Add query reference documentation

docs/source/reference/query.rst

@@ -1,2 +1,208 @@
 Query
 =====
+
+Syntax
+------
+
+.. parsed-literal::
+
+    query [<op-name>] {
+        *object-name* [([:ref:`argument <argument>`])]{
+            *object-fields*
+        }
+    }
+
+    query [<op-name>] {
+        *object_by_pk* (*key_column*: *value*) {
+            *object-fields*
+        }
+    }
+
+
+Example
+"""""""
+
+.. code-block:: graphql
+
+    query GetRecords {
+        record(
+            where: { stars: {_gt: 4} },
+            order_by: { release_date: asc },
+            limit: 10,
+            offset: 100,
+        ) {
+            name
+            stars
+            release_date
+
+            artist {
+                name
+            }
+
+            album {
+                name
+                year
+            }
+        }
+    }
+
+    query GetArtist {
+        artist_by_pk(id: 5231) {
+            name
+        }
+    }
+
+.. _argument:
+
+Argument
+--------
+
+.. parsed-literal::
+
+    :ref:`where-exp` | :ref:`order-by-exp` | :ref:`pagination-exp`
+
+
+Expressions
+-----------
+
+.. _where-exp:
+
+WhereExp
+""""""""
+
+.. parsed-literal::
+
+    where: :ref:`bool-exp`
+
+.. _order-by-exp:
+
+OrderByExp
+""""""""""
+
+.. parsed-literal::
+
+    order: [:ref:`table-order-by-exp`!]
+
+.. _pagination-exp:
+
+PaginationExp
+"""""""""""""
+
+.. parsed-literal::
+
+    limit: **Integer**
+    offset: **Integer**
+
+
+.. _bool-exp:
+
+BoolExp
+"""""""
+
+.. parsed-literal::
+
+    :ref:`and-exp` | :ref:`or-exp` | :ref:`not-exp` | :ref:`column-exp`
+
+.. _and-exp:
+
+AndExp
+""""""
+
+.. parsed-literal::
+
+    {
+        _and: [:ref:`bool-exp`]
+    }
+
+.. _or-exp:
+
+OrExp
+"""""
+
+.. parsed-literal::
+
+    {
+        _or: [:ref:`bool-exp`]
+    }
+
+
+.. _not-exp:
+
+NotExp
+""""""
+
+.. parsed-literal::
+
+    {
+        _not: :ref:`bool-exp`
+    }
+
+
+.. _column-exp:
+
+ColumnExp
+"""""""""
+
+.. parsed-literal::
+
+    {
+        *column-name*: {:ref:`Operator <operator>`: value}
+    }
+
+
+.. _table-order-by-exp:
+
+TableOrderByExp
+"""""""""""""""
+
+.. parsed-literal::
+
+    {
+        *column-name*: :ref:`enum-order-by`
+    }
+
+.. _operator:
+
+Operators
+---------
+
+Common
+""""""
+
+============    ===========
+Name            SQL
+============    ===========
+``_eq``         ``=``
+``_neq``        ``<>``
+``_lt``         ``<``
+``_lte``        ``<=``
+``_gt``         ``>``
+``_gte``        ``>=``
+``_in``         ``IN``
+``_nin``        ``NOT IN``
+``_is_null``    ``IS NULL``
+============    ===========
+
+Strings
+"""""""
+============    ===========
+Name            SQL
+============    ===========
+``_like``         ``LIKE``
+``_nlike``        ``NOT LIKE``
+============    ===========
+
+Enums
+-----
+
+.. _enum-order-by:
+
+OrderByEnum
+"""""""""""
+
+.. parsed-literal::
+
+    **enum** order_by {
+      desc
+      asc
+    }