From f8e397d0bd33309d8b128fb2959e49495728cb3f Mon Sep 17 00:00:00 2001 From: Roan Horning Date: Fri, 3 Mar 2023 23:00:50 -0500 Subject: [PATCH] Add required script mysql2sqlite to repository Converts MySQL dump to SQLite3 compatible dump (including MySQL KEY xxxxx statements from the CREATE block). Website: https://github.com/dumblob/mysql2sqlite The MIT License (MIT) Copyright (c) 2015 esperlu, 2016 dumblob --- utils/mysql2sqlite | 289 +++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 289 insertions(+) create mode 100755 utils/mysql2sqlite diff --git a/utils/mysql2sqlite b/utils/mysql2sqlite new file mode 100755 index 0000000..2a3e374 --- /dev/null +++ b/utils/mysql2sqlite @@ -0,0 +1,289 @@ +#!/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:\n"\ + " mysql2sqlite dump_mysql.sql > dump_sqlite3.sql\n" \ + " OR\n" \ + " mysql2sqlite dump_mysql.sql | sqlite3 sqlite.db\n" \ + "\n" \ + "NOTES:\n" \ + " Dash in filename is not supported, because dash (-) 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|REPLACE|replace)/ { + prev = "" + + # first replace \\ by \_ that mysqldump never generates to deal with + # sequnces like \\n that should be translated into \n, not \. + # 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( /[A-Za-z ]+(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|on) (UPDATE|update) (CURRENT_TIMESTAMP|current_timestamp)(\(\))?/, "" ) + gsub( /(DEFAULT|default) (CURRENT_TIMESTAMP|current_timestamp)(\(\))?/, "DEFAULT current_timestamp") + gsub( /(COLLATE|collate) [^ ]+ /, "" ) + gsub( /(ENUM|enum)[^)]+\)/, "text " ) + gsub( /(SET|set)\([^)]+\)/, "text " ) + gsub( /UNSIGNED|unsigned/, "" ) + gsub( /_utf8mb3/, "" ) + 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( $0, RSTART +2, RLENGTH -2 -1 ) ) ) + } + + # remove USING BTREE and other suffixes for USING, for example: "UNIQUE KEY + # `hostname_domain` (`hostname`,`domain`) USING BTREE," + gsub( / USING [^, ]+/, "" ) + + # field comments are not supported + gsub( / (COMMENT|comment).+$/, "" ) + # 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\".") + } +}