(FM-8879) Handle T-SQL Errors Properly

The previous commit that improved T-SQL error handling was incomplete.
That commit (9b8a0fe) was not able to
overcome an important issue.

The issue was that if there was a successfull row insert into a table
the `Errors` collection of the ADODB.Connection would be empty, even
if an error was deliberately thrown using the `THROW` keyword.

It turns out that the successfull row insert was causing a text return
value, and it's a known issue that if values are returned to the object
that the Errors collection will be empty.

We know now that turning `SET NOCOUNT ON` in the beginning of the query
will suppress that text status message and allow more errors to be
properly detected in the ADODB.Connect object, and handled properly
in the module's `onlyif` clause.

Author: RandomNoun7

lib/puppet/property/sqlserver_tsql.rb

@@ -6,6 +6,7 @@ class Puppet::Property::SqlserverTsql < Puppet::Property # rubocop:disable Style
     quoted_value = value.gsub('\'', '\'\'')
     erb_template = <<-TEMPLATE
 BEGIN TRY
+    SET NOCOUNT ON
     DECLARE @sql_text as NVARCHAR(max);
     SET @sql_text = N'#{quoted_value}'
     EXECUTE sp_executesql @sql_text;

spec/acceptance/sqlserver_tsql_spec.rb

@@ -162,6 +162,37 @@ def ensure_sqlserver_database(db_name, _ensure_val = 'present')
       run_sql_query(run_sql_query_opts)
     end
 
+    it 'Run sqlserver_tsql WITH onlyif that does a table insert:' do
+      # Initilize a new table name:
+      @table_name = 'Table_' + SecureRandom.hex(3)
+      @query = "USE #{db_name}; SELECT * FROM #{@table_name} WHERE id = 2;"
+      pp = <<-MANIFEST
+      sqlserver::config{'MSSQLSERVER':
+          instance_name => 'MSSQLSERVER',
+          admin_user    => 'sa',
+          admin_pass    => 'Pupp3t1@',
+      }
+      sqlserver_tsql{'testsqlserver_tsql':
+          instance => 'MSSQLSERVER',
+          database => '#{db_name}',
+          command => "INSERT #{@table_name} VALUES(2, 'name2', '[email protected]');",
+          onlyif => "CREATE TABLE #{@table_name} (id INT, name VARCHAR(20), email VARCHAR(20));
+          INSERT #{@table_name} VALUES(1, 'name', '[email protected]');
+          THROW 5300, 'Throw to trigger second INSERT statement in command property', 10"
+      }
+      MANIFEST
+      apply_manifest(pp, catch_failures: true)
+
+      puts "Validate #{@table_name} is NOT created:"
+      run_sql_query_opts = {
+        query: @query,
+        sql_admin_user: @admin_user,
+        sql_admin_pass: @admin_pass,
+        expected_row_count: 1,
+      }
+      run_sql_query(run_sql_query_opts)
+    end
+
     it 'Negative test: Run tsql with invalid command:' do
       pp = <<-MANIFEST
       sqlserver::config{'MSSQLSERVER':

spec/unit/puppet/property/tsql_spec.rb

@@ -13,8 +13,8 @@
   it 'munges value to have begin and end try' do
     @node[:command] = 'function foo'
     @node[:onlyif] = 'exec bar'
-    expect(@node[:onlyif]).to match(%r{BEGIN TRY\n\s+DECLARE @sql_text as NVARCHAR\(max\);\n\s+SET @sql_text = N'exec bar'\n\s+EXECUTE sp_executesql @sql_text;\nEND TRY})
-    expect(@node[:command]).to match(%r{BEGIN TRY\n\s+DECLARE @sql_text as NVARCHAR\(max\);\n\s+SET @sql_text = N'function foo'\n\s+EXECUTE sp_executesql @sql_text;\nEND TRY})
+    expect(@node[:onlyif]).to match(%r{BEGIN TRY\n\s+SET NOCOUNT ON\n\s+DECLARE @sql_text as NVARCHAR\(max\);\n\s+SET @sql_text = N'exec bar'\n\s+EXECUTE sp_executesql @sql_text;\nEND TRY})
+    expect(@node[:command]).to match(%r{BEGIN TRY\n\s+SET NOCOUNT ON\n\s+DECLARE @sql_text as NVARCHAR\(max\);\n\s+SET @sql_text = N'function foo'\n\s+EXECUTE sp_executesql @sql_text;\nEND TRY})
   end
 
   it 'properlies escape single quotes in queries' do