indents(sql): initial support (#4857)

* indents(sql): initial support

* indents(sql): fix queries and lua style

queries/sql/indents.scm

@@ -0,0 +1,27 @@
+[
+ (select)
+ (cte)
+ (column_definitions)
+ (case)
+ (subquery)
+ (insert)
+] @indent.begin
+
+
+(compound_statement
+  (keyword_begin)
+) @indent.begin
+
+(column_definitions ")" @indent.branch)
+
+(subquery ")" @indent.branch)
+
+(cte ")" @indent.branch)
+
+[
+ (keyword_end)
+ (keyword_values)
+ (keyword_into)
+] @indent.branch
+
+(keyword_end) @indent.end

tests/indent/sql/case.sql

@@ -0,0 +1,8 @@
+select
+    case
+        when a = 1 then '1'
+        when a = 2 then '2'
+        when a = 3 then '3'
+        else '0'
+    end as stmt1
+from tab;

tests/indent/sql/compound.sql

@@ -0,0 +1,3 @@
+begin
+    create table foo (bar int);
+end;

tests/indent/sql/create.sql

@@ -0,0 +1,4 @@
+create table my_table (
+    id bigint,
+    date date
+);

tests/indent/sql/cte.sql

@@ -0,0 +1,7 @@
+with data as (
+    select
+        a,
+        b
+    from tab
+)
+select * from data;

tests/indent/sql/insert.sql

@@ -0,0 +1,5 @@
+insert into mytable
+    (column1, column2)
+values
+    ('john', 123),
+    ('jane', 124);

tests/indent/sql/select.sql

@@ -0,0 +1,4 @@
+select
+    a,
+    b
+from tab;

tests/indent/sql/subquery.sql

@@ -0,0 +1,9 @@
+select
+    id
+from foo
+where id < (
+    select
+        id
+    from bar
+    limit 1
+);

tests/indent/sql_spec.lua

@@ -0,0 +1,19 @@
+local Runner = require("tests.indent.common").Runner
+--local XFAIL = require("tests.indent.common").XFAIL
+
+local run = Runner:new(it, "tests/indent/sql", {
+  tabstop = 4,
+  shiftwidth = 4,
+  softtabstop = 0,
+  expandtab = true,
+})
+
+describe("indent SQL:", function()
+  describe("whole file:", function()
+    run:whole_file(".", {
+      expected_failures = {},
+    })
+  end)
+
+  describe("new line:", function() end)
+end)