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executable file
·4411 lines (4174 loc) · 135 KB
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using System;
using System.Diagnostics;
using System.IO;
using System.Text;
using i16 = System.Int16;
using u8 = System.Byte;
using u16 = System.UInt16;
using u32 = System.UInt32;
using Pgno = System.UInt32;
/*
** The yDbMask datatype for the bitmask of all attached databases.
*/
#if SQLITE_MAX_ATTACHED//>30
// typedef sqlite3_uint64 yDbMask;
using yDbMask = System.Int64;
#else
// typedef unsigned int yDbMask;
using yDbMask = System.Int32;
#endif
namespace System.Data.SQLite
{
public partial class Sqlite3
{
/*
** 2001 September 15
**
** 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 C code routines that are called by the SQLite parser
** when syntax rules are reduced. The routines in this file handle the
** following kinds of SQL syntax:
**
** CREATE TABLE
** DROP TABLE
** CREATE INDEX
** DROP INDEX
** creating ID lists
** BEGIN TRANSACTION
** COMMIT
** ROLLBACK
*************************************************************************
** 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: 2011-06-23 19:49:22 4374b7e83ea0a3fbc3691f9c0c936272862f32f2
**
*************************************************************************
*/
//#include "sqliteInt.h"
/*
** This routine is called when a new SQL statement is beginning to
** be parsed. Initialize the pParse structure as needed.
*/
static void sqlite3BeginParse(Parse pParse, int explainFlag)
{
pParse.explain = (byte)explainFlag;
pParse.nVar = 0;
}
#if !SQLITE_OMIT_SHARED_CACHE
/*
** The TableLock structure is only used by the sqlite3TableLock() and
** codeTableLocks() functions.
*/
//struct TableLock {
// int iDb; /* The database containing the table to be locked */
// int iTab; /* The root page of the table to be locked */
// u8 isWriteLock; /* True for write lock. False for a read lock */
// string zName; /* Name of the table */
//};
public class TableLock
{
public int iDb; /* The database containing the table to be locked */
public int iTab; /* The root page of the table to be locked */
public u8 isWriteLock; /* True for write lock. False for a read lock */
public string zName; /* Name of the table */
}
/*
** Record the fact that we want to lock a table at run-time.
**
** The table to be locked has root page iTab and is found in database iDb.
** A read or a write lock can be taken depending on isWritelock.
**
** This routine just records the fact that the lock is desired. The
** code to make the lock occur is generated by a later call to
** codeTableLocks() which occurs during sqlite3FinishCoding().
*/
void sqlite3TableLock(
Parse *pParse, /* Parsing context */
int iDb, /* Index of the database containing the table to lock */
int iTab, /* Root page number of the table to be locked */
u8 isWriteLock, /* True for a write lock */
string zName /* Name of the table to be locked */
){
Parse *pToplevel = sqlite3ParseToplevel(pParse);
int i;
int nBytes;
TableLock *p;
Debug.Assert( iDb>=0 );
for(i=0; i<pToplevel->nTableLock; i++){
p = pToplevel->aTableLock[i];
if( p->iDb==iDb && p->iTab==iTab ){
p->isWriteLock = (p->isWriteLock || isWriteLock);
return;
}
}
nBytes = sizeof(vtableLock) * (pToplevel->nTableLock+1);
pToplevel->aTableLock =
sqlite3DbReallocOrFree(pToplevel->db, pToplevel->aTableLock, nBytes);
if( pToplevel->aTableLock ){
p = pToplevel->aTableLock[pToplevel->nTableLock++];
p->iDb = iDb;
p->iTab = iTab;
p->isWriteLock = isWriteLock;
p->zName = zName;
}else{
pToplevel->nTableLock = 0;
pToplevel->db->mallocFailed = 1;
}
}
/*
** Code an OP_TableLock instruction for each table locked by the
** statement (configured by calls to sqlite3TableLock()).
*/
static void codeTableLocks( Parse pParse )
{
int i;
Vdbe pVdbe;
pVdbe = sqlite3GetVdbe( pParse );
Debug.Assert( pVdbe != null ); /* sqlite3GetVdbe cannot fail: VDBE already allocated */
for ( i = 0 ; i < pParse.nTableLock ; i++ )
{
TableLock p = pParse.aTableLock[i];
int p1 = p.iDb;
sqlite3VdbeAddOp4( pVdbe, OP_TableLock, p1, p.iTab, p.isWriteLock,
p.zName, P4_STATIC );
}
}
#else
// #define codeTableLocks(x)
static void codeTableLocks(Parse pParse)
{
}
#endif
/// <summary>
/// This routine is called after a single SQL statement has been
/// parsed and a VDBE program to execute that statement has been
/// prepared. This routine puts the finishing touches on the
/// VDBE program and resets the pParse structure for the next
/// parse.
///
/// Note that if an error occurred, it might be the case that
/// no VDBE code was generated.
/// </summary>
/// <param name='pParse'>
/// P parse.
/// </param>
static void sqlite3FinishCoding(Parse pParse)
{
sqlite3 db;
Vdbe v;
db = pParse.db;
// if ( db.mallocFailed != 0 ) return;
if (pParse.nested != 0)
return;
if (pParse.nErr != 0)
return;
/* Begin by generating some termination code at the end of the
** vdbe program
*/
v = sqlite3GetVdbe(pParse);
if (v != null)
{
sqlite3VdbeAddOp0(v, OP_Halt);
/* The cookie mask contains one bit for each database file open.
** (Bit 0 is for main, bit 1 is for temp, and so forth.) Bits are
** set for each database that is used. Generate code to start a
** transaction on each used database and to verify the schema cookie
** on each used database.
*/
if (pParse.cookieGoto > 0)
{
u32 mask;
int iDb;
sqlite3VdbeJumpHere(v, pParse.cookieGoto - 1);
for (iDb = 0, mask = 1; iDb < db.nDb; mask <<= 1, iDb++)
{
if ((mask & pParse.cookieMask) == 0)
continue;
sqlite3VdbeUsesBtree(v, iDb);
sqlite3VdbeAddOp2(v, OP_Transaction, iDb, (mask & pParse.writeMask) != 0);
if (db.init.busy == 0)
{
Debug.Assert(sqlite3SchemaMutexHeld(db, iDb, null));
sqlite3VdbeAddOp3(v, OP_VerifyCookie,
iDb, pParse.cookieValue[iDb],
(int)db.aDb[iDb].pSchema.iGeneration);
}
}
#if !SQLITE_OMIT_VIRTUALTABLE
{
int i;
for (i = 0; i < pParse.nVtabLock; i++)
{
VTable vtab = sqlite3GetVTable(db, pParse.apVtabLock[i]);
sqlite3VdbeAddOp4(v, OP_VBegin, 0, 0, 0, vtab, P4_VTAB);
}
pParse.nVtabLock = 0;
}
#endif
/* Once all the cookies have been verified and transactions opened,
** obtain the required table-locks. This is a no-op unless the
** shared-cache feature is enabled.
*/
codeTableLocks(pParse);
/* Initialize any AUTOINCREMENT data structures required.
*/
sqlite3AutoincrementBegin(pParse);
/* Finally, jump back to the beginning of the executable code. */
sqlite3VdbeAddOp2(v, OP_Goto, 0, pParse.cookieGoto);
}
}
/* Get the VDBE program ready for execution
*/
if (v != null && ALWAYS(pParse.nErr == 0) /* && 0 == db.mallocFailed */ )
{
#if SQLITE_DEBUG
TextWriter trace = ( db.flags & SQLITE_VdbeTrace ) != 0 ? Console.Out : null;
sqlite3VdbeTrace( v, trace );
#endif
Debug.Assert(pParse.iCacheLevel == 0); /* Disables and re-enables match */
/* A minimum of one cursor is required if autoincrement is used
* See ticket [a696379c1f08866] */
if (pParse.pAinc != null && pParse.nTab == 0)
pParse.nTab = 1;
sqlite3VdbeMakeReady(v, pParse);
pParse.rc = SQLITE_DONE;
pParse.colNamesSet = 0;
}
else
{
pParse.rc = SQLITE_ERROR;
}
pParse.nTab = 0;
pParse.nMem = 0;
pParse.nSet = 0;
pParse.nVar = 0;
pParse.cookieMask = 0;
pParse.cookieGoto = 0;
}
/*
** Run the parser and code generator recursively in order to generate
** code for the SQL statement given onto the end of the pParse context
** currently under construction. When the parser is run recursively
** this way, the final OP_Halt is not appended and other initialization
** and finalization steps are omitted because those are handling by the
** outermost parser.
**
** Not everything is nestable. This facility is designed to permit
** INSERT, UPDATE, and DELETE operations against SQLITE_MASTER. Use
** care if you decide to try to use this routine for some other purposes.
*/
static void sqlite3NestedParse(Parse pParse, string zFormat, params object[] ap)
{
string zSql; // string zSql;
string zErrMsg = "";// char* zErrMsg = 0;
sqlite3 db = pParse.db;
//# define SAVE_SZ (Parse.Length - offsetof(Parse,nVar))
// char saveBuf[SAVE_SZ];
if (pParse.nErr != 0)
return;
Debug.Assert(pParse.nested < 10); /* Nesting should only be of limited depth */
// va_list ap;
lock (lock_va_list)
{
va_start(ap, zFormat);
zSql = sqlite3VMPrintf(db, zFormat, ap);
va_end(ref ap);
}
//if( zSql=="" ){
// return; /* A malloc must have failed */
//}
lock (nestingLock)
{
pParse.nested++;
pParse.SaveMembers(); // memcpy(saveBuf, pParse.nVar, SAVE_SZ);
pParse.ResetMembers(); // memset(pParse.nVar, 0, SAVE_SZ);
sqlite3RunParser(pParse, zSql, ref zErrMsg);
sqlite3DbFree(db, ref zErrMsg);
sqlite3DbFree(db, ref zSql);
pParse.RestoreMembers(); // memcpy(pParse.nVar, saveBuf, SAVE_SZ);
pParse.nested--;
}
}
static Object nestingLock = new Object();
/*
** Locate the in-memory structure that describes a particular database
** table given the name of that table and (optionally) the name of the
** database containing the table. Return NULL if not found.
**
** If zDatabase is 0, all databases are searched for the table and the
** first matching table is returned. (No checking for duplicate table
** names is done.) The search order is TEMP first, then MAIN, then any
** auxiliary databases added using the ATTACH command.
**
** See also sqlite3LocateTable().
*/
static Table sqlite3FindTable(sqlite3 db, string zName, string zDatabase)
{
Table p = null;
int i;
int nName;
Debug.Assert(zName != null);
nName = sqlite3Strlen30(zName);
/* All mutexes are required for schema access. Make sure we hold them. */
Debug.Assert(zDatabase != null || sqlite3BtreeHoldsAllMutexes(db));
for (i = OMIT_TEMPDB; i < db.nDb; i++)
{
int j = (i < 2) ? i ^ 1 : i; /* Search TEMP before MAIN */
if (zDatabase != null && !zDatabase.Equals(db.aDb[j].zName, StringComparison.InvariantCultureIgnoreCase))
continue;
Debug.Assert(sqlite3SchemaMutexHeld(db, j, null));
p = sqlite3HashFind(db.aDb[j].pSchema.tblHash, zName, nName, (Table)null);
if (p != null)
break;
}
return p;
}
/*
** Locate the in-memory structure that describes a particular database
** table given the name of that table and (optionally) the name of the
** database containing the table. Return NULL if not found. Also leave an
** error message in pParse.zErrMsg.
**
** The difference between this routine and sqlite3FindTable() is that this
** routine leaves an error message in pParse.zErrMsg where
** sqlite3FindTable() does not.
*/
static Table sqlite3LocateTable(
Parse pParse, /* context in which to report errors */
int isView, /* True if looking for a VIEW rather than a TABLE */
string zName, /* Name of the table we are looking for */
string zDbase /* Name of the database. Might be NULL */
)
{
Table p;
/* Read the database schema. If an error occurs, leave an error message
** and code in pParse and return NULL. */
if (SQLITE_OK != sqlite3ReadSchema(pParse))
{
return null;
}
p = sqlite3FindTable(pParse.db, zName, zDbase);
if (p == null)
{
string zMsg = isView != 0 ? "no such view" : "no such table";
if (zDbase != null)
{
sqlite3ErrorMsg(pParse, "%s: %s.%s", zMsg, zDbase, zName);
}
else
{
sqlite3ErrorMsg(pParse, "%s: %s", zMsg, zName);
}
pParse.checkSchema = 1;
}
return p;
}
/*
** Locate the in-memory structure that describes
** a particular index given the name of that index
** and the name of the database that contains the index.
** Return NULL if not found.
**
** If zDatabase is 0, all databases are searched for the
** table and the first matching index is returned. (No checking
** for duplicate index names is done.) The search order is
** TEMP first, then MAIN, then any auxiliary databases added
** using the ATTACH command.
*/
static Index sqlite3FindIndex(sqlite3 db, string zName, string zDb)
{
Index p = null;
int i;
int nName = sqlite3Strlen30(zName);
/* All mutexes are required for schema access. Make sure we hold them. */
Debug.Assert(zDb != null || sqlite3BtreeHoldsAllMutexes(db));
for (i = OMIT_TEMPDB; i < db.nDb; i++)
{
int j = (i < 2) ? i ^ 1 : i; /* Search TEMP before MAIN */
Schema pSchema = db.aDb[j].pSchema;
Debug.Assert(pSchema != null);
if (zDb != null && !zDb.Equals(db.aDb[j].zName, StringComparison.InvariantCultureIgnoreCase))
continue;
Debug.Assert(sqlite3SchemaMutexHeld(db, j, null));
p = sqlite3HashFind(pSchema.idxHash, zName, nName, (Index)null);
if (p != null)
break;
}
return p;
}
/*
** Reclaim the memory used by an index
*/
static void freeIndex(sqlite3 db, ref Index p)
{
#if !SQLITE_OMIT_ANALYZE
sqlite3DeleteIndexSamples(db, p);
#endif
sqlite3DbFree(db, ref p.zColAff);
sqlite3DbFree(db, ref p);
}
/*
** For the index called zIdxName which is found in the database iDb,
** unlike that index from its Table then remove the index from
** the index hash table and free all memory structures associated
** with the index.
*/
static void sqlite3UnlinkAndDeleteIndex(sqlite3 db, int iDb, string zIdxName)
{
Index pIndex;
int len;
Hash pHash;
Debug.Assert(sqlite3SchemaMutexHeld(db, iDb, null));
pHash = db.aDb[iDb].pSchema.idxHash;
len = sqlite3Strlen30(zIdxName);
pIndex = sqlite3HashInsert(ref pHash, zIdxName, len, (Index)null);
if (ALWAYS(pIndex))
{
if (pIndex.pTable.pIndex == pIndex)
{
pIndex.pTable.pIndex = pIndex.pNext;
}
else
{
Index p;
/* Justification of ALWAYS(); The index must be on the list of
** indices. */
p = pIndex.pTable.pIndex;
while (ALWAYS(p != null) && p.pNext != pIndex)
{
p = p.pNext;
}
if (ALWAYS(p != null && p.pNext == pIndex))
{
p.pNext = pIndex.pNext;
}
}
freeIndex(db, ref pIndex);
}
db.flags |= SQLITE_InternChanges;
}
/*
** Erase all schema information from the in-memory hash tables of
** a single database. This routine is called to reclaim memory
** before the database closes. It is also called during a rollback
** if there were schema changes during the transaction or if a
** schema-cookie mismatch occurs.
**
** If iDb<0 then reset the internal schema tables for all database
** files. If iDb>=0 then reset the internal schema for only the
** single file indicated.
*/
static void sqlite3ResetInternalSchema(sqlite3 db, int iDb)
{
int i, j;
Debug.Assert(iDb < db.nDb);
if (iDb >= 0)
{
/* Case 1: Reset the single schema identified by iDb */
Db pDb = db.aDb[iDb];
Debug.Assert(sqlite3SchemaMutexHeld(db, iDb, null));
Debug.Assert(pDb.pSchema != null);
sqlite3SchemaClear(pDb.pSchema);
/* If any database other than TEMP is reset, then also reset TEMP
** since TEMP might be holding triggers that reference tables in the
** other database.
*/
if (iDb != 1)
{
pDb = db.aDb[1];
Debug.Assert(pDb.pSchema != null);
sqlite3SchemaClear(pDb.pSchema);
}
return;
}
/* Case 2 (from here to the end): Reset all schemas for all attached
** databases. */
Debug.Assert(iDb < 0);
sqlite3BtreeEnterAll(db);
for (i = 0; i < db.nDb; i++)
{
Db pDb = db.aDb[i];
if (pDb.pSchema != null)
{
sqlite3SchemaClear(pDb.pSchema);
}
}
db.flags &= ~SQLITE_InternChanges;
sqlite3VtabUnlockList(db);
sqlite3BtreeLeaveAll(db);
/* If one or more of the auxiliary database files has been closed,
** then remove them from the auxiliary database list. We take the
** opportunity to do this here since we have just deleted all of the
** schema hash tables and therefore do not have to make any changes
** to any of those tables.
*/
for (i = j = 2; i < db.nDb; i++)
{
Db pDb = db.aDb[i];
if (pDb.pBt == null)
{
sqlite3DbFree(db, ref pDb.zName);
continue;
}
if (j < i)
{
db.aDb[j] = db.aDb[i];
}
j++;
}
if (db.nDb != j)
db.aDb[j] = new Db();//memset(db.aDb[j], 0, (db.nDb-j)*sizeof(db.aDb[j]));
db.nDb = j;
if (db.nDb <= 2 && db.aDb != db.aDbStatic)
{
Array.Copy(db.aDb, db.aDbStatic, 2);// memcpy(db.aDbStatic, db.aDb, 2*sizeof(db.aDb[0]));
//sqlite3DbFree( db, ref db.aDb );
//db.aDb = db.aDbStatic;
}
}
/*
** This routine is called when a commit occurs.
*/
static void sqlite3CommitInternalChanges(sqlite3 db)
{
db.flags &= ~SQLITE_InternChanges;
}
/*
** Delete memory allocated for the column names of a table or view (the
** Table.aCol[] array).
*/
static void sqliteDeleteColumnNames(sqlite3 db, Table pTable)
{
int i;
Column pCol;
Debug.Assert(pTable != null);
for (i = 0; i < pTable.nCol; i++)
{
pCol = pTable.aCol[i];
if (pCol != null)
{
sqlite3DbFree(db, ref pCol.zName);
sqlite3ExprDelete(db, ref pCol.pDflt);
sqlite3DbFree(db, ref pCol.zDflt);
sqlite3DbFree(db, ref pCol.zType);
sqlite3DbFree(db, ref pCol.zColl);
}
}
}
/*
** Remove the memory data structures associated with the given
** Table. No changes are made to disk by this routine.
**
** This routine just deletes the data structure. It does not unlink
** the table data structure from the hash table. But it does destroy
** memory structures of the indices and foreign keys associated with
** the table.
*/
static void sqlite3DeleteTable(sqlite3 db, ref Table pTable)
{
Index pIndex;
Index pNext;
Debug.Assert(null == pTable || pTable.nRef > 0);
/* Do not delete the table until the reference count reaches zero. */
if (null == pTable)
return;
if ((// ( !db || db->pnBytesFreed == 0 ) &&
(--pTable.nRef) > 0))
return;
/* Delete all indices associated with this table. */
for (pIndex = pTable.pIndex; pIndex != null; pIndex = pNext)
{
pNext = pIndex.pNext;
Debug.Assert(pIndex.pSchema == pTable.pSchema);
//if( null==db || db.pnBytesFreed==0 ){
string zName = pIndex.zName;
//
#if !NDEBUG || SQLITE_COVERAGE_TEST
// TESTONLY ( Index pOld = ) sqlite3HashInsert(
//ref pIndex.pSchema.idxHash, zName, sqlite3Strlen30(zName), 0
// );
Index pOld = sqlite3HashInsert(
ref pIndex.pSchema.idxHash, zName, sqlite3Strlen30( zName ), (Index)null
);
Debug.Assert( db == null || sqlite3SchemaMutexHeld( db, 0, pIndex.pSchema ) );
Debug.Assert( pOld == pIndex || pOld == null );
#else
// TESTONLY ( Index pOld = ) sqlite3HashInsert(
//ref pIndex.pSchema.idxHash, zName, sqlite3Strlen30(zName), 0
// );
sqlite3HashInsert(
ref pIndex.pSchema.idxHash, zName, sqlite3Strlen30(zName), (Index)null
);
#endif
//}
freeIndex(db, ref pIndex);
}
/* Delete any foreign keys attached to this table. */
sqlite3FkDelete(db, pTable);
/* Delete the Table structure itself.
*/
sqliteDeleteColumnNames(db, pTable);
sqlite3DbFree(db, ref pTable.zName);
sqlite3DbFree(db, ref pTable.zColAff);
sqlite3SelectDelete(db, ref pTable.pSelect);
#if !SQLITE_OMIT_CHECK
sqlite3ExprDelete(db, ref pTable.pCheck);
#endif
#if !SQLITE_OMIT_VIRTUALTABLE
sqlite3VtabClear(db, pTable);
#endif
pTable = null;// sqlite3DbFree( db, ref pTable );
}
/*
** Unlink the given table from the hash tables and the delete the
** table structure with all its indices and foreign keys.
*/
static void sqlite3UnlinkAndDeleteTable(sqlite3 db, int iDb, string zTabName)
{
Table p;
Db pDb;
Debug.Assert(db != null);
Debug.Assert(iDb >= 0 && iDb < db.nDb);
Debug.Assert(zTabName != null);
Debug.Assert(sqlite3SchemaMutexHeld(db, iDb, null));
testcase(zTabName.Length == 0); /* Zero-length table names are allowed */
pDb = db.aDb[iDb];
p = sqlite3HashInsert(ref pDb.pSchema.tblHash, zTabName,
sqlite3Strlen30(zTabName), (Table)null);
sqlite3DeleteTable(db, ref p);
db.flags |= SQLITE_InternChanges;
}
/*
** Given a token, return a string that consists of the text of that
** token. Space to hold the returned string
** is obtained from sqliteMalloc() and must be freed by the calling
** function.
**
** Any quotation marks (ex: "name", 'name', [name], or `name`) that
** surround the body of the token are removed.
**
** Tokens are often just pointers into the original SQL text and so
** are not \000 terminated and are not persistent. The returned string
** is \000 terminated and is persistent.
*/
static string sqlite3NameFromToken(sqlite3 db, Token pName)
{
string zName;
if (pName != null && pName.z != null)
{
zName = pName.z.Substring(0, pName.n);//sqlite3DbStrNDup(db, (char)pName.z, pName.n);
sqlite3Dequote(ref zName);
}
else
{
return null;
}
return zName;
}
/*
** Open the sqlite_master table stored in database number iDb for
** writing. The table is opened using cursor 0.
*/
static void sqlite3OpenMasterTable(Parse p, int iDb)
{
Vdbe v = sqlite3GetVdbe(p);
sqlite3TableLock(p, iDb, MASTER_ROOT, 1, SCHEMA_TABLE(iDb));
sqlite3VdbeAddOp3(v, OP_OpenWrite, 0, MASTER_ROOT, iDb);
sqlite3VdbeChangeP4(v, -1, (int)5, P4_INT32); /* 5 column table */
if (p.nTab == 0)
{
p.nTab = 1;
}
}
/*
** Parameter zName points to a nul-terminated buffer containing the name
** of a database ("main", "temp" or the name of an attached db). This
** function returns the index of the named database in db->aDb[], or
** -1 if the named db cannot be found.
*/
static int sqlite3FindDbName(sqlite3 db, string zName)
{
int i = -1; /* Database number */
if (zName != null)
{
Db pDb;
int n = sqlite3Strlen30(zName);
for (i = (db.nDb - 1); i >= 0; i--)
{
pDb = db.aDb[i];
if ((OMIT_TEMPDB == 0 || i != 1) && n == sqlite3Strlen30(pDb.zName) &&
pDb.zName.Equals(zName, StringComparison.InvariantCultureIgnoreCase))
{
break;
}
}
}
return i;
}
/*
** The token *pName contains the name of a database (either "main" or
** "temp" or the name of an attached db). This routine returns the
** index of the named database in db->aDb[], or -1 if the named db
** does not exist.
*/
static int sqlite3FindDb(sqlite3 db, Token pName)
{
int i; /* Database number */
string zName; /* Name we are searching for */
zName = sqlite3NameFromToken(db, pName);
i = sqlite3FindDbName(db, zName);
sqlite3DbFree(db, ref zName);
return i;
}
/* The table or view or trigger name is passed to this routine via tokens
** pName1 and pName2. If the table name was fully qualified, for example:
**
** CREATE TABLE xxx.yyy (...);
**
** Then pName1 is set to "xxx" and pName2 "yyy". On the other hand if
** the table name is not fully qualified, i.e.:
**
** CREATE TABLE yyy(...);
**
** Then pName1 is set to "yyy" and pName2 is "".
**
** This routine sets the ppUnqual pointer to point at the token (pName1 or
** pName2) that stores the unqualified table name. The index of the
** database "xxx" is returned.
*/
static int sqlite3TwoPartName(
Parse pParse, /* Parsing and code generating context */
Token pName1, /* The "xxx" in the name "xxx.yyy" or "xxx" */
Token pName2, /* The "yyy" in the name "xxx.yyy" */
ref Token pUnqual /* Write the unqualified object name here */
)
{
int iDb; /* Database holding the object */
sqlite3 db = pParse.db;
if (ALWAYS(pName2 != null) && pName2.n > 0)
{
if (db.init.busy != 0)
{
sqlite3ErrorMsg(pParse, "corrupt database");
pParse.nErr++;
return -1;
}
pUnqual = pName2;
iDb = sqlite3FindDb(db, pName1);
if (iDb < 0)
{
sqlite3ErrorMsg(pParse, "unknown database %T", pName1);
pParse.nErr++;
return -1;
}
}
else
{
Debug.Assert(db.init.iDb == 0 || db.init.busy != 0);
iDb = db.init.iDb;
pUnqual = pName1;
}
return iDb;
}
/*
** This routine is used to check if the UTF-8 string zName is a legal
** unqualified name for a new schema object (vtable, index, view or
** trigger). All names are legal except those that begin with the string
** "sqlite_" (in upper, lower or mixed case). This portion of the namespace
** is reserved for internal use.
*/
static int sqlite3CheckObjectName(Parse pParse, string zName)
{
if (0 == pParse.db.init.busy && pParse.nested == 0
&& (pParse.db.flags & SQLITE_WriteSchema) == 0
&& zName.StartsWith("sqlite_", System.StringComparison.InvariantCultureIgnoreCase))
{
sqlite3ErrorMsg(pParse, "object name reserved for internal use: %s", zName);
return SQLITE_ERROR;
}
return SQLITE_OK;
}
/*
** Begin constructing a new table representation in memory. This is
** the first of several action routines that get called in response
** to a CREATE TABLE statement. In particular, this routine is called
** after seeing tokens "CREATE" and "TABLE" and the table name. The isTemp
** flag is true if the table should be stored in the auxiliary database
** file instead of in the main database file. This is normally the case
** when the "TEMP" or "TEMPORARY" keyword occurs in between
** CREATE and TABLE.
**
** The new table record is initialized and put in pParse.pNewTable.
** As more of the CREATE TABLE statement is parsed, additional action
** routines will be called to add more information to this record.
** At the end of the CREATE TABLE statement, the sqlite3EndTable() routine
** is called to complete the construction of the new table record.
*/
static void sqlite3StartTable(
Parse pParse, /* Parser context */
Token pName1, /* First part of the name of the table or view */
Token pName2, /* Second part of the name of the table or view */
int isTemp, /* True if this is a TEMP table */
int isView, /* True if this is a VIEW */
int isVirtual, /* True if this is a VIRTUAL table */
int noErr /* Do nothing if table already exists */
)
{
Table pTable;
string zName = null; /* The name of the new table */
sqlite3 db = pParse.db;
Vdbe v;
int iDb; /* Database number to create the table in */
Token pName = new Token(); /* Unqualified name of the table to create */
/* The table or view name to create is passed to this routine via tokens
** pName1 and pName2. If the table name was fully qualified, for example:
**
** CREATE TABLE xxx.yyy (...);
**
** Then pName1 is set to "xxx" and pName2 "yyy". On the other hand if
** the table name is not fully qualified, i.e.:
**
** CREATE TABLE yyy(...);
**
** Then pName1 is set to "yyy" and pName2 is "".
**
** The call below sets the pName pointer to point at the token (pName1 or
** pName2) that stores the unqualified table name. The variable iDb is
** set to the index of the database that the table or view is to be
** created in.
*/
iDb = sqlite3TwoPartName(pParse, pName1, pName2, ref pName);
if (iDb < 0)
return;
if (0 == OMIT_TEMPDB && isTemp != 0 && pName2.n > 0 && iDb != 1)
{
/* If creating a temp table, the name may not be qualified. Unless
** the database name is "temp" anyway. */
sqlite3ErrorMsg(pParse, "temporary table name must be unqualified");
return;
}
if (OMIT_TEMPDB == 0 && isTemp != 0)
iDb = 1;
pParse.sNameToken = pName;
zName = sqlite3NameFromToken(db, pName);
if (zName == null)
return;
if (SQLITE_OK != sqlite3CheckObjectName(pParse, zName))
{
goto begin_table_error;
}
if (db.init.iDb == 1)
isTemp = 1;
#if !SQLITE_OMIT_AUTHORIZATION
Debug.Assert( (isTemp & 1)==isTemp );
{
int code;
string zDb = db.aDb[iDb].zName;
if( sqlite3AuthCheck(pParse, SQLITE_INSERT, SCHEMA_TABLE(isTemp), 0, zDb) ){
goto begin_table_error;
}
if( isView ){
if( OMIT_TEMPDB ==0&& isTemp ){
code = SQLITE_CREATE_TEMP_VIEW;
}else{
code = SQLITE_CREATE_VIEW;
}
}else{
if( OMIT_TEMPDB ==0&& isTemp ){
code = SQLITE_CREATE_TEMP_TABLE;
}else{
code = SQLITE_CREATE_TABLE;
}
}
if( null==isVirtual && sqlite3AuthCheck(pParse, code, zName, 0, zDb) ){
goto begin_table_error;
}
}
#endif
/* Make sure the new table name does not collide with an existing
** index or table name in the same database. Issue an error message if
** it does. The exception is if the statement being parsed was passed
** to an sqlite3_declare_vtab() call. In that case only the column names
** and types will be used, so there is no need to test for namespace
** collisions.
*/
if (!IN_DECLARE_VTAB(pParse))
{
String zDb = db.aDb[iDb].zName;
if (SQLITE_OK != sqlite3ReadSchema(pParse))
{
goto begin_table_error;
}
pTable = sqlite3FindTable(db, zName, zDb);
if (pTable != null)
{
if (noErr == 0)
{
sqlite3ErrorMsg(pParse, "table %T already exists", pName);
}
else
{
Debug.Assert(0 == db.init.busy);
sqlite3CodeVerifySchema(pParse, iDb);
}
goto begin_table_error;
}
if (sqlite3FindIndex(db, zName, zDb) != null)
{
sqlite3ErrorMsg(pParse, "there is already an index named %s", zName);
goto begin_table_error;
}
}
pTable = new Table();// sqlite3DbMallocZero(db, Table).Length;
//if ( pTable == null )
//{
// db.mallocFailed = 1;
// pParse.rc = SQLITE_NOMEM;
// pParse.nErr++;
// goto begin_table_error;
//}
pTable.zName = zName;
pTable.iPKey = -1;