frontend: Added simple 'LOOKUP <type> WHERE <expression>' query.

[sysdb.git] / src / frontend / grammar.y

diff --git a/src/frontend/grammar.y b/src/frontend/grammar.y
index 3802c9c97de1aa70c8d387acd99df728c70ed0bb..50bb00e7f632fa35abb283ca7025b0c02a80a908 100644 (file)
--- a/src/frontend/grammar.y
+++ b/src/frontend/grammar.y
@@ -75,13 +75,16 @@ sdb_fe_yyerror(YYLTYPE *lval, sdb_fe_yyscan_t scanner, const char *msg);
 
 %token SCANNER_ERROR
 
+%token WHERE
+
 %token <str> IDENTIFIER STRING
-%token <node> FETCH LIST
+%token <node> FETCH LIST LOOKUP
 
 %type <list> statements
 %type <node> statement
        fetch_statement
        list_statement
+       lookup_statement
        expression
 
 %%
@@ -141,6 +144,8 @@ statement:
        |
        list_statement
        |
+       lookup_statement
+       |
        /* empty */
                {
                        $$ = NULL;
@@ -178,6 +183,32 @@ list_statement:
                }
        ;
 
+/*
+ * LOOKUP <type> WHERE <expression>;
+ *
+ * Returns detailed information about <type> matching expression.
+ */
+lookup_statement:
+       LOOKUP IDENTIFIER WHERE expression
+               {
+                       /* TODO: support other types as well */
+                       if (strcasecmp($2, "hosts")) {
+                               char errmsg[strlen($2) + 32];
+                               snprintf(errmsg, sizeof(errmsg),
+                                               YY_("unknown table %s"), $2);
+                               sdb_fe_yyerror(&yylloc, scanner, errmsg);
+                               YYABORT;
+                       }
+
+                       $$ = SDB_CONN_NODE(sdb_object_create_dT(/* name = */ NULL,
+                                               conn_lookup_t, conn_lookup_destroy));
+                       CONN_LOOKUP($$)->matcher = CONN_MATCHER($4);
+                       $$->cmd = CONNECTION_LOOKUP;
+                       free($2);
+                       $2 = NULL;
+               }
+       ;
+
 expression:
        STRING
                {