diff options
Diffstat (limited to 'src/sqliteInt.h')
| -rw-r--r-- | src/sqliteInt.h | 21 |
1 files changed, 21 insertions, 0 deletions
diff --git a/src/sqliteInt.h b/src/sqliteInt.h index 05bc6dd4c..8b9bdf474 100644 --- a/src/sqliteInt.h +++ b/src/sqliteInt.h @@ -1189,6 +1189,7 @@ typedef struct FuncDef FuncDef; typedef struct FuncDefHash FuncDefHash; typedef struct IdList IdList; typedef struct Index Index; +typedef struct IndexExpr IndexExpr; typedef struct IndexSample IndexSample; typedef struct KeyClass KeyClass; typedef struct KeyInfo KeyInfo; @@ -2616,6 +2617,7 @@ struct Index { unsigned bNoQuery:1; /* Do not use this index to optimize queries */ unsigned bAscKeyBug:1; /* True if the bba7b69f9849b5bf bug applies */ unsigned bHasVCol:1; /* Index references one or more VIRTUAL columns */ + unsigned bHasExpr:1; /* This is an index on an expression */ #ifdef SQLITE_ENABLE_STAT4 int nSample; /* Number of elements in aSample[] */ int nSampleCol; /* Size of IndexSample.anEq[] and so on */ @@ -3564,6 +3566,24 @@ struct TriggerPrg { #endif /* +** If there is an index on an expression in scope such that the value +** of the expression pExpr can be read out of the index with cursor iCur +** at column iCol, then an instance of this object records that fact. +** +** A linked list of these objects is attached to Parse and records all +** expressions that can be short-circuited by extracting a valid from +** an index. +*/ +struct IndexExpr { + Expr *pExpr; /* The expression contained in the index */ + int iDataCur; /* The data cursor associated with the index */ + int iIdxCur; /* The index cursor */ + int iIdxCol; /* The column of the index that contains pExpr */ + u8 bMaybeNullRow; /* True if we need an OP_IfNullRow check */ + IndexExpr *pIENext; /* Next in a list of all indexed expressions */ +}; + +/* ** An instance of the ParseCleanup object specifies an operation that ** should be performed after parsing to deallocation resources obtained ** during the parse and which are no longer needed. @@ -3621,6 +3641,7 @@ struct Parse { int nLabelAlloc; /* Number of slots in aLabel */ int *aLabel; /* Space to hold the labels */ ExprList *pConstExpr;/* Constant expressions */ + IndexExpr *pIdxExpr; /* List of all expression in active indexes */ Token constraintName;/* Name of the constraint currently being parsed */ yDbMask writeMask; /* Start a write transaction on these databases */ yDbMask cookieMask; /* Bitmask of schema verified databases */ |