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Add code to select.c for printing the contents of parse-tree structures.

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The code is normally omitted.  You must compile with -DSQLITE_TEST
or -DSQLITE_DEBUG to enable it. (CVS 3606)

FossilOrigin-Name: 1b26d6875612a0ed25d6e293f005ea4966692759
This commit is contained in:
drh
2007-01-26 19:23:33 +00:00
parent 0ee5a1e763
commit 485f00391b
4 changed files with 106 additions and 10 deletions
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2
src/printf.c
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@@ -857,7 +857,7 @@ void sqlite3DebugPrintf(const char *zFormat, ...){
va_start(ap, zFormat);
base_vprintf(0, 0, zBuf, sizeof(zBuf), zFormat, ap);
va_end(ap);
fprintf(stdout,"%d: %s", getpid(), zBuf);
fprintf(stdout,"%s", zBuf);
fflush(stdout);
}
#endif

98
src/select.c
View File

@@ -12,7 +12,7 @@
** This file contains C code routines that are called by the parser
** to handle SELECT statements in SQLite.
**
** $Id: select.c,v 1.324 2007/01/26 19:04:00 drh Exp $
** $Id: select.c,v 1.325 2007/01/26 19:23:33 drh Exp $
*/
#include "sqliteInt.h"
@@ -3300,3 +3300,99 @@ select_end:
sqliteFree(sAggInfo.aFunc);
return rc;
}
#if defined(SQLITE_TEST) || defined(SQLITE_DEBUG)
/*
*******************************************************************************
** The following code is used for testing and debugging only. The code
** that follows does not appear in normal builds.
**
** These routines are used to print out the content of all or part of a
** parse structures such as Select or Expr. Such printouts are useful
** for helping to understand what is happening inside the code generator
** during the execution of complex SELECT statements.
**
** These routine are not called anywhere from within the normal
** code base. Then are intended to be called from within the debugger
** or from temporary "printf" statements inserted for debugging.
*/
void sqlite3PrintExpr(Expr *p){
if( p->token.z && p->token.n>0 ){
sqlite3DebugPrintf("(%.*s", p->token.n, p->token.z);
}else{
sqlite3DebugPrintf("(%d", p->op);
}
if( p->pLeft ){
sqlite3DebugPrintf(" ");
sqlite3PrintExpr(p->pLeft);
}
if( p->pRight ){
sqlite3DebugPrintf(" ");
sqlite3PrintExpr(p->pRight);
}
sqlite3DebugPrintf(")");
}
void sqlite3PrintExprList(ExprList *pList){
int i;
for(i=0; i<pList->nExpr; i++){
sqlite3PrintExpr(pList->a[i].pExpr);
if( i<pList->nExpr-1 ){
sqlite3DebugPrintf(", ");
}
}
}
void sqlite3PrintSelect(Select *p, int indent){
sqlite3DebugPrintf("%*sSELECT(%p) ", indent, "", p);
sqlite3PrintExprList(p->pEList);
sqlite3DebugPrintf("\n");
if( p->pSrc ){
char *zPrefix;
int i;
zPrefix = "FROM";
for(i=0; i<p->pSrc->nSrc; i++){
struct SrcList_item *pItem = &p->pSrc->a[i];
sqlite3DebugPrintf("%*s ", indent+6, zPrefix);
zPrefix = "";
if( pItem->pSelect ){
sqlite3DebugPrintf("(\n");
sqlite3PrintSelect(pItem->pSelect, indent+10);
sqlite3DebugPrintf("%*s)", indent+8, "");
}else if( pItem->zName ){
sqlite3DebugPrintf("%s", pItem->zName);
}
if( pItem->pTab ){
sqlite3DebugPrintf("(table: %s)", pItem->pTab->zName);
}
if( pItem->zAlias ){
sqlite3DebugPrintf(" AS %s", pItem->zAlias);
}
if( i<p->pSrc->nSrc-1 ){
sqlite3DebugPrintf(",");
}
sqlite3DebugPrintf("\n");
}
}
if( p->pWhere ){
sqlite3DebugPrintf("%*s WHERE ", indent, "");
sqlite3PrintExpr(p->pWhere);
sqlite3DebugPrintf("\n");
}
if( p->pGroupBy ){
sqlite3DebugPrintf("%*s GROUP BY ", indent, "");
sqlite3PrintExprList(p->pGroupBy);
sqlite3DebugPrintf("\n");
}
if( p->pHaving ){
sqlite3DebugPrintf("%*s HAVING ", indent, "");
sqlite3PrintExpr(p->pHaving);
sqlite3DebugPrintf("\n");
}
if( p->pOrderBy ){
sqlite3DebugPrintf("%*s ORDER BY ", indent, "");
sqlite3PrintExprList(p->pOrderBy);
sqlite3DebugPrintf("\n");
}
}
/* End of the structure debug printing code
*****************************************************************************/
#endif /* defined(SQLITE_TEST) || defined(SQLITE_DEBUG) */