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Improved TreeView display of Window objects.

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Change the Window.eType field to Window.eFrmType to avoid confusion with
other "eType" values.

FossilOrigin-Name: ec2f207dedb223077bbd3e4584499250eb12219712c917e930acccfa2c46e23b
This commit is contained in:
drh
2019-03-28 13:03:41 +00:00
parent a2b6806b3e
commit fc15f4c528
5 changed files with 77 additions and 37 deletions
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8
src/sqliteInt.h
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@@ -3535,7 +3535,7 @@ struct TreeView {
#endif /* SQLITE_DEBUG */
/*
** This object is used in varioius ways, all related to window functions
** This object is used in various 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.
@@ -3550,18 +3550,18 @@ struct TreeView {
** 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.
** to be accessible in two different ways. Use case (3) are separate objects.
*/
struct Window {
char *zName; /* Name of window (may be NULL) */
char *zBase; /* Name of base window for chaining (may be NULL) */
ExprList *pPartition; /* PARTITION BY clause */
ExprList *pOrderBy; /* ORDER BY clause */
u8 eType; /* TK_RANGE or TK_ROWS */
u8 eFrmType; /* TK_RANGE, TK_GROUPS, TK_ROWS, or 0 */
u8 eStart; /* UNBOUNDED, CURRENT, PRECEDING or FOLLOWING */
u8 eEnd; /* UNBOUNDED, CURRENT, PRECEDING or FOLLOWING */
u8 bImplicitFrame; /* True if frame was implicitly specified */
u8 eExclude;
u8 eExclude; /* TK_NO, TK_CURRENT, TK_TIES, TK_GROUP, or 0 */
Expr *pStart; /* Expression for "<expr> PRECEDING" */
Expr *pEnd; /* Expression for "<expr> FOLLOWING" */
Window *pNextWin; /* Next window function belonging to this SELECT */