improved postgresql parser. bug fixed for issue #2153

src/main/java/com/alibaba/druid/sql/dialect/postgresql/parser/PGSQLStatementParser.java

@@ -519,4 +519,57 @@ public class PGSQLStatementParser extends SQLStatementParser {
         return stmt;
     }
 
+    public SQLStatement parseCreateIndex(boolean acceptCreate) {
+        if (acceptCreate) {
+            accept(Token.CREATE);
+        }
+
+        SQLCreateIndexStatement stmt = new SQLCreateIndexStatement(getDbType());
+        if (lexer.token() == Token.UNIQUE) {
+            lexer.nextToken();
+            if (lexer.identifierEquals("CLUSTERED")) {
+                lexer.nextToken();
+                stmt.setType("UNIQUE CLUSTERED");
+            } else {
+                stmt.setType("UNIQUE");
+            }
+        } else if (lexer.identifierEquals("FULLTEXT")) {
+            stmt.setType("FULLTEXT");
+            lexer.nextToken();
+        } else if (lexer.identifierEquals("NONCLUSTERED")) {
+            stmt.setType("NONCLUSTERED");
+            lexer.nextToken();
+        }
+
+        accept(Token.INDEX);
+
+        stmt.setName(this.exprParser.name());
+
+        accept(Token.ON);
+
+        stmt.setTable(this.exprParser.name());
+
+        if (lexer.token() == Token.USING) {
+            lexer.nextToken();
+            String using = lexer.stringVal();
+            accept(Token.IDENTIFIER);
+            stmt.setUsing(using);
+        }
+
+        accept(Token.LPAREN);
+
+        for (;;) {
+            SQLSelectOrderByItem item = this.exprParser.parseSelectOrderByItem();
+            item.setParent(stmt);
+            stmt.addItem(item);
+            if (lexer.token() == Token.COMMA) {
+                lexer.nextToken();
+                continue;
+            }
+            break;
+        }
+        accept(Token.RPAREN);
+
+        return stmt;
+    }
 }

src/main/java/com/alibaba/druid/sql/dialect/postgresql/visitor/PGOutputVisitor.java

@@ -2974,4 +2974,36 @@ public class PGOutputVisitor extends SQLASTOutputVisitor implements PGASTVisitor
         print0(ucase ? "END IF" : "end if");
         return false;
     }
+
+    @Override
+    public boolean visit(SQLCreateIndexStatement x) {
+        print0(ucase ? "CREATE " : "create ");
+        if (x.getType() != null) {
+            print0(x.getType());
+            print(' ');
+        }
+
+        print0(ucase ? "INDEX " : "index ");
+
+        if (x.getUsing() != null) {
+            print0(ucase ? " USING " : " using ");
+            ;
+            print0(x.getUsing());
+        }
+
+        x.getName().accept(this);
+        print0(ucase ? " ON " : " on ");
+        x.getTable().accept(this);
+        print0(" (");
+        printAndAccept(x.getItems(), ", ");
+        print(')');
+
+        SQLExpr comment = x.getComment();
+        if (comment != null) {
+            print0(ucase ? " COMMENT " : " comment ");
+            comment.accept(this);
+        }
+
+        return false;
+    }
 }