private ExprNodeDesc getColumnExpr()

in phoenix5-hive/src/main/java/org/apache/phoenix/hive/ql/pushdown/PhoenixPredicateAnalyzer.java [186:208]

• 22 lines of code
• 14 McCabe index (conditional complexity)

    private ExprNodeDesc getColumnExpr(ExprNodeDesc expr) {
        if (expr instanceof ExprNodeColumnDesc) {
            return expr;
        }
        ExprNodeGenericFuncDesc funcDesc = null;
        if (expr instanceof ExprNodeGenericFuncDesc) {
            funcDesc = (ExprNodeGenericFuncDesc) expr;
        }
        if (null == funcDesc) {
            return expr;
        }
        GenericUDF udf = funcDesc.getGenericUDF();
        // check if its a simple cast expression.
    if ((udf instanceof GenericUDFBridge || udf instanceof GenericUDFToBinary
        || udf instanceof GenericUDFToChar || udf instanceof GenericUDFToVarchar
        || udf instanceof GenericUDFToDecimal || udf instanceof GenericUDFToDate
        || udf instanceof GenericUDFToUnixTimeStamp || udf instanceof GenericUDFToUtcTimestamp)
        && funcDesc.getChildren().size() == 1
                && funcDesc.getChildren().get(0) instanceof ExprNodeColumnDesc) {
            return expr.getChildren().get(0);
        }
        return expr;
    }