/*
** Routines to implement min() and max() aggregate functions.
*/
static void minmaxStep(
sqlite3_context *context,
int NotUsed,
sqlite3_value **argv
){
Mem *pArg = (Mem *)argv[0];
Mem *pBest;
UNUSED_PARAMETER(NotUsed);
if( sqlite3_value_type(argv[0])==SQLITE_NULL ) return;
pBest = (Mem *)sqlite3_aggregate_context(context, sizeof(*pBest));
if( !pBest ) return;
if( pBest->flags ){
int max;
int cmp;
CollSeq *pColl = sqlite3GetFuncCollSeq(context);
/* This step function is used for both the min() and max() aggregates,
** the only difference between the two being that the sense of the
** comparison is inverted. For the max() aggregate, the
** sqlite3_user_data() function returns (void *)-1. For min() it
** returns (void *)db, where db is the sqlite3* database pointer.
** Therefore the next statement sets variable 'max' to 1 for the max()
** aggregate, or 0 for min().
*/
max = sqlite3_user_data(context)!=0;
cmp = sqlite3MemCompare(pBest, pArg, pColl);
if( (max && cmp<0) || (!max && cmp>0) ){
sqlite3VdbeMemCopy(pBest, pArg);
}
}else{
sqlite3VdbeMemCopy(pBest, pArg);
}
}
/*
** Bind a blob value to an SQL statement variable.
*/
int sqlite3_bind_blob(
sqlite3_stmt *pStmt,
int i,
const void *zData,
int nData,
void (*xDel)(void*)
){
return bindText(pStmt, i, zData, nData, xDel, 0);
}
int sqlite3_bind_double(sqlite3_stmt *pStmt, int i, double rValue){
int rc;
Vdbe *p = (Vdbe *)pStmt;
rc = vdbeUnbind(p, i);
if( rc==SQLITE_OK ){
sqlite3VdbeMemSetDouble(&p->aVar[i-1], rValue);
}
return rc;
}
int sqlite3_bind_int(sqlite3_stmt *p, int i, int iValue){
return sqlite3_bind_int64(p, i, (i64)iValue);
}
int sqlite3_bind_int64(sqlite3_stmt *pStmt, int i, sqlite_int64 iValue){
int rc;
Vdbe *p = (Vdbe *)pStmt;
rc = vdbeUnbind(p, i);
if( rc==SQLITE_OK ){
sqlite3VdbeMemSetInt64(&p->aVar[i-1], iValue);
}
return rc;
}
int sqlite3_bind_null(sqlite3_stmt* p, int i){
return vdbeUnbind((Vdbe *)p, i);
}
int sqlite3_bind_text(
sqlite3_stmt *pStmt,
int i,
const char *zData,
int nData,
void (*xDel)(void*)
){
return bindText(pStmt, i, zData, nData, xDel, SQLITE_UTF8);
}
#ifndef SQLITE_OMIT_UTF16
int sqlite3_bind_text16(
sqlite3_stmt *pStmt,
int i,
const void *zData,
int nData,
void (*xDel)(void*)
){
return bindText(pStmt, i, zData, nData, xDel, SQLITE_UTF16NATIVE);
}
#endif /* SQLITE_OMIT_UTF16 */
int sqlite3_bind_value(sqlite3_stmt *pStmt, int i, const sqlite3_value *pValue){
int rc;
Vdbe *p = (Vdbe *)pStmt;
rc = vdbeUnbind(p, i);
if( rc==SQLITE_OK ){
sqlite3VdbeMemCopy(&p->aVar[i-1], pValue);
}
return rc;
}
/*
** This function is used to allocate and populate UnpackedRecord
** structures intended to be compared against sample index keys stored
** in the sqlite_stat4 table.
**
** A single call to this function attempts to populates field iVal (leftmost
** is 0 etc.) of the unpacked record with a value extracted from expression
** pExpr. Extraction of values is possible if:
**
** * (pExpr==0). In this case the value is assumed to be an SQL NULL,
**
** * The expression is a bound variable, and this is a reprepare, or
**
** * The sqlite3ValueFromExpr() function is able to extract a value
** from the expression (i.e. the expression is a literal value).
**
** If a value can be extracted, the affinity passed as the 5th argument
** is applied to it before it is copied into the UnpackedRecord. Output
** parameter *pbOk is set to true if a value is extracted, or false
** otherwise.
**
** When this function is called, *ppRec must either point to an object
** allocated by an earlier call to this function, or must be NULL. If it
** is NULL and a value can be successfully extracted, a new UnpackedRecord
** is allocated (and *ppRec set to point to it) before returning.
**
** Unless an error is encountered, SQLITE_OK is returned. It is not an
** error if a value cannot be extracted from pExpr. If an error does
** occur, an SQLite error code is returned.
*/
SQLITE_PRIVATE int sqlite3Stat4ProbeSetValue(
Parse *pParse, /* Parse context */
Index *pIdx, /* Index being probed */
UnpackedRecord **ppRec, /* IN/OUT: Probe record */
Expr *pExpr, /* The expression to extract a value from */
u8 affinity, /* Affinity to use */
int iVal, /* Array element to populate */
int *pbOk /* OUT: True if value was extracted */
){
int rc = SQLITE_OK;
sqlite3_value *pVal = 0;
sqlite3 *db = pParse->db;
struct ValueNewStat4Ctx alloc;
alloc.pParse = pParse;
alloc.pIdx = pIdx;
alloc.ppRec = ppRec;
alloc.iVal = iVal;
/* Skip over any TK_COLLATE nodes */
pExpr = sqlite3ExprSkipCollate(pExpr);
if( !pExpr ){
pVal = valueNew(db, &alloc);
if( pVal ){
sqlite3VdbeMemSetNull((Mem*)pVal);
*pbOk = 1;
}
}else if( pExpr->op==TK_VARIABLE
|| (pExpr->op==TK_REGISTER && pExpr->op2==TK_VARIABLE)
){
Vdbe *v;
int iBindVar = pExpr->iColumn;
sqlite3VdbeSetVarmask(pParse->pVdbe, iBindVar);
if( (v = pParse->pReprepare)!=0 ){
pVal = valueNew(db, &alloc);
if( pVal ){
rc = sqlite3VdbeMemCopy((Mem*)pVal, &v->aVar[iBindVar-1]);
if( rc==SQLITE_OK ){
sqlite3ValueApplyAffinity(pVal, affinity, ENC(db));
}
pVal->db = pParse->db;
*pbOk = 1;
sqlite3VdbeMemStoreType((Mem*)pVal);
}
}else{
*pbOk = 0;
}
}else{
rc = valueFromExpr(db, pExpr, ENC(db), affinity, &pVal, &alloc);
*pbOk = (pVal!=0);
}
assert( pVal==0 || pVal->db==db );
return rc;
}
/*
** Bind a blob value to an SQL statement variable.
*/
int sqlite3_bind_blob(
sqlite3_stmt *pStmt,
int i,
const void *zData,
int nData,
void (*xDel)(void*)
){
return bindText(pStmt, i, zData, nData, xDel, 0);
}
int sqlite3_bind_double(sqlite3_stmt *pStmt, int i, double rValue){
int rc;
Vdbe *p = (Vdbe *)pStmt;
sqlite3_mutex_enter(p->db->mutex);
rc = vdbeUnbind(p, i);
if( rc==SQLITE_OK ){
sqlite3VdbeMemSetDouble(&p->aVar[i-1], rValue);
}
sqlite3_mutex_leave(p->db->mutex);
return rc;
}
int sqlite3_bind_int(sqlite3_stmt *p, int i, int iValue){
return sqlite3_bind_int64(p, i, (i64)iValue);
}
int sqlite3_bind_int64(sqlite3_stmt *pStmt, int i, sqlite_int64 iValue){
int rc;
Vdbe *p = (Vdbe *)pStmt;
sqlite3_mutex_enter(p->db->mutex);
rc = vdbeUnbind(p, i);
if( rc==SQLITE_OK ){
sqlite3VdbeMemSetInt64(&p->aVar[i-1], iValue);
}
sqlite3_mutex_leave(p->db->mutex);
return rc;
}
int sqlite3_bind_null(sqlite3_stmt *pStmt, int i){
int rc;
Vdbe *p = (Vdbe*)pStmt;
sqlite3_mutex_enter(p->db->mutex);
rc = vdbeUnbind(p, i);
sqlite3_mutex_leave(p->db->mutex);
return rc;
}
int sqlite3_bind_text(
sqlite3_stmt *pStmt,
int i,
const char *zData,
int nData,
void (*xDel)(void*)
){
return bindText(pStmt, i, zData, nData, xDel, SQLITE_UTF8);
}
#ifndef SQLITE_OMIT_UTF16
int sqlite3_bind_text16(
sqlite3_stmt *pStmt,
int i,
const void *zData,
int nData,
void (*xDel)(void*)
){
return bindText(pStmt, i, zData, nData, xDel, SQLITE_UTF16NATIVE);
}
#endif /* SQLITE_OMIT_UTF16 */
int sqlite3_bind_value(sqlite3_stmt *pStmt, int i, const sqlite3_value *pValue){
int rc;
Vdbe *p = (Vdbe *)pStmt;
sqlite3_mutex_enter(p->db->mutex);
rc = vdbeUnbind(p, i);
if( rc==SQLITE_OK ){
rc = sqlite3VdbeMemCopy(&p->aVar[i-1], pValue);
if( rc==SQLITE_OK ){
rc = sqlite3VdbeChangeEncoding(&p->aVar[i-1], ENC(p->db));
}
}
rc = sqlite3ApiExit(p->db, rc);
sqlite3_mutex_leave(p->db->mutex);
return rc;
}
/* noop */
}else{
xDel((void*)p);
}
if( pCtx ) sqlite3_result_error_toobig(pCtx);
return SQLITE_TOOBIG;
}
void sqlite3_result_blob(
sqlite3_context *pCtx,
const void *z,
int n,
void (*xDel)(void *)
){
assert( n>=0 );
assert( sqlite3_mutex_held(pCtx->pOut->db->mutex) );
setResultStrOrError(pCtx, z, n, 0, xDel);
}
void sqlite3_result_blob64(
sqlite3_context *pCtx,
const void *z,
sqlite3_uint64 n,
void (*xDel)(void *)
){
assert( sqlite3_mutex_held(pCtx->pOut->db->mutex) );
assert( xDel!=SQLITE_DYNAMIC );
if( n>0x7fffffff ){
(void)invokeValueDestructor(z, xDel, pCtx);
}else{
setResultStrOrError(pCtx, z, (int)n, 0, xDel);
}
}
void sqlite3_result_double(sqlite3_context *pCtx, double rVal){
assert( sqlite3_mutex_held(pCtx->pOut->db->mutex) );
sqlite3VdbeMemSetDouble(pCtx->pOut, rVal);
}
void sqlite3_result_error(sqlite3_context *pCtx, const char *z, int n){
assert( sqlite3_mutex_held(pCtx->pOut->db->mutex) );
pCtx->isError = SQLITE_ERROR;
pCtx->fErrorOrAux = 1;
sqlite3VdbeMemSetStr(pCtx->pOut, z, n, SQLITE_UTF8, SQLITE_TRANSIENT);
}
#ifndef SQLITE_OMIT_UTF16
void sqlite3_result_error16(sqlite3_context *pCtx, const void *z, int n){
assert( sqlite3_mutex_held(pCtx->pOut->db->mutex) );
pCtx->isError = SQLITE_ERROR;
pCtx->fErrorOrAux = 1;
sqlite3VdbeMemSetStr(pCtx->pOut, z, n, SQLITE_UTF16NATIVE, SQLITE_TRANSIENT);
}
#endif
void sqlite3_result_int(sqlite3_context *pCtx, int iVal){
assert( sqlite3_mutex_held(pCtx->pOut->db->mutex) );
sqlite3VdbeMemSetInt64(pCtx->pOut, (i64)iVal);
}
void sqlite3_result_int64(sqlite3_context *pCtx, i64 iVal){
assert( sqlite3_mutex_held(pCtx->pOut->db->mutex) );
sqlite3VdbeMemSetInt64(pCtx->pOut, iVal);
}
void sqlite3_result_null(sqlite3_context *pCtx){
assert( sqlite3_mutex_held(pCtx->pOut->db->mutex) );
sqlite3VdbeMemSetNull(pCtx->pOut);
}
void sqlite3_result_text(
sqlite3_context *pCtx,
const char *z,
int n,
void (*xDel)(void *)
){
assert( sqlite3_mutex_held(pCtx->pOut->db->mutex) );
setResultStrOrError(pCtx, z, n, SQLITE_UTF8, xDel);
}
void sqlite3_result_text64(
sqlite3_context *pCtx,
const char *z,
sqlite3_uint64 n,
void (*xDel)(void *),
unsigned char enc
){
assert( sqlite3_mutex_held(pCtx->pOut->db->mutex) );
assert( xDel!=SQLITE_DYNAMIC );
if( enc==SQLITE_UTF16 ) enc = SQLITE_UTF16NATIVE;
if( n>0x7fffffff ){
(void)invokeValueDestructor(z, xDel, pCtx);
}else{
setResultStrOrError(pCtx, z, (int)n, enc, xDel);
}
}
#ifndef SQLITE_OMIT_UTF16
void sqlite3_result_text16(
sqlite3_context *pCtx,
const void *z,
int n,
void (*xDel)(void *)
){
assert( sqlite3_mutex_held(pCtx->pOut->db->mutex) );
setResultStrOrError(pCtx, z, n, SQLITE_UTF16NATIVE, xDel);
}
void sqlite3_result_text16be(
sqlite3_context *pCtx,
const void *z,
int n,
void (*xDel)(void *)
){
assert( sqlite3_mutex_held(pCtx->pOut->db->mutex) );
setResultStrOrError(pCtx, z, n, SQLITE_UTF16BE, xDel);
}
void sqlite3_result_text16le(
sqlite3_context *pCtx,
const void *z,
int n,
void (*xDel)(void *)
){
assert( sqlite3_mutex_held(pCtx->pOut->db->mutex) );
setResultStrOrError(pCtx, z, n, SQLITE_UTF16LE, xDel);
}
#endif /* SQLITE_OMIT_UTF16 */
void sqlite3_result_value(sqlite3_context *pCtx, sqlite3_value *pValue){
assert( sqlite3_mutex_held(pCtx->pOut->db->mutex) );
sqlite3VdbeMemCopy(pCtx->pOut, pValue);
}
/**************************** sqlite3_result_ *******************************
** The following routines are used by user-defined functions to specify
** the function result.
*/
void sqlite3_result_blob(
sqlite3_context *pCtx,
const void *z,
int n,
void (*xDel)(void *)
){
assert( n>=0 );
sqlite3VdbeMemSetStr(&pCtx->s, z, n, 0, xDel);
}
void sqlite3_result_double(sqlite3_context *pCtx, double rVal){
sqlite3VdbeMemSetDouble(&pCtx->s, rVal);
}
void sqlite3_result_error(sqlite3_context *pCtx, const char *z, int n){
pCtx->isError = 1;
sqlite3VdbeMemSetStr(&pCtx->s, z, n, SQLITE_UTF8, SQLITE_TRANSIENT);
}
#ifndef SQLITE_OMIT_UTF16
void sqlite3_result_error16(sqlite3_context *pCtx, const void *z, int n){
pCtx->isError = 1;
sqlite3VdbeMemSetStr(&pCtx->s, z, n, SQLITE_UTF16NATIVE, SQLITE_TRANSIENT);
}
#endif
void sqlite3_result_int(sqlite3_context *pCtx, int iVal){
sqlite3VdbeMemSetInt64(&pCtx->s, (i64)iVal);
}
void sqlite3_result_int64(sqlite3_context *pCtx, i64 iVal){
sqlite3VdbeMemSetInt64(&pCtx->s, iVal);
}
void sqlite3_result_null(sqlite3_context *pCtx){
sqlite3VdbeMemSetNull(&pCtx->s);
}
void sqlite3_result_text(
sqlite3_context *pCtx,
const char *z,
int n,
void (*xDel)(void *)
){
sqlite3VdbeMemSetStr(&pCtx->s, z, n, SQLITE_UTF8, xDel);
}
#ifndef SQLITE_OMIT_UTF16
void sqlite3_result_text16(
sqlite3_context *pCtx,
const void *z,
int n,
void (*xDel)(void *)
){
sqlite3VdbeMemSetStr(&pCtx->s, z, n, SQLITE_UTF16NATIVE, xDel);
}
void sqlite3_result_text16be(
sqlite3_context *pCtx,
const void *z,
int n,
void (*xDel)(void *)
){
sqlite3VdbeMemSetStr(&pCtx->s, z, n, SQLITE_UTF16BE, xDel);
}
void sqlite3_result_text16le(
sqlite3_context *pCtx,
const void *z,
int n,
void (*xDel)(void *)
){
sqlite3VdbeMemSetStr(&pCtx->s, z, n, SQLITE_UTF16LE, xDel);
}
#endif /* SQLITE_OMIT_UTF16 */
void sqlite3_result_value(sqlite3_context *pCtx, sqlite3_value *pValue){
sqlite3VdbeMemCopy(&pCtx->s, pValue);
}
/**************************** sqlite3_result_ *******************************
** The following routines are used by user-defined functions to specify
** the function result.
**
** The setStrOrError() funtion calls sqlite3VdbeMemSetStr() to store the
** result as a string or blob but if the string or blob is too large, it
** then sets the error code to SQLITE_TOOBIG
*/
static void setResultStrOrError(
sqlite3_context *pCtx, /* Function context */
const char *z, /* String pointer */
int n, /* Bytes in string, or negative */
u8 enc, /* Encoding of z. 0 for BLOBs */
void (*xDel)(void*) /* Destructor function */
){
if( sqlite3VdbeMemSetStr(&pCtx->s, z, n, enc, xDel)==SQLITE_TOOBIG ){
sqlite3_result_error_toobig(pCtx);
}
}
SQLITE_API void sqlite3_result_blob(
sqlite3_context *pCtx,
const void *z,
int n,
void (*xDel)(void *)
){
assert( n>=0 );
assert( sqlite3_mutex_held(pCtx->s.db->mutex) );
setResultStrOrError(pCtx, z, n, 0, xDel);
}
SQLITE_API void sqlite3_result_double(sqlite3_context *pCtx, double rVal){
assert( sqlite3_mutex_held(pCtx->s.db->mutex) );
sqlite3VdbeMemSetDouble(&pCtx->s, rVal);
}
SQLITE_API void sqlite3_result_error(sqlite3_context *pCtx, const char *z, int n){
assert( sqlite3_mutex_held(pCtx->s.db->mutex) );
pCtx->isError = SQLITE_ERROR;
pCtx->fErrorOrAux = 1;
sqlite3VdbeMemSetStr(&pCtx->s, z, n, SQLITE_UTF8, SQLITE_TRANSIENT);
}
#ifndef SQLITE_OMIT_UTF16
SQLITE_API void sqlite3_result_error16(sqlite3_context *pCtx, const void *z, int n){
assert( sqlite3_mutex_held(pCtx->s.db->mutex) );
pCtx->isError = SQLITE_ERROR;
pCtx->fErrorOrAux = 1;
sqlite3VdbeMemSetStr(&pCtx->s, z, n, SQLITE_UTF16NATIVE, SQLITE_TRANSIENT);
}
#endif
SQLITE_API void sqlite3_result_int(sqlite3_context *pCtx, int iVal){
assert( sqlite3_mutex_held(pCtx->s.db->mutex) );
sqlite3VdbeMemSetInt64(&pCtx->s, (i64)iVal);
}
SQLITE_API void sqlite3_result_int64(sqlite3_context *pCtx, i64 iVal){
assert( sqlite3_mutex_held(pCtx->s.db->mutex) );
sqlite3VdbeMemSetInt64(&pCtx->s, iVal);
}
SQLITE_API void sqlite3_result_null(sqlite3_context *pCtx){
assert( sqlite3_mutex_held(pCtx->s.db->mutex) );
sqlite3VdbeMemSetNull(&pCtx->s);
}
SQLITE_API void sqlite3_result_text(
sqlite3_context *pCtx,
const char *z,
int n,
void (*xDel)(void *)
){
assert( sqlite3_mutex_held(pCtx->s.db->mutex) );
setResultStrOrError(pCtx, z, n, SQLITE_UTF8, xDel);
}
#ifndef SQLITE_OMIT_UTF16
SQLITE_API void sqlite3_result_text16(
sqlite3_context *pCtx,
const void *z,
int n,
void (*xDel)(void *)
){
assert( sqlite3_mutex_held(pCtx->s.db->mutex) );
setResultStrOrError(pCtx, z, n, SQLITE_UTF16NATIVE, xDel);
}
SQLITE_API void sqlite3_result_text16be(
sqlite3_context *pCtx,
const void *z,
int n,
void (*xDel)(void *)
){
assert( sqlite3_mutex_held(pCtx->s.db->mutex) );
setResultStrOrError(pCtx, z, n, SQLITE_UTF16BE, xDel);
}
SQLITE_API void sqlite3_result_text16le(
sqlite3_context *pCtx,
const void *z,
int n,
void (*xDel)(void *)
){
assert( sqlite3_mutex_held(pCtx->s.db->mutex) );
setResultStrOrError(pCtx, z, n, SQLITE_UTF16LE, xDel);
}
#endif /* SQLITE_OMIT_UTF16 */
SQLITE_API void sqlite3_result_value(sqlite3_context *pCtx, sqlite3_value *pValue){
assert( sqlite3_mutex_held(pCtx->s.db->mutex) );
sqlite3VdbeMemCopy(&pCtx->s, pValue);
}
