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Overview
Comment:Provide content for the bytecode.subprog column.
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SHA3-256: df893364b7cea07ff2b15b80cb294dccaffe701d51452264599b55304a36fa7c
User & Date: drh 2020-03-24 13:27:53
Context
2020-03-24
17:52
Fix a memory leak. check-in: c9f3405eea user: drh tags: bytecode-function
13:27
Provide content for the bytecode.subprog column. check-in: df893364b7 user: drh tags: bytecode-function
2020-03-23
23:17
Fix the build so that it works even without SQLITE_ENABLE_EXPLAIN_COMMENTS. check-in: 5896cbf4d0 user: drh tags: bytecode-function
Changes
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Changes to src/vdbeaux.c.

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        p->rc = sqlite3VdbeMemGrow(pSub, nByte, nSub!=0);
        if( p->rc!=SQLITE_OK ){
          rc = SQLITE_ERROR;
          break;
        }
        apSub = (SubProgram **)pSub->z;
        apSub[nSub++] = aOp[i].p4.pProgram;
        pSub->flags |= MEM_Blob;
        pSub->n = nSub*sizeof(SubProgram*);
        nRow += aOp[i].p4.pProgram->nOp;
      }
    }
    if( !bEqp ) break;
    if( aOp[i].opcode==OP_Explain ) break;
    if( aOp[i].opcode==OP_Init && p->pc>1 ) break;







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        p->rc = sqlite3VdbeMemGrow(pSub, nByte, nSub!=0);
        if( p->rc!=SQLITE_OK ){
          rc = SQLITE_ERROR;
          break;
        }
        apSub = (SubProgram **)pSub->z;
        apSub[nSub++] = aOp[i].p4.pProgram;
        MemSetTypeFlag(pSub, MEM_Blob);
        pSub->n = nSub*sizeof(SubProgram*);
        nRow += aOp[i].p4.pProgram->nOp;
      }
    }
    if( !bEqp ) break;
    if( aOp[i].opcode==OP_Explain ) break;
    if( aOp[i].opcode==OP_Init && p->pc>1 ) break;

Changes to src/vdbevtab.c.

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  sqlite3_context *ctx,       /* First argument to sqlite3_result_...() */
  int i                       /* Which column to return */
){
  bytecodevtab_cursor *pCur = (bytecodevtab_cursor*)cur;
  bytecodevtab *pVTab;
  Op *pOp = pCur->aOp + pCur->iAddr;
  switch( i ){
    case 0:
      sqlite3_result_int(ctx, pCur->iAddr);
      break;
    case 1:
      sqlite3_result_text(ctx, (char*)sqlite3OpcodeName(pOp->opcode),
                          -1, SQLITE_STATIC);
      break;
    case 2:
      sqlite3_result_int(ctx, pOp->p1);
      break;
    case 3:
      sqlite3_result_int(ctx, pOp->p2);
      break;
    case 4:
      sqlite3_result_int(ctx, pOp->p3);
      break;
    case 5:
    case 7:
      pVTab = (bytecodevtab*)cur->pVtab;
      if( pCur->zP4==0 ){
        pCur->zP4 = sqlite3VdbeDisplayP4(pVTab->db, pOp);
      }
      if( i==5 ){
        sqlite3_result_text(ctx, pCur->zP4, -1, SQLITE_STATIC);
      }else{
#ifdef SQLITE_ENABLE_EXPLAIN_COMMENTS
        char *zCom = sqlite3VdbeDisplayComment(pVTab->db, pOp, pCur->zP4);
        sqlite3_result_text(ctx, zCom, -1, sqlite3_free);
#endif
      }
      break;
    case 6:
      sqlite3_result_int(ctx, pOp->p5);
      break;













  }
  return SQLITE_OK;
}

/*
** Return the rowid for the current row.  In this implementation, the
** rowid is the same as the output value.







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  sqlite3_context *ctx,       /* First argument to sqlite3_result_...() */
  int i                       /* Which column to return */
){
  bytecodevtab_cursor *pCur = (bytecodevtab_cursor*)cur;
  bytecodevtab *pVTab;
  Op *pOp = pCur->aOp + pCur->iAddr;
  switch( i ){
    case 0:   /* addr */
      sqlite3_result_int(ctx, pCur->iAddr);
      break;
    case 1:   /* opcode */
      sqlite3_result_text(ctx, (char*)sqlite3OpcodeName(pOp->opcode),
                          -1, SQLITE_STATIC);
      break;
    case 2:   /* p1 */
      sqlite3_result_int(ctx, pOp->p1);
      break;
    case 3:   /* p2 */
      sqlite3_result_int(ctx, pOp->p2);
      break;
    case 4:   /* p3 */
      sqlite3_result_int(ctx, pOp->p3);
      break;
    case 5:   /* p4 */
    case 7:   /* comment */
      pVTab = (bytecodevtab*)cur->pVtab;
      if( pCur->zP4==0 ){
        pCur->zP4 = sqlite3VdbeDisplayP4(pVTab->db, pOp);
      }
      if( i==5 ){
        sqlite3_result_text(ctx, pCur->zP4, -1, SQLITE_STATIC);
      }else{
#ifdef SQLITE_ENABLE_EXPLAIN_COMMENTS
        char *zCom = sqlite3VdbeDisplayComment(pVTab->db, pOp, pCur->zP4);
        sqlite3_result_text(ctx, zCom, -1, sqlite3_free);
#endif
      }
      break;
    case 6:     /* p5 */
      sqlite3_result_int(ctx, pOp->p5);
      break;
    case 8: {   /* subprog */
      Op *aOp = pCur->aOp;
      if( pCur->iRowid==pCur->iAddr+1 ){
        break;  /* Result is NULL for the main program */
      }else if( aOp[0].p4type==P4_DYNAMIC
       && aOp[0].p4.z!=0
       && strncmp(aOp[0].p4.z,"-- ", 3)==0 ){
         sqlite3_result_text(ctx, aOp[0].p4.z+3, -1, SQLITE_STATIC);
      }else{
         sqlite3_result_text(ctx, "(FK)", 4, SQLITE_STATIC);
      }
      break;
    }
  }
  return SQLITE_OK;
}

/*
** Return the rowid for the current row.  In this implementation, the
** rowid is the same as the output value.