Fixed some more antlr4 issues

Author: chernser

jdbc-v2/src/main/antlr4/com/clickhouse/jdbc/internal/parser/antlr4/ClickHouseLexer.g4

@@ -385,7 +385,9 @@ JSON_TRUE  : 'true';
 
 // Tokens
 
-IDENTIFIER: (LETTER | UNDERSCORE) (LETTER | UNDERSCORE | DEC_DIGIT)*
+IDENTIFIER:
+    (LETTER | UNDERSCORE) (LETTER | UNDERSCORE | DEC_DIGIT)*
+    | DEC_DIGIT+ (LETTER | UNDERSCORE) (LETTER | UNDERSCORE | DEC_DIGIT)*
     | BACKQUOTE ( ~([\\`]) | (BACKSLASH .) | (BACKQUOTE BACKQUOTE))* BACKQUOTE
     | QUOTE_DOUBLE (~([\\"]) | (BACKSLASH .) | (QUOTE_DOUBLE QUOTE_DOUBLE))* QUOTE_DOUBLE
 ;

jdbc-v2/src/main/antlr4/com/clickhouse/jdbc/internal/parser/antlr4/ClickHouseParser.g4

@@ -510,6 +510,7 @@ topClause
 
 fromClause
     : FROM joinExpr
+    | FROM tableIdentifier
     | FROM identifier LPAREN JDBC_PARAM_PLACEHOLDER RPAREN
     | FROM selectStmt
     | FROM identifier LPAREN viewParam (COMMA viewParam)?  RPAREN
@@ -661,7 +662,7 @@ exchangeStmt
 // SET statement
 
 setStmt
-    : SET settingExprList
+    : SET IDENTIFIER EQ_SINGLE literal
     ;
 
 // SET ROLE statement