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Add support for window functions row_number(), rank(), dense_rank() and

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percent_rank().

FossilOrigin-Name: 91c1cb7a217d0991a08256269f6c55ef185c25362d57b36bfbd2d85dab38e58f
This commit is contained in:
dan
2018-06-02 21:04:28 +00:00
parent f690b57206
commit dfa552f45b
9 changed files with 2069 additions and 274 deletions
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8
src/sqliteInt.h
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@@ -1584,7 +1584,7 @@ struct sqlite3 {
*/
struct FuncDef {
i8 nArg; /* Number of arguments. -1 means unlimited */
u16 funcFlags; /* Some combination of SQLITE_FUNC_* */
u32 funcFlags; /* Some combination of SQLITE_FUNC_* */
void *pUserData; /* User data parameter */
FuncDef *pNext; /* Next function with same name */
void (*xSFunc)(sqlite3_context*,int,sqlite3_value**); /* func or agg-step */
@@ -1647,6 +1647,8 @@ struct FuncDestructor {
** single query - might change over time */
#define SQLITE_FUNC_AFFINITY 0x4000 /* Built-in affinity() function */
#define SQLITE_FUNC_OFFSET 0x8000 /* Built-in sqlite_offset() function */
#define SQLITE_FUNC_WINDOW 0x10000 /* Built-in window-only function */
#define SQLITE_FUNC_WINDOW_SIZE 0x20000
/*
** The following three macros, FUNCTION(), LIKEFUNC() and AGGREGATE() are
@@ -3501,6 +3503,9 @@ void sqlite3WindowAttach(Parse*, Expr*, Window*);
int sqlite3WindowCompare(Parse*, Window*, Window*);
void sqlite3WindowCodeInit(Parse*, Window*);
void sqlite3WindowCodeStep(Parse*, Select*, WhereInfo*, int, int, int*);
int sqlite3WindowRewrite(Parse*, Select*);
int sqlite3ExpandSubquery(Parse*, struct SrcList_item*);
void sqlite3WindowUpdate(Parse*, Window*, FuncDef*);
/*
** Assuming zIn points to the first byte of a UTF-8 character,
@@ -4175,6 +4180,7 @@ extern sqlite3_uint64 sqlite3NProfileCnt;
void sqlite3RootPageMoved(sqlite3*, int, int, int);
void sqlite3Reindex(Parse*, Token*, Token*);
void sqlite3AlterFunctions(void);
void sqlite3WindowFunctions(void);
void sqlite3AlterRenameTable(Parse*, SrcList*, Token*);
int sqlite3GetToken(const unsigned char *, int *);
void sqlite3NestedParse(Parse*, const char*, ...);