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#!/usr/bin/awk -f
# Authors: @esperlu, @artemyk, @gkuenning, @dumblob
# FIXME detect empty input file and issue a warning
function printerr( s ){ print s | "cat >&2" }
BEGIN {
if( ARGC != 2 ){
printerr( \
"USAGE: mysql2sqlite dump_mysql.sql > dump_sqlite3.sql\n" \
" file name - (dash) is not supported, because - means stdin")
no_END = 1
exit 1
}
# Find INT_MAX supported by both this AWK (usually an ISO C signed int)
# and SQlite.
# On non-8bit-based architectures, the additional bits are safely ignored.
# 8bit (lower precision should not exist)
s="127"
# "63" + 0 avoids potential parser misbehavior
if( (s + 0) "" == s ){ INT_MAX_HALF = "63" + 0 }
# 16bit
s="32767"
if( (s + 0) "" == s ){ INT_MAX_HALF = "16383" + 0 }
# 32bit
s="2147483647"
if( (s + 0) "" == s ){ INT_MAX_HALF = "1073741823" + 0 }
# 64bit (as INTEGER in SQlite3)
s="9223372036854775807"
if( (s + 0) "" == s ){ INT_MAX_HALF = "4611686018427387904" + 0 }
# # 128bit
# s="170141183460469231731687303715884105728"
# if( (s + 0) "" == s ){ INT_MAX_HALF = "85070591730234615865843651857942052864" + 0 }
# # 256bit
# s="57896044618658097711785492504343953926634992332820282019728792003956564819968"
# if( (s + 0) "" == s ){ INT_MAX_HALF = "28948022309329048855892746252171976963317496166410141009864396001978282409984" + 0 }
# # 512bit
# s="6703903964971298549787012499102923063739682910296196688861780721860882015036773488400937149083451713845015929093243025426876941405973284973216824503042048"
# if( (s + 0) "" == s ){ INT_MAX_HALF = "3351951982485649274893506249551461531869841455148098344430890360930441007518386744200468574541725856922507964546621512713438470702986642486608412251521024" + 0 }
# # 1024bit
# s="89884656743115795386465259539451236680898848947115328636715040578866337902750481566354238661203768010560056939935696678829394884407208311246423715319737062188883946712432742638151109800623047059726541476042502884419075341171231440736956555270413618581675255342293149119973622969239858152417678164812112068608"
# if( (s + 0) "" == s ){ INT_MAX_HALF = "44942328371557897693232629769725618340449424473557664318357520289433168951375240783177119330601884005280028469967848339414697442203604155623211857659868531094441973356216371319075554900311523529863270738021251442209537670585615720368478277635206809290837627671146574559986811484619929076208839082406056034304" + 0 }
# # higher precision probably not needed
FS=",$"
print "PRAGMA synchronous = OFF;"
print "PRAGMA journal_mode = MEMORY;"
print "BEGIN TRANSACTION;"
}
# historically 3 spaces separate non-argument local variables
function bit_to_int( str_bit, powtwo, i, res, bit, overflow ){
powtwo = 1
overflow = 0
# 011101 = 1*2^0 + 0*2^1 + 1*2^2 ...
for( i = length( str_bit ); i > 0; --i ){
bit = substr( str_bit, i, 1 )
if( overflow || ( bit == 1 && res > INT_MAX_HALF ) ){
printerr( \
NR ": WARN Bit field overflow, number truncated (LSBs saved, MSBs ignored)." )
break
}
res = res + bit * powtwo
# no warning here as it might be the last iteration
if( powtwo > INT_MAX_HALF ){ overflow = 1; continue }
powtwo = powtwo * 2
}
return res
}
# CREATE TRIGGER statements have funny commenting. Remember we are in trigger.
/^\/\*.*(CREATE.*TRIGGER|create.*trigger)/ {
gsub( /^.*(TRIGGER|trigger)/, "CREATE TRIGGER" )
print
inTrigger = 1
next
}
# The end of CREATE TRIGGER has a stray comment terminator
/(END|end) \*\/;;/ { gsub( /\*\//, "" ); print; inTrigger = 0; next }
# The rest of triggers just get passed through
inTrigger != 0 { print; next }
# CREATE VIEW looks like a TABLE in comments
/^\/\*.*(CREATE.*TABLE|create.*table)/ {
inView = 1
next
}
# end of CREATE VIEW
/^(\).*(ENGINE|engine).*\*\/;)/ {
inView = 0
next
}
# content of CREATE VIEW
inView != 0 { next }
# skip comments
/^\/\*/ { next }
# skip PARTITION statements
/^ *[(]?(PARTITION|partition) +[^ ]+/ { next }
# print all INSERT lines
( /^ *\(/ && /\) *[,;] *$/ ) || /^(INSERT|insert)/ {
prev = ""
# first replace \\ by \_ that mysqldump never generates to deal with
# sequnces like \\n that should be translated into \n, not \<LF>.
# After we convert all escapes we replace \_ by backslashes.
gsub( /\\\\/, "\\_" )
# single quotes are escaped by another single quote
gsub( /\\'/, "''" )
gsub( /\\n/, "\n" )
gsub( /\\r/, "\r" )
gsub( /\\"/, "\"" )
gsub( /\\\032/, "\032" ) # substitute char
gsub( /\\_/, "\\" )
# sqlite3 is limited to 16 significant digits of precision
while( match( $0, /0x[0-9a-fA-F]{17}/ ) ){
hexIssue = 1
sub( /0x[0-9a-fA-F]+/, substr( $0, RSTART, RLENGTH-1 ), $0 )
}
if( hexIssue ){
printerr( \
NR ": WARN Hex number trimmed (length longer than 16 chars)." )
hexIssue = 0
}
print
next
}
# CREATE DATABASE is not supported
/^(CREATE.*DATABASE|create.*database)/ { next }
# print the CREATE line as is and capture the table name
/^(CREATE|create)/ {
if( $0 ~ /IF NOT EXISTS|if not exists/ || $0 ~ /TEMPORARY|temporary/ ){
caseIssue = 1
printerr( \
NR ": WARN Potential case sensitivity issues with table/column naming\n" \
" (see INFO at the end)." )
}
if( match( $0, /`[^`]+/ ) ){
tableName = substr( $0, RSTART+1, RLENGTH-1 )
}
aInc = 0
prev = ""
firstInTable = 1
print
next
}
# Replace `FULLTEXT KEY` (probably other `XXXXX KEY`)
/^ (FULLTEXT KEY|fulltext key)/ { gsub( /.+(KEY|key)/, " KEY" ) }
# Get rid of field lengths in KEY lines
/ (PRIMARY |primary )?(KEY|key)/ { gsub( /\([0-9]+\)/, "" ) }
aInc == 1 && /PRIMARY KEY|primary key/ { next }
# Replace COLLATE xxx_xxxx_xx statements with COLLATE BINARY
/ (COLLATE|collate) [a-z0-9_]*/ { gsub( /(COLLATE|collate) [a-z0-9_]*/, "COLLATE BINARY" ) }
# Print all fields definition lines except the `KEY` lines.
/^ / && !/^( (KEY|key)|\);)/ {
if( match( $0, /[^"`]AUTO_INCREMENT|auto_increment[^"`]/) ){
aInc = 1
gsub( /AUTO_INCREMENT|auto_increment/, "PRIMARY KEY AUTOINCREMENT" )
}
gsub( /(UNIQUE KEY|unique key) (`.*`|".*") /, "UNIQUE " )
gsub( /(CHARACTER SET|character set) [^ ]+[ ,]/, "" )
# FIXME
# CREATE TRIGGER [UpdateLastTime]
# AFTER UPDATE
# ON Package
# FOR EACH ROW
# BEGIN
# UPDATE Package SET LastUpdate = CURRENT_TIMESTAMP WHERE ActionId = old.ActionId;
# END
gsub( /ON UPDATE CURRENT_TIMESTAMP|on update current_timestamp/, "" )
gsub( /(COLLATE|collate) [^ ]+ /, "" )
gsub( /(ENUM|enum)[^)]+\)/, "text " )
gsub( /(SET|set)\([^)]+\)/, "text " )
gsub( /UNSIGNED|unsigned/, "" )
gsub( /` [^ ]*(INT|int|BIT|bit)[^ ]*/, "` integer" )
gsub( /" [^ ]*(INT|int|BIT|bit)[^ ]*/, "\" integer" )
ere_bit_field = "[bB]'[10]+'"
if( match($0, ere_bit_field) ){
sub( ere_bit_field, bit_to_int( substr( $0, RSTART +2, RLENGTH -2 -1 ) ) )
}
# field comments are not supported
gsub( / (COMMENT|comment).+$/, "" )
# Get commas off end of line
gsub( /,.?$/, "" )
if( prev ){
if( firstInTable ){
print prev
firstInTable = 0
}
else {
print "," prev
}
}
else {
# FIXME check if this is correct in all cases
if( match( $1,
/(CONSTRAINT|constraint) \".*\" (FOREIGN KEY|foreign key)/ ) ){
print ","
}
}
prev = $1
}
/ ENGINE| engine/ {
if( prev ){
if( firstInTable ){
print prev
firstInTable = 0
}
else {
print "," prev
}
}
prev=""
print ");"
next
}
# `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|key)|\);)/ {
if( prev ){
if( firstInTable ){
print prev
firstInTable = 0
}
else {
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 )
}
# idx_ prefix to avoid name clashes (they really happen!)
key[tableName] = key[tableName] "CREATE INDEX \"idx_" \
tableName "_" indexName "\" ON \"" tableName "\" (" indexKey ");\n"
}
}
END {
if( no_END ){ exit 1}
# print all KEY creation lines.
for( table in key ){ printf key[table] }
print "END TRANSACTION;"
if( caseIssue ){
printerr( \
"INFO Pure sqlite identifiers are case insensitive (even if quoted\n" \
" or if ASCII) and doesnt cross-check TABLE and TEMPORARY TABLE\n" \
" identifiers. Thus expect errors like \"table T has no column named F\".")
}
}