esperlu/mysql2sqlite.sh

## mysql2sqlite.sh
#!/bin/sh

# 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.

# Awk is choosen 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.

# Usage: $ ./mysql2sqlite mysqldump-opts db-name | sqlite3 database.sqlite
# Example: $ ./mysql2sqlite --no-data -u root -pMySecretPassWord myDbase | sqlite3 database.sqlite

# Thanks to and @artemyk and @gkuenning for their nice tweaks.

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
	#!/bin/sh

	# 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.

	# Awk is choosen 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.

	# Usage: $ ./mysql2sqlite mysqldump-opts db-name \| sqlite3 database.sqlite
	# Example: $ ./mysql2sqlite --no-data -u root -pMySecretPassWord myDbase \| sqlite3 database.sqlite

	# Thanks to and @artemyk and @gkuenning for their nice tweaks.

	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