hive shell文件的主要作用是加载classpath，判断参数设置service命令，开始run,相对比较简单，主要都是shell的语法..
#!/usr/bin/env bash # Licensed to the Apache Software Foundation (ASF) under one or more # contributor license agreements. See the NOTICE file distributed with # this work for additional information regarding copyright ownership. # The ASF licenses this file to You under the Apache License, Version 2.0 # (the "License"); you may not use this file except in compliance with # the License. You may obtain a copy of the License at # # http://www.apache.org/licenses/LICENSE-2.0 # # Unless required by applicable law or agreed to in writing, software # distributed under the License is distributed on an "AS IS" BASIS, # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. # See the License for the specific language governing permissions and # limitations under the License. # 判断服务器Linux还是window cygwin=false case "`uname`" in CYGWIN*) cygwin=true;; esac #当前路径 bin=`dirname "$0"` # hive_home/bin bin=`cd "$bin"; pwd` # run .sh . "$bin"/hive-config.sh # $# 传递程序的参数总数，判断参数并赋值SERVICE SERVICE="" HELP="" while [ $# -gt 0 ]; do case "$1" in --service) shift SERVICE=$1 shift # 左移操作 ;; --rcfilecat) SERVICE=rcfilecat shift ;; --orcfiledump) SERVICE=orcfiledump shift ;; --help) HELP=_help shift ;; --debug*) DEBUG=$1 shift ;; *) break ;; esac done # if [ "$SERVICE" = "" ] ; then if [ "$HELP" = "_help" ] ; then SERVICE="help" else SERVICE="cli" fi fi # if [ -f "${HIVE_CONF_DIR}/hive-env.sh" ]; then . "${HIVE_CONF_DIR}/hive-env.sh" fi # 设置classpath CLASSPATH="${HIVE_CONF_DIR}" #hive lib path HIVE_LIB=${HIVE_HOME}/lib # check # needed for execution if [ ! -f ${HIVE_LIB}/hive-exec-*.jar ]; then echo "Missing Hive Execution Jar: ${HIVE_LIB}/hive-exec-*.jar" exit 1; fi if [ ! -f ${HIVE_LIB}/hive-metastore-*.jar ]; then echo "Missing Hive MetaStore Jar" exit 2; fi # cli specific code if [ ! -f ${HIVE_LIB}/hive-cli-*.jar ]; then echo "Missing Hive CLI Jar" exit 3; fi # 将hive lib path下的jar设置到classpath上 for f in ${HIVE_LIB}/*.jar; do CLASSPATH=${CLASSPATH}:$f; done # 添加jars # add the auxillary jars such as serdes if [ -d "${HIVE_AUX_JARS_PATH}" ]; then for f in ${HIVE_AUX_JARS_PATH}/*.jar; do if [[ ! -f $f ]]; then continue; fi if $cygwin; then f=`cygpath -w "$f"` fi AUX_CLASSPATH=${AUX_CLASSPATH}:$f if [ "${AUX_PARAM}" == "" ]; then AUX_PARAM=file://$f else AUX_PARAM=${AUX_PARAM},file://$f; fi done elif [ "${HIVE_AUX_JARS_PATH}" != "" ]; then HIVE_AUX_JARS_PATH=`echo $HIVE_AUX_JARS_PATH | sed 's/,/:/g'` if $cygwin; then HIVE_AUX_JARS_PATH=`cygpath -p -w "$HIVE_AUX_JARS_PATH"` HIVE_AUX_JARS_PATH=`echo $HIVE_AUX_JARS_PATH | sed 's/;/,/g'` fi AUX_CLASSPATH=${HIVE_AUX_JARS_PATH} AUX_PARAM="file://$(echo ${HIVE_AUX_JARS_PATH} | sed 's/:/,file:///g')" fi # adding jars from auxlib directory for f in ${HIVE_HOME}/auxlib/*.jar; do if [[ ! -f $f ]]; then continue; fi if $cygwin; then f=`cygpath -w "$f"` fi AUX_CLASSPATH=${AUX_CLASSPATH}:$f if [ "${AUX_PARAM}" == "" ]; then AUX_PARAM=file://$f else AUX_PARAM=${AUX_PARAM},file://$f; fi done if $cygwin; then CLASSPATH=`cygpath -p -w "$CLASSPATH"` CLASSPATH=${CLASSPATH};${AUX_CLASSPATH} else CLASSPATH=${CLASSPATH}:${AUX_CLASSPATH} fi # supress the HADOOP_HOME warnings in 1.x.x export HADOOP_HOME_WARN_SUPPRESS=true # pass classpath to hadoop export HADOOP_CLASSPATH="${HADOOP_CLASSPATH}:${CLASSPATH}" # check for hadoop in the path HADOOP_IN_PATH=`which hadoop 2>/dev/null` if [ -f ${HADOOP_IN_PATH} ]; then HADOOP_DIR=`dirname "$HADOOP_IN_PATH"`/.. fi # HADOOP_HOME env variable overrides hadoop in the path HADOOP_HOME=${HADOOP_HOME:-${HADOOP_PREFIX:-$HADOOP_DIR}} if [ "$HADOOP_HOME" == "" ]; then echo "Cannot find hadoop installation: $HADOOP_HOME or $HADOOP_PREFIX must be set or hadoop must be in the path"; exit 4; fi HADOOP=$HADOOP_HOME/bin/hadoop if [ ! -f ${HADOOP} ]; then echo "Cannot find hadoop installation: $HADOOP_HOME or $HADOOP_PREFIX must be set or hadoop must be in the path"; exit 4; fi # Make sure we're using a compatible version of Hadoop if [ "x$HADOOP_VERSION" == "x" ]; then HADOOP_VERSION=$($HADOOP version | awk '{if (NR == 1) {print $2;}}'); fi # Save the regex to a var to workaround quoting incompatabilities # between Bash 3.1 and 3.2 hadoop_version_re="^([[:digit:]]+).([[:digit:]]+)(.([[:digit:]]+))?.*$" if [[ "$HADOOP_VERSION" =~ $hadoop_version_re ]]; then hadoop_major_ver=${BASH_REMATCH[1]} hadoop_minor_ver=${BASH_REMATCH[2]} hadoop_patch_ver=${BASH_REMATCH[4]} else echo "Unable to determine Hadoop version information." echo "'hadoop version' returned:" echo `$HADOOP version` exit 5 fi if [ "$hadoop_major_ver" -lt "1" -a "$hadoop_minor_ver$hadoop_patch_ver" -lt "201" ]; then echo "Hive requires Hadoop 0.20.x (x >= 1)." echo "'hadoop version' returned:" echo `$HADOOP version` exit 6 fi if [ "${AUX_PARAM}" != "" ]; then HIVE_OPTS="$HIVE_OPTS -hiveconf hive.aux.jars.path=${AUX_PARAM}" AUX_JARS_CMD_LINE="-libjars ${AUX_PARAM}" fi SERVICE_LIST="" # for i in "$bin"/ext/*.sh ; do . $i done for i in "$bin"/ext/util/*.sh ; do . $i done if [ "$DEBUG" ]; then if [ "$HELP" ]; then debug_help exit 0 else get_debug_params "$DEBUG" export HADOOP_CLIENT_OPTS="$HADOOP_CLIENT_OPTS $HIVE_MAIN_CLIENT_DEBUG_OPTS" export HADOOP_OPTS="$HADOOP_OPTS $HADOOP_CLIENT_OPTS" fi fi TORUN="" for j in $SERVICE_LIST ; do if [ "$j" = "$SERVICE" ] ; then TORUN=${j}$HELP fi done if [ "$TORUN" = "" ] ; then echo "Service $SERVICE not found" echo "Available Services: $SERVICE_LIST" exit 7 else #默认执行 exec hadoop_home/bin/hadoop jar hive_home/lib/hive-cli-0.12.0.2.0.6.0-76.jar org.apache.hadoop.hive.cli.CliDriver # 执行CliDriver的main函数，main函数while循环等待输入内容，;为分隔符，输入;时开始运行.过程和结果标准输出到控制台. $TORUN "$@" fi