Image-CCV
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ccv-src/lib/3rdparty/sqlite3/sqlite3.c view on Meta::CPAN
** selectively disable various optimizations.
*/
#define SQLITE_QueryFlattener 0x0001 /* Query flattening */
#define SQLITE_ColumnCache 0x0002 /* Column cache */
#define SQLITE_GroupByOrder 0x0004 /* GROUPBY cover of ORDERBY */
#define SQLITE_FactorOutConst 0x0008 /* Constant factoring */
#define SQLITE_IdxRealAsInt 0x0010 /* Store REAL as INT in indices */
#define SQLITE_DistinctOpt 0x0020 /* DISTINCT using indexes */
#define SQLITE_CoverIdxScan 0x0040 /* Covering index scans */
#define SQLITE_OrderByIdxJoin 0x0080 /* ORDER BY of joins via index */
#define SQLITE_SubqCoroutine 0x0100 /* Evaluate subqueries as coroutines */
#define SQLITE_Transitive 0x0200 /* Transitive constraints */
#define SQLITE_OmitNoopJoin 0x0400 /* Omit unused tables in joins */
#define SQLITE_Stat3 0x0800 /* Use the SQLITE_STAT3 table */
#define SQLITE_AdjustOutEst 0x1000 /* Adjust output estimates using WHERE */
#define SQLITE_AllOpts 0xffff /* All optimizations */
/*
** Macros for testing whether or not optimizations are enabled or disabled.
*/
#ifndef SQLITE_OMIT_BUILTIN_TEST
ccv-src/lib/3rdparty/sqlite3/sqlite3.c view on Meta::CPAN
VdbeComment((v, "Co-routine completion flag"));
sqlite3SelectDestInit(pDest, SRT_Coroutine, regYield);
j1 = sqlite3VdbeAddOp2(v, OP_Goto, 0, 0);
rc = sqlite3Select(pParse, pSelect, pDest);
assert( pParse->nErr==0 || rc );
if( pParse->db->mallocFailed && rc==SQLITE_OK ) rc = SQLITE_NOMEM;
if( rc ) return rc;
sqlite3VdbeAddOp2(v, OP_Integer, 1, regEof); /* EOF <- 1 */
sqlite3VdbeAddOp1(v, OP_Yield, regYield); /* yield X */
sqlite3VdbeAddOp2(v, OP_Halt, SQLITE_INTERNAL, OE_Abort);
VdbeComment((v, "End of coroutine"));
sqlite3VdbeJumpHere(v, j1); /* label B: */
return rc;
}
/* Forward declaration */
static int xferOptimization(
Parse *pParse, /* Parser context */
Table *pDest, /* The table we are inserting into */
ccv-src/lib/3rdparty/sqlite3/sqlite3.c view on Meta::CPAN
int nColumn; /* Number of columns in the data */
int nHidden = 0; /* Number of hidden columns if TABLE is virtual */
int iDataCur = 0; /* VDBE cursor that is the main data repository */
int iIdxCur = 0; /* First index cursor */
int ipkColumn = -1; /* Column that is the INTEGER PRIMARY KEY */
int endOfLoop; /* Label for the end of the insertion loop */
int useTempTable = 0; /* Store SELECT results in intermediate table */
int srcTab = 0; /* Data comes from this temporary cursor if >=0 */
int addrInsTop = 0; /* Jump to label "D" */
int addrCont = 0; /* Top of insert loop. Label "C" in templates 3 and 4 */
int addrSelect = 0; /* Address of coroutine that implements the SELECT */
SelectDest dest; /* Destination for SELECT on rhs of INSERT */
int iDb; /* Index of database holding TABLE */
Db *pDb; /* The database containing table being inserted into */
int appendFlag = 0; /* True if the insert is likely to be an append */
int withoutRowid; /* 0 for normal table. 1 for WITHOUT ROWID table */
/* Register allocations */
int regFromSelect = 0;/* Base register for data coming from SELECT */
int regAutoinc = 0; /* Register holding the AUTOINCREMENT counter */
int regRowCount = 0; /* Memory cell used for the row counter */
ccv-src/lib/3rdparty/sqlite3/sqlite3.c view on Meta::CPAN
**
** A temp table must be used if the table being updated is also one
** of the tables being read by the SELECT statement. Also use a
** temp table in the case of row triggers.
*/
if( pTrigger || readsTable(pParse, addrSelect, iDb, pTab) ){
useTempTable = 1;
}
if( useTempTable ){
/* Invoke the coroutine to extract information from the SELECT
** and add it to a transient table srcTab. The code generated
** here is from the 4th template:
**
** B: open temp table
** L: yield X
** if EOF goto M
** insert row from R..R+n into temp table
** goto L
** M: ...
*/
ccv-src/lib/3rdparty/sqlite3/sqlite3.c view on Meta::CPAN
multi_select_end:
pDest->iSdst = dest.iSdst;
pDest->nSdst = dest.nSdst;
sqlite3SelectDelete(db, pDelete);
return rc;
}
#endif /* SQLITE_OMIT_COMPOUND_SELECT */
/*
** Code an output subroutine for a coroutine implementation of a
** SELECT statment.
**
** The data to be output is contained in pIn->iSdst. There are
** pIn->nSdst columns to be output. pDest is where the output should
** be sent.
**
** regReturn is the number of the register holding the subroutine
** return address.
**
** If regPrev>0 then it is the first register in a vector that
ccv-src/lib/3rdparty/sqlite3/sqlite3.c view on Meta::CPAN
** Alternative compound select code generator for cases when there
** is an ORDER BY clause.
**
** We assume a query of the following form:
**
** <selectA> <operator> <selectB> ORDER BY <orderbylist>
**
** <operator> is one of UNION ALL, UNION, EXCEPT, or INTERSECT. The idea
** is to code both <selectA> and <selectB> with the ORDER BY clause as
** co-routines. Then run the co-routines in parallel and merge the results
** into the output. In addition to the two coroutines (called selectA and
** selectB) there are 7 subroutines:
**
** outA: Move the output of the selectA coroutine into the output
** of the compound query.
**
** outB: Move the output of the selectB coroutine into the output
** of the compound query. (Only generated for UNION and
** UNION ALL. EXCEPT and INSERTSECT never output a row that
** appears only in B.)
**
** AltB: Called when there is data from both coroutines and A<B.
**
** AeqB: Called when there is data from both coroutines and A==B.
**
** AgtB: Called when there is data from both coroutines and A>B.
**
** EofA: Called when data is exhausted from selectA.
**
** EofB: Called when data is exhausted from selectB.
**
** The implementation of the latter five subroutines depend on which
** <operator> is used:
**
**
** UNION ALL UNION EXCEPT INTERSECT
ccv-src/lib/3rdparty/sqlite3/sqlite3.c view on Meta::CPAN
** In the AltB, AeqB, and AgtB subroutines, an EOF on A following nextA
** causes an immediate jump to EofA and an EOF on B following nextB causes
** an immediate jump to EofB. Within EofA and EofB, and EOF on entry or
** following nextX causes a jump to the end of the select processing.
**
** Duplicate removal in the UNION, EXCEPT, and INTERSECT cases is handled
** within the output subroutine. The regPrev register set holds the previously
** output value. A comparison is made against this value and the output
** is skipped if the next results would be the same as the previous.
**
** The implementation plan is to implement the two coroutines and seven
** subroutines first, then put the control logic at the bottom. Like this:
**
** goto Init
** coA: coroutine for left query (A)
** coB: coroutine for right query (B)
** outA: output one row of A
** outB: output one row of B (UNION and UNION ALL only)
** EofA: ...
** EofB: ...
** AltB: ...
** AeqB: ...
** AgtB: ...
** Init: initialize coroutine registers
** yield coA
** if eof(A) goto EofA
** yield coB
** if eof(B) goto EofB
** Cmpr: Compare A, B
** Jump AltB, AeqB, AgtB
** End: ...
**
** We call AltB, AeqB, AgtB, EofA, and EofB "subroutines" but they are not
** actually called using Gosub and they do not Return. EofA and EofB loop
ccv-src/lib/3rdparty/sqlite3/sqlite3.c view on Meta::CPAN
*/
#ifndef SQLITE_OMIT_COMPOUND_SELECT
static int multiSelectOrderBy(
Parse *pParse, /* Parsing context */
Select *p, /* The right-most of SELECTs to be coded */
SelectDest *pDest /* What to do with query results */
){
int i, j; /* Loop counters */
Select *pPrior; /* Another SELECT immediately to our left */
Vdbe *v; /* Generate code to this VDBE */
SelectDest destA; /* Destination for coroutine A */
SelectDest destB; /* Destination for coroutine B */
int regAddrA; /* Address register for select-A coroutine */
int regEofA; /* Flag to indicate when select-A is complete */
int regAddrB; /* Address register for select-B coroutine */
int regEofB; /* Flag to indicate when select-B is complete */
int addrSelectA; /* Address of the select-A coroutine */
int addrSelectB; /* Address of the select-B coroutine */
int regOutA; /* Address register for the output-A subroutine */
int regOutB; /* Address register for the output-B subroutine */
int addrOutA; /* Address of the output-A subroutine */
int addrOutB = 0; /* Address of the output-B subroutine */
int addrEofA; /* Address of the select-A-exhausted subroutine */
int addrEofB; /* Address of the select-B-exhausted subroutine */
int addrAltB; /* Address of the A<B subroutine */
int addrAeqB; /* Address of the A==B subroutine */
int addrAgtB; /* Address of the A>B subroutine */
int regLimitA; /* Limit register for select-A */
ccv-src/lib/3rdparty/sqlite3/sqlite3.c view on Meta::CPAN
regAddrA = ++pParse->nMem;
regEofA = ++pParse->nMem;
regAddrB = ++pParse->nMem;
regEofB = ++pParse->nMem;
regOutA = ++pParse->nMem;
regOutB = ++pParse->nMem;
sqlite3SelectDestInit(&destA, SRT_Coroutine, regAddrA);
sqlite3SelectDestInit(&destB, SRT_Coroutine, regAddrB);
/* Jump past the various subroutines and coroutines to the main
** merge loop
*/
j1 = sqlite3VdbeAddOp0(v, OP_Goto);
addrSelectA = sqlite3VdbeCurrentAddr(v);
/* Generate a coroutine to evaluate the SELECT statement to the
** left of the compound operator - the "A" select.
*/
VdbeNoopComment((v, "Begin coroutine for left SELECT"));
pPrior->iLimit = regLimitA;
explainSetInteger(iSub1, pParse->iNextSelectId);
sqlite3Select(pParse, pPrior, &destA);
sqlite3VdbeAddOp2(v, OP_Integer, 1, regEofA);
sqlite3VdbeAddOp1(v, OP_Yield, regAddrA);
VdbeNoopComment((v, "End coroutine for left SELECT"));
/* Generate a coroutine to evaluate the SELECT statement on
** the right - the "B" select
*/
addrSelectB = sqlite3VdbeCurrentAddr(v);
VdbeNoopComment((v, "Begin coroutine for right SELECT"));
savedLimit = p->iLimit;
savedOffset = p->iOffset;
p->iLimit = regLimitB;
p->iOffset = 0;
explainSetInteger(iSub2, pParse->iNextSelectId);
sqlite3Select(pParse, p, &destB);
p->iLimit = savedLimit;
p->iOffset = savedOffset;
sqlite3VdbeAddOp2(v, OP_Integer, 1, regEofB);
sqlite3VdbeAddOp1(v, OP_Yield, regAddrB);
VdbeNoopComment((v, "End coroutine for right SELECT"));
/* Generate a subroutine that outputs the current row of the A
** select as the next output row of the compound select.
*/
VdbeNoopComment((v, "Output routine for A"));
addrOutA = generateOutputSubroutine(pParse,
p, &destA, pDest, regOutA,
regPrev, pKeyDup, labelEnd);
/* Generate a subroutine that outputs the current row of the B
ccv-src/lib/3rdparty/sqlite3/sqlite3.c view on Meta::CPAN
** been coded. Otherwise, the verify-schema would likely be coded as
** part of the co-routine. If the main routine then accessed the
** database before invoking the co-routine for the first time (for
** example to initialize a LIMIT register from a sub-select), it would
** be doing so without having verified the schema version and obtained
** the required db locks. See ticket d6b36be38. */
sqlite3CodeVerifySchema(pParse, -1);
sqlite3VdbeAddOp0(v, OP_Goto);
addrTop = sqlite3VdbeAddOp1(v, OP_OpenPseudo, pItem->iCursor);
sqlite3VdbeChangeP5(v, 1);
VdbeComment((v, "coroutine for %s", pItem->pTab->zName));
pItem->addrFillSub = addrTop;
sqlite3VdbeAddOp2(v, OP_Integer, 0, addrEof);
sqlite3VdbeChangeP5(v, 1);
sqlite3SelectDestInit(&dest, SRT_Coroutine, pItem->regReturn);
explainSetInteger(pItem->iSelectId, (u8)pParse->iNextSelectId);
sqlite3Select(pParse, pSub, &dest);
pItem->pTab->nRowEst = (unsigned)pSub->nSelectRow;
pItem->viaCoroutine = 1;
sqlite3VdbeChangeP2(v, addrTop, dest.iSdst);
sqlite3VdbeChangeP3(v, addrTop, dest.nSdst);
ccv-src/lib/ccv_internal.h view on Meta::CPAN
#define INTERNAL_EXPAND_MACRO_ARGUMENT_TO_LINE(...) INTERNAL_EXPAND_MACRO_ARGUMENT_TO_LINE_N(__VA_ARGS__)
#define INTERNAL_SEQ_PADDING_LINE() ,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,
#define ccv_declare_derived_signature_case(var, submacro, ...) \
submacro; \
uint64_t INTERNAL_CATCH_UNIQUE_NAME(_ccv_temp_sig_) = 0; \
INTERNAL_EXPAND_MACRO_ARGUMENT_TO_LINE(__VA_ARGS__, INTERNAL_SEQ_PADDING_LINE()); \
uint64_t var = INTERNAL_CATCH_UNIQUE_NAME(_ccv_temp_sig_);
/* the macros enable us to preserve state of the program at any point in a structure way, this is borrowed from coroutine idea */
#define ccv_function_state_reserve_field int line_no;
#define ccv_function_state_begin(reader, s, file) (reader)((file), &(s)); switch ((s).line_no) { case 0:;
#define ccv_function_state_resume(writer, s, file) do { (s).line_no = __LINE__; (writer)(&(s), (file)); case __LINE__:; } while (0)
#define ccv_function_state_finish() }
/* the factor used to provide higher accuracy in integer type (all integer computation in some cases) */
#define _ccv_get_32s_value(ptr, i, factor) (((int*)(ptr))[(i)] << factor)
#define _ccv_get_32f_value(ptr, i, factor) ((float*)(ptr))[(i)]
#define _ccv_get_64s_value(ptr, i, factor) (((int64_t*)(ptr))[(i)] << factor)
( run in 0.492 second using v1.01-cache-2.11-cpan-3cd7ad12f66 )