added plugins

plugins/dbgate-plugin-mysql/src/backend/sql/columns.js

@@ -0,0 +1,15 @@
+module.exports = `
+select 
+	TABLE_NAME as pureName, 
+	COLUMN_NAME as columnName,
+	IS_NULLABLE as isNullable,
+	DATA_TYPE as dataType,
+	CHARACTER_MAXIMUM_LENGTH as charMaxLength,
+	NUMERIC_PRECISION as numericPrecision,
+	NUMERIC_SCALE as numericScale,
+	COLUMN_DEFAULT as defaultValue,
+	EXTRA as extra
+from INFORMATION_SCHEMA.COLUMNS
+where TABLE_SCHEMA = '#DATABASE#' and TABLE_NAME =[OBJECT_NAME_CONDITION]
+order by ORDINAL_POSITION
+`;