Hope it helps someone :)

ww9 · ww9 · commit 45b1eb03e1c9 · 2018-11-20T01:20:13.000-03:00
diff --git a/index.html b/index.html
@@ -0,0 +1,129 @@
+<!DOCTYPE html>
+<html>
+<head>
+	<meta charset="utf-8">
+	<title>MySQL to SQLite online converter 🔨</title>
+	<style type="text/css">
+		html,
+		body {
+			font-family: sans-serif;
+			padding: 0;
+			margin: 0;
+			width: 100%;
+			background: #999;
+			text-align: center;
+		}
+		body {
+			max-width: 1024px;
+			margin: 1em auto;
+		}
+		textarea {
+			display: block;
+			width: 100%;
+			height: 300px;
+		}
+		button {
+			margin: 30px 0;
+			padding: 5px 10px;
+			font-size: 32px;
+		}
+		p {
+			font-size: 20px;
+		}
+	</style>
+</head>
+<body>
+	<script>
+		function convert() {
+			var sqlite = "PRAGMA journal_mode = MEMORY;\n" + 
+			"PRAGMA synchronous = OFF;\n" +
+			"BEGIN TRANSACTION;\n";
+			sqlite = "";
+
+			var currentTable = '';
+
+			var lines = document.getElementById('mysql').value.split('\n');
+			var skip = [/^CREATE DATABASE/i, /^USE/i, /^\/\*/i, /^--/i];
+			var keys = [];
+
+			// Used this site to test regexes: https://regex101.com/
+
+			lineLoop:
+			for (var i = 0; i < lines.length; i++) {
+				line = lines[i].trim();
+				// Skip lines that match regexes in the skip[] array above
+				for (var j = 0; j < skip.length; j++) if (skip[j].test(line)) continue lineLoop;
+				// Include all `INSERT` lines. Replace \' by ''
+				if (/^(INSERT|\()/i.test(line)) {
+					sqlite += line.replace(/\\'/gi, "''") + "\n";
+					continue;
+				}
+				// Print the ´CREATE´ line as is and capture the table name
+				if ((m = /^\s*CREATE TABLE.*[`"](.*)[`"]/i.exec(line)) !== null) {
+					currentTable = m[1];
+					sqlite += "\n" + line + "\n";
+					continue;
+				}
+				// Clean table end line like:
+				// ) ENGINE=InnoDB AUTO_INCREMENT=59 DEFAULT CHARSET=utf8 COMMENT='By definition:\r\n- user_group #1 is administrator and will always have all permissions.\r\n- user_group #2 is guest and always have no permissions.\r\n';
+				if (line.startsWith(")")) {
+					sqlite += ");\n";
+					continue;
+				}
+				// Remove CONSTRAINT `fk_address_state1`" part from lines
+				line = line.replace(/^CONSTRAINT [`'"][\w]+[`'"][\s]+/gi, '');
+				// Replace "XXXXX KEY" by "KEY" except "PRIMARY KEY" "FOREIGN KEY" and "UNIQUE KEY"
+				line = line.replace(/^[^FOREIGN][^PRIMARY][^UNIQUE]\w+\s+KEY/gi, 'KEY');
+				
+				// Lines starting with (UNIQUE) KEY are extracted so we declare them all at the end of the script
+				// We also append key name with table name to avoid duplicate index name
+				// Example: KEY `name` (`permission_name`)
+				if ((m = /^(UNIQUE\s)*KEY\s+[`'"](\w+)[`'"]\s+\([`'"](\w+)[`'"]/ig.exec(line)) !== null) {
+					keyUnique = m[1] || "";
+					keyName = m[2];
+					colName = m[3];
+					keys.push('CREATE '+ keyUnique +'INDEX `'+ currentTable + '_' + keyName + '` ON `' + currentTable +'` (`' +  colName + '`);');
+					continue;
+				}
+				// Print all fields definition lines except "KEY" lines and lines starting with ")"
+				if (/^[^)]((?![\w]+\sKEY).)*$/gi.test(line)) {
+					// Clear invalid keywords
+					line = line.replace(/AUTO_INCREMENT|CHARACTER SET [^ ]+|CHARACTER SET [^ ]+|UNSIGNED/ig, "");
+					line = line.replace(/DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP|COLLATE [^ ]+/ig, "");
+					line = line.replace(/COMMENT\s['"`].*['"`]/ig, "");
+					line = line.replace(/SET\([^)]+\)|ENUM[^)]+\)/ig, "TEXT ");
+					// Clear weird MySQL types such as varchar(40) and int(11)
+					line = line.replace(/int\([0-9]*\)/ig, "INTEGER");
+					line = line.replace(/varchar\([0-9]*\)|LONGTEXT/ig, "TEXT");
+				}
+				
+				if (line != "") {
+					sqlite += line + "\n";
+				}				
+			}
+			sqlite += "\n";
+
+			// Fix last table line with comma
+			sqlite = sqlite.replace(/,\n\);/g, "\n);");
+
+			// Include all gathered keys as CREATE INDEX
+			sqlite += "\n\n" + keys.join("\n");
+
+			document.getElementById('sqlite').value = sqlite;
+		}
+	</script>
+
+	<h1>MySQL to SQLite online converter 🔨</h1>
+	<textarea id="mysql">Paste MySQL SQL code here</textarea>
+
+	<button onclick="convert()">Convert</button>
+
+	<h1>SQLite result:</h1>
+	<textarea id="sqlite"></textarea>
+
+	<p>Client side only. No dependencies or server side processing. You can save this page for offline use.<br>
+		Send requests, bug reports & suggestions to git repo: <a href="http://github.com/ww9/mysql2sqlite">http://github.com/ww9/mysql2sqlite</a>
+		<br>License: <a href="http://unlicense.org/">The Unlicense</a>, <a href="https://gist.github.com/ww9/4c4481fb7b55186960a34266078c88b1">Public Domain</a>. As free as it gets.</p>
+</body>
+
+</html>
