MXS-2713 Classify SET PASSWORD as QUERY_TYPE_WRITE

A change of the password is replicated to the slaves, so it
must only be sent to the master.

query_classifier/qc_sqlite/qc_sqlite.cc

@@ -2730,6 +2730,13 @@ public:
                 }
                 break;
 
+            case TK_SET:
+                if (m_keyword_2 == TK_PASSWORD)
+                {
+                    m_type_mask = QUERY_TYPE_WRITE;
+                }
+                break;
+
             case TK_START:
                 switch (m_keyword_2)
                 {
@@ -2932,6 +2939,9 @@ public:
                                 && pVariable->op == TK_ID
                                 && strcasecmp(pVariable->u.zToken, "password") == 0)
                             {
+                                // Even though SET PASSWORD looks like a session command it
+                                // is not, the password change will be replicated to slaves.
+                                m_type_mask = QUERY_TYPE_WRITE;
                                 // Ok, it was, so we break out.
                                 i = pList->nExpr;
                                 break;

query_classifier/qc_sqlite/sqlite-src-3110100/src/parse.y

@@ -633,7 +633,7 @@ columnid(A) ::= nm(X). {
   NAMES NEXT
   NO
   OF OFFSET OPEN
-  PARTITIONS PREVIOUS
+  PARTITIONS PASSWORD PREVIOUS
   QUICK
   RAISE RECURSIVE /*REINDEX*/ RELEASE /*RENAME*/ /*REPLACE*/ RESTRICT ROLLBACK ROLLUP ROW
   SAVEPOINT SELECT_OPTIONS_KW /*SEQUENCE*/ SLAVE /*START*/ STATEMENT STATUS

query_classifier/qc_sqlite/sqlite-src-3110100/tool/mkkeywordhash.c

@@ -380,6 +380,7 @@ static Keyword aKeywordTable[] = {
 #ifdef MAXSCALE
   { "PARTITION",        "TK_PARTITION",    ALWAYS                 },
   { "PARTITIONS",       "TK_PARTITIONS",   ALWAYS                 },
+  { "PASSWORD",         "TK_PASSWORD",     ALWAYS                 },
   { "PERSISTENT",       "TK_PERSISTENT",   ALWAYS                 },
 #endif
 #ifndef MAXSCALE