Small progress

src/Foundatio.Parsers.SqlQueries/Visitors/GenerateSqlVisitor.cs

@@ -0,0 +1,54 @@
+using System.Text;
+using System.Threading.Tasks;
+using Foundatio.Parsers.LuceneQueries.Nodes;
+using Foundatio.Parsers.LuceneQueries.Visitors;
+
+namespace Foundatio.Parsers.SqlQueries.Visitors;
+
+public class GenerateSqlVisitor : QueryNodeVisitorWithResultBase<string>
+{
+    private readonly StringBuilder _builder = new();
+
+    public override Task VisitAsync(GroupNode node, IQueryVisitorContext context)
+    {
+        _builder.Append(node.ToString(context != null ? context.DefaultOperator : GroupOperator.Default));
+
+        return Task.CompletedTask;
+    }
+
+    public override void Visit(TermNode node, IQueryVisitorContext context)
+    {
+        _builder.Append(node);
+    }
+
+    public override void Visit(TermRangeNode node, IQueryVisitorContext context)
+    {
+        _builder.Append(node);
+    }
+
+    public override void Visit(ExistsNode node, IQueryVisitorContext context)
+    {
+        _builder.Append(node);
+    }
+
+    public override void Visit(MissingNode node, IQueryVisitorContext context)
+    {
+        _builder.Append(node);
+    }
+
+    public override async Task<string> AcceptAsync(IQueryNode node, IQueryVisitorContext context)
+    {
+        await node.AcceptAsync(this, context).ConfigureAwait(false);
+        return _builder.ToString();
+    }
+
+    public static Task<string> RunAsync(IQueryNode node, IQueryVisitorContext context = null)
+    {
+        return new GenerateSqlVisitor().AcceptAsync(node, context);
+    }
+
+    public static string Run(IQueryNode node, IQueryVisitorContext context = null)
+    {
+        return RunAsync(node, context).GetAwaiter().GetResult();
+    }
+}

tests/Foundatio.Parsers.SqlQueries.Tests/SqlQueryParserTests.cs

@@ -47,18 +47,19 @@ public async Task CanGenerateSql() {
         });
         await context.SaveChangesAsync();
 
-        // "age:30"
         var parser = new SqlQueryParser();
+        parser.Configuration.UseFieldMap(new Dictionary<string, string> {{ "age", "DataValues.Any(DataDefinitionId = 1 AND NumberValue = " }});
         // translate AST to dynamic linq
         // lookup custom fields and convert to sql
         // know what data type each column is in order to know if it support range operators
-        var node = await parser.ParseAsync("""title:"software developer" age:30""");
+        var node = await parser.ParseAsync("""company.name:acme age:30""");
 
-        string sqlExpected = context.Employees.Where(e => e.DataValues.Any(dv => dv.DataDefinitionId == 1 && dv.NumberValue == 30)).ToQueryString();
-        string sqlActual = context.Employees.Where("""DataValues.Any(DataDefinitionId = 1 AND NumberValue = 30) """).ToQueryString();
+
+        string sqlExpected = context.Employees.Where(e => e.Company.Name == "acme" && e.DataValues.Any(dv => dv.DataDefinitionId == 1 && dv.NumberValue == 30)).ToQueryString();
+        string sqlActual = context.Employees.Where("""company.name = "acme" AND DataValues.Any(DataDefinitionId = 1 AND NumberValue = 30) """).ToQueryString();
         Assert.Equal(sqlExpected, sqlActual);
 
-        var employees = await context.Employees.Where(e => e.DataValues.Any(dv => dv.DataDefinitionId == 1 && dv.NumberValue == 30))
+        var employees = await context.Employees.Where(e => e.Title == "software developer" && e.DataValues.Any(dv => dv.DataDefinitionId == 1 && dv.NumberValue == 30))
             .ToListAsync();
 
         Assert.Single(employees);