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Overview
Comment: | Enhance the TreeView mechanism so that it shows the window function data structures as part of the abstract syntax tree. |
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Downloads: | Tarball | ZIP archive |
Timelines: | family | ancestors | descendants | both | trunk |
Files: | files | file ages | folders |
SHA3-256: |
a2c0e1bec0d8a6f982572c4c5a816631 |
User & Date: | drh 2018-07-10 06:32:53.781 |
Context
2018-07-10
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06:47 | Enhance the sqlite3ExprCompare() routine so that it knows to compare the OVER clause of window functions. (check-in: 0a7649afeb user: drh tags: trunk) | |
06:32 | Enhance the TreeView mechanism so that it shows the window function data structures as part of the abstract syntax tree. (check-in: a2c0e1bec0 user: drh tags: trunk) | |
05:11 | New VDBE comments and coverage macros. (check-in: a9a307265b user: drh tags: trunk) | |
Changes
Changes to src/sqliteInt.h.
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3486 3487 3488 3489 3490 3491 3492 | struct TreeView { int iLevel; /* Which level of the tree we are on */ u8 bLine[100]; /* Draw vertical in column i if bLine[i] is true */ }; #endif /* SQLITE_DEBUG */ /* | | > > > > | > > > > > > > > > > < < | | < < < | > | 3486 3487 3488 3489 3490 3491 3492 3493 3494 3495 3496 3497 3498 3499 3500 3501 3502 3503 3504 3505 3506 3507 3508 3509 3510 3511 3512 3513 3514 3515 3516 3517 3518 3519 3520 3521 3522 3523 3524 3525 3526 3527 3528 3529 3530 3531 3532 3533 3534 3535 | struct TreeView { int iLevel; /* Which level of the tree we are on */ u8 bLine[100]; /* Draw vertical in column i if bLine[i] is true */ }; #endif /* SQLITE_DEBUG */ /* ** This object is used in varioius ways, all related to window functions ** ** (1) A single instance of this structure is attached to the ** the Expr.pWin field for each window function in an expression tree. ** This object holds the information contained in the OVER clause, ** plus additional fields used during code generation. ** ** (2) All window functions in a single SELECT form a linked-list ** attached to Select.pWin. The Window.pFunc and Window.pExpr ** fields point back to the expression that is the window function. ** ** (3) The terms of the WINDOW clause of a SELECT are instances of this ** object on a linked list attached to Select.pWinDefn. ** ** The uses (1) and (2) are really the same Window object that just happens ** to be accessible in two different ways. Use (3) is are separate objects. */ struct Window { char *zName; /* Name of window (may be NULL) */ ExprList *pPartition; /* PARTITION BY clause */ ExprList *pOrderBy; /* ORDER BY clause */ u8 eType; /* TK_RANGE or TK_ROWS */ u8 eStart; /* UNBOUNDED, CURRENT, PRECEDING or FOLLOWING */ u8 eEnd; /* UNBOUNDED, CURRENT, PRECEDING or FOLLOWING */ Expr *pStart; /* Expression for "<expr> PRECEDING" */ Expr *pEnd; /* Expression for "<expr> FOLLOWING" */ Window *pNextWin; /* Next window function belonging to this SELECT */ Expr *pFilter; /* The FILTER expression */ FuncDef *pFunc; /* The function */ int iEphCsr; /* Temp table used by this window */ int regAccum; int regResult; int csrApp; /* Function cursor (used by min/max) */ int regApp; /* Function register (also used by min/max) */ int regPart; /* First in a set of registers holding PARTITION BY ** and ORDER BY values for the window */ Expr *pOwner; /* Expression object this window is attached to */ int nBufferCol; /* Number of columns in buffer table */ int iArgCol; /* Offset of first argument for this function */ }; #ifndef SQLITE_OMIT_WINDOWFUNC void sqlite3WindowDelete(sqlite3*, Window*); |
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3751 3752 3753 3754 3755 3756 3757 3758 3759 3760 3761 3762 3763 3764 | #if defined(SQLITE_DEBUG) void sqlite3TreeViewExpr(TreeView*, const Expr*, u8); void sqlite3TreeViewBareExprList(TreeView*, const ExprList*, const char*); void sqlite3TreeViewExprList(TreeView*, const ExprList*, u8, const char*); void sqlite3TreeViewSelect(TreeView*, const Select*, u8); void sqlite3TreeViewWith(TreeView*, const With*, u8); #endif void sqlite3SetString(char **, sqlite3*, const char*); void sqlite3ErrorMsg(Parse*, const char*, ...); void sqlite3Dequote(char*); void sqlite3TokenInit(Token*,char*); | > > > > | 3761 3762 3763 3764 3765 3766 3767 3768 3769 3770 3771 3772 3773 3774 3775 3776 3777 3778 | #if defined(SQLITE_DEBUG) void sqlite3TreeViewExpr(TreeView*, const Expr*, u8); void sqlite3TreeViewBareExprList(TreeView*, const ExprList*, const char*); void sqlite3TreeViewExprList(TreeView*, const ExprList*, u8, const char*); void sqlite3TreeViewSelect(TreeView*, const Select*, u8); void sqlite3TreeViewWith(TreeView*, const With*, u8); #ifndef SQLITE_OMIT_WINDOWFUNC void sqlite3TreeViewWindow(TreeView*, const Window*, u8); void sqlite3TreeViewWinFunc(TreeView*, const Window*, u8); #endif #endif void sqlite3SetString(char **, sqlite3*, const char*); void sqlite3ErrorMsg(Parse*, const char*, ...); void sqlite3Dequote(char*); void sqlite3TokenInit(Token*,char*); |
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Changes to src/treeview.c.
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161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 | n = 0; if( p->pSrc && p->pSrc->nSrc ) n++; if( p->pWhere ) n++; if( p->pGroupBy ) n++; if( p->pHaving ) n++; if( p->pOrderBy ) n++; if( p->pLimit ) n++; } sqlite3TreeViewExprList(pView, p->pEList, (n--)>0, "result-set"); if( p->pSrc && p->pSrc->nSrc ){ int i; pView = sqlite3TreeViewPush(pView, (n--)>0); sqlite3TreeViewLine(pView, "FROM"); for(i=0; i<p->pSrc->nSrc; i++){ struct SrcList_item *pItem = &p->pSrc->a[i]; StrAccum x; | > > > > > > > > > > > > > > > | 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 | n = 0; if( p->pSrc && p->pSrc->nSrc ) n++; if( p->pWhere ) n++; if( p->pGroupBy ) n++; if( p->pHaving ) n++; if( p->pOrderBy ) n++; if( p->pLimit ) n++; #ifndef SQLITE_OMIT_WINDOWFUNC if( p->pWin ) n++; if( p->pWinDefn ) n++; #endif } sqlite3TreeViewExprList(pView, p->pEList, (n--)>0, "result-set"); #ifndef SQLITE_OMIT_WINDOWFUNC if( p->pWin ){ Window *pX; pView = sqlite3TreeViewPush(pView, (n--)>0); sqlite3TreeViewLine(pView, "window-functions"); for(pX=p->pWin; pX; pX=pX->pNextWin){ sqlite3TreeViewWinFunc(pView, pX, pX->pNextWin!=0); } sqlite3TreeViewPop(pView); } #endif if( p->pSrc && p->pSrc->nSrc ){ int i; pView = sqlite3TreeViewPush(pView, (n--)>0); sqlite3TreeViewLine(pView, "FROM"); for(i=0; i<p->pSrc->nSrc; i++){ struct SrcList_item *pItem = &p->pSrc->a[i]; StrAccum x; |
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212 213 214 215 216 217 218 219 220 221 222 223 224 225 | sqlite3TreeViewExprList(pView, p->pGroupBy, (n--)>0, "GROUPBY"); } if( p->pHaving ){ sqlite3TreeViewItem(pView, "HAVING", (n--)>0); sqlite3TreeViewExpr(pView, p->pHaving, 0); sqlite3TreeViewPop(pView); } if( p->pOrderBy ){ sqlite3TreeViewExprList(pView, p->pOrderBy, (n--)>0, "ORDERBY"); } if( p->pLimit ){ sqlite3TreeViewItem(pView, "LIMIT", (n--)>0); sqlite3TreeViewExpr(pView, p->pLimit->pLeft, p->pLimit->pRight!=0); if( p->pLimit->pRight ){ | > > > > > > > > > > | 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 | sqlite3TreeViewExprList(pView, p->pGroupBy, (n--)>0, "GROUPBY"); } if( p->pHaving ){ sqlite3TreeViewItem(pView, "HAVING", (n--)>0); sqlite3TreeViewExpr(pView, p->pHaving, 0); sqlite3TreeViewPop(pView); } #ifndef SQLITE_OMIT_WINDOWFUNC if( p->pWinDefn ){ Window *pX; sqlite3TreeViewItem(pView, "WINDOW", (n--)>0); for(pX=p->pWinDefn; pX; pX=pX->pNextWin){ sqlite3TreeViewWindow(pView, pX, pX->pNextWin!=0); } sqlite3TreeViewPop(pView); } #endif if( p->pOrderBy ){ sqlite3TreeViewExprList(pView, p->pOrderBy, (n--)>0, "ORDERBY"); } if( p->pLimit ){ sqlite3TreeViewItem(pView, "LIMIT", (n--)>0); sqlite3TreeViewExpr(pView, p->pLimit->pLeft, p->pLimit->pRight!=0); if( p->pLimit->pRight ){ |
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239 240 241 242 243 244 245 246 247 248 249 250 251 252 | sqlite3TreeViewItem(pView, zOp, 1); } p = p->pPrior; }while( p!=0 ); sqlite3TreeViewPop(pView); } /* ** Generate a human-readable explanation of an expression tree. */ void sqlite3TreeViewExpr(TreeView *pView, const Expr *pExpr, u8 moreToFollow){ const char *zBinOp = 0; /* Binary operator */ const char *zUniOp = 0; /* Unary operator */ char zFlgs[60]; | > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > | 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 | sqlite3TreeViewItem(pView, zOp, 1); } p = p->pPrior; }while( p!=0 ); sqlite3TreeViewPop(pView); } #ifndef SQLITE_OMIT_WINDOWFUNC /* ** Generate a description of starting or stopping bounds */ void sqlite3TreeViewBound( TreeView *pView, /* View context */ u8 eBound, /* UNBOUNDED, CURRENT, PRECEDING, FOLLOWING */ Expr *pExpr, /* Value for PRECEDING or FOLLOWING */ u8 moreToFollow /* True if more to follow */ ){ switch( eBound ){ case TK_UNBOUNDED: { sqlite3TreeViewItem(pView, "UNBOUNDED", moreToFollow); sqlite3TreeViewPop(pView); break; } case TK_CURRENT: { sqlite3TreeViewItem(pView, "CURRENT", moreToFollow); sqlite3TreeViewPop(pView); break; } case TK_PRECEDING: { sqlite3TreeViewItem(pView, "PRECEDING", moreToFollow); sqlite3TreeViewExpr(pView, pExpr, 0); sqlite3TreeViewPop(pView); break; } case TK_FOLLOWING: { sqlite3TreeViewItem(pView, "FOLLOWING", moreToFollow); sqlite3TreeViewExpr(pView, pExpr, 0); sqlite3TreeViewPop(pView); break; } } } #endif /* SQLITE_OMIT_WINDOWFUNC */ #ifndef SQLITE_OMIT_WINDOWFUNC /* ** Generate a human-readable explanation for a Window object */ void sqlite3TreeViewWindow(TreeView *pView, const Window *pWin, u8 more){ pView = sqlite3TreeViewPush(pView, more); if( pWin->zName ){ sqlite3TreeViewLine(pView, "OVER %s", pWin->zName); }else{ sqlite3TreeViewLine(pView, "OVER"); } if( pWin->pPartition ){ sqlite3TreeViewExprList(pView, pWin->pPartition, 1, "PARTITION-BY"); } if( pWin->pOrderBy ){ sqlite3TreeViewExprList(pView, pWin->pOrderBy, 1, "ORDER-BY"); } if( pWin->eType ){ sqlite3TreeViewItem(pView, pWin->eType==TK_RANGE ? "RANGE" : "ROWS", 0); sqlite3TreeViewBound(pView, pWin->eStart, pWin->pStart, 1); sqlite3TreeViewBound(pView, pWin->eEnd, pWin->pEnd, 0); sqlite3TreeViewPop(pView); } sqlite3TreeViewPop(pView); } #endif /* SQLITE_OMIT_WINDOWFUNC */ #ifndef SQLITE_OMIT_WINDOWFUNC /* ** Generate a human-readable explanation for a Window Function object */ void sqlite3TreeViewWinFunc(TreeView *pView, const Window *pWin, u8 more){ pView = sqlite3TreeViewPush(pView, more); sqlite3TreeViewLine(pView, "WINFUNC %s(%d)", pWin->pFunc->zName, pWin->pFunc->nArg); sqlite3TreeViewWindow(pView, pWin, 0); sqlite3TreeViewPop(pView); } #endif /* SQLITE_OMIT_WINDOWFUNC */ /* ** Generate a human-readable explanation of an expression tree. */ void sqlite3TreeViewExpr(TreeView *pView, const Expr *pExpr, u8 moreToFollow){ const char *zBinOp = 0; /* Binary operator */ const char *zUniOp = 0; /* Unary operator */ char zFlgs[60]; |
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389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 | sqlite3TreeViewExpr(pView, pExpr->pLeft, 0); break; } case TK_AGG_FUNCTION: case TK_FUNCTION: { ExprList *pFarg; /* List of function arguments */ if( ExprHasProperty(pExpr, EP_TokenOnly) ){ pFarg = 0; }else{ pFarg = pExpr->x.pList; } if( pExpr->op==TK_AGG_FUNCTION ){ sqlite3TreeViewLine(pView, "AGG_FUNCTION%d %Q", pExpr->op2, pExpr->u.zToken); }else{ sqlite3TreeViewLine(pView, "FUNCTION %Q", pExpr->u.zToken); } if( pFarg ){ | > > > > > > > | > > > > > | 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 508 509 510 511 512 513 514 515 516 517 518 519 520 521 522 523 524 525 526 527 528 529 530 | sqlite3TreeViewExpr(pView, pExpr->pLeft, 0); break; } case TK_AGG_FUNCTION: case TK_FUNCTION: { ExprList *pFarg; /* List of function arguments */ Window *pWin; if( ExprHasProperty(pExpr, EP_TokenOnly) ){ pFarg = 0; pWin = 0; }else{ pFarg = pExpr->x.pList; #ifndef SQLITE_OMIT_WINDOWFUNC pWin = pExpr->pWin; #else pWin = 0; #endif } if( pExpr->op==TK_AGG_FUNCTION ){ sqlite3TreeViewLine(pView, "AGG_FUNCTION%d %Q", pExpr->op2, pExpr->u.zToken); }else{ sqlite3TreeViewLine(pView, "FUNCTION %Q", pExpr->u.zToken); } if( pFarg ){ sqlite3TreeViewExprList(pView, pFarg, pWin!=0, 0); } #ifndef SQLITe_OMIT_WINDOWFUNC if( pWin ){ sqlite3TreeViewWindow(pView, pWin, 0); } #endif break; } #ifndef SQLITE_OMIT_SUBQUERY case TK_EXISTS: { sqlite3TreeViewLine(pView, "EXISTS-expr flags=0x%x", pExpr->flags); sqlite3TreeViewSelect(pView, pExpr->x.pSelect, 0); break; |
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