diff options
Diffstat (limited to 'src/vdbeaux.c')
| -rw-r--r-- | src/vdbeaux.c | 24 |
1 files changed, 21 insertions, 3 deletions
diff --git a/src/vdbeaux.c b/src/vdbeaux.c index 5225cbc73..286d4e92b 100644 --- a/src/vdbeaux.c +++ b/src/vdbeaux.c @@ -350,13 +350,27 @@ int sqlite3VdbeExplainParent(Parse *pParse){ } /* -** Add a new OP_Explain opcode. +** Set a debugger breakpoint on the following routine in order to +** monitor the EXPLAIN QUERY PLAN code generation. +*/ +#if defined(SQLITE_DEBUG) +void sqlite3ExplainBreakpoint(const char *z1, const char *z2){ + (void)z1; + (void)z2; +} +#endif + +/* +** Add a new OP_ opcode. ** ** If the bPush flag is true, then make this opcode the parent for ** subsequent Explains until sqlite3VdbeExplainPop() is called. */ void sqlite3VdbeExplain(Parse *pParse, u8 bPush, const char *zFmt, ...){ - if( pParse->explain==2 ){ +#if !defined(SQLITE_DEBUG) + if( pParse->explain==2 ) +#endif + { char *zMsg; Vdbe *v; va_list ap; @@ -368,7 +382,10 @@ void sqlite3VdbeExplain(Parse *pParse, u8 bPush, const char *zFmt, ...){ iThis = v->nOp; sqlite3VdbeAddOp4(v, OP_Explain, iThis, pParse->addrExplain, 0, zMsg, P4_DYNAMIC); - if( bPush) pParse->addrExplain = iThis; + sqlite3ExplainBreakpoint(bPush?"PUSH":"", sqlite3VdbeGetOp(v,-1)->p4.z); + if( bPush){ + pParse->addrExplain = iThis; + } } } @@ -376,6 +393,7 @@ void sqlite3VdbeExplain(Parse *pParse, u8 bPush, const char *zFmt, ...){ ** Pop the EXPLAIN QUERY PLAN stack one level. */ void sqlite3VdbeExplainPop(Parse *pParse){ + sqlite3ExplainBreakpoint("POP", 0); pParse->addrExplain = sqlite3VdbeExplainParent(pParse); } #endif /* SQLITE_OMIT_EXPLAIN */ |