How to Convert a MySQL Dump SQL File to a SQLite3 Database?

Converting MySQL Dump SQL to Sqlite3 DB

Importing a MySQL dump SQL file into a SQLite3 database requires conversion to ensure compatibility.

The provided shell script offers an automated way to convert the dump file:

<code class="shell">#!/bin/sh
# Usage:  <dumpname>

if [ "x" == "x" ]; then
   echo "Usage:  <dumpname>"
   exit
fi
cat  |
grep -v ' KEY "' |
grep -v ' UNIQUE KEY "' |
grep -v ' PRIMARY KEY ' |
sed '/^SET/d' |
sed 's/ unsigned / /g' |
sed 's/ auto_increment/ primary key autoincrement/g' |
sed 's/ smallint([0-9]*) / integer /g' |
sed 's/ tinyint([0-9]*) / integer /g' |
sed 's/ int([0-9]*) / integer /g' |
sed 's/ character set [^ ]* / /g' |
sed 's/ enum([^)]*) / varchar(255) /g' |
sed 's/ on update [^,]*//g' |
perl -e 'local $/;$_=<>;s/,\n\)/\n\)/gs;print "begin;\n";print;print "commit;\n"' |
perl -pe '
  if (/^(INSERT.+?)\(/) {
     $a=;
     s/\'\''/'\'\''/g;
     s/\n/\n/g;
     s/\),\(/\);\n$a\(/g;
  }
  ' > .sql
cat .sql | sqlite3 .db > .err
ERRORS=`cat .err | wc -l`
if [ $ERRORS == 0 ]; then
  echo "Conversion completed without error. Output file: .db"
  rm .sql
  rm .err
    rm tmp
else
   echo "There were errors during conversion.  Please review .err and .sql for details."
fi</code>

The script performs the following transformations:

• Removes redundant key definitions.
• Sets fields to unsigned if applicable.
• Sets auto_increment fields to primary key autoincrement.
• Converts integer types to their equivalents in SQLite (smallint, tinyint, and int become integer).
• Removes character sets.
• Converts enum types to varchar(255).
• Removes set references to update triggers.
• Converts multiple row inserts to individual inserts for SQLite compatibility.
• Wraps the converted SQL in a transaction for safety.

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