bson::BSONObj getCondObj( const bson::BSONObj& all )
{
bson::BSONObj cond ;
const char* cmdStr = all.firstElementFieldName() ;
if ( all.hasField( "$query" ) )
{
cond = all.getObjectField( "$query" ) ;
}
else if ( all.hasField( "query" ) )
{
cond = all.getObjectField( "query" ) ;
}
else
{
cond = all ;
}
return cond ;
}
INT32 aggrProjectParser::addFunc( const CHAR *pAlias, const bson::BSONObj &funcObj,
const CHAR *pCLName, qgmOPFieldVec &selectorVec,
_qgmPtrTable *pTable )
{
INT32 rc = SDB_OK;
CHAR *pFuncBuf = NULL;
try
{
const CHAR *pFuncName = funcObj.firstElementFieldName();
PD_CHECK( AGGR_KEYWORD_PREFIX == pFuncName[0], SDB_INVALIDARG, error, PDERROR,
"failed to parse selector field(%s), function name must begin with \"$\"",
pFuncName );
const CHAR *pFuncParam = funcObj.firstElement().valuestr();
PD_CHECK( AGGR_KEYWORD_PREFIX == pFuncParam[0], SDB_INVALIDARG, error, PDERROR,
"failed to parse selector field(%s), parameter must begin with \"$\"",
pFuncParam );
qgmField slValAttr;
qgmField slValRelegation;
UINT32 nameLen = ossStrlen(&(pFuncName[1]));
UINT32 paramLen = ossStrlen(AGGR_CL_DEFAULT_ALIAS) + 1 + ossStrlen(&(pFuncParam[1]));
UINT32 curPos = 0;
pFuncBuf = ( CHAR * )SDB_OSS_MALLOC( nameLen + 3 + paramLen );
PD_CHECK( pFuncBuf != NULL, SDB_OOM, error, PDERROR,
"malloc failed(size=%d)", (nameLen + 3 + paramLen) );
ossStrcpy( pFuncBuf, &(pFuncName[1]) );
pFuncBuf[ nameLen ]='(';
curPos = nameLen + 1;
ossStrcpy( ( pFuncBuf + curPos), AGGR_CL_DEFAULT_ALIAS );
curPos += ossStrlen(AGGR_CL_DEFAULT_ALIAS);
pFuncBuf[ curPos ] = '.';
curPos += 1;
ossStrcpy( ( pFuncBuf + curPos ), &(pFuncParam[1]) );
curPos += ossStrlen(&(pFuncParam[1]));
pFuncBuf[ curPos ] = ')';
curPos += 1;
pFuncBuf[ curPos ] = 0;
rc = pTable->getOwnField( pFuncBuf, slValAttr );
PD_RC_CHECK( rc, PDERROR,
"failed to get the field(%s)",
pFuncBuf );
qgmDbAttr slVal( slValRelegation, slValAttr );
qgmField slAlias;
rc = pTable->getOwnField( pAlias, slAlias );
qgmOpField selector;
selector.alias = slAlias;
selector.value = slVal;
selector.type = SQL_GRAMMAR::FUNC;
selectorVec.push_back( selector );
}
catch ( std::exception &e )
{
PD_CHECK( SDB_INVALIDARG, SDB_INVALIDARG, error, PDERROR,
"failed to add function-field, received unexpected error:%s",
e.what() );
}
done:
if ( pFuncBuf != NULL )
{
SDB_OSS_FREE( pFuncBuf );
}
return rc;
error:
goto done;
}