JSqlParser failed to parse Teradata "UPDATE" statement with "FROM" clause #891

Describe the bug
JSqlParser failed to parse Teradata "UPDATE" statement with "FROM" clause.

To Reproduce
Steps to reproduce the behavior:

SQL: update a from db1.table1 a, db2.tabl2 b set a.column1 = b.column1 where a.column2 = b.column2;

Exception:

Exception in thread "main" net.sf.jsqlparser.JSQLParserException
at net.sf.jsqlparser.parser.CCJSqlParserManager.parse(CCJSqlParserManager.java:25)
Caused by: net.sf.jsqlparser.parser.ParseException: Encountered unexpected token: "FROM" "FROM"
at line 1, column 10.
Was expecting one of:
","
"ACTION"
"ANY"
"AS"
...
"XML"
"ZONE"
<K_DATETIMELITERAL>
<K_DATE_LITERAL>
<S_CHAR_LITERAL>
<S_IDENTIFIER>
<S_QUOTED_IDENTIFIER>
at net.sf.jsqlparser.parser.CCJSqlParser.generateParseException(CCJSqlParser.java:21726)
at net.sf.jsqlparser.parser.CCJSqlParser.jj_consume_token(CCJSqlParser.java:21573)
at net.sf.jsqlparser.parser.CCJSqlParser.Update(CCJSqlParser.java:850)
at net.sf.jsqlparser.parser.CCJSqlParser.SingleStatement(CCJSqlParser.java:132)
at net.sf.jsqlparser.parser.CCJSqlParser.Statement(CCJSqlParser.java:75)
at net.sf.jsqlparser.parser.CCJSqlParserManager.parse(CCJSqlParserManager.java:23)

System

• Database you are using
  Teradata
• Java Version
  JDK 10.0.2
• JSqlParser version
  3.0