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Add support for chaining of WINDOW definitions.

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FossilOrigin-Name: c155125fd5dddb438c09d40f5137c47d88defb7a6ede4261f09d7bdaad250d37
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dan
2019-02-16 17:27:51 +00:00
parent 9c7e44cddd
commit e7c9ca41b2
8 changed files with 1934 additions and 1346 deletions
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4
src/sqliteInt.h
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@@ -3555,11 +3555,13 @@ struct TreeView {
*/
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 eStart; /* UNBOUNDED, CURRENT, PRECEDING or FOLLOWING */
u8 eEnd; /* UNBOUNDED, CURRENT, PRECEDING or FOLLOWING */
u8 bImplicitFrame; /* True if frame was implicitly specified */
Expr *pStart; /* Expression for "<expr> PRECEDING" */
Expr *pEnd; /* Expression for "<expr> FOLLOWING" */
Window *pNextWin; /* Next window function belonging to this SELECT */
@@ -3591,6 +3593,8 @@ void sqlite3WindowUpdate(Parse*, Window*, Window*, FuncDef*);
Window *sqlite3WindowDup(sqlite3 *db, Expr *pOwner, Window *p);
Window *sqlite3WindowListDup(sqlite3 *db, Window *p);
void sqlite3WindowFunctions(void);
void sqlite3WindowChain(Parse*, Window*, Window*);
Window *sqlite3WindowAssemble(Parse*, Window*, ExprList*, ExprList*, Token*);
#else
# define sqlite3WindowDelete(a,b)
# define sqlite3WindowFunctions()