From a842cf59067830dd9d7ece82448ff20b5a9f0a2b Mon Sep 17 00:00:00 2001
From: Christoph <ckubu@oopen.de>
Date: Sun, 24 Jun 2018 15:40:19 +0200
Subject: [PATCH] optimize_mysql_tables.sh: if a database is given at the
 command line, only check tables of this database.

---
 optimize_mysql_tables.sh | 64 ++++++++++++++++++++++++++++++++++++----
 1 file changed, 59 insertions(+), 5 deletions(-)

diff --git a/optimize_mysql_tables.sh b/optimize_mysql_tables.sh
index 2b3708d..bf366ca 100755
--- a/optimize_mysql_tables.sh
+++ b/optimize_mysql_tables.sh
@@ -16,6 +16,42 @@ DEFAULT_MYSQL_CREDENTIAL_ARGS="--login-path=local"
 # --- Some functions
 # -------------
 
+usage() {
+
+   [[ -n  "$1" ]] && error "$1"
+
+   [[ $terminal ]] && echo -e "
+\033[1mUsage:\033[m
+
+   $(basename $0) [DB-Name]
+
+\033[1mDescription\033[m
+
+   Script checks (and reorganizes) all tables of all databases by executing MySQL
+   command 'OPTIMIZE TABLE'.
+
+   If a database is given at the command line, only tables of that database
+   will be checked.
+
+   If a check on a table fails, MySQL command 'REPAIR TABLE' will be executed on
+   that table.
+
+\033[1mOptions\033[m
+
+   No Options available
+
+\033[1mFiles\033[m
+
+   $conf_file: Configuration file
+
+
+"
+
+   clean_up 1
+
+
+}
+
 
 clean_up() {
 
@@ -108,14 +144,18 @@ echo_skipped() {
    fi
 }
 
+trim() {
+    local var="$*"
+    var="${var#"${var%%[![:space:]]*}"}"   # remove leading whitespace characters
+    var="${var%"${var##*[![:space:]]}"}"   # remove trailing whitespace characters
+    echo -n "$var"
+}
+
+
 
 trap clean_up SIGHUP SIGINT SIGTERM
 
 
-
-
-
-
 # - Is this script running on terminal ?
 # -
 if [[ -t 1 ]] ; then
@@ -135,11 +175,23 @@ if [ -z "$mysql" ]; then
 fi
 
 
+# - Print help?
+# -
+if [[ "$(trim $*)" = "-h" ]] || [[ "$(trim $*)" = "--help" ]] ; then
+   usage
+fi
+
 
 # -------------
 # - Load Settings from configuration file
 # -------------
 
+if [[ -n "$1 " ]] ; then
+	DATABASES="$1"
+else
+	DATABASES=""
+fi
+
 if $terminal ; then
    echo ""
 fi
@@ -183,7 +235,9 @@ for _val in ${mysql_credential_args_arr[@]} ; do
       echo -e "[ \033[37m\033[1mMySQL $mysql_version\033[m ]: optimize (and repair) tables of databases at host '$(hostname -f)'."
    fi
 
-   DATABASES=`$mysql $mysql_credential_args -N -s -e "show databases"`
+	if [[ -z "$DATABASES" ]] ; then
+   	DATABASES="$($mysql $mysql_credential_args -N -s -e "show databases")"
+	fi
 
    length_table_name=0
    for db in $DATABASES ; do