sequelize
Version:
Sequelize is a promise-based Node.js ORM tool for Postgres, MySQL, MariaDB, SQLite, Microsoft SQL Server, Amazon Redshift and Snowflake’s Data Cloud. It features solid transaction support, relations, eager and lazy loading, read replication and more.
218 lines (200 loc) • 6.29 kB
JavaScript
'use strict';
const moment = require('moment');
module.exports = BaseTypes => {
const warn = BaseTypes.ABSTRACT.warn.bind(undefined, 'https://msdn.microsoft.com/en-us/library/ms187752%28v=sql.110%29.aspx');
/**
* Removes unsupported MSSQL options, i.e., LENGTH, UNSIGNED and ZEROFILL, for the integer data types.
*
* @param {object} dataType The base integer data type.
* @private
*/
function removeUnsupportedIntegerOptions(dataType) {
if (dataType._length || dataType.options.length || dataType._unsigned || dataType._zerofill) {
warn(`MSSQL does not support '${dataType.key}' with options. Plain '${dataType.key}' will be used instead.`);
dataType._length = undefined;
dataType.options.length = undefined;
dataType._unsigned = undefined;
dataType._zerofill = undefined;
}
}
/**
* types: [hex, ...]
*
* @see hex here https://github.com/tediousjs/tedious/blob/master/src/data-type.ts
*/
BaseTypes.DATE.types.mssql = [43];
BaseTypes.STRING.types.mssql = [231, 173];
BaseTypes.CHAR.types.mssql = [175];
BaseTypes.TEXT.types.mssql = false;
// https://msdn.microsoft.com/en-us/library/ms187745(v=sql.110).aspx
BaseTypes.TINYINT.types.mssql = [30];
BaseTypes.SMALLINT.types.mssql = [34];
BaseTypes.MEDIUMINT.types.mssql = false;
BaseTypes.INTEGER.types.mssql = [38];
BaseTypes.BIGINT.types.mssql = false;
BaseTypes.FLOAT.types.mssql = [109];
BaseTypes.TIME.types.mssql = [41];
BaseTypes.DATEONLY.types.mssql = [40];
BaseTypes.BOOLEAN.types.mssql = [104];
BaseTypes.BLOB.types.mssql = [165];
BaseTypes.DECIMAL.types.mssql = [106];
BaseTypes.UUID.types.mssql = false;
BaseTypes.ENUM.types.mssql = false;
BaseTypes.REAL.types.mssql = [109];
BaseTypes.DOUBLE.types.mssql = [109];
// BaseTypes.GEOMETRY.types.mssql = [240]; // not yet supported
BaseTypes.GEOMETRY.types.mssql = false;
class BLOB extends BaseTypes.BLOB {
toSql() {
if (this._length) {
if (this._length.toLowerCase() === 'tiny') { // tiny = 2^8
warn('MSSQL does not support BLOB with the `length` = `tiny` option. `VARBINARY(256)` will be used instead.');
return 'VARBINARY(256)';
}
warn('MSSQL does not support BLOB with the `length` option. `VARBINARY(MAX)` will be used instead.');
}
return 'VARBINARY(MAX)';
}
_hexify(hex) {
return `0x${hex}`;
}
}
class STRING extends BaseTypes.STRING {
toSql() {
if (!this._binary) {
return `NVARCHAR(${this._length})`;
}
return `BINARY(${this._length})`;
}
_stringify(value, options) {
if (this._binary) {
return BLOB.prototype._stringify(value);
}
return options.escape(value);
}
_bindParam(value, options) {
return options.bindParam(this._binary ? Buffer.from(value) : value);
}
}
STRING.prototype.escape = false;
class TEXT extends BaseTypes.TEXT {
toSql() {
// TEXT is deprecated in mssql and it would normally be saved as a non-unicode string.
// Using unicode is just future proof
if (this._length) {
if (this._length.toLowerCase() === 'tiny') { // tiny = 2^8
warn('MSSQL does not support TEXT with the `length` = `tiny` option. `NVARCHAR(256)` will be used instead.');
return 'NVARCHAR(256)';
}
warn('MSSQL does not support TEXT with the `length` option. `NVARCHAR(MAX)` will be used instead.');
}
return 'NVARCHAR(MAX)';
}
}
class BOOLEAN extends BaseTypes.BOOLEAN {
toSql() {
return 'BIT';
}
}
class UUID extends BaseTypes.UUID {
toSql() {
return 'CHAR(36)';
}
}
class NOW extends BaseTypes.NOW {
toSql() {
return 'GETDATE()';
}
}
class DATE extends BaseTypes.DATE {
toSql() {
return 'DATETIMEOFFSET';
}
}
class DATEONLY extends BaseTypes.DATEONLY {
static parse(value) {
return moment(value).format('YYYY-MM-DD');
}
}
class INTEGER extends BaseTypes.INTEGER {
constructor(length) {
super(length);
removeUnsupportedIntegerOptions(this);
}
}
class TINYINT extends BaseTypes.TINYINT {
constructor(length) {
super(length);
removeUnsupportedIntegerOptions(this);
}
}
class SMALLINT extends BaseTypes.SMALLINT {
constructor(length) {
super(length);
removeUnsupportedIntegerOptions(this);
}
}
class BIGINT extends BaseTypes.BIGINT {
constructor(length) {
super(length);
removeUnsupportedIntegerOptions(this);
}
}
class REAL extends BaseTypes.REAL {
constructor(length, decimals) {
super(length, decimals);
// MSSQL does not support any options for real
if (this._length || this.options.length || this._unsigned || this._zerofill) {
warn('MSSQL does not support REAL with options. Plain `REAL` will be used instead.');
this._length = undefined;
this.options.length = undefined;
this._unsigned = undefined;
this._zerofill = undefined;
}
}
}
class FLOAT extends BaseTypes.FLOAT {
constructor(length, decimals) {
super(length, decimals);
// MSSQL does only support lengths as option.
// Values between 1-24 result in 7 digits precision (4 bytes storage size)
// Values between 25-53 result in 15 digits precision (8 bytes storage size)
// If decimals are provided remove these and print a warning
if (this._decimals) {
warn('MSSQL does not support Float with decimals. Plain `FLOAT` will be used instead.');
this._length = undefined;
this.options.length = undefined;
}
if (this._unsigned) {
warn('MSSQL does not support Float unsigned. `UNSIGNED` was removed.');
this._unsigned = undefined;
}
if (this._zerofill) {
warn('MSSQL does not support Float zerofill. `ZEROFILL` was removed.');
this._zerofill = undefined;
}
}
}
class ENUM extends BaseTypes.ENUM {
toSql() {
return 'VARCHAR(255)';
}
}
return {
BLOB,
BOOLEAN,
ENUM,
STRING,
UUID,
DATE,
DATEONLY,
NOW,
TINYINT,
SMALLINT,
INTEGER,
BIGINT,
REAL,
FLOAT,
TEXT
};
};