mysql2sqlite.sh

#!/bin/bash - 
#===============================================================================
#
#          FILE: mysql2sqlite.sh
# 
#         USAGE: ./mysql2sqlite.sh [options] [db_name [tbl_name ...]] | \
#                  sqlite3 database.db
# 
#       EXAMPLE: ./mysql2sqlite.sh --no-data -u root -pMySecretPassWord \
#                  myDbase | sqlite3 database.db
# 
#   DESCRIPTION: Converts a mysqldump file into a Sqlite 3 compatible file. It
#                also extracts the MySQL `KEY xxxxx` from the CREATE block and
#                create them in separate commands _after_ all the INSERTs.
# 
#       OPTIONS: ---
#  REQUIREMENTS: mysqldump, sqlite3
#          BUGS: ---
#
#         NOTES: Awk was chosen because it's fast and portable. You can use
#                gawk, original awk or even the lightning fast mawk.
#
#                The mysqldump file is traversed only once.
#
#                Thanks to and @artemyk and @gkuenning for their nice tweaks.
#
#        AUTHOR: Jean-Luc Lacroix [@esperlu](github.com/esperlu)
#  ORGANIZATION: ---
#       CREATED: 04/26/2011 10:46:05 PM MST
#      REVISION: 0.11.2
#
#       LICENSE: Licensed under the Apache License, Version 2.0 (the "License");
#                you may not use this file except in compliance with the License.
#                You may obtain a copy of the License at
#
#                    http://www.apache.org/licenses/LICENSE-2.0
#
#                Unless required by applicable law or agreed to in writing, software
#                distributed under the License is distributed on an "AS IS" BASIS,
#                WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
#                See the License for the specific language governing permissions and
#                limitations under the License.
#===============================================================================

mysqldump  --compatible=ansi --skip-extended-insert --compact  "$@" | \

awk '

BEGIN {
	FS=",$"
	print "PRAGMA synchronous = OFF;"
	print "PRAGMA journal_mode = MEMORY;"
	print "BEGIN TRANSACTION;"
}

# CREATE TRIGGER statements have funny commenting.  Remember we are in trigger.
/^\/\*.*CREATE.*TRIGGER/ {
	gsub( /^.*TRIGGER/, "CREATE TRIGGER" )
	print
	inTrigger = 1
	next
}

# The end of CREATE TRIGGER has a stray comment terminator
/END \*\/;;/ { gsub( /\*\//, "" ); print; inTrigger = 0; next }

# The rest of triggers just get passed through
inTrigger != 0 { print; next }

# Skip other comments
/^\/\*/ { next }

# Print all `INSERT` lines. The single quotes are protected by another single quote.
/INSERT/ {
	gsub( /\\\047/, "\047\047" )
	gsub(/\\n/, "\n")
	gsub(/\\r/, "\r")
	gsub(/\\"/, "\"")
	gsub(/\\\\/, "\\")
	gsub(/\\\032/, "\032")
	print
	next
}

# Print the `CREATE` line as is and capture the table name.
/^CREATE/ {
	print
	if ( match( $0, /\"[^\"]+/ ) ) tableName = substr( $0, RSTART+1, RLENGTH-1 ) 
}

# Replace `FULLTEXT KEY` or any other `XXXXX KEY` except PRIMARY by `KEY`
/^  [^"]+KEY/ && !/^  PRIMARY KEY/ { gsub( /.+KEY/, "  KEY" ) }

# Get rid of field lengths in KEY lines
/ KEY/ { gsub(/\([0-9]+\)/, "") }

# Print all fields definition lines except the `KEY` lines.
/^  / && !/^(  KEY|\);)/ {
	gsub( /AUTO_INCREMENT|auto_increment/, "" )
	gsub( /(CHARACTER SET|character set) [^ ]+ /, "" )
	gsub( /DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP|default current_timestamp on update current_timestamp/, "" )
	gsub( /(COLLATE|collate) [^ ]+ /, "" )
	gsub(/(ENUM|enum)[^)]+\)/, "text ")
	gsub(/(SET|set)\([^)]+\)/, "text ")
	gsub(/UNSIGNED|unsigned/, "")
	if (prev) print prev ","
	prev = $1
}

# `KEY` lines are extracted from the `CREATE` block and stored in array for later print 
# in a separate `CREATE KEY` command. The index name is prefixed by the table name to 
# avoid a sqlite error for duplicate index name.
/^(  KEY|\);)/ {
	if (prev) print prev
	prev=""
	if ($0 == ");"){
		print
	} else {
		if ( match( $0, /\"[^"]+/ ) ) indexName = substr( $0, RSTART+1, RLENGTH-1 ) 
		if ( match( $0, /\([^()]+/ ) ) indexKey = substr( $0, RSTART+1, RLENGTH-1 ) 
		key[tableName]=key[tableName] "CREATE INDEX \"" tableName "_" indexName "\" ON \"" tableName "\" (" indexKey ");\n"
	}
}

# Print all `KEY` creation lines.
END {
	for (table in key) printf key[table]
	print "END TRANSACTION;"
}
'
exit 0