add script for converting MS Access DB

msaccess/README.md

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+# Utilities for converting MS Access databases
+

msaccess/mdb2postgres.sh

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+#!/usr/bin/env bash
+
+# install mdbtools first!
+# mdbtools: https://github.com/brianb/mdbtools
+# ref: https://wiki.postgresql.org/wiki/Converting_from_other_Databases_to_PostgreSQL
+
+
+DBMS=postgres
+
+for MDB in `ls | grep .mdb$`
+do
+    # extract the mdb file basename, and substitute upcase letters to lowercase
+    MdbBASE=`basename ${MDB} .mdb`
+    lMdbBASE=`basename ${MDB} .mdb | tr 'A-Z' 'a-z'`
+    echo "Processing ${MdbBASE}"
+    # create mdb file basename and create directory for output
+    if [ ! -d ${lMdbBASE} ]; then
+        mkdir -p ${lMdbBASE}
+    fi
+    # check if the target database exists or not
+    # if the database exists, back it up first
+    checkdb=`psql -qA -t postgres -c "SELECT datname FROM pg_database where datname='${lMdbBASE}'"`
+    if [[ ${checkdb} == ${lMdbBASE} ]]; then
+        # backup existed database first
+        pg_dump ${lMdbBASE} | gzip > ${lMdbBASE}.sql.gz
+        dropdb ${lMdbBASE}
+    fi
+    # create database and import table schema
+    createdb ${lMdbBASE}
+
+    echo "mdb-schema ${MDB} ${DBMS} | sed 's/Char/Varchar/g' | sed 's/Postgres_Unknown 0x0c/text/g' | sed 's/Postgres_Unknown 0x10/INTEGER/g' | tr 'A-Z' 'a-z' | psql -d ${lMdbBASE}"
+
+    mdb-schema ${MDB} ${DBMS} | sed 's/Char/Varchar/g' | sed 's/Postgres_Unknown 0x0c/text/g' | sed 's/Postgres_Unknown 0x10/INTEGER/g' | tr 'A-Z' 'a-z' | psql -d ${lMdbBASE}
+
+    # import data
+    for T in $(mdb-tables ${MDB})
+    do 
+        mdb-export ${MDB} ${T} > ${lMdbBASE}/${T}.csv
+        mdb-export -q "'" -I ${DBMS} ${MDB} ${T} | tr 'A-Z' 'a-z' | psql -d ${lMdbBASE}
+    done
+done