Question

我正在尝试使用COALESCE函数运行配置单元查询来创建视图。但它就像扔错误一样无法识别附近的输入（＆＃39;＆＃39; SELECT＆＃39;＆＃39;＆＃39; realvalue＆＃39; in expression specification

查询如下。请帮忙，并提出这有什么问题。

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent" >

    <ScrollView
        xmlns:android="http://schemas.android.com/apk/res/android"
        android:id="@+id/scrollView"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:layout_centerVertical="true"
        android:fadingEdge="none"
        android:fillViewport="true"
        android:isScrollContainer="true"
        android:scrollbars="none" >

        <LinearLayout
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:orientation="vertical" >

            <android.support.v7.widget.CardView
                android:id="@+id/nameCardView"
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:layout_margin="10dip" >

                <LinearLayout
                    android:id="@+id/relativeLayout4"
                    style="@style/Widget.CardContent"
                    android:layout_width="match_parent"
                    android:layout_height="wrap_content"
                    android:orientation="horizontal"
                    android:weightSum="3" >

                    <LinearLayout
                        android:layout_width="0dip"
                        android:layout_height="wrap_content"
                        android:layout_weight="2.6"
                        android:gravity="center"
                        android:orientation="vertical" >

                        <TextView
                            android:id="@+id/Name"
                            android:layout_width="match_parent"
                            android:layout_height="wrap_content"
                            android:ellipsize="end"
                            android:gravity="start|center_vertical"
                            android:padding="5dp"
                            android:singleLine="true"
                            android:text="First"
                            android:textColor="@color/darkslate"
                            android:textSize="@dimen/font_normal_size"
                            android:textStyle="bold" />

                        <TextView
                            android:id="@+id/Details1"
                            android:layout_width="match_parent"
                            android:layout_height="wrap_content"
                            android:ellipsize="end"
                            android:gravity="start|center_vertical"
                            android:padding="5dp"
                            android:singleLine="true"
                            android:text="cardview"
                            android:textColor="@color/darkslate"
                            android:textSize="@dimen/font_normal_size_small"
                            android:textStyle="normal" />

                        <TextView
                            android:id="@+id/Details2"
                            android:layout_width="match_parent"
                            android:layout_height="wrap_content"
                            android:ellipsize="end"
                            android:gravity="start|center_vertical"
                            android:padding="5dp"
                            android:singleLine="true"
                            android:text="cardview"
                            android:textColor="@color/darkslate"
                            android:textSize="@dimen/font_normal_size_small"
                            android:textStyle="normal" />

                        <TextView
                            android:id="@+id/Details3"
                            android:layout_width="match_parent"
                            android:layout_height="wrap_content"
                            android:ellipsize="end"
                            android:gravity="start|center_vertical"
                            android:padding="5dp"
                            android:singleLine="true"
                            android:text="cardview"
                            android:textColor="@color/darkslate"
                            android:textSize="@dimen/font_normal_size_small"
                            android:textStyle="normal" />

                        <TextView
                            android:id="@+id/Details4"
                            android:layout_width="match_parent"
                            android:layout_height="wrap_content"
                            android:ellipsize="end"
                            android:gravity="start|center_vertical"
                            android:padding="5dp"
                            android:singleLine="true"
                            android:text="cardview"
                            android:textColor="@color/darkslate"
                            android:textSize="@dimen/font_normal_size_small"
                            android:textStyle="normal" />
                    </LinearLayout >
                </LinearLayout >
            </android.support.v7.widget.CardView >

            <android.support.v7.widget.CardView
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:layout_margin="10dip" >

                <LinearLayout
                    android:id="@+id/relativeLayout1"
                    style="@style/Widget.CardContent"
                    android:layout_width="match_parent"
                    android:layout_height="wrap_content"
                    android:gravity="center_horizontal"
                    android:orientation="vertical" >

                    <LinearLayout
                        android:id="@+id/product"
                        android:layout_width="match_parent"
                        android:layout_height="wrap_content"
                        android:orientation="horizontal"
                        android:padding="5dp" >

                        <TextView
                            android:id="@+id/_Details"
                            android:layout_width="0dp"
                            android:layout_height="wrap_content"
                            android:layout_weight="0.75"
                            android:gravity="start|center_vertical"
                            android:hint="Second"
                            android:padding="5dp"
                            android:singleLine="false"
                            android:textColor="@color/darkslate"
                            android:textColorHint="@color/darkslate"
                            android:textSize="16sp"
                            android:textStyle="normal" />
                    </LinearLayout >

                    <LinearLayout
                        android:id="@+id/gift"
                        android:layout_width="match_parent"
                        android:layout_height="wrap_content"
                        android:orientation="vertical"
                        android:padding="5dp" >

                        <TextView
                            android:id="@+id/__Details"
                            android:layout_width="wrap_content"
                            android:layout_height="wrap_content"
                            android:layout_weight="0.75"
                            android:gravity="start|center_vertical"
                            android:hint="cardview"
                            android:padding="5dp"
                            android:singleLine="false"
                            android:textColor="@color/darkslate"
                            android:textColorHint="@color/darkslate"
                            android:textSize="16sp"
                            android:textStyle="normal" />

                        <TextView
                            android:id="@+id/Details11"
                            android:layout_width="match_parent"
                            android:layout_height="wrap_content"
                            android:ellipsize="end"
                            android:gravity="start|center_vertical"
                            android:padding="5dp"
                            android:singleLine="true"
                            android:text="cardview"
                            android:textColor="@color/darkslate"
                            android:textSize="@dimen/font_normal_size_small"
                            android:textStyle="normal" />

                        <TextView
                            android:id="@+id/Details12"
                            android:layout_width="match_parent"
                            android:layout_height="wrap_content"
                            android:ellipsize="end"
                            android:gravity="start|center_vertical"
                            android:padding="5dp"
                            android:singleLine="true"
                            android:text="cardview"
                            android:textColor="@color/darkslate"
                            android:textSize="@dimen/font_normal_size_small"
                            android:textStyle="normal" />

                        <TextView
                            android:id="@+id/Details14"
                            android:layout_width="match_parent"
                            android:layout_height="wrap_content"
                            android:ellipsize="end"
                            android:gravity="start|center_vertical"
                            android:padding="5dp"
                            android:singleLine="true"
                            android:text="cardview"
                            android:textColor="@color/darkslate"
                            android:textSize="@dimen/font_normal_size_small"
                            android:textStyle="normal" />

                        <TextView
                            android:id="@+id/Details15"
                            android:layout_width="match_parent"
                            android:layout_height="wrap_content"
                            android:ellipsize="end"
                            android:gravity="start|center_vertical"
                            android:padding="5dp"
                            android:singleLine="true"
                            android:text="cardview"
                            android:textColor="@color/darkslate"
                            android:textSize="@dimen/font_normal_size_small"
                            android:textStyle="normal" />

                        <TextView
                            android:id="@+id/Details16"
                            android:layout_width="match_parent"
                            android:layout_height="wrap_content"
                            android:ellipsize="end"
                            android:gravity="start|center_vertical"
                            android:padding="5dp"
                            android:singleLine="true"
                            android:text="cardview"
                            android:textColor="@color/darkslate"
                            android:textSize="@dimen/font_normal_size_small"
                            android:textStyle="normal" />
                    </LinearLayout >
                </LinearLayout >
            </android.support.v7.widget.CardView >

            <LinearLayout
                android:id="@+id/linearScrollview"
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:orientation="vertical" >

                <android.support.v7.widget.CardView
                    android:layout_width="match_parent"
                    android:layout_height="wrap_content"
                    android:layout_margin="10dip" >

                    <LinearLayout
                        android:id="@+id/relativeLayout2"
                        style="@style/Widget.CardContent"
                        android:layout_width="match_parent"
                        android:layout_height="wrap_content"
                        android:gravity="center_horizontal"
                        android:orientation="vertical" >

                        <LinearLayout
                            android:layout_width="match_parent"
                            android:layout_height="wrap_content"
                            android:orientation="vertical"
                            android:padding="5dp" >

                            <TextView
                                android:id="@+id/Details21"
                                android:layout_width="wrap_content"
                                android:layout_height="wrap_content"
                                android:layout_weight="0.75"
                                android:gravity="start|center_vertical"
                                android:hint="Third"
                                android:padding="5dp"
                                android:singleLine="false"
                                android:textColor="@color/darkslate"
                                android:textColorHint="@color/darkslate"
                                android:textSize="16sp"
                                android:textStyle="normal" />

                            <TextView
                                android:id="@+id/txt1"
                                android:layout_width="wrap_content"
                                android:layout_height="wrap_content"
                                android:layout_weight="0.75"
                                android:gravity="start|center_vertical"
                                android:hint="cardview"
                                android:padding="5dp"
                                android:singleLine="false"
                                android:textColor="@color/darkslate"
                                android:textColorHint="@color/darkslate"
                                android:textSize="16sp"
                                android:textStyle="normal" />

                            <TextView
                                android:id="@+id/Details23"
                                android:layout_width="match_parent"
                                android:layout_height="wrap_content"
                                android:ellipsize="end"
                                android:gravity="start|center_vertical"
                                android:padding="5dp"
                                android:singleLine="true"
                                android:text="cardview"
                                android:textColor="@color/darkslate"
                                android:textSize="@dimen/font_normal_size_small"
                                android:textStyle="normal" />

                            <TextView
                                android:id="@+id/Details22"
                                android:layout_width="match_parent"
                                android:layout_height="wrap_content"
                                android:ellipsize="end"
                                android:gravity="start|center_vertical"
                                android:padding="5dp"
                                android:singleLine="true"
                                android:text="cardview"
                                android:textColor="@color/darkslate"
                                android:textSize="@dimen/font_normal_size_small"
                                android:textStyle="normal" />
                        </LinearLayout >
                    </LinearLayout >
                </android.support.v7.widget.CardView >
            </LinearLayout >

            <Button
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:layout_alignParentBottom="true"
                android:layout_margin="5dip"
                android:hint="click"
                android:padding="5dip" />
        </LinearLayout >
    </ScrollView >
</RelativeLayout >

等。

请帮忙。错误在于使用COALESCE中的select语句。 NoViableAltException（231 @ [435：1：precedenceEqualExpression：（（LPAREN precedenceBitwiseOrExpression COMMA）=＆gt; precedenceEqualExpressionMutiple | precedenceEqualExpressionSingle）;]）

由于

Answer 1

如果你需要的只是一个默认值，你可以做

CREATE VIEW IF NOT EXISTS exampledb.`ara_service` AS
SELECT T1.EntityId, T1.entityname AS EntityName,
       T1.`xxx`,
       T1.`yyy`,
       COALESCE (T1.`aaa`, def.`realvalue` ) AS `CombinedValue`,
       T1.`ddd`,
       T1.`jjj`,
FROM your_table T1
CROSS JOIN (
    SELECT `realvalue` 
    FROM exampledb.`aba_service` WHERE `id` = '333') def

Hive中的COALESCE命令问题

1 个答案: