#269

Author: mgramin

src/main/kotlin/com/github/mgramin/sqlboot/model/resourcetype/impl/composite/md/MarkdownFile.kt

@@ -46,7 +46,13 @@ class MarkdownFile(private val name: String, private val text: String) : File {
     override fun content(): ByteArray {
         val visitor = CustomVisitor()
         Parser.builder().build().parse(text).accept(visitor)
-        return visitor.getMap().iterator().next().value.toByteArray()
+        return visitor
+                .getMap()
+                .asSequence()
+                .ifEmpty { mapOf("" to "").asSequence() }
+                .first()
+                .value
+                .toByteArray()
     }
 
     @Deprecated("")

src/main/kotlin/com/github/mgramin/sqlboot/sql/select/impl/parser/SELECT.g4

@@ -53,16 +53,29 @@ FUNCTION_EXPRESSION
   : ID '(' .*? ')'
   ;
 
+WITH_EXPRESSION
+  : 'with' LEFT_BRACKET .*? RIGHT_BRACKET
+  ;
+
 
 
 
 
 select_statement
-   : select select_row( COMMA select_row )*
-       from (schema_name+ DOT)? table_name
+   : (with)*
+     select select_row( COMMA select_row )*
+     from (schema_name+ DOT)? table_name
        .*?
    ;
 
+with
+    : with_expression
+    ;
+
+with_expression
+  : 'with' ID 'as' LEFT_BRACKET .*? RIGHT_BRACKET (COMMA ID 'as' LEFT_BRACKET .*? RIGHT_BRACKET)*
+  ;
+
 
 
 select