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Minor improvements to comments in the data structure definitions. No

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changes to code.

FossilOrigin-Name: e77ac4050cf6c24118ce2af4c075f60e3eeb2dafe6d222c848bc4e541eef7172
This commit is contained in:
drh
2021-10-08 10:25:06 +00:00
parent dbfbb5a0c5
commit 074a131245
3 changed files with 23 additions and 14 deletions
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23
src/sqliteInt.h
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@@ -1571,10 +1571,10 @@ struct sqlite3 {
int nExtension; /* Number of loaded extensions */
void **aExtension; /* Array of shared library handles */
union {
void (*xLegacy)(void*,const char*); /* Legacy trace function */
int (*xV2)(u32,void*,void*,void*); /* V2 Trace function */
void (*xLegacy)(void*,const char*); /* mTrace==SQLITE_TRACE_LEGACY */
int (*xV2)(u32,void*,void*,void*); /* All other mTrace values */
} trace;
void *pTraceArg; /* Argument to the trace function */
void *pTraceArg; /* Argument to the trace function */
#ifndef SQLITE_OMIT_DEPRECATED
void (*xProfile)(void*,const char*,u64); /* Profiling function */
void *pProfileArg; /* Argument to profile function */
@@ -2717,10 +2717,10 @@ typedef int ynVar;
** tree.
**
** If the expression is an SQL literal (TK_INTEGER, TK_FLOAT, TK_BLOB,
** or TK_STRING), then Expr.token contains the text of the SQL literal. If
** the expression is a variable (TK_VARIABLE), then Expr.token contains the
** or TK_STRING), then Expr.u.zToken contains the text of the SQL literal. If
** the expression is a variable (TK_VARIABLE), then Expr.u.zToken contains the
** variable name. Finally, if the expression is an SQL function (TK_FUNCTION),
** then Expr.token contains the name of the function.
** then Expr.u.zToken contains the name of the function.
**
** Expr.pRight and Expr.pLeft are the left and right subexpressions of a
** binary operator. Either or both may be NULL.
@@ -2760,7 +2760,7 @@ typedef int ynVar;
** help reduce memory requirements, sometimes an Expr object will be
** truncated. And to reduce the number of memory allocations, sometimes
** two or more Expr objects will be stored in a single memory allocation,
** together with Expr.zToken strings.
** together with Expr.u.zToken strings.
**
** If the EP_Reduced and EP_TokenOnly flags are set when
** an Expr object is truncated. When EP_Reduced is set, then all
@@ -3018,6 +3018,13 @@ struct IdList {
/*
** The SrcItem object represents a single term in the FROM clause of a query.
** The SrcList object is mostly an array of SrcItems.
**
** Union member validity:
**
** u1.zIndexedBy fg.isIndexedBy && !fg.isTabFunc
** u1.pFuncArg fg.isTabFunc && !fg.isIndexedBy
** u2.pIBIndex fg.isIndexedBy && !fg.isCte
** u2.pCteUse fg.isCte && !fg.isIndexedBy
*/
struct SrcItem {
Schema *pSchema; /* Schema to which this item is fixed */
@@ -3612,6 +3619,8 @@ struct Parse {
#endif
};
/* Allowed values for Parse.eParseMode
*/
#define PARSE_MODE_NORMAL 0
#define PARSE_MODE_DECLARE_VTAB 1
#define PARSE_MODE_RENAME 2