACKS are on */
if (argv[1] == null)
{
corruptSchema(pData, argv[0], "");
}
else if (!String.IsNullOrEmpty(argv[2]))
{
/* 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.
*/
int rc;
sqlite3_stmt pStmt = null;
#if !NDEBUG || SQLITE_COVERAGE_TEST
//TESTONLY(int rcp); /* Return code from sqlite3_prepare() */
int rcp;
#endif
Debug.Assert(db.init.busy != 0);
db.init.iDb = iDb;
db.init.newTnum = sqlite3Atoi(argv[1]);
db.init.orphanTrigger = 0;
//TESTONLY(rcp = ) sqlite3_prepare(db, argv[2], -1, &pStmt, 0);
#if !NDEBUG || SQLITE_COVERAGE_TEST
rcp = sqlite3_prepare(db, argv[2], -1, ref pStmt, 0);
#else
sqlite3_prepare(db, argv[2], -1, ref pStmt, 0);
#endif
rc = db.errCode;
#if !NDEBUG || SQLITE_COVERAGE_TEST
Debug.Assert((rc & 0xFF) == (rcp & 0xFF));
#endif
db.init.iDb = 0;
if (SQLITE_OK != rc)
{
if (db.init.orphanTrigger != 0)
{
Debug.Assert(iDb == 1);
}
else
{
pData.rc = rc;
//if ( rc == SQLITE_NOMEM )
//{
// // db.mallocFailed = 1;
//}
//else
if (rc != SQLITE_INTERRUPT && (rc & 0xFF) != SQLITE_LOCKED)
{
corruptSchema(pData, argv[0], sqlite3_errmsg(db));
}
}
}
sqlite3_finalize(pStmt);
}
else if (argv[0] == null || argv[0] == "")
{
corruptSchema(pData, null, null);
}
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 == null)
{
/* 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 if (sqlite3GetInt32(argv[1], ref pIndex.tnum) == false)
{
corruptSchema(pData, argv[0], "invalid rootpage");
}
}
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.
*/
private static int sqlite3InitOne(sqlite3 db, int iDb, ref string pzErrMsg)
{
int rc;
int i;
int size;
Table pTab;
Db pDb;
string[] azArg = new string[4];
u32[] meta = new u32[5];
InitData initData = new InitData();
string zMasterSchema;
string zMasterName;
int openedTransaction = 0;
/*
** The master database table has a structure like this
*/
string master_schema =
"CREATE TABLE sqlite_master(\n" +
" type text,\n" +
" name text,\n" +
" tbl_name text,\n" +
" rootpage integer,\n" +
" sql text\n" +
")"
;
#if !SQLITE_OMIT_TEMPDB
string 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
Debug.Assert(iDb >= 0 && iDb < db.nDb);
Debug.Assert(db.aDb[iDb].pSchema != null);
Debug.Assert(sqlite3_mutex_held(db.mutex));
Debug.Assert(iDb == 1 || sqlite3BtreeHoldsMutex(db.aDb[iDb].pBt));
/* 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 == 0 && iDb == 1)
{
zMasterSchema = temp_master_schema;
}
else
{
zMasterSchema = master_schema;
}
zMasterName = SCHEMA_TABLE(iDb);
/* Construct the schema tables. */
azArg[0] = zMasterName;
azArg[1] = "1";
azArg[2] = zMasterSchema;
azArg[3] = "";
initData.db = db;
initData.iDb = iDb;
initData.rc = SQLITE_OK;
initData.pzErrMsg = pzErrMsg;
sqlite3InitCallback(initData, 3, azArg, null);
if (initData.rc != 0)
{
rc = initData.rc;
goto error_out;
}
pTab = sqlite3FindTable(db, zMasterName, db.aDb[iDb].zName);
if (ALWAYS(pTab))
{
pTab.tabFlags |= TF_Readonly;
}
/* Create a cursor to hold the database open
*/
pDb = db.aDb[iDb];
if (pDb.pBt == null)
{
if (OMIT_TEMPDB == 0 && ALWAYS(iDb == 1))
{
DbSetProperty(db, 1, DB_SchemaLoaded);
}
return SQLITE_OK;
}
/* If there is not already a read-only (or read-write) transaction opened
** on the b-tree database, open one now. If a transaction is opened, it
** will be closed before this function returns. */
sqlite3BtreeEnter(pDb.pBt);
if (!sqlite3BtreeIsInReadTrans(pDb.pBt))
{
rc = sqlite3BtreeBeginTrans(pDb.pBt, 0);
if (rc != SQLITE_OK)
{
#if SQLITE_OMIT_WAL
if (pDb.pBt.pBt.pSchema.file_format == 2)
sqlite3SetString(ref pzErrMsg, db, "%s (wal format detected)", sqlite3ErrStr(rc));
else
sqlite3SetString(ref pzErrMsg, db, "%s", sqlite3ErrStr(rc));
#else
sqlite3SetString( ref pzErrMsg, db, "%s", sqlite3ErrStr( rc ) );
#endif
goto initone_error_out;
}
openedTransaction = 1;
}
/* 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] Largest rootpage (auto/incr_vacuum mode)
** meta[4] Db text encoding. 1:UTF-8 2:UTF-16LE 3:UTF-16BE
** meta[5] User version
** meta[6] Incremental vacuum mode
** meta[7] unused
** meta[8] unused
** meta[9] unused
**
** Note: The #defined SQLITE_UTF* symbols in sqliteInt.h correspond to
** the possible values of meta[BTREE_TEXT_ENCODING-1].
*/
for (i = 0; i < ArraySize(meta); i++)
{
sqlite3BtreeGetMeta(pDb.pBt, i + 1, ref meta[i]);
}
pDb.pSchema.schema_cookie = (int)meta[BTREE_SCHEMA_VERSION - 1];
/* 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[BTREE_TEXT_ENCODING - 1] != 0)
{ /* text encoding */
if (iDb == 0)
{
u8 encoding;
/* If opening the main database, set ENC(db). */
encoding = (u8)(meta[BTREE_TEXT_ENCODING - 1] & 3);
if (encoding == 0)
encoding = SQLITE_UTF8;
db.aDb[0].pSchema.enc = encoding; //ENC( db ) = encoding;
db.pDfltColl = sqlite3FindCollSeq(db, SQLITE_UTF8, "BINARY", 0);
}
else
{
/* If opening an attached database, the encoding much match ENC(db) */
if (meta[BTREE_TEXT_ENCODING - 1] != ENC(db))
{
sqlite3SetString(ref pzErrMsg, db, "attached databases must use the same" +
" text encoding as main database");
rc = SQLITE_ERROR;
goto initone_error_out;
}
}
}
else
{
DbSetProperty(db, iDb, DB_Empty);
}
pDb.pSchema.enc = ENC(db);
if (pDb.pSchema.cache_size == 0)
{
size = sqlite3AbsInt32((int)meta[BTREE_DEFAULT_CACHE_SIZE - 1]);
if (size == 0)
{
size = SQLITE_DEFAULT_CACHE_SIZE;
}
pDb.pSchema.cache_size = size;
sqlite3BtreeSetCacheSize(pDb.pBt, pDb.pSchema.cache_size);
}
/*
** file_format==1 Version 3.0.0.
** file_format==2 Version 3.1.3. // ALTER TABLE ADD COLUMN
** file_format==3 Version 3.1.4. // ditto but with non-NULL defaults
** file_format==4 Version 3.3.0. // DESC indices. Boolean constants
*/
pDb.pSchema.file_format = (u8)meta[BTREE_FILE_FORMAT - 1];
if (pDb.pSchema.file_format == 0)
{
pDb.pSchema.file_format = 1;
}
if (pDb.pSchema.file_format > SQLITE_MAX_FILE_FORMAT)
{
sqlite3SetString(ref pzErrMsg, db, "unsupported file format");
rc = SQLITE_ERROR;
goto initone_error_out;
}
/* Ticket #2804: When we open a database in the newer file format,
** clear the legacy_file_format pragma flag so that a VACUUM will
** not downgrade the database and thus invalidate any descending
** indices that the user might have created.
*/
if (iDb == 0 && meta[BTREE_FILE_FORMAT - 1] >= 4)
{
db.flags &= ~SQLITE_LegacyFileFmt;
}
/* Read the schema information out of the schema tables
*/
Debug.Assert(db.init.busy != 0);
{
string zSql;
zSql = sqlite3MPrintf(db,
"SELECT name, rootpage, sql FROM '%q'.%s ORDER BY rowid",
db.aDb[iDb].zName, zMasterName);
#if !SQLITE_OMIT_AUTHORIZATION
{
int (*xAuth)(void*,int,const char*,const char*,const char*,const char*);
xAuth = db.xAuth;
db.xAuth = 0;
#endif
rc = sqlite3_exec(db, zSql, (dxCallback)sqlite3InitCallback, initData, 0);
pzErrMsg = initData.pzErrMsg;
#if !SQLITE_OMIT_AUTHORIZATION
db.xAuth = xAuth;
}
#endif
if (rc == SQLITE_OK)
rc = initData.rc;
sqlite3DbFree(db, ref zSql);
#if !SQLITE_OMIT_ANALYZE
if (rc == SQLITE_OK)
{
sqlite3AnalysisLoad(db, iDb);
}
#endif
}
//if ( db.mallocFailed != 0 )
//{
// rc = SQLITE_NOMEM;
// sqlite3ResetInternalSchema( db, -1 );
//}
if (rc == SQLITE_OK || (db.flags & SQLITE_RecoveryMode) != 0)
{
/* Black magic: If the SQLITE_RecoveryMode flag is set, then consider
** the schema loaded, even if errors occurred. In this situation the
** current sqlite3_prepare() operation will fail, but the following one
** will attempt to compile the supplied statement against whatever subset
** of the schema was loaded before the error occurred. The primary
** purpose of this is to allow access to the sqlite_master table
** even when its contents have been corrupted.
*/
DbSetProperty(db, iDb, DB_SchemaLoaded);
rc = SQLITE_OK;
}
/* Jump here for an error that occurs after successfully allocating
** curMain and calling sqlite3BtreeEnter(). For an error that occurs
** before that point, jump to error_out.
*/
initone_error_out:
if (openedTransaction != 0)
{
sqlite3BtreeCommit(pDb.pBt);
}
sqlite3BtreeLeave(pDb.pBt);
error_out:
if (rc == SQLITE_NOMEM || rc == SQLITE_IOERR_NOMEM)
{
// db.mallocFailed = 1;
}
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 a database is initialized, the DB_SchemaLoaded bit is set
** bit is set in the flags field of the Db structure. If the database
** file was of zero-length, then the DB_Empty flag is also set.
*/
private static int sqlite3Init(sqlite3 db, ref string pzErrMsg)
{
int i, rc;
bool commit_internal = !((db.flags & SQLITE_InternChanges) != 0);
Debug.Assert(sqlite3_mutex_held(db.mutex));
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, ref pzErrMsg);
if (rc != 0)
{
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.
*/
#if !SQLITE_OMIT_TEMPDB
if (rc == SQLITE_OK && ALWAYS(db.nDb > 1)
&& !DbHasProperty(db, 1, DB_SchemaLoaded))
{
rc = sqlite3InitOne(db, 1, ref pzErrMsg);
if (rc != 0)
{
sqlite3ResetInternalSchema(db, 1);
}
}
#endif
db.init.busy = 0;
if (rc == SQLITE_OK && commit_internal)
{
sqlite3CommitInternalChanges(db);
}
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.
*/
private static int sqlite3ReadSchema(Parse pParse)
{
int rc = SQLITE_OK;
sqlite3 db = pParse.db;
Debug.Assert(sqlite3_mutex_held(db.mutex));
if (0 == db.init.busy)
{
rc = sqlite3Init(db, ref pParse.zErrMsg);
}
if (rc != SQLITE_OK)
{
pParse.rc = rc;
pParse.nErr++;
}
return rc;
}
/*
** Check schema cookies in all databases. If any cookie is out
** of date set pParse->rc to SQLITE_SCHEMA. If all schema cookies
** make no changes to pParse->rc.
*/
private static void schemaIsValid(Parse pParse)
{
sqlite3 db = pParse.db;
int iDb;
int rc;
u32 cookie = 0;
Debug.Assert(pParse.checkSchema != 0);
Debug.Assert(sqlite3_mutex_held(db.mutex));
for (iDb = 0; iDb < db.nDb; iDb++)
{
int openedTransaction = 0; /* True if a transaction is opened */
Btree pBt = db.aDb[iDb].pBt; /* Btree database to read cookie from */
if (pBt == null)
continue;
/* If there is not already a read-only (or read-write) transaction opened
** on the b-tree database, open one now. If a transaction is opened, it
** will be closed immediately after reading the meta-value. */
if (!sqlite3BtreeIsInReadTrans(pBt))
{
rc = sqlite3BtreeBeginTrans(pBt, 0);
//if ( rc == SQLITE_NOMEM || rc == SQLITE_IOERR_NOMEM )
//{
// db.mallocFailed = 1;
//}
if (rc != SQLITE_OK)
return;
openedTransaction = 1;
}
/* Read the schema cookie from the database. If it does not match the
** value stored as part of the in-memory schema representation,
** set Parse.rc to SQLITE_SCHEMA. */
sqlite3BtreeGetMeta(pBt, BTREE_SCHEMA_VERSION, ref cookie);
Debug.Assert(sqlite3SchemaMutexHeld(db, iDb, null));
if (cookie != db.aDb[iDb].pSchema.schema_cookie)
{
sqlite3ResetInternalSchema(db, iDb);
pParse.rc = SQLITE_SCHEMA;
}
/* Close the transaction, if one was opened. */
if (openedTransaction != 0)
{
sqlite3BtreeCommit(pBt);
}
}
}
/*
** Convert a schema pointer into the iDb index that indicates
** which database file in db.aDb[] the schema refers to.
**
** If the same database is attached more than once, the first
** attached database is returned.
*/
private static int sqlite3SchemaToIndex(sqlite3 db, Schema pSchema)
{
int i = -1000000;
/* If pSchema is NULL, then return -1000000. This happens when code in
** expr.c is trying to resolve a reference to a transient table (i.e. one
** created by a sub-select). In this case the return value of this
** function should never be used.
**
** We return -1000000 instead of the more usual -1 simply because using
** -1000000 as the incorrect index into db->aDb[] is much
** more likely to cause a segfault than -1 (of course there are assert()
** statements too, but it never hurts to play the odds).
*/
Debug.Assert(sqlite3_mutex_held(db.mutex));
if (pSchema != null)
{
for (i = 0; ALWAYS(i < db.nDb); i++)
{
if (db.aDb[i].pSchema == pSchema)
{
break;
}
}
Debug.Assert(i >= 0 && i < db.nDb);
}
return i;
}
/*
** Compile the UTF-8 encoded SQL statement zSql into a statement handle.
*/
private static int sqlite3Prepare(
sqlite3 db, /* Database handle. */
string zSql, /* UTF-8 encoded SQL statement. */
int nBytes, /* Length of zSql in bytes. */
int saveSqlFlag, /* True to copy SQL text into the sqlite3_stmt */
Vdbe pReprepare, /* VM being reprepared */
ref sqlite3_stmt ppStmt, /* OUT: A pointer to the prepared statement */
ref string pzTail /* OUT: End of parsed string */
)
{
Parse pParse; /* Parsing context */
string zErrMsg = ""; /* Error message */
int rc = SQLITE_OK; /* Result code */
int i; /* Loop counter */
ppStmt = null;
pzTail = null;
/* Allocate the parsing context */
pParse = new Parse();//sqlite3StackAllocZero(db, sizeof(*pParse));
//if ( pParse == null )
//{
// rc = SQLITE_NOMEM;
// goto end_prepare;
//}
pParse.pReprepare = pReprepare;
pParse.sLastToken.z = "";
// assert( ppStmt && *ppStmt==0 );
//Debug.Assert( 0 == db.mallocFailed );
Debug.Assert(sqlite3_mutex_held(db.mutex));
/* Check to verify that it is possible to get a read lock on all
** database schemas. The inability to get a read lock indicates that
** some other database connection is holding a write-lock, which in
** turn means that the other connection has made uncommitted changes
** to the schema.
**
** Were we to proceed and prepare the statement against the uncommitted
** schema changes and if those schema changes are subsequently rolled
** back and different changes are made in their place, then when this
** prepared statement goes to run the schema cookie would fail to detect
** the schema change. Disaster would follow.
**
** This thread is currently holding mutexes on all Btrees (because
** of the sqlite3BtreeEnterAll() in sqlite3LockAndPrepare()) so it
** is not possible for another thread to start a new schema change
** while this routine is running. Hence, we do not need to hold
** locks on the schema, we just need to make sure nobody else is
** holding them.
**
** Note that setting READ_UNCOMMITTED overrides most lock detection,
** but it does *not* override schema lock detection, so this all still
** works even if READ_UNCOMMITTED is set.
*/
for (i = 0; i < db.nDb; i++)
{
Btree pBt = db.aDb[i].pBt;
if (pBt != null)
{
Debug.Assert(sqlite3BtreeHoldsMutex(pBt));
rc = sqlite3BtreeSchemaLocked(pBt);
if (rc != 0)
{
string zDb = db.aDb[i].zName;
sqlite3Error(db, rc, "database schema is locked: %s", zDb);
testcase(db.flags & SQLITE_ReadUncommitted);
goto end_prepare;
}
}
}
sqlite3VtabUnlockList(db);
pParse.db = db;
pParse.nQueryLoop = (double)1;
if (nBytes >= 0 && (nBytes == 0 || zSql[nBytes - 1] != 0))
{
string zSqlCopy;
int mxLen = db.aLimit[SQLITE_LIMIT_SQL_LENGTH];
testcase(nBytes == mxLen);
testcase(nBytes == mxLen + 1);
if (nBytes > mxLen)
{
sqlite3Error(db, SQLITE_TOOBIG, "statement too long");
rc = sqlite3ApiExit(db, SQLITE_TOOBIG);
goto end_prepare;
}
zSqlCopy = zSql.Substring(0, nBytes);// sqlite3DbStrNDup(db, zSql, nBytes);
if (zSqlCopy != null)
{
sqlite3RunParser(pParse, zSqlCopy, ref zErrMsg);
sqlite3DbFree(db, ref zSqlCopy);
//pParse->zTail = &zSql[pParse->zTail-zSqlCopy];
}
else
{
//pParse->zTail = &zSql[nBytes];
}
}
else
{
sqlite3RunParser(pParse, zSql, ref zErrMsg);
}
Debug.Assert(1 == (int)pParse.nQueryLoop);
//if ( db.mallocFailed != 0 )
//{
// pParse.rc = SQLITE_NOMEM;
//}
if (pParse.rc == SQLITE_DONE)
pParse.rc = SQLITE_OK;
if (pParse.checkSchema != 0)
{
schemaIsValid(pParse);
}
//if ( db.mallocFailed != 0 )
//{
// pParse.rc = SQLITE_NOMEM;
//}
//if (pzTail != null)
{
pzTail = pParse.zTail == null ? "" : pParse.zTail.ToString();
}
rc = pParse.rc;
#if !SQLITE_OMIT_EXPLAIN
if (rc == SQLITE_OK && pParse.pVdbe != null && pParse.explain != 0)
{
string[] azColName = new string[] {
"addr", "opcode", "p1", "p2", "p3", "p4", "p5", "comment",
"selectid", "order", "from", "detail"
};
int iFirst, mx;
if (pParse.explain == 2)
{
sqlite3VdbeSetNumCols(pParse.pVdbe, 4);
iFirst = 8;
mx = 12;
}
else
{
sqlite3VdbeSetNumCols(pParse.pVdbe, 8);
iFirst = 0;
mx = 8;
}
for (i = iFirst; i < mx; i++)
{
sqlite3VdbeSetColName(pParse.pVdbe, i - iFirst, COLNAME_NAME,
azColName[i], SQLITE_STATIC);
}
}
#endif
Debug.Assert(db.init.busy == 0 || saveSqlFlag == 0);
if (db.init.busy == 0)
{
Vdbe pVdbe = pParse.pVdbe;
sqlite3VdbeSetSql(pVdbe, zSql, (int)(zSql.Length - (pParse.zTail == null ? 0 : pParse.zTail.Length)), saveSqlFlag);
}
if (pParse.pVdbe != null && (rc != SQLITE_OK /*|| db.mallocFailed != 0 */ ))
{
sqlite3VdbeFinalize(ref pParse.pVdbe);
//Debug.Assert( ppStmt == null );
}
else
{
ppStmt = pParse.pVdbe;
}
if (zErrMsg != "")
{
sqlite3Error(db, rc, "%s", zErrMsg);
sqlite3DbFree(db, ref zErrMsg);
}
else
{
sqlite3Error(db, rc, 0);
}
/* Delete any TriggerPrg structures allocated while parsing this statement. */
while (pParse.pTriggerPrg != null)
{
TriggerPrg pT = pParse.pTriggerPrg;
pParse.pTriggerPrg = pT.pNext;
sqlite3DbFree(db, ref pT);
}
end_prepare:
//sqlite3StackFree( db, pParse );
rc = sqlite3ApiExit(db, rc);
Debug.Assert((rc & db.errMask) == rc);
return rc;
}
//C# Version w/o End of Parsed String
private static int sqlite3LockAndPrepare(
sqlite3 db, /* Database handle. */
string zSql, /* UTF-8 encoded SQL statement. */
int nBytes, /* Length of zSql in bytes. */
int saveSqlFlag, /* True to copy SQL text into the sqlite3_stmt */
Vdbe pOld, /* VM being reprepared */
ref sqlite3_stmt ppStmt, /* OUT: A pointer to the prepared statement */
int dummy /* OUT: End of parsed string */
)
{
string sOut = null;
return sqlite3LockAndPrepare(db, zSql, nBytes, saveSqlFlag, pOld, ref ppStmt, ref sOut);
}
private static int sqlite3LockAndPrepare(
sqlite3 db, /* Database handle. */
string zSql, /* UTF-8 encoded SQL statement. */
int nBytes, /* Length of zSql in bytes. */
int saveSqlFlag, /* True to copy SQL text into the sqlite3_stmt */
Vdbe pOld, /* VM being reprepared */
ref sqlite3_stmt ppStmt, /* OUT: A pointer to the prepared statement */
ref string pzTail /* OUT: End of parsed string */
)
{
int rc;
// assert( ppStmt!=0 );
if (!sqlite3SafetyCheckOk(db))
{
ppStmt = null;
pzTail = null;
return SQLITE_MISUSE_BKPT();
}
sqlite3_mutex_enter(db.mutex);
sqlite3BtreeEnterAll(db);
rc = sqlite3Prepare(db, zSql, nBytes, saveSqlFlag, pOld, ref ppStmt, ref pzTail);
if (rc == SQLITE_SCHEMA)
{
sqlite3_finalize(ppStmt);
rc = sqlite3Prepare(db, zSql, nBytes, saveSqlFlag, pOld, ref ppStmt, ref pzTail);
}
sqlite3BtreeLeaveAll(db);
sqlite3_mutex_leave(db.mutex);
return rc;
}
/*
** Rerun the compilation of a statement after a schema change.
**
** If the statement is successfully recompiled, return SQLITE_OK. Otherwise,
** if the statement cannot be recompiled because another connection has
** locked the sqlite3_master table, return SQLITE_LOCKED. If any other error
** occurs, return SQLITE_SCHEMA.
*/
private static int sqlite3Reprepare(Vdbe p)
{
int rc;
sqlite3_stmt pNew = new sqlite3_stmt();
string zSql;
sqlite3 db;
Debug.Assert(sqlite3_mutex_held(sqlite3VdbeDb(p).mutex));
zSql = sqlite3_sql((sqlite3_stmt)p);
Debug.Assert(zSql != null); /* Reprepare only called for prepare_v2() statements */
db = sqlite3VdbeDb(p);
Debug.Assert(sqlite3_mutex_held(db.mutex));
rc = sqlite3LockAndPrepare(db, zSql, -1, 0, p, ref pNew, 0);
if (rc != 0)
{
if (rc == SQLITE_NOMEM)
{
// db.mallocFailed = 1;
}
Debug.Assert(pNew == null);
return rc;
}
else
{
Debug.Assert(pNew != null);
}
sqlite3VdbeSwap((Vdbe)pNew, p);
sqlite3TransferBindings(pNew, (sqlite3_stmt)p);
sqlite3VdbeResetStepResult((Vdbe)pNew);
sqlite3VdbeFinalize(ref pNew);
return SQLITE_OK;
}
//C# Overload for ignore error out
static public int sqlite3_prepare(
sqlite3 db, /* Database handle. */
string zSql, /* UTF-8 encoded SQL statement. */
int nBytes, /* Length of zSql in bytes. */
ref sqlite3_stmt ppStmt, /* OUT: A pointer to the prepared statement */
int dummy /* OUT: End of parsed string */
)
{
string sOut = null;
return sqlite3_prepare(db, zSql, nBytes, ref ppStmt, ref sOut);
}
static public int sqlite3_prepare(
sqlite3 db, /* Database handle. */
StringBuilder zSql, /* UTF-8 encoded SQL statement. */
int nBytes, /* Length of zSql in bytes. */
ref sqlite3_stmt ppStmt, /* OUT: A pointer to the prepared statement */
int dummy /* OUT: End of parsed string */
)
{
string sOut = null;
return sqlite3_prepare(db, zSql.ToString(), nBytes, ref ppStmt, ref sOut);
}
/*
** Two versions of the official API. Legacy and new use. In the legacy
** version, the original SQL text is not saved in the prepared statement
** and so if a schema change occurs, SQLITE_SCHEMA is returned by
** sqlite3_step(). In the new version, the original SQL text is retained
** and the statement is automatically recompiled if an schema change
** occurs.
*/
static public int sqlite3_prepare(
sqlite3 db, /* Database handle. */
string zSql, /* UTF-8 encoded SQL statement. */
int nBytes, /* Length of zSql in bytes. */
ref sqlite3_stmt ppStmt, /* OUT: A pointer to the prepared statement */
ref string pzTail /* OUT: End of parsed string */
)
{
int rc;
rc = sqlite3LockAndPrepare(db, zSql, nBytes, 0, null, ref ppStmt, ref pzTail);
Debug.Assert(rc == SQLITE_OK || ppStmt == null); /* VERIFY: F13021 */
return rc;
}
public static int sqlite3_prepare_v2(
sqlite3 db, /* Database handle. */
string zSql, /* UTF-8 encoded SQL statement. */
int nBytes, /* Length of zSql in bytes. */
ref sqlite3_stmt ppStmt, /* OUT: A pointer to the prepared statement */
int dummy /* ( No string passed) */
)
{
string pzTail = null;
int rc;
rc = sqlite3LockAndPrepare(db, zSql, nBytes, 1, null, ref ppStmt, ref pzTail);
Debug.Assert(rc == SQLITE_OK || ppStmt == null); /* VERIFY: F13021 */
return rc;
}
public static int sqlite3_prepare_v2(
sqlite3 db, /* Database handle. */
string zSql, /* UTF-8 encoded SQL statement. */
int nBytes, /* Length of zSql in bytes. */
ref sqlite3_stmt ppStmt, /* OUT: A pointer to the prepared statement */
ref string pzTail /* OUT: End of parsed string */
)
{
int rc;
rc = sqlite3LockAndPrepare(db, zSql, nBytes, 1, null, ref ppStmt, ref pzTail);
Debug.Assert(rc == SQLITE_OK || ppStmt == null); /* VERIFY: F13021 */
return rc;
}
#if !SQLITE_OMIT_UTF16
/*
** Compile the UTF-16 encoded SQL statement zSql into a statement handle.
*/
static int sqlite3Prepare16(
sqlite3 db, /* Database handle. */
string zSql, /* UTF-15 encoded SQL statement. */
int nBytes, /* Length of zSql in bytes. */
bool saveSqlFlag, /* True to save SQL text into the sqlite3_stmt */
out sqlite3_stmt ppStmt, /* OUT: A pointer to the prepared statement */
out string 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.
*/
string zSql8;
string zTail8 = "";
int rc = SQLITE_OK;
assert( ppStmt );
*ppStmt = 0;
if( !sqlite3SafetyCheckOk(db) ){
return SQLITE_MISUSE_BKPT;
}
sqlite3_mutex_enter(db.mutex);
zSql8 = sqlite3Utf16to8(db, zSql, nBytes, SQLITE_UTF16NATIVE);
if( zSql8 !=""){
rc = sqlite3LockAndPrepare(db, zSql8, -1, saveSqlFlag, null, ref ppStmt, ref 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.
*/
Debugger.Break (); // TODO --
// int chars_parsed = sqlite3Utf8CharLen(zSql8, (int)(zTail8-zSql8));
// pzTail = (u8 *)zSql + sqlite3Utf16ByteLen(zSql, chars_parsed);
}
sqlite3DbFree(db,ref zSql8);
rc = sqlite3ApiExit(db, rc);
sqlite3_mutex_leave(db.mutex);
return rc;
}
/*
** Two versions of the official API. Legacy and new use. In the legacy
** version, the original SQL text is not saved in the prepared statement
** and so if a schema change occurs, SQLITE_SCHEMA is returned by
** sqlite3_step(). In the new version, the original SQL text is retained
** and the statement is automatically recompiled if an schema change
** occurs.
*/
public static int sqlite3_prepare16(
sqlite3 db, /* Database handle. */
string zSql, /* UTF-16 encoded SQL statement. */
int nBytes, /* Length of zSql in bytes. */
out sqlite3_stmt ppStmt, /* OUT: A pointer to the prepared statement */
out string pzTail /* OUT: End of parsed string */
){
int rc;
rc = sqlite3Prepare16(db,zSql,nBytes,false,ref ppStmt,ref pzTail);
Debug.Assert( rc==SQLITE_OK || ppStmt==null || ppStmt==null ); /* VERIFY: F13021 */
return rc;
}
public static int sqlite3_prepare16_v2(
sqlite3 db, /* Database handle. */
string zSql, /* UTF-16 encoded SQL statement. */
int nBytes, /* Length of zSql in bytes. */
out sqlite3_stmt ppStmt, /* OUT: A pointer to the prepared statement */
out string pzTail /* OUT: End of parsed string */
)
{
int rc;
rc = sqlite3Prepare16(db,zSql,nBytes,true,ref ppStmt,ref pzTail);
Debug.Assert( rc==SQLITE_OK || ppStmt==null || ppStmt==null ); /* VERIFY: F13021 */
return rc;
}
#endif // * SQLITE_OMIT_UTF16 */
}
}
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