dolphin: Placeholder catalog for count(*)

Author: kyleconroy

internal/compiler/engine.go

@@ -27,7 +27,7 @@ func NewCompiler(conf config.SQL, combo config.CombinedSettings) *Compiler {
 		c.catalog = catalog.New("main")
 	case config.EngineMySQL, config.EngineMySQLBeta:
 		c.parser = dolphin.NewParser()
-		c.catalog = catalog.New("public") // TODO: What is the default database for MySQL?
+		c.catalog = dolphin.NewCatalog()
 	case config.EnginePostgreSQL:
 		c.parser = postgresql.NewParser()
 		c.catalog = postgresql.NewCatalog()

internal/engine/dolphin/catalog.go

@@ -0,0 +1,35 @@
+package dolphin
+
+import (
+	"github.com/kyleconroy/sqlc/internal/sql/ast"
+	"github.com/kyleconroy/sqlc/internal/sql/catalog"
+)
+
+func NewCatalog() *catalog.Catalog {
+	def := "public" // TODO: What is the default database for MySQL?
+	return &catalog.Catalog{
+		DefaultSchema: def,
+		Schemas: []*catalog.Schema{
+			&catalog.Schema{
+				Name: def,
+				Funcs: []*catalog.Function{
+					{
+						Name: "count",
+						Args: []*catalog.Argument{
+							{
+								Type: &ast.TypeName{Name: "any"},
+							},
+						},
+						ReturnType: &ast.TypeName{Name: "bigint"},
+					},
+					{
+						Name:       "count",
+						Args:       []*catalog.Argument{},
+						ReturnType: &ast.TypeName{Name: "bigint"},
+					},
+				},
+			},
+		},
+		Extensions: map[string]struct{}{},
+	}
+}