【Hive】FAILED: ParseException line 5:2 Failed to recognize predicate 'date'. Failed rule: 'identifier' in column specification

1. 問題描述

在 Hive1.2.1 版本運行如下 HQL 時：

create table 
stats_hourly_tmp1(
  pl string,
  ver string,
  en string,
  s_time bigint,
  u_ud string,
  u_sd string,
  hour int,
  date string
)
row format delimited 
fields terminated by "\t";

會拋出如下異常：

FailedPredicateException(identifier,{useSQL11ReservedKeywordsForIdentifier()}?)
    at org.apache.hadoop.hive.ql.parse.HiveParser_IdentifiersParser.identifier(HiveParser_IdentifiersParser.java:10924)
    at org.apache.hadoop.hive.ql.parse.HiveParser.identifier(HiveParser.java:45850)
    at org.apache.hadoop.hive.ql.parse.HiveParser.columnNameType(HiveParser.java:38044)
    at org.apache.hadoop.hive.ql.parse.HiveParser.columnNameTypeList(HiveParser.java:36203)
    at org.apache.hadoop.hive.ql.parse.HiveParser.createTableStatement(HiveParser.java:5214)
    at org.apache.hadoop.hive.ql.parse.HiveParser.ddlStatement(HiveParser.java:2640)
    at org.apache.hadoop.hive.ql.parse.HiveParser.execStatement(HiveParser.java:1650)
    at org.apache.hadoop.hive.ql.parse.HiveParser.statement(HiveParser.java:1109)
    at org.apache.hadoop.hive.ql.parse.ParseDriver.parse(ParseDriver.java:202)
    at org.apache.hadoop.hive.ql.parse.ParseDriver.parse(ParseDriver.java:166)
    at org.apache.hadoop.hive.ql.Driver.compile(Driver.java:396)
    at org.apache.hadoop.hive.ql.Driver.compile(Driver.java:308)
    at org.apache.hadoop.hive.ql.Driver.compileInternal(Driver.java:1122)
    at org.apache.hadoop.hive.ql.Driver.runInternal(Driver.java:1170)
    at org.apache.hadoop.hive.ql.Driver.run(Driver.java:1059)
    at org.apache.hadoop.hive.ql.Driver.run(Driver.java:1049)
    at org.apache.hadoop.hive.cli.CliDriver.processLocalCmd(CliDriver.java:213)
    at org.apache.hadoop.hive.cli.CliDriver.processCmd(CliDriver.java:165)
    at org.apache.hadoop.hive.cli.CliDriver.processLine(CliDriver.java:376)
    at org.apache.hadoop.hive.cli.CliDriver.executeDriver(CliDriver.java:736)
    at org.apache.hadoop.hive.cli.CliDriver.run(CliDriver.java:681)
    at org.apache.hadoop.hive.cli.CliDriver.main(CliDriver.java:621)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:498)
    at org.apache.hadoop.util.RunJar.run(RunJar.java:221)
    at org.apache.hadoop.util.RunJar.main(RunJar.java:136)
FAILED: ParseException line 5:2 Failed to recognize predicate 'date'. Failed rule: 'identifier' in column specification

2. 問題分析

在 Hive1.2.0 版本開始增加了如下配置選項，默認值為 true。

hive.support.sql11.reserved.keywords=true

該選項的目的是：是否啟用對 SQL2011 保留關鍵字的支持。 啟用后，將支持部分 SQL2011 保留關鍵字。

3.　解決方案

從上面可以知道是因為啟用了對保留關鍵字的支持導致的，上面語句中 date 是保留關鍵字．所以解決方案如下：

方案（1）直接棄用保留關鍵字 date，即不使用留關鍵字，或者我們可以加上反引號。推薦方案

create table 
stats_hourly_tmp1(
  pl string,
  ver string,
  en string,
  s_time bigint,
  u_ud string,
  u_sd string,
  hour int,
  `date` string
)
row format delimited 
fields terminated by "\t";

方案（2）棄用對保留關鍵字的支持，此方案臨時生效。即當前命令行窗口有效。

hive (default)> set hive.support.sql11.reserved.keywords=false;

方案（3）或者在 /opt/module/hive/conf 目錄下的 hive-site.xml 配置文件中修改配置選項，此方案永久生效。

<property>
    <name>hive.support.sql11.reserved.keywords</name>
    <value>false</value>
</property>

4、參考鏈接

　　http://www.voidcn.com/article/p-zgjuikpt-bpz.html

　　https://blog.csdn.net/xjping0794/article/details/77720364