fix(mysql): cancel where condition for querying schema tables

sqle/driver/mysql/executor/executor.go

@@ -381,14 +381,28 @@ func (c *Executor) ShowDatabases(ignoreSysDatabase bool) ([]string, error) {
 	+------------+------------------+
 */
 func (c *Executor) ShowSchemaTables(schema string) ([]string, error) {
-	query := fmt.Sprintf(
-		"select TABLE_NAME from information_schema.tables where table_schema='%s' and TABLE_TYPE in ('BASE TABLE','SYSTEM VIEW')", schema)
+	return c.showSchemaObjects(schema, "'BASE TABLE'", "'SYSTEM VIEW'")
+}
+
+func (c *Executor) ShowAllSchemaObjects(schema string) ([]string, error) {
+	return c.showSchemaObjects(schema)
+}
 
+func (c *Executor) showSchemaObjects(schema string, objects ...string) ([]string, error) {
+	var query string
 	if c.IsLowerCaseTableNames() {
 		schema = strings.ToLower(schema)
-		query = fmt.Sprintf(
-			"select TABLE_NAME from information_schema.tables where lower(table_schema)='%s' and TABLE_TYPE in ('BASE TABLE','SYSTEM VIEW')", schema)
-
+		if len(objects) == 0 {
+			query = fmt.Sprintf("select TABLE_NAME from information_schema.tables where lower(table_schema)='%s'", schema)
+		} else {
+			query = fmt.Sprintf("select TABLE_NAME from information_schema.tables where lower(table_schema)='%s' and TABLE_TYPE in (%s)", schema, strings.Join(objects, ","))
+		}
+	} else {
+		if len(objects) == 0 {
+			query = fmt.Sprintf("select TABLE_NAME from information_schema.tables where table_schema='%s'", schema)
+		} else {
+			query = fmt.Sprintf("select TABLE_NAME from information_schema.tables where table_schema='%s' and TABLE_TYPE in (%s)", schema, strings.Join(objects, ","))
+		}
 	}
 	result, err := c.Db.Query(query)
 	if err != nil {

sqle/driver/mysql/session/context.go

@@ -465,7 +465,7 @@ func (c *Context) IsTableExist(stmt *ast.TableName) (bool, error) {
 			return false, nil
 		}
 
-		tables, err := c.e.ShowSchemaTables(schemaName)
+		tables, err := c.e.ShowAllSchemaObjects(schemaName)
 		if err != nil {
 			return false, err
 		}