Support mysql type

internal/gen.go

@@ -207,6 +207,8 @@ func pyInnerType(req *plugin.CodeGenRequest, col *plugin.Column) string {
 	switch req.Settings.Engine {
 	case "postgresql":
 		return postgresType(req, col)
+	case "mysql":
+		return mysqlType(req, col)
 	default:
 		log.Println("unsupported engine type")
 		return "Any"
@@ -376,6 +378,15 @@ func sqlalchemySQL(s, engine string) string {
 	s = strings.ReplaceAll(s, ":", `\\:`)
 	if engine == "postgresql" {
 		return postgresPlaceholderRegexp.ReplaceAllString(s, ":p$1")
+	} else if engine == "mysql" {
+		// All "?" in string s in string s are replaced with ":p1", ":p2", ... in that order
+		parts := strings.Split(s, "?")
+		for i := range parts {
+			if i != 0 {
+				parts[i] = fmt.Sprintf(":p%d%s", i, parts[i])
+			}
+		}
+		return strings.Join(parts, "")
 	}
 	return s
 }

internal/mysql_type.go

@@ -0,0 +1,72 @@
+package python
+
+import (
+	"log"
+
+	"buf.build/gen/go/sqlc/sqlc/protocolbuffers/go/protos/plugin"
+	"github.com/sqlc-dev/sqlc-go/sdk"
+)
+
+func mysqlType(req *plugin.CodeGenRequest, col *plugin.Column) string {
+	columnType := sdk.DataType(col.Type)
+
+	switch columnType {
+
+	case "varchar", "text", "char", "tinytext", "mediumtext", "longtext":
+		return "str"
+
+	case "tinyint":
+		if col.Length == 1 {
+			return "bool"
+		} else {
+			return "int"
+		}
+
+	case "int", "integer", "smallint", "mediumint", "year":
+		return "int"
+
+	case "bigint":
+		return "int"
+
+	case "blob", "binary", "varbinary", "tinyblob", "mediumblob", "longblob":
+		// TODO: Proper blob support
+		return "Any"
+
+	case "double", "double precision", "real", "float":
+		return "float"
+
+	case "decimal", "dec", "fixed":
+		return "string"
+
+	case "enum":
+		// TODO: Proper Enum support
+		return "string"
+
+	case "date", "timestamp", "datetime", "time":
+		return "datetime.date"
+
+	case "boolean", "bool":
+		return "bool"
+
+	case "json":
+		return "Any"
+
+	case "any":
+		return "Any"
+
+	default:
+		for _, schema := range req.Catalog.Schemas {
+			for _, enum := range schema.Enums {
+				if columnType == enum.Name {
+					if schema.Name == req.Catalog.DefaultSchema {
+						return "models." + modelName(enum.Name, req.Settings)
+					}
+					return "models." + modelName(schema.Name+"_"+enum.Name, req.Settings)
+				}
+			}
+		}
+		log.Printf("Unknown MySQL type: %s\n", columnType)
+		return "Any"
+
+	}
+}