Enhance the TreeView mechanism so that it shows the window function
data structures as part of the abstract syntax tree.
FossilOrigin-Name: a2c0e1bec0d8a6f982572c4c5a8166319b8db0fe586057f7900f0ab72af6554e
diff --git a/src/treeview.c b/src/treeview.c
index 970d85e..1ece76f 100644
--- a/src/treeview.c
+++ b/src/treeview.c
@@ -165,8 +165,23 @@
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);
@@ -216,6 +231,16 @@
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");
}
@@ -243,6 +268,83 @@
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.
*/
@@ -393,10 +495,17 @@
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",
@@ -405,8 +514,13 @@
sqlite3TreeViewLine(pView, "FUNCTION %Q", pExpr->u.zToken);
}
if( pFarg ){
- sqlite3TreeViewExprList(pView, pFarg, 0, 0);
+ sqlite3TreeViewExprList(pView, pFarg, pWin!=0, 0);
}
+#ifndef SQLITe_OMIT_WINDOWFUNC
+ if( pWin ){
+ sqlite3TreeViewWindow(pView, pWin, 0);
+ }
+#endif
break;
}
#ifndef SQLITE_OMIT_SUBQUERY