- C Fix\sVDBE\scoverage
- D 2025-07-02T17:43:59.873
-C Merge\sall\sthe\slatest\strunk\senhancements\sinto\sthe\sexists-to-join\sbranch.
-D 2024-07-31T23:46:10.492
++C Merge\sin\sthe\sexists-to-join\soptimization\sthat\shas\sbeen\smodified\nto\srelax\sthe\srequirement\sof\shaving\san\sindexed\sjoin\sconstraint.
++D 2025-07-02T20:46:02.299
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U drh
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# Remove this line to create a well-formed Fossil manifest.
- ff593a16d61cc5c588d1737deb822abb90b1759475a4cabfcf608978b1191487
-9084a4c8726a2c7ba1c381886e29c7b86121d531282be0d63d5988d84f6f448d
++1c1aef2b7feae29066d0330699ab634ef41f5b60cdcd479a60cb1a5409553138
int iEnd, /* Last member of pSrc->a[] to check */
const char *zCol, /* Name of the column we are looking for */
int *piTab, /* Write index of pSrc->a[] here */
-- int *piCol, /* Write index of pSrc->a[*piTab].pTab->aCol[] here */
++ int *piCol, /* Write index of pSrc->a[*piTab].pSTab->aCol[] here */
int bIgnoreHidden /* Ignore hidden columns */
){
int i; /* For looping over tables in pSrc */
** complete, since there may still exist Expr.pTab entries that
** refer to the subquery even after flattening. Ticket #3346.
**
-- ** pSubitem->pTab is always non-NULL by test restrictions and tests above.
++ ** pSubitem->pSTab is always non-NULL by test restrictions and tests above.
*/
- if( ALWAYS(pSubitem->pTab!=0) ){
- Table *pTabToDel = pSubitem->pTab;
+ if( ALWAYS(pSubitem->pSTab!=0) ){
+ Table *pTabToDel = pSubitem->pSTab;
if( pTabToDel->nTabRef==1 ){
Parse *pToplevel = sqlite3ParseToplevel(pParse);
sqlite3ParserAddCleanup(pToplevel, sqlite3DeleteTableGeneric, pTabToDel);
** CTE expression, through routine checks to see if the reference is
** a recursive reference to the CTE.
**
--** If pFrom matches a CTE according to either of these two above, pFrom->pTab
++** If pFrom matches a CTE according to either of these two above, pFrom->pSTab
** and other fields are populated accordingly.
**
** Return 0 if no match is found.
return 1;
}
-/*
-** sqlite3WalkExpr() callback used by exprReferencesTable().
-*/
-static int exprReferencesTableExprCb(Walker *pWalker, Expr *pExpr){
- if( pExpr->op==TK_COLUMN && pExpr->iTable==pWalker->u.iCur ){
- pWalker->eCode = 1;
- }
- return WRC_Continue;
-}
-
-/*
-** Return true if the expression passed as the first argument refers
-** to cursor number iCur. Otherwise return false.
-*/
-static int exprReferencesTable(Expr *pExpr, int iCur){
- Walker w;
- memset(&w, 0, sizeof(w));
- w.u.iCur = iCur;
- w.xExprCallback = exprReferencesTableExprCb;
- w.xSelectCallback = sqlite3SelectWalkNoop;
- sqlite3WalkExpr(&w, pExpr);
- return w.eCode;
-}
-
-/*
-** Index pIdx is a UNIQUE index on the table accessed by cursor number
-** iCsr. This function returns a mask of the index columns that are
-** constrained to match a single, non-NULL value by the WHERE clause
-** passed as the 4th argument. For example, if the index is:
-**
-** CREATE UNIQUE INDEX idx ON tbl(a, b, c);
-**
-** and pWhere:
-**
-** WHERE a=? AND c=?
-**
-** then this function returns 5.
-*/
-static u64 findConstIdxTerms(
- Parse *pParse,
- int iCsr,
- Index *pIdx,
- Expr *pWhere
-){
- u64 m = 0;
- if( pWhere->op==TK_AND ){
- m = findConstIdxTerms(pParse, iCsr, pIdx, pWhere->pLeft);
- m |= findConstIdxTerms(pParse, iCsr, pIdx, pWhere->pRight);
- }else if( pWhere->op==TK_EQ ){
- Expr *pLeft = sqlite3ExprSkipCollateAndLikely(pWhere->pLeft);
- Expr *pRight = sqlite3ExprSkipCollateAndLikely(pWhere->pRight);
- if( pRight->op==TK_COLUMN && pRight->iTable==iCsr ){
- SWAP(Expr*, pLeft, pRight);
- }
- if( pLeft->op==TK_COLUMN
- && pLeft->iTable==iCsr
- && exprReferencesTable(pRight, iCsr)==0
- ){
- if( pIdx ){
- int ii;
- for(ii=0; ii<pIdx->nKeyCol; ii++){
- assert( pIdx->azColl[ii] );
- if( pLeft->iColumn==pIdx->aiColumn[ii] ){
- CollSeq *pColl = sqlite3ExprCompareCollSeq(pParse, pWhere);
- if( pColl && sqlite3StrICmp(pColl->zName, pIdx->azColl[ii])==0 ){
- m |= ((u64)1 << ii);
- break;
- }
- }
- }
- }else{
- if( pLeft->iColumn<0 ) m = 1;
- }
- }
- }
- return m;
-}
-
+ /*
+ ** Argument pWhere is the WHERE clause belonging to SELECT statement p. This
+ ** function attempts to transform expressions of the form:
+ **
+ ** EXISTS (SELECT ...)
+ **
+ ** into joins. For example, given
+ **
+ ** CREATE TABLE sailors(sid INTEGER PRIMARY KEY, name TEXT);
+ ** CREATE TABLE reserves(sid INT, day DATE, PRIMARY KEY(sid, day));
+ **
+ ** SELECT name FROM sailors AS S WHERE EXISTS (
+ ** SELECT * FROM reserves AS R WHERE S.sid = R.sid AND R.day = '2022-10-25'
+ ** );
+ **
+ ** the SELECT statement may be transformed as follows:
+ **
+ ** SELECT name FROM sailors AS S, reserves AS R
+ ** WHERE S.sid = R.sid AND R.day = '2022-10-25';
+ */
-static void existsToJoin(Parse *pParse, Select *p, Expr *pWhere){
++static SQLITE_NOINLINE void existsToJoin(
++ Parse *pParse,
++ Select *p,
++ Expr *pWhere
++){
+ if( pWhere
+ && !ExprHasProperty(pWhere, EP_OuterON|EP_InnerON)
+ && p->pSrc->nSrc>0
+ && p->pSrc->nSrc<BMS
+ && pParse->db->mallocFailed==0
+ ){
+ if( pWhere->op==TK_AND ){
+ Expr *pRight = pWhere->pRight;
+ existsToJoin(pParse, p, pWhere->pLeft);
+ existsToJoin(pParse, p, pRight);
+ }
+ else if( pWhere->op==TK_EXISTS ){
+ Select *pSub = pWhere->x.pSelect;
+ if( pSub->pSrc->nSrc==1
+ && (pSub->selFlags & (SF_Aggregate|SF_Correlated))==SF_Correlated
+ && pSub->pWhere
+ ){
- int bTransform = 0; /* True if EXISTS can be made into join */
- Table *pTab = pSub->pSrc->a[0].pTab;
- int iCsr = pSub->pSrc->a[0].iCursor;
- Index *pIdx;
- if( HasRowid(pTab) && findConstIdxTerms(pParse, iCsr, 0,pSub->pWhere) ){
- bTransform = 1;
- }
- for(pIdx=pTab->pIndex; pIdx && bTransform==0; pIdx=pIdx->pNext){
- if( pIdx->onError && pIdx->nKeyCol<=63 ){
- u64 c = findConstIdxTerms(pParse, iCsr, pIdx, pSub->pWhere);
- if( c==((u64)1 << pIdx->nKeyCol)-1 ){
- bTransform = 1;
- }
- }
- }
- if( bTransform ){
- memset(pWhere, 0, sizeof(*pWhere));
- pWhere->op = TK_INTEGER;
- pWhere->u.iValue = 1;
- ExprSetProperty(pWhere, EP_IntValue);
-
- assert( p->pWhere!=0 );
- p->pSrc = sqlite3SrcListAppendList(pParse, p->pSrc, pSub->pSrc);
- p->pWhere = sqlite3PExpr(pParse, TK_AND, p->pWhere, pSub->pWhere);
-
- pSub->pWhere = 0;
- pSub->pSrc = 0;
- sqlite3ParserAddCleanup(pParse, sqlite3SelectDeleteGeneric, pSub);
++ memset(pWhere, 0, sizeof(*pWhere));
++ pWhere->op = TK_INTEGER;
++ pWhere->u.iValue = 1;
++ ExprSetProperty(pWhere, EP_IntValue);
++
++ assert( p->pWhere!=0 );
++ pSub->pSrc->a[0].fg.fromExists = 1;
++ pSub->pSrc->a[0].fg.jointype |= JT_CROSS;
++ p->pSrc = sqlite3SrcListAppendList(pParse, p->pSrc, pSub->pSrc);
++ p->pWhere = sqlite3PExpr(pParse, TK_AND, p->pWhere, pSub->pWhere);
++
++ pSub->pWhere = 0;
++ pSub->pSrc = 0;
++ sqlite3ParserAddCleanup(pParse, sqlite3SelectDeleteGeneric, pSub);
+ #if TREETRACE_ENABLED
- if( sqlite3TreeTrace & 0x100000 ){
- TREETRACE(0x100000,pParse,p,
- ("After EXISTS-to-JOIN optimization:\n"));
- sqlite3TreeViewSelect(0, p, 0);
- }
-#endif
++ if( sqlite3TreeTrace & 0x100000 ){
++ TREETRACE(0x100000,pParse,p,
++ ("After EXISTS-to-JOIN optimization:\n"));
++ sqlite3TreeViewSelect(0, p, 0);
+ }
++#endif
+ }
+ }
+ }
+ }
+
/*
-** Generate code for the SELECT statement given in the p argument.
+** Generate byte-code for the SELECT statement given in the p argument.
**
** The results are returned according to the SelectDest structure.
** See comments in sqliteInt.h for further information.
}
#endif
+ /* If there may be an "EXISTS (SELECT ...)" in the WHERE clause, attempt
+ ** to change it into a join. */
+ if( pParse->bHasExists && OptimizationEnabled(db,SQLITE_ExistsToJoin) ){
+ existsToJoin(pParse, p, p->pWhere);
+ pTabList = p->pSrc;
+ }
+
/* Do the WHERE-clause constant propagation optimization if this is
- ** a join. No need to speed time on this operation for non-join queries
+ ** a join. No need to spend time on this operation for non-join queries
** as the equivalent optimization will be handled by query planner in
- ** sqlite3WhereBegin().
+ ** sqlite3WhereBegin(). tag-select-0330
*/
if( p->pWhere!=0
&& p->pWhere->op==TK_AND
** 0x00020000 Transform DISTINCT into GROUP BY
** 0x00040000 SELECT tree dump after all code has been generated
** 0x00080000 NOT NULL strength reduction
-** 0x00100000 EXISTS-to-JOIN optimization
+** 0x00100000 Pointers are all shown as zero
++** 0x00200000 EXISTS-to-JOIN optimization
*/
/*
#define SQLITE_Coroutines 0x02000000 /* Co-routines for subqueries */
#define SQLITE_NullUnusedCols 0x04000000 /* NULL unused columns in subqueries */
#define SQLITE_OnePass 0x08000000 /* Single-pass DELETE and UPDATE */
-#define SQLITE_ExistsToJoin 0x10000000 /* The EXISTS-to-JOIN optimization */
+#define SQLITE_OrderBySubq 0x10000000 /* ORDER BY in subquery helps outer */
+#define SQLITE_StarQuery 0x20000000 /* Heurists for star queries */
++#define SQLITE_ExistsToJoin 0x40000000 /* The EXISTS-to-JOIN optimization */
#define SQLITE_AllOpts 0xffffffff /* All optimizations */
/*
unsigned isSynthUsing :1; /* u3.pUsing is synthesized from NATURAL */
unsigned isNestedFrom :1; /* pSelect is a SF_NestedFrom subquery */
unsigned rowidUsed :1; /* The ROWID of this table is referenced */
+ unsigned fixedSchema :1; /* Uses u4.pSchema, not u4.zDatabase */
+ unsigned hadSchema :1; /* Had u4.zDatabase before u4.pSchema */
++ unsigned fromExists :1; /* Comes from WHERE EXISTS(...) */
} fg;
int iCursor; /* The VDBE cursor number used to access this table */
- union {
- Expr *pOn; /* fg.isUsing==0 => The ON clause of a join */
- IdList *pUsing; /* fg.isUsing==1 => The USING clause of a join */
- } u3;
Bitmask colUsed; /* Bit N set if column N used. Details above for N>62 */
union {
char *zIndexedBy; /* Identifier from "INDEXED BY <zIndex>" clause */
u8 disableLookaside; /* Number of times lookaside has been disabled */
u8 prepFlags; /* SQLITE_PREPARE_* flags */
u8 withinRJSubrtn; /* Nesting level for RIGHT JOIN body subroutines */
- u8 bHasWith; /* True if statement contains WITH */
+ u8 bHasExists; /* Has a correlated "EXISTS (SELECT ....)" expression */
u8 mSubrtnSig; /* mini Bloom filter on available SubrtnSig.selId */
+ u8 eTriggerOp; /* TK_UPDATE, TK_INSERT or TK_DELETE */
+ u8 bReturning; /* Coding a RETURNING trigger */
+ u8 eOrconf; /* Default ON CONFLICT policy for trigger steps */
+ u8 disableTriggers; /* True to disable triggers */
#if defined(SQLITE_DEBUG) || defined(SQLITE_COVERAGE_TEST)
u8 earlyCleanup; /* OOM inside sqlite3ParserAddCleanup() */
#endif
&& pProbe->hasStat1!=0
&& OptimizationEnabled(db, SQLITE_SkipScan)
&& pProbe->aiRowLogEst[saved_nEq+1]>=42 /* TUNING: Minimum for skip-scan */
++ && pSrc->fg.fromExists==0
&& (rc = whereLoopResize(db, pNew, pNew->nLTerm+1))==SQLITE_OK
){
LogEst nIter;
sqlite3VdbeAddOp2(v, OP_Goto, 1, pLevel->p2);
}
#endif /* SQLITE_DISABLE_SKIPAHEAD_DISTINCT */
++ if( pTabList->a[pLevel->iFrom].fg.fromExists ){
++ sqlite3VdbeAddOp2(v, OP_Goto, 0, sqlite3VdbeCurrentAddr(v)+2);
++ }
/* The common case: Advance to the next row */
if( pLevel->addrCont ) sqlite3VdbeResolveLabel(v, pLevel->addrCont);
sqlite3VdbeAddOp3(v, pLevel->op, pLevel->p1, pLevel->p2, pLevel->p3);
int isSearch; /* True for a SEARCH. False for SCAN. */
WhereLoop *pLoop; /* The controlling WhereLoop object */
u32 flags; /* Flags that describe this loop */
+#if defined(SQLITE_DEBUG) && !defined(SQLITE_OMIT_EXPLAIN)
char *zMsg; /* Text to add to EQP output */
+#endif
++ const char *zFormat;
StrAccum str; /* EQP output string */
char zBuf[100]; /* Initial space for EQP output string */
sqlite3StrAccumInit(&str, db, zBuf, sizeof(zBuf), SQLITE_MAX_LENGTH);
str.printfFlags = SQLITE_PRINTF_INTERNAL;
-- sqlite3_str_appendf(&str, "%s %S", isSearch ? "SEARCH" : "SCAN", pItem);
++ if( pItem->fg.fromExists ){
++ zFormat = "SINGLETON %S";
++ }else if( isSearch ){
++ zFormat = "SEARCH %S";
++ }else{
++ zFormat = "SCAN %S";
++ }
++ sqlite3_str_appendf(&str, zFormat, pItem);
if( (flags & (WHERE_IPK|WHERE_VIRTUALTABLE))==0 ){
const char *zFmt = 0;
Index *pIdx;
} {
QUERY PLAN
|--SCAN t1
-- `--CORRELATED SCALAR SUBQUERY xxxxxx
-- `--SCAN t2
++ `--SINGLETON t2
}
#-------------------------------------------------------------------------
--- /dev/null
-} {/SUBQUERY/}
+ # 2024 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.
+ #
+ #***********************************************************************
+ #
+
+ set testdir [file dirname $argv0]
+ source $testdir/tester.tcl
+ source $testdir/lock_common.tcl
+ set testprefix existsexpr
+
+
+ do_execsql_test 1.0 {
+ CREATE TABLE x1(a, b, PRIMARY KEY(a)) WITHOUT ROWID;
+ INSERT INTO x1 VALUES(1, 2), (3, 4), (5, 6);
+ CREATE INDEX x1b ON x1(b);
+
+ CREATE TABLE x2(x, y);
+ INSERT INTO x2 VALUES(1, 2), (3, 4), (5, 6);
+ }
+
+ do_execsql_test 1.1 {
+ SELECT 1 WHERE EXISTS (SELECT 1 FROM x1 WHERE a=5)
+ } {1}
+
+ do_execsql_test 1.2 {
+ SELECT * FROM x2 WHERE EXISTS (SELECT 1 FROM x1 WHERE a=x)
+ } {1 2 3 4 5 6}
+
+ # With "a=x", the UNIQUE index means the EXIST can be transformed to a join.
+ # So no "SUBQUERY". With "b=x", the index is not UNIQUE and so there is a
+ # "SUBQUERY".
+ do_execsql_test 1.3.1 {
+ EXPLAIN QUERY PLAN
+ SELECT * FROM x2 WHERE EXISTS (SELECT 1 FROM x1 WHERE a=x)
+ } {~/SUBQUERY/}
+ do_execsql_test 1.3.2 {
+ EXPLAIN QUERY PLAN
+ SELECT * FROM x2 WHERE EXISTS (SELECT 1 FROM x1 WHERE b=x)
-do_execsql_test 2.5 {
++} {~/SUBQUERY/}
+
+ do_execsql_test 1.4.1 {
+ EXPLAIN QUERY PLAN
+ SELECT * FROM x2 WHERE x=1 AND EXISTS (SELECT 1 FROM x1 WHERE a=x)
+ } {~/SUBQUERY/}
+ do_execsql_test 1.4.2 {
+ EXPLAIN QUERY PLAN
+ SELECT * FROM x2 WHERE EXISTS (SELECT 1 FROM x1 WHERE a=x) AND y=2
+ } {~/SUBQUERY/}
+
+ do_execsql_test 1.5 {
+ SELECT count(*) FROM x2 WHERE EXISTS (SELECT 1 FROM x1 WHERE a=x)
+ } {3}
+
+ #-------------------------------------------------------------------------
+ do_execsql_test 2.0 {
+ CREATE TABLE t1(a, b);
+ WITH s(i) AS (
+ SELECT 1 UNION ALL SELECT i+1 FROM s WHERE i<1000
+ ) INSERT INTO t1 SELECT i, i FROM s;
+
+ CREATE TABLE t2(c, d);
+ WITH s(i) AS (
+ SELECT 10 UNION ALL SELECT i+10 FROM s WHERE i<1000
+ ) INSERT INTO t2 SELECT i, i FROM s;
+ }
+
+ do_execsql_test 2.1 {
+ SELECT count(*) FROM t1;
+ SELECT count(*) FROM t2;
+ } {1000 100}
+
+ do_execsql_test 2.2 {
+ SELECT count(*) FROM t1, t2 WHERE a=c;
+ } {100}
+
+ do_execsql_test 2.3 {
+ SELECT count(*) FROM t1 WHERE EXISTS (SELECT 1 FROM t2 WHERE c=a)
+ } {100}
+ do_eqp_test 2.4 {
+ SELECT count(*) FROM t1 WHERE EXISTS (SELECT 1 FROM t2 WHERE c=a)
+ } {SCAN t1}
+
-} {SCAN t1*SEARCH t2}
++do_execsql_test 2.4.0 {
+ CREATE UNIQUE INDEX t2c ON t2(c);
+ CREATE UNIQUE INDEX t1a ON t1(a);
+ }
+
+ do_eqp_test 2.4.1 {
+ SELECT count(*) FROM t1 WHERE EXISTS (SELECT 1 FROM t2 WHERE c=a);
-} {SCAN t2*SEARCH t1}
++} {SCAN t1*SINGLETON t2}
+ do_execsql_test 2.4.2 {
+ ANALYZE;
+ }
+ do_eqp_test 2.4.3 {
+ SELECT count(*) FROM t1 WHERE EXISTS (SELECT 1 FROM t2 WHERE c=a);
-do_subquery_test 3.4 1 {
++} {SCAN t1*SINGLETON t2}
+ do_execsql_test 2.4.4 {
+ SELECT count(*) FROM t1 WHERE EXISTS (SELECT 1 FROM t2 WHERE c=a);
+ } {100}
+
+ do_execsql_test 2.5.1 {
+ EXPLAIN QUERY PLAN
+ SELECT count(*) FROM t1 WHERE EXISTS (SELECT 1 FROM t2 WHERE t2.rowid=a);
+ } {~/SUBQUERY/}
+
+ #-------------------------------------------------------------------------
+ proc do_subquery_test {tn bSub sql res} {
+ set r1(0) ~/SUBQUERY/
+ set r1(1) /SUBQUERY/
+ do_execsql_test $tn.1 "explain query plan $sql" $r1($bSub)
+ do_execsql_test $tn.2 $sql $res
+ }
+
+ do_execsql_test 3.0 {
+ CREATE TABLE y1(a, b, c);
+ CREATE TABLE y2(x, y, z);
+ CREATE UNIQUE INDEX y2zy ON y2(z, y);
+
+ INSERT INTO y1 VALUES(1, 1, 1);
+ INSERT INTO y1 VALUES(2, 2, 2);
+ INSERT INTO y1 VALUES(3, 3, 3);
+ INSERT INTO y1 VALUES(4, 4, 4);
+
+ INSERT INTO y2 VALUES(1, 1, 1);
+ INSERT INTO y2 VALUES(3, 3, 3);
+ }
+
+ do_subquery_test 3.1 0 {
+ SELECT * FROM y1 WHERE EXISTS (
+ SELECT 1 FROM y2 WHERE z=a AND y=b AND x=z
+ )
+ } {
+ 1 1 1 3 3 3
+ }
+
+ do_subquery_test 3.2 0 {
+ SELECT * FROM y1 WHERE EXISTS (
+ SELECT 1 FROM y2 WHERE z=max(a,b) AND y=min(b,a) AND x=z
+ )
+ } {
+ 1 1 1 3 3 3
+ }
+
+ do_subquery_test 3.3 0 {
+ SELECT * FROM y1 WHERE EXISTS (
+ SELECT 1 FROM y2 WHERE z=max(a,b) AND y=min(b,a) AND c!=3
+ )
+ } {
+ 1 1 1
+ }
+
-do_subquery_test 3.6 1 {
++do_subquery_test 3.4 0 {
+ SELECT * FROM y1 WHERE EXISTS (
+ SELECT 1 FROM y2 WHERE z=max(a,b) AND b=3
+ )
+ } {
+ 3 3 3
+ }
+
+ do_subquery_test 3.5 0 {
+ SELECT * FROM y1 WHERE EXISTS (
+ SELECT 1 FROM y2 WHERE z=a-1 AND y=a-1
+ )
+ } {
+ 2 2 2
+ 4 4 4
+ }
+
-do_subquery_test 4.2 1 {
++do_subquery_test 3.6 0 {
+ SELECT * FROM y1 WHERE EXISTS (
+ SELECT 1 FROM y2 WHERE z=a-1 AND y+1=a
+ )
+ } {
+ 2 2 2
+ 4 4 4
+ }
+
+ do_subquery_test 3.7 1 {
+ SELECT * FROM y1 WHERE EXISTS (
+ SELECT count(*) FROM y2 WHERE z=a-1 AND y=a-1
+ )
+ } {
+ 1 1 1
+ 2 2 2
+ 3 3 3
+ 4 4 4
+ }
+
+ do_subquery_test 3.8 1 {
+ SELECT * FROM y1 WHERE EXISTS ( SELECT a+1 FROM y2 )
+ } {
+ 1 1 1
+ 2 2 2
+ 3 3 3
+ 4 4 4
+ }
+
+ do_subquery_test 3.9 1 {
+ SELECT * FROM y1 WHERE EXISTS (
+ SELECT 1 FROM y2 one, y2 two WHERE one.z=a-1 AND one.y=a-1
+ )
+ } {
+ 2 2 2
+ 4 4 4
+ }
+
+ #-------------------------------------------------------------------------
+ reset_db
+ do_execsql_test 4.0 {
+ CREATE TABLE tx1(a TEXT COLLATE nocase, b TEXT);
+ CREATE UNIQUE INDEX tx1ab ON tx1(a, b);
+
+ INSERT INTO tx1 VALUES('a', 'a');
+ INSERT INTO tx1 VALUES('B', 'b');
+ INSERT INTO tx1 VALUES('c', 'c');
+ INSERT INTO tx1 VALUES('D', 'd');
+ INSERT INTO tx1 VALUES('e', 'e');
+
+ CREATE TABLE tx2(x, y);
+ INSERT INTO tx2 VALUES('A', 'a');
+ INSERT INTO tx2 VALUES('b', 'b');
+ INSERT INTO tx2 VALUES('C', 'c');
+ INSERT INTO tx2 VALUES('D', 'd');
+ }
+
+ do_subquery_test 4.1 0 {
+ SELECT * FROM tx2 WHERE EXISTS (
+ SELECT 1 FROM tx1 WHERE a=x AND b=y
+ )
+ } {
+ A a
+ b b
+ C c
+ D d
+ }
+
+ do_subquery_test 4.1.1 0 {
+ SELECT * FROM tx2 WHERE EXISTS (
+ SELECT 1 FROM tx1 WHERE (a COLLATE nocase)=x AND b=y
+ )
+ } {
+ A a b b C c D d
+ }
+ do_subquery_test 4.1.2 0 {
+ SELECT * FROM tx2 WHERE EXISTS (
+ SELECT 1 FROM tx1 WHERE a=x AND (b COLLATE binary)=y
+ )
+ } {
+ A a b b C c D d
+ }
+ do_subquery_test 4.1.1 0 {
+ SELECT * FROM tx2 WHERE EXISTS (
+ SELECT 1 FROM tx1 WHERE x=(a COLLATE nocase) AND b=y
+ )
+ } {
+ A a b b C c D d
+ }
+ do_subquery_test 4.1.2 0 {
+ SELECT * FROM tx2 WHERE EXISTS (
+ SELECT 1 FROM tx1 WHERE a=x AND y=(b COLLATE binary)
+ )
+ } {
+ A a b b C c D d
+ }
+
-do_subquery_test 4.4 1 {
++do_subquery_test 4.2 0 {
+ SELECT * FROM tx2 WHERE EXISTS (
+ SELECT 1 FROM tx1 WHERE a=x AND b=y COLLATE nocase
+ )
+ } {
+ A a
+ b b
+ C c
+ D d
+ }
+
+ do_execsql_test 4.3 {
+ DROP INDEX tx1ab;
+ CREATE UNIQUE INDEX tx1ab ON tx1(a COLLATE binary, b);
+ }
+
-do_subquery_test 5.6 1 "
++do_subquery_test 4.4 0 {
+ SELECT * FROM tx2 WHERE EXISTS (
+ SELECT 1 FROM tx1 WHERE a=x AND b=y
+ )
+ } {
+ A a
+ b b
+ C c
+ D d
+ }
+
+ do_subquery_test 4.4 0 {
+ SELECT * FROM tx2 WHERE EXISTS (
+ SELECT 1 FROM tx1 WHERE a=x COLLATE binary AND b=y
+ )
+ } {
+ D d
+ }
+
+ do_subquery_test 4.4 1 {
+ SELECT EXISTS ( SELECT x FROM tx1 ) FROM tx2
+ } {
+ 1 1 1 1
+ }
+
+ do_subquery_test 4.4 1 {
+ SELECT (SELECT EXISTS ( SELECT x FROM tx1 ) WHERE 1) FROM tx2
+ } {
+ 1 1 1 1
+ }
+
+ #-------------------------------------------------------------------------
+ proc cols {s f} {
+ set lCols [list]
+ for {set i $s} {$i<=$f} {incr i} {
+ lappend lCols [format "c%02d" $i]
+ }
+ join $lCols ", "
+ }
+ proc vals {n val} {
+ set lVal [list]
+ for {set i 0} {$i<$n} {incr i} {
+ lappend lVal $val
+ }
+ join $lVal ", "
+ }
+ proc exprs {s f} {
+ set lExpr [list]
+ for {set i $s} {$i<=$f} {incr i} {
+ lappend lExpr [format "c%02d = o" $i]
+ }
+ join $lExpr " AND "
+ }
+
+
+ do_execsql_test 5.0 "
+ CREATE TABLE a1( [cols 0 99] );
+ "
+ do_execsql_test 5.1 "
+ -- 63 column index
+ CREATE UNIQUE INDEX a1idx1 ON a1( [cols 0 62] );
+ "
+ do_execsql_test 5.2 "
+ -- 64 column index
+ CREATE UNIQUE INDEX a1idx2 ON a1( [cols 10 73] );
+ "
+ do_execsql_test 5.2 "
+ -- 65 column index
+ CREATE UNIQUE INDEX a1idx3 ON a1( [cols 20 84] );
+ "
+
+ do_test 5.3 {
+ foreach v {1 2 3 4 5 6} {
+ execsql "INSERT INTO a1 VALUES( [vals 100 $v] )"
+ }
+ } {}
+
+ do_execsql_test 5.4 {
+ CREATE TABLE a2(o);
+ INSERT INTO a2 VALUES(2), (5);
+ }
+
+ do_subquery_test 5.5 0 "
+ SELECT o FROM a2 WHERE EXISTS (
+ SELECT 1 FROM a1 WHERE [exprs 0 62]
+ )
+ " {
+ 2 5
+ }
+
-do_subquery_test 5.7 1 "
++do_subquery_test 5.6 0 "
+ SELECT o FROM a2 WHERE EXISTS (
+ SELECT 1 FROM a1 WHERE [exprs 10 73]
+ )
+ " {
+ 2 5
+ }
+
-
-
++do_subquery_test 5.7 0 "
+ SELECT o FROM a2 WHERE EXISTS (
+ SELECT 1 FROM a1 WHERE [exprs 20 84]
+ )
+ " {
+ 2 5
+ }
+
+ #-------------------------------------------------------------------------
+ reset_db
+ do_execsql_test 6.0 {
+ CREATE TABLE t1(a, b UNIQUE, c UNIQUE);
+ CREATE TABLE t2(a INfEGER PRIMARY KEY, b);
+ CREATE UNIQUE INDEX t2b ON t2(b);
+ }
+
+ do_catchsql_test 6.1 {
+ SELECT a FROM t1 WHERE EXISTS (SELECT 1 FROM t2 WHERE c COLLATE f = a)
+ } {1 {no such collation sequence: f}}
+
+ #-------------------------------------------------------------------------
+ reset_db
+ do_execsql_test 7.0 {
+ CREATE TABLE t1(x);
+ CREATE TABLE t2(y UNIQUE);
+
+ INSERT INTO t1 VALUES(1), (2);
+ INSERT INTO t2 VALUES(1), (3);
+
+ SELECT * FROM t1 one LEFT JOIN t1 two ON (one.x=two.x AND EXISTS (
+ SELECT 1 FROM t2 WHERE y=one.x
+ ));
+ } {
+ 1 1
+ 2 {}
+ }
+
+
+
+ finish_test
INSERT INTO t2(id,json) VALUES(4,'{"value":4}');
INSERT INTO t2(id,json) VALUES(5,'{"value":5}');
INSERT INTO t2(id,json) VALUES(6,'{"value":6}');
-- SELECT * FROM t1 CROSS JOIN t2
++ SELECT *, 'NL' FROM t1 CROSS JOIN t2
WHERE EXISTS(SELECT 1 FROM json_each(t1.json,'$.items') AS Z
WHERE Z.value==t2.id);
--} {1 {{"items":[3,5]}} 3 {{"value":3}} 1 {{"items":[3,5]}} 5 {{"value":5}}}
++} {1 {{"items":[3,5]}} 3 {{"value":3}} NL 1 {{"items":[3,5]}} 5 {{"value":5}} NL}
do_execsql_test json101-13.110 {
-- SELECT * FROM t2 CROSS JOIN t1
++ SELECT *, 'NL' FROM t2 CROSS JOIN t1
WHERE EXISTS(SELECT 1 FROM json_each(t1.json,'$.items') AS Z
WHERE Z.value==t2.id);
--} {3 {{"value":3}} 1 {{"items":[3,5]}} 5 {{"value":5}} 1 {{"items":[3,5]}}}
++} {3 {{"value":3}} 1 {{"items":[3,5]}} NL 5 {{"value":5}} 1 {{"items":[3,5]}} NL}
# 2018-05-16
# Incorrect fullkey output from json_each()
SELECT count(*) FROM t2 WHERE EXISTS(
SELECT 1 FROM t1 WHERE t1.a=450 AND t2.c IS NULL
)
--} +8000 {0}
++} 4000 {0}
#-------------------------------------------------------------------------
reset_db
projects / thirdparty / sqlite.git / commitdiff
