diff options
Diffstat (limited to 'src/sqliteInt.h')
| -rw-r--r-- | src/sqliteInt.h | 30 |
1 files changed, 28 insertions, 2 deletions
diff --git a/src/sqliteInt.h b/src/sqliteInt.h index 7fd71a86b..ea6ff1381 100644 --- a/src/sqliteInt.h +++ b/src/sqliteInt.h @@ -1137,6 +1137,7 @@ typedef struct Bitvec Bitvec; typedef struct CollSeq CollSeq; typedef struct Column Column; typedef struct Cte Cte; +typedef struct CteUse CteUse; typedef struct Db Db; typedef struct DbFixer DbFixer; typedef struct Schema Schema; @@ -2941,6 +2942,7 @@ struct SrcItem { unsigned viaCoroutine :1; /* Implemented as a co-routine */ unsigned isRecursive :1; /* True for recursive reference in WITH */ unsigned fromDDL :1; /* Comes from sqlite_schema */ + unsigned isCte :1; /* This is a CTE */ } fg; int iCursor; /* The VDBE cursor number used to access this table */ Expr *pOn; /* The ON clause of a join */ @@ -2950,7 +2952,10 @@ struct SrcItem { char *zIndexedBy; /* Identifier from "INDEXED BY <zIndex>" clause */ ExprList *pFuncArg; /* Arguments to table-valued-function */ } u1; - Index *pIBIndex; /* Index structure corresponding to u1.zIndexedBy */ + union { + Index *pIBIndex; /* Index structure corresponding to u1.zIndexedBy */ + CteUse *pCteUse; /* CTE Usage info info fg.isCte is true */ + } u2; }; /* @@ -3889,6 +3894,7 @@ struct Cte { ExprList *pCols; /* List of explicit column names, or NULL */ Select *pSelect; /* The definition of this CTE */ const char *zCteErr; /* Error message for circular references */ + CteUse *pUse; /* Usage information for this CTE */ }; /* @@ -3901,6 +3907,26 @@ struct With { Cte a[1]; /* For each CTE in the WITH clause.... */ }; +/* +** The Cte object is not guaranteed to persist for the entire duration +** of code generation. (The query flattener or other parser tree +** edits might delete it.) The following object records information +** about each Common Table Expression that must be preserved for the +** duration of the parse. +** +** The CteUse objects are freed using sqlite3ParserAddCleanup() rather +** than sqlite3SelectDelete(), which is what enables them to persist +** until the end of code generation. +*/ +struct CteUse { + int nUse; /* Number of users of this CTE */ + int addrM9e; /* Start of subroutine to compute materialization */ + int regRtn; /* Return address register for addrM9e subroutine */ + int iCur; /* Ephemeral table holding the materialization */ + LogEst nRowEst; /* Estimated number of rows in the table */ +}; + + #ifdef SQLITE_DEBUG /* ** An instance of the TreeView object is used for printing the content of @@ -4889,7 +4915,7 @@ sqlite3_int64 sqlite3StmtCurrentTime(sqlite3_context*); int sqlite3VdbeParameterIndex(Vdbe*, const char*, int); int sqlite3TransferBindings(sqlite3_stmt *, sqlite3_stmt *); void sqlite3ParserReset(Parse*); -void sqlite3ParserAddCleanup(Parse*,void(*)(sqlite3*,void*),void*); +void *sqlite3ParserAddCleanup(Parse*,void(*)(sqlite3*,void*),void*); #ifdef SQLITE_ENABLE_NORMALIZE char *sqlite3Normalize(Vdbe*, const char*); #endif |