Many hyperlinks are disabled.
Use anonymous login
to enable hyperlinks.
Overview
| Comment: | Enable SELECT query planning tracing when compiled with SQLITE_ENABLE_SELECTTRACE and either SQLITE_DEBUG or SQLITE_TEST. |
|---|---|
| Downloads: | Tarball | ZIP archive | SQL archive |
| Timelines: | family | ancestors | descendants | both | select-trace |
| Files: | files | file ages | folders |
| SHA1: |
cbe0cf9ddf46f0a678c85d49bfa74e3b |
| User & Date: | drh 2014-09-20 18:18:33 |
Context
|
2014-09-20
| ||
| 20:24 | Fix the SELECTTRACE_ENABLE macro so that it doesn't cause problems for testfixture. Add new SELECTTRACE() calls. check-in: f1ba68f1 user: drh tags: select-trace | |
| 18:18 | Enable SELECT query planning tracing when compiled with SQLITE_ENABLE_SELECTTRACE and either SQLITE_DEBUG or SQLITE_TEST. check-in: cbe0cf9d user: drh tags: select-trace | |
| 00:35 | Fix the usage of the _GNU_SOURCE and _BSD_SOURCE macros in the main internal header file, sqliteInt.h. Set HAVE_STRCHRNUL to 1 by default on Linux only. check-in: 59e2c9df user: drh tags: trunk | |
Changes
Changes to src/parse.y.
455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 |
A = pRhs;
}
%type multiselect_op {int}
multiselect_op(A) ::= UNION(OP). {A = @OP;}
multiselect_op(A) ::= UNION ALL. {A = TK_ALL;}
multiselect_op(A) ::= EXCEPT|INTERSECT(OP). {A = @OP;}
%endif SQLITE_OMIT_COMPOUND_SELECT
oneselect(A) ::= SELECT distinct(D) selcollist(W) from(X) where_opt(Y)
groupby_opt(P) having_opt(Q) orderby_opt(Z) limit_opt(L). {
A = sqlite3SelectNew(pParse,W,X,Y,P,Q,Z,D,L.pLimit,L.pOffset);
}
oneselect(A) ::= values(X). {A = X;}
%type values {Select*}
%destructor values {sqlite3SelectDelete(pParse->db, $$);}
values(A) ::= VALUES LP nexprlist(X) RP. {
A = sqlite3SelectNew(pParse,X,0,0,0,0,0,SF_Values,0,0);
|
| > > > > > > > > > > > > > > > > > > > > > > > > |
455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 |
A = pRhs;
}
%type multiselect_op {int}
multiselect_op(A) ::= UNION(OP). {A = @OP;}
multiselect_op(A) ::= UNION ALL. {A = TK_ALL;}
multiselect_op(A) ::= EXCEPT|INTERSECT(OP). {A = @OP;}
%endif SQLITE_OMIT_COMPOUND_SELECT
oneselect(A) ::= SELECT(S) distinct(D) selcollist(W) from(X) where_opt(Y)
groupby_opt(P) having_opt(Q) orderby_opt(Z) limit_opt(L). {
A = sqlite3SelectNew(pParse,W,X,Y,P,Q,Z,D,L.pLimit,L.pOffset);
#if SELECTTRACE_ENABLED
/* Populate the Select.zSelLabel[] string that is used to help with
** query planner debugging, to differentiate between multiple Select
** objects in a complex query.
**
** If the SELECT keyword is immediately followed by a C-style comment
** then extract the first few alphanumeric characters from within that
** comment to be the zSelLabel value. Otherwise, the label is #N where
** is an integer that is incremented with each SELECT statement seen.
*/
if( A!=0 ){
const char *z = S.z+6;
int i;
sqlite3_snprintf(sizeof(A->zSelLabel), A->zSelLabel, "#%d",
++pParse->nSelect);
while( z[0]==' ' ) z++;
if( z[0]=='/' && z[1]=='*' ){
z += 2;
while( z[0]==' ' ) z++;
for(i=0; sqlite3Isalnum(z[i]); i++){}
sqlite3_snprintf(sizeof(A->zSelLabel), A->zSelLabel, "%.*s", i, z);
}
}
#endif /* SELECTRACE_ENABLED */
}
oneselect(A) ::= values(X). {A = X;}
%type values {Select*}
%destructor values {sqlite3SelectDelete(pParse->db, $$);}
values(A) ::= VALUES LP nexprlist(X) RP. {
A = sqlite3SelectNew(pParse,X,0,0,0,0,0,SF_Values,0,0);
|
Changes to src/select.c.
9
10
11
12
13
14
15
16
17
18
19
20
21
22
....
3351
3352
3353
3354
3355
3356
3357
3358
3359
3360
3361
3362
3363
3364
|
** May you share freely, never taking more than you give.
**
*************************************************************************
** This file contains C code routines that are called by the parser
** to handle SELECT statements in SQLite.
*/
#include "sqliteInt.h"
/*
** An instance of the following object is used to record information about
** how to process the DISTINCT keyword, to simplify passing that information
** into the selectInnerLoop() routine.
*/
typedef struct DistinctCtx DistinctCtx;
................................................................................
for(ii=0; ii<p->pOrderBy->nExpr; ii++){
if( p->pOrderBy->a[ii].u.x.iOrderByCol==0 ) return 0;
}
}
}
/***** If we reach this point, flattening is permitted. *****/
/* Authorize the subquery */
pParse->zAuthContext = pSubitem->zName;
TESTONLY(i =) sqlite3AuthCheck(pParse, SQLITE_SELECT, 0, 0, 0);
testcase( i==SQLITE_DENY );
pParse->zAuthContext = zSavedAuthContext;
|
>
>
>
>
>
>
>
>
>
>
>
>
>
|
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
....
3362
3363
3364
3365
3366
3367
3368
3369
3370
3371
3372
3373
3374
3375
3376
3377
|
** May you share freely, never taking more than you give. ** ************************************************************************* ** This file contains C code routines that are called by the parser ** to handle SELECT statements in SQLite. */ #include "sqliteInt.h" /* ** Trace output macros */ #if SELECTTRACE_ENABLED /***/ int sqlite3SelectTrace = 0; # define SELECTTRACE(K,X) if(sqlite3SelectTrace&(K)) sqlite3DebugPrintf X #else # define SELECTTRACE(K,X) #endif /* ** An instance of the following object is used to record information about ** how to process the DISTINCT keyword, to simplify passing that information ** into the selectInnerLoop() routine. */ typedef struct DistinctCtx DistinctCtx; ................................................................................ for(ii=0; ii<p->pOrderBy->nExpr; ii++){ if( p->pOrderBy->a[ii].u.x.iOrderByCol==0 ) return 0; } } } /***** If we reach this point, flattening is permitted. *****/ SELECTTRACE(1, ("flatten %s (term %d) into %s\n", pSub->zSelLabel, iFrom, p->zSelLabel)); /* Authorize the subquery */ pParse->zAuthContext = pSubitem->zName; TESTONLY(i =) sqlite3AuthCheck(pParse, SQLITE_SELECT, 0, 0, 0); testcase( i==SQLITE_DENY ); pParse->zAuthContext = zSavedAuthContext; |
Changes to src/shell.c.
3096 3097 3098 3099 3100 3101 3102 3103 3104 3105 3106 3107 3108 3109 |
}else if( rc != SQLITE_OK ){
fprintf(stderr,"Error: querying schema information\n");
rc = 1;
}else{
rc = 0;
}
}else
#ifdef SQLITE_DEBUG
/* Undocumented commands for internal testing. Subject to change
** without notice. */
if( c=='s' && n>=10 && strncmp(azArg[0], "selftest-", 9)==0 ){
if( strncmp(azArg[0]+9, "boolean", n-9)==0 ){
int i, v;
|
> > > > > > > > > |
3096 3097 3098 3099 3100 3101 3102 3103 3104 3105 3106 3107 3108 3109 3110 3111 3112 3113 3114 3115 3116 3117 3118 |
}else if( rc != SQLITE_OK ){
fprintf(stderr,"Error: querying schema information\n");
rc = 1;
}else{
rc = 0;
}
}else
#if defined(SQLITE_DEBUG) && defined(SQLITE_ENABLE_SELECTTRACE)
if( c=='s' && n==11 && strncmp(azArg[0], "selecttrace", n)==0 ){
extern int sqlite3SelectTrace;
sqlite3SelectTrace = nArg>=2 ? booleanValue(azArg[1]) : 0xff;
}else
#endif
#ifdef SQLITE_DEBUG
/* Undocumented commands for internal testing. Subject to change
** without notice. */
if( c=='s' && n>=10 && strncmp(azArg[0], "selftest-", 9)==0 ){
if( strncmp(azArg[0]+9, "boolean", n-9)==0 ){
int i, v;
|
Changes to src/sqliteInt.h.
702 703 704 705 706 707 708 709 710 711 712 713 714 715 .... 2296 2297 2298 2299 2300 2301 2302 2303 2304 2305 2306 2307 2308 2309 .... 2554 2555 2556 2557 2558 2559 2560 2561 2562 2563 2564 2565 2566 2567 |
# define SQLITE_ENABLE_STAT3_OR_STAT4 1 #elif SQLITE_ENABLE_STAT3 # define SQLITE_ENABLE_STAT3_OR_STAT4 1 #elif SQLITE_ENABLE_STAT3_OR_STAT4 # undef SQLITE_ENABLE_STAT3_OR_STAT4 #endif /* ** An instance of the following structure is used to store the busy-handler ** callback for a given sqlite handle. ** ** The sqlite.busyHandler member of the sqlite struct contains the busy ** callback for the database handle. Each pager opened via the sqlite ** handle is passed a pointer to sqlite.busyHandler. The busy-handler ................................................................................ ** sequences for the ORDER BY clause. */ struct Select { ExprList *pEList; /* The fields of the result */ u8 op; /* One of: TK_UNION TK_ALL TK_INTERSECT TK_EXCEPT */ u16 selFlags; /* Various SF_* values */ int iLimit, iOffset; /* Memory registers holding LIMIT & OFFSET counters */ int addrOpenEphm[2]; /* OP_OpenEphem opcodes related to this select */ u64 nSelectRow; /* Estimated number of result rows */ SrcList *pSrc; /* The FROM clause */ Expr *pWhere; /* The WHERE clause */ ExprList *pGroupBy; /* The GROUP BY clause */ Expr *pHaving; /* The HAVING clause */ ExprList *pOrderBy; /* The ORDER BY clause */ ................................................................................ Token constraintName;/* Name of the constraint currently being parsed */ yDbMask writeMask; /* Start a write transaction on these databases */ yDbMask cookieMask; /* Bitmask of schema verified databases */ int cookieValue[SQLITE_MAX_ATTACHED+2]; /* Values of cookies to verify */ int regRowid; /* Register holding rowid of CREATE TABLE entry */ int regRoot; /* Register holding root page number for new objects */ int nMaxArg; /* Max args passed to user function by sub-program */ #ifndef SQLITE_OMIT_SHARED_CACHE int nTableLock; /* Number of locks in aTableLock */ TableLock *aTableLock; /* Required table locks for shared-cache mode */ #endif AutoincInfo *pAinc; /* Information about AUTOINCREMENT counters */ /* Information used while coding trigger programs. */ |
> > > > > > > > > > > > > > > > > |
702 703 704 705 706 707 708 709 710 711 712 713 714 715 716 717 718 719 720 721 722 723 724 725 726 .... 2307 2308 2309 2310 2311 2312 2313 2314 2315 2316 2317 2318 2319 2320 2321 2322 2323 .... 2568 2569 2570 2571 2572 2573 2574 2575 2576 2577 2578 2579 2580 2581 2582 2583 2584 |
# define SQLITE_ENABLE_STAT3_OR_STAT4 1 #elif SQLITE_ENABLE_STAT3 # define SQLITE_ENABLE_STAT3_OR_STAT4 1 #elif SQLITE_ENABLE_STAT3_OR_STAT4 # undef SQLITE_ENABLE_STAT3_OR_STAT4 #endif /* ** SELECTTRACE_ENABLED will be either 1 or 0 depending on whether or not ** the Select query generator tracing logic is turned on. */ #if defined(SQLITE_DEBUG) \ && (defined(SQLITE_TEST) || defined(SQLITE_ENABLE_SELECTTRACE)) # define SELECTTRACE_ENABLED 1 #else # define SELECTTRACE_ENABLED 0 #endif /* ** An instance of the following structure is used to store the busy-handler ** callback for a given sqlite handle. ** ** The sqlite.busyHandler member of the sqlite struct contains the busy ** callback for the database handle. Each pager opened via the sqlite ** handle is passed a pointer to sqlite.busyHandler. The busy-handler ................................................................................ ** sequences for the ORDER BY clause. */ struct Select { ExprList *pEList; /* The fields of the result */ u8 op; /* One of: TK_UNION TK_ALL TK_INTERSECT TK_EXCEPT */ u16 selFlags; /* Various SF_* values */ int iLimit, iOffset; /* Memory registers holding LIMIT & OFFSET counters */ #if SELECTTRACE_ENABLED char zSelLabel[12]; /* Text in comment following SELECT keyword */ #endif int addrOpenEphm[2]; /* OP_OpenEphem opcodes related to this select */ u64 nSelectRow; /* Estimated number of result rows */ SrcList *pSrc; /* The FROM clause */ Expr *pWhere; /* The WHERE clause */ ExprList *pGroupBy; /* The GROUP BY clause */ Expr *pHaving; /* The HAVING clause */ ExprList *pOrderBy; /* The ORDER BY clause */ ................................................................................ Token constraintName;/* Name of the constraint currently being parsed */ yDbMask writeMask; /* Start a write transaction on these databases */ yDbMask cookieMask; /* Bitmask of schema verified databases */ int cookieValue[SQLITE_MAX_ATTACHED+2]; /* Values of cookies to verify */ int regRowid; /* Register holding rowid of CREATE TABLE entry */ int regRoot; /* Register holding root page number for new objects */ int nMaxArg; /* Max args passed to user function by sub-program */ #if SELECTTRACE_ENABLED int nSelect; /* Number of SELECT statements seen */ #endif #ifndef SQLITE_OMIT_SHARED_CACHE int nTableLock; /* Number of locks in aTableLock */ TableLock *aTableLock; /* Required table locks for shared-cache mode */ #endif AutoincInfo *pAinc; /* Information about AUTOINCREMENT counters */ /* Information used while coding trigger programs. */ |