add sparkSql base grammar

src/parser/spark.ts

@@ -0,0 +1,19 @@
+import { InputStream, CommonTokenStream, Lexer } from 'antlr4';
+import { SqlBaseLexer } from '../lib/spark/SqlBaseLexer';
+import { SqlBaseParser } from '../lib/spark/SqlBaseParser';
+export * from '../lib/spark/SqlBaseVisitor';
+export * from '../lib/spark/SqlBaseListener';
+
+import BasicParser from './common/BasicParser';
+
+export default class SparkSQL extends BasicParser {
+    public createLexer(input: string): Lexer {
+        const chars = new InputStream(input.toUpperCase()); // Some Lexer only support uppercase token, So you need transform
+        const lexer = <unknown> new SqlBaseLexer(chars) as Lexer;
+        return lexer;
+    }
+    public createParserFromLexer(lexer: Lexer) {
+        const tokenStream = new CommonTokenStream(lexer);
+        return new SqlBaseParser(tokenStream);
+    }
+}