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115 lines
3.7 KiB
115 lines
3.7 KiB
15 years ago
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#!/bin/sh
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#
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# Copyright (C) 2006 Jaroslaw Staniek <js@iidea.pl>
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#
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# This program is free software; you can redistribute it and/or
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# modify it under the terms of the GNU General Public
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# License as published by the Free Software Foundation; either
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# version 2 of the License, or (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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# General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program; see the file COPYING. If not, write to
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# the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
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# Boston, MA 02110-1301, USA.
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#
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usage {
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echo "This script adds a new empty column to a table in a .kexi (SQLite 3)
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database file without removing data from the table.
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Usage:
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$0 database_name table_name new_column_name new_column_type
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[new_column_caption]
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- {database_name}.old backup file is created before proceeding
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- database_name and table_name must exist
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- new_column_name must not exist and should be valid idetifier
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- new_column_type must be one of:
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Byte, ShortInteger, Integer, BigInteger, Boolean, Date, DateTime, Time,
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Float, Double, Text, LongText, BLOB (for images)
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- new_column_caption can be any text; enclose it in \" \" if you want to use
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spaces there
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Example: to append a column 'photo' of type BLOB to the table 'cars', type
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$0 db.kexi cars photo BLOB Photo"
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}
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exit_with_error {
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rm -f "$temp_db"
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echo $*
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echo "Error."
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exit 1
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}
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check {
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[ -n "$*" ] && exit_with_error "$*"
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}
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ksqlite="ksqlite -noheader"
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if [ $# -lt 4 ] ; then
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usage
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exit 0
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fi
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database_name=$1
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table_name=$2
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new_column_name=$3
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new_column_type=$4
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new_column_caption=$5
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# get numeric value for the data type
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case $new_column_type in
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Byte) typenum=1;;
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ShortInteger) typenum=2;;
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Integer) typenum=3;;
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BigInteger) typenum=4;;
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Boolean) typenum=5;;
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Date) typenum=6;;
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DateTime) typenum=7;;
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Time) typenum=8;;
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Float) typenum=9;;
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Double) typenum=10;;
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Text) typenum=11;;
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LongText) typenum=12;;
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BLOB) typenum=13;;
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*) echo "Unknown type name '$new_column_type'"; exit 1;;
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esac
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temp_db=`mktemp "$database_name"XXXXXXXX` || exit_with_error
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cp "$database_name" "$temp_db" || exit_with_error
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msg=`echo "DROP TABLE '$table_name';" | $ksqlite "$temp_db"`
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check "$msg"
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# 1. Recreate table with new field appended
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msg=`echo ".schema '$table_name';" | $ksqlite "$database_name" | grep "^CREATE TABLE $table_name " | \
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sed -e "s/);/, $new_column_name $new_column_type);/g" | $ksqlite "$temp_db"`
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check "$msg"
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# 2.1. Get table's ID
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table_id=`echo "SELECT o_id FROM kexi__objects WHERE o_type=1 AND o_name='$table_name';" | \
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$ksqlite "$temp_db" || exit_with_error`
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# 2.2. Get the new field's order
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order=`echo "SELECT MAX(f_order)+1 FROM kexi__fields WHERE t_id=$table_id;" | $ksqlite "$temp_db" || exit_with_error`
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# 2.3. Add the new column information to kexi__fields metadata table
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msg=`echo "INSERT INTO kexi__fields (t_id, f_type, f_name, f_length, f_precision, f_constraints, \
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f_options, f_default, f_order, f_caption, f_help) \
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VALUES ($table_id, $typenum, '$new_column_name', \
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0, 0, 0, 0, NULL, $order, '$new_column_caption', NULL);" | $ksqlite "$temp_db"`
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check "$msg"
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# 3. Copy the old data
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msg=`echo ".dump '$table_name';" | $ksqlite "$database_name" | grep -v "^CREATE TABLE " | \
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sed -e "s/\(^INSERT.*\));$/\\1, NULL);/g" | $ksqlite "$temp_db"`
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check "$msg"
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# 4. Copy the original database file to .old file and replace the original with the new one
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cp "$database_name" "$database_name.old" || exit_with_error
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mv "$temp_db" "$database_name" || exit_with_error
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