Examples with QueryTranslationInfo com.sap.hadoop.windowing.query2.translate.QueryTranslationInfo used on opensource projects

Example 11 with QueryTranslationInfo

use of com.sap.hadoop.windowing.query2.translate.QueryTranslationInfo in project SQLWindowing by hbutani.

the class WhereTranslation method translate.

public static void translate(QueryDef qDef) throws WindowingException {
    QueryTranslationInfo tInfo = qDef.getTranslationInfo();
    QuerySpec spec = qDef.getSpec();
    ASTNode wExpr = spec.getWhereExpr();
    if (wExpr == null)
        return;
    WhereDef whDef = new WhereDef();
    whDef.setExpression(wExpr);
    QueryInputDef iDef = qDef.getInput();
    InputInfo iInfo = tInfo.getInputInfo(iDef);
    ExprNodeDesc exprNode = TranslateUtils.buildExprNode(wExpr, iInfo.getTypeCheckCtx());
    ExprNodeEvaluator exprEval = WindowingExprNodeEvaluatorFactory.get(tInfo, exprNode);
    ObjectInspector oi = TranslateUtils.initExprNodeEvaluator(qDef, exprNode, exprEval, iInfo);
    try {
        ObjectInspectorConverters.getConverter(oi, PrimitiveObjectInspectorFactory.javaBooleanObjectInspector);
    } catch (Throwable t) {
        throw new WindowingException("Where Expr must be convertible to a boolean value", t);
    }
    whDef.setExprNode(exprNode);
    whDef.setExprEvaluator(exprEval);
    whDef.setOI(oi);
    qDef.setWhere(whDef);
}