Added pgSQL support

src/parser/common/basicParser.ts

@@ -23,7 +23,8 @@ export default abstract class BasicParser<C = any> {
         parser.removeErrorListeners();
         parser.addErrorListener(new ParserErrorListener(errorListener));
 
-        const parserTree = parser.program();
+        // Note :  needed by pgsql
+        const parserTree = parser.program? parser.program() : parser.root();
 
         return parserTree;
     }
@@ -37,7 +38,12 @@ export default abstract class BasicParser<C = any> {
         parser.removeErrorListeners();
         parser.addErrorListener(new ParserErrorCollector(syntaxErrors));
 
-        parser.program();
+        // Note :  needed by pgsql
+        if (parser.program) {
+            parser.program();
+        } else {
+            parser.root();
+        }
 
         return lexerError.concat(syntaxErrors);
     }
@@ -89,7 +95,8 @@ export default abstract class BasicParser<C = any> {
         const parser = this.createParser(input);
         this._parser = parser;
 
-        const tree = parser.program();
+        // Note :  needed by pgsql
+        const tree = parser.program? parser.program() : parser.root();
         return tree.toStringTree(parser.ruleNames);
     }
 

src/parser/pgsql.ts

@@ -0,0 +1,17 @@
+import { InputStream, CommonTokenStream, Lexer } from 'antlr4';
+import { PostgreSQLLexer } from '../lib/pgsql/PostgreSQLLexer';
+import { PostgreSQLParser } from '../lib/pgsql/PostgreSQLParser';
+
+import BasicParser from './common/basicParser';
+
+export default class PLSQLParser extends BasicParser {
+    public createLexer(input: string): Lexer {
+        const chars = new InputStream(input.toUpperCase());
+        const lexer = <unknown> new PostgreSQLLexer(chars) as Lexer;
+        return lexer;
+    }
+    public createParserFromLexer(lexer: Lexer): any {
+        const tokenStream = new CommonTokenStream(lexer);
+        return new PostgreSQLParser(tokenStream);
+    }
+}