290 lines
9.0 KiB
Plaintext
290 lines
9.0 KiB
Plaintext
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#!/usr/bin/awk -f
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# Authors: @esperlu, @artemyk, @gkuenning, @dumblob
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# FIXME detect empty input file and issue a warning
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function printerr( s ){ print s | "cat >&2" }
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BEGIN {
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if( ARGC != 2 ){
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printerr( \
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"USAGE:\n"\
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" mysql2sqlite dump_mysql.sql > dump_sqlite3.sql\n" \
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" OR\n" \
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" mysql2sqlite dump_mysql.sql | sqlite3 sqlite.db\n" \
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"\n" \
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"NOTES:\n" \
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" Dash in filename is not supported, because dash (-) means stdin." )
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no_END = 1
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exit 1
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}
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# Find INT_MAX supported by both this AWK (usually an ISO C signed int)
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# and SQlite.
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# On non-8bit-based architectures, the additional bits are safely ignored.
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# 8bit (lower precision should not exist)
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s="127"
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# "63" + 0 avoids potential parser misbehavior
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if( (s + 0) "" == s ){ INT_MAX_HALF = "63" + 0 }
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# 16bit
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s="32767"
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if( (s + 0) "" == s ){ INT_MAX_HALF = "16383" + 0 }
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# 32bit
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s="2147483647"
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if( (s + 0) "" == s ){ INT_MAX_HALF = "1073741823" + 0 }
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# 64bit (as INTEGER in SQlite3)
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s="9223372036854775807"
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if( (s + 0) "" == s ){ INT_MAX_HALF = "4611686018427387904" + 0 }
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# # 128bit
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# s="170141183460469231731687303715884105728"
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# if( (s + 0) "" == s ){ INT_MAX_HALF = "85070591730234615865843651857942052864" + 0 }
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# # 256bit
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# s="57896044618658097711785492504343953926634992332820282019728792003956564819968"
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# if( (s + 0) "" == s ){ INT_MAX_HALF = "28948022309329048855892746252171976963317496166410141009864396001978282409984" + 0 }
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# # 512bit
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# s="6703903964971298549787012499102923063739682910296196688861780721860882015036773488400937149083451713845015929093243025426876941405973284973216824503042048"
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# if( (s + 0) "" == s ){ INT_MAX_HALF = "3351951982485649274893506249551461531869841455148098344430890360930441007518386744200468574541725856922507964546621512713438470702986642486608412251521024" + 0 }
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# # 1024bit
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# s="89884656743115795386465259539451236680898848947115328636715040578866337902750481566354238661203768010560056939935696678829394884407208311246423715319737062188883946712432742638151109800623047059726541476042502884419075341171231440736956555270413618581675255342293149119973622969239858152417678164812112068608"
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# if( (s + 0) "" == s ){ INT_MAX_HALF = "44942328371557897693232629769725618340449424473557664318357520289433168951375240783177119330601884005280028469967848339414697442203604155623211857659868531094441973356216371319075554900311523529863270738021251442209537670585615720368478277635206809290837627671146574559986811484619929076208839082406056034304" + 0 }
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# # higher precision probably not needed
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FS=",$"
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print "PRAGMA synchronous = OFF;"
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print "PRAGMA journal_mode = MEMORY;"
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print "BEGIN TRANSACTION;"
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}
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# historically 3 spaces separate non-argument local variables
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function bit_to_int( str_bit, powtwo, i, res, bit, overflow ){
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powtwo = 1
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overflow = 0
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# 011101 = 1*2^0 + 0*2^1 + 1*2^2 ...
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for( i = length( str_bit ); i > 0; --i ){
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bit = substr( str_bit, i, 1 )
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if( overflow || ( bit == 1 && res > INT_MAX_HALF ) ){
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printerr( \
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NR ": WARN Bit field overflow, number truncated (LSBs saved, MSBs ignored)." )
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break
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}
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res = res + bit * powtwo
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# no warning here as it might be the last iteration
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if( powtwo > INT_MAX_HALF ){ overflow = 1; continue }
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powtwo = powtwo * 2
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}
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return res
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}
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# CREATE TRIGGER statements have funny commenting. Remember we are in trigger.
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/^\/\*.*(CREATE.*TRIGGER|create.*trigger)/ {
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gsub( /^.*(TRIGGER|trigger)/, "CREATE TRIGGER" )
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print
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inTrigger = 1
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next
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}
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# The end of CREATE TRIGGER has a stray comment terminator
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/(END|end) \*\/;;/ { gsub( /\*\//, "" ); print; inTrigger = 0; next }
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# The rest of triggers just get passed through
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inTrigger != 0 { print; next }
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# CREATE VIEW looks like a TABLE in comments
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/^\/\*.*(CREATE.*TABLE|create.*table)/ {
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inView = 1
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next
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}
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# end of CREATE VIEW
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/^(\).*(ENGINE|engine).*\*\/;)/ {
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inView = 0
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next
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}
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# content of CREATE VIEW
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inView != 0 { next }
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# skip comments
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/^\/\*/ { next }
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# skip PARTITION statements
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/^ *[(]?(PARTITION|partition) +[^ ]+/ { next }
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# print all INSERT lines
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( /^ *\(/ && /\) *[,;] *$/ ) || /^(INSERT|insert|REPLACE|replace)/ {
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prev = ""
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# first replace \\ by \_ that mysqldump never generates to deal with
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# sequnces like \\n that should be translated into \n, not \<LF>.
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# After we convert all escapes we replace \_ by backslashes.
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gsub( /\\\\/, "\\_" )
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# single quotes are escaped by another single quote
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gsub( /\\'/, "''" )
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gsub( /\\n/, "\n" )
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gsub( /\\r/, "\r" )
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gsub( /\\"/, "\"" )
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gsub( /\\\032/, "\032" ) # substitute char
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gsub( /\\_/, "\\" )
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# sqlite3 is limited to 16 significant digits of precision
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while( match( $0, /0x[0-9a-fA-F]{17}/ ) ){
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hexIssue = 1
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sub( /0x[0-9a-fA-F]+/, substr( $0, RSTART, RLENGTH-1 ), $0 )
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}
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if( hexIssue ){
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printerr( \
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NR ": WARN Hex number trimmed (length longer than 16 chars)." )
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hexIssue = 0
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}
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print
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next
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}
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# CREATE DATABASE is not supported
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/^(CREATE DATABASE|create database)/ { next }
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# print the CREATE line as is and capture the table name
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/^(CREATE|create)/ {
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if( $0 ~ /IF NOT EXISTS|if not exists/ || $0 ~ /TEMPORARY|temporary/ ){
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caseIssue = 1
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printerr( \
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NR ": WARN Potential case sensitivity issues with table/column naming\n" \
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" (see INFO at the end)." )
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}
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if( match( $0, /`[^`]+/ ) ){
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tableName = substr( $0, RSTART+1, RLENGTH-1 )
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}
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aInc = 0
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prev = ""
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firstInTable = 1
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print
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next
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}
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# Replace `FULLTEXT KEY` (probably other `XXXXX KEY`)
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/^ (FULLTEXT KEY|fulltext key)/ { gsub( /[A-Za-z ]+(KEY|key)/, " KEY" ) }
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# Get rid of field lengths in KEY lines
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/ (PRIMARY |primary )?(KEY|key)/ { gsub( /\([0-9]+\)/, "" ) }
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aInc == 1 && /PRIMARY KEY|primary key/ { next }
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# Replace COLLATE xxx_xxxx_xx statements with COLLATE BINARY
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/ (COLLATE|collate) [a-z0-9_]*/ { gsub( /(COLLATE|collate) [a-z0-9_]*/, "COLLATE BINARY" ) }
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# Print all fields definition lines except the `KEY` lines.
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/^ / && !/^( (KEY|key)|\);)/ {
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if( match( $0, /[^"`]AUTO_INCREMENT|auto_increment[^"`]/) ){
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aInc = 1
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gsub( /AUTO_INCREMENT|auto_increment/, "PRIMARY KEY AUTOINCREMENT" )
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}
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gsub( /(UNIQUE KEY|unique key) (`.*`|".*") /, "UNIQUE " )
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gsub( /(CHARACTER SET|character set) [^ ]+[ ,]/, "" )
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# FIXME
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# CREATE TRIGGER [UpdateLastTime]
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# AFTER UPDATE
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# ON Package
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# FOR EACH ROW
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# BEGIN
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# UPDATE Package SET LastUpdate = CURRENT_TIMESTAMP WHERE ActionId = old.ActionId;
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# END
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gsub( /(ON|on) (UPDATE|update) (CURRENT_TIMESTAMP|current_timestamp)(\(\))?/, "" )
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gsub( /(DEFAULT|default) (CURRENT_TIMESTAMP|current_timestamp)(\(\))?/, "DEFAULT current_timestamp")
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gsub( /(COLLATE|collate) [^ ]+ /, "" )
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gsub( /(ENUM|enum)[^)]+\)/, "text " )
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gsub( /(SET|set)\([^)]+\)/, "text " )
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gsub( /UNSIGNED|unsigned/, "" )
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gsub( /_utf8mb3/, "" )
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gsub( /` [^ ]*(INT|int|BIT|bit)[^ ]*/, "` integer" )
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gsub( /" [^ ]*(INT|int|BIT|bit)[^ ]*/, "\" integer" )
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ere_bit_field = "[bB]'[10]+'"
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if( match($0, ere_bit_field) ){
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sub( ere_bit_field, bit_to_int( substr( $0, RSTART +2, RLENGTH -2 -1 ) ) )
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}
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# remove USING BTREE and other suffixes for USING, for example: "UNIQUE KEY
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# `hostname_domain` (`hostname`,`domain`) USING BTREE,"
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gsub( / USING [^, ]+/, "" )
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# field comments are not supported
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gsub( / (COMMENT|comment).+$/, "" )
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# Get commas off end of line
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gsub( /,.?$/, "" )
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if( prev ){
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if( firstInTable ){
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print prev
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firstInTable = 0
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}
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else {
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print "," prev
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}
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}
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else {
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# FIXME check if this is correct in all cases
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if( match( $1,
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/(CONSTRAINT|constraint) ["].*["] (FOREIGN KEY|foreign key)/ ) ){
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print ","
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}
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}
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prev = $1
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}
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/ ENGINE| engine/ {
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if( prev ){
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if( firstInTable ){
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print prev
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firstInTable = 0
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}
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else {
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print "," prev
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}
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}
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prev=""
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print ");"
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next
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}
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# `KEY` lines are extracted from the `CREATE` block and stored in array for later print
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# in a separate `CREATE KEY` command. The index name is prefixed by the table name to
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# avoid a sqlite error for duplicate index name.
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/^( (KEY|key)|\);)/ {
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if( prev ){
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if( firstInTable ){
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print prev
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firstInTable = 0
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}
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else {
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print "," prev
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}
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}
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prev = ""
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if( $0 == ");" ){
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print
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}
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else {
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if( match( $0, /`[^`]+/ ) ){
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indexName = substr( $0, RSTART+1, RLENGTH-1 )
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}
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if( match( $0, /\([^()]+/ ) ){
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indexKey = substr( $0, RSTART+1, RLENGTH-1 )
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}
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# idx_ prefix to avoid name clashes (they really happen!)
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key[tableName] = key[tableName] "CREATE INDEX \"idx_" \
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tableName "_" indexName "\" ON \"" tableName "\" (" indexKey ");\n"
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}
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}
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END {
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if( no_END ){ exit 1}
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# print all KEY creation lines.
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for( table in key ){ printf key[table] }
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print "END TRANSACTION;"
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if( caseIssue ){
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printerr( \
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"INFO Pure sqlite identifiers are case insensitive (even if quoted\n" \
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" or if ASCII) and doesnt cross-check TABLE and TEMPORARY TABLE\n" \
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" identifiers. Thus expect errors like \"table T has no column named F\".")
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}
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}
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