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#!/bin/sh | |
# This script will migrate schema and data from a SQLite3 database to PostgreSQL. | |
# Schema translation based on http://stackoverflow.com/a/4581921/1303625. | |
# Some column types are not handled (e.g blobs). | |
SQLITE_DB_PATH=$1 | |
PG_DB_NAME=$2 | |
PG_USER_NAME=$3 | |
SQLITE_DUMP_FILE="sqlite_data.sql" | |
sqlite3 $SQLITE_DB_PATH .dump > $SQLITE_DUMP_FILE | |
# PRAGMAs are specific to SQLite3. | |
sed -i '/PRAGMA/d' $SQLITE_DUMP_FILE | |
# Convert sequences. | |
sed -i '/sqlite_sequence/d ; s/integer PRIMARY KEY AUTOINCREMENT/serial PRIMARY KEY/ig' $SQLITE_DUMP_FILE | |
# Convert column types. | |
sed -i 's/datetime/timestamp/g ; s/integer[(][^)]*[)]/integer/g ; s/text[(]\([^)]*\)[)]/varchar(\1)/g' $SQLITE_DUMP_FILE | |
createdb -U $PG_USER_NAME $PG_DB_NAME | |
psql $PG_DB_NAME $PG_USER_NAME < $SQLITE_DUMP_FILE | |
# Update Postgres sequences. | |
psql $PG_DB_NAME $PG_USER_NAME -c "\ds" | grep sequence | cut -d'|' -f2 | tr -d '[:blank:]' | | |
while read sequence_name; do | |
table_name=${sequence_name%_id_seq} | |
psql $PG_DB_NAME $PG_USER_NAME -c "select setval('$sequence_name', (select max(id) from $table_name))" | |
done |
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