diff options
Diffstat (limited to 'src/vdbeInt.h')
| -rw-r--r-- | src/vdbeInt.h | 19 |
1 files changed, 19 insertions, 0 deletions
diff --git a/src/vdbeInt.h b/src/vdbeInt.h index 5f75caaf0..a56dedf6a 100644 --- a/src/vdbeInt.h +++ b/src/vdbeInt.h @@ -33,6 +33,9 @@ typedef unsigned char Bool; /* Opaque type used by code in vdbesort.c */ typedef struct VdbeSorter VdbeSorter; +/* Opaque type used by the explainer */ +typedef struct Explain Explain; + /* ** A cursor is a pointer into a single BTree within a database file. ** The cursor can seek to a BTree entry with a particular key, or @@ -258,6 +261,18 @@ struct sqlite3_context { }; /* +** An Explain object accumulates indented output which is helpful +** in describing recursive data structures. +*/ +struct Explain { + Vdbe *pVdbe; /* Attach the explanation to this Vdbe */ + StrAccum str; /* The string being accumulated */ + int nIndent; /* Number of elements in aIndent */ + u16 aIndent[100]; /* Levels of indentation */ + char zBase[100]; /* Initial space */ +}; + +/* ** An instance of the virtual machine. This structure contains the complete ** state of the virtual machine. ** @@ -323,6 +338,10 @@ struct Vdbe { #ifdef SQLITE_DEBUG FILE *trace; /* Write an execution trace here, if not NULL */ #endif +#ifdef SQLITE_ENABLE_TREE_EXPLAIN + Explain *pExplain; /* The explainer */ + char *zExplain; /* Explanation of data structures */ +#endif VdbeFrame *pFrame; /* Parent frame */ VdbeFrame *pDelFrame; /* List of frame objects to free on VM reset */ int nFrame; /* Number of frames in pFrame list */ |