lib/dialects/mssql/query-generator.js
'use strict';
const _ = require('lodash');
const Utils = require('../../utils');
const DataTypes = require('../../data-types');
const TableHints = require('../../table-hints');
const AbstractQueryGenerator = require('../abstract/query-generator');
const randomBytes = require('crypto').randomBytes;
const semver = require('semver');
const Op = require('../../operators');
/* istanbul ignore next */
const throwMethodUndefined = function(methodName) {
throw new Error(`The method "${methodName}" is not defined! Please add it to your sql dialect.`);
};
class MSSQLQueryGenerator extends AbstractQueryGenerator {
createDatabaseQuery(databaseName, options) {
options = Object.assign({
collate: null
}, options || {});
const collation = options.collate ? `COLLATE ${this.escape(options.collate)}` : '';
return [
'IF NOT EXISTS (SELECT * FROM sys.databases WHERE name =', wrapSingleQuote(databaseName), ')',
'BEGIN',
'CREATE DATABASE', this.quoteIdentifier(databaseName),
`${collation};`,
'END;'
].join(' ');
}
dropDatabaseQuery(databaseName) {
return [
'IF EXISTS (SELECT * FROM sys.databases WHERE name =', wrapSingleQuote(databaseName), ')',
'BEGIN',
'DROP DATABASE', this.quoteIdentifier(databaseName), ';',
'END;'
].join(' ');
}
createSchema(schema) {
return [
'IF NOT EXISTS (SELECT schema_name',
'FROM information_schema.schemata',
'WHERE schema_name =', wrapSingleQuote(schema), ')',
'BEGIN',
"EXEC sp_executesql N'CREATE SCHEMA",
this.quoteIdentifier(schema),
";'",
'END;'
].join(' ');
}
dropSchema(schema) {
// Mimics Postgres CASCADE, will drop objects belonging to the schema
const quotedSchema = wrapSingleQuote(schema);
return [
'IF EXISTS (SELECT schema_name',
'FROM information_schema.schemata',
'WHERE schema_name =', quotedSchema, ')',
'BEGIN',
'DECLARE @id INT, @ms_sql NVARCHAR(2000);',
'DECLARE @cascade TABLE (',
'id INT NOT NULL IDENTITY PRIMARY KEY,',
'ms_sql NVARCHAR(2000) NOT NULL );',
'INSERT INTO @cascade ( ms_sql )',
"SELECT CASE WHEN o.type IN ('F','PK')",
"THEN N'ALTER TABLE ['+ s.name + N'].[' + p.name + N'] DROP CONSTRAINT [' + o.name + N']'",
"ELSE N'DROP TABLE ['+ s.name + N'].[' + o.name + N']' END",
'FROM sys.objects o',
'JOIN sys.schemas s on o.schema_id = s.schema_id',
'LEFT OUTER JOIN sys.objects p on o.parent_object_id = p.object_id',
"WHERE o.type IN ('F', 'PK', 'U') AND s.name = ", quotedSchema,
'ORDER BY o.type ASC;',
'SELECT TOP 1 @id = id, @ms_sql = ms_sql FROM @cascade ORDER BY id;',
'WHILE @id IS NOT NULL',
'BEGIN',
'BEGIN TRY EXEC sp_executesql @ms_sql; END TRY',
'BEGIN CATCH BREAK; THROW; END CATCH;',
'DELETE FROM @cascade WHERE id = @id;',
'SELECT @id = NULL, @ms_sql = NULL;',
'SELECT TOP 1 @id = id, @ms_sql = ms_sql FROM @cascade ORDER BY id;',
'END',
"EXEC sp_executesql N'DROP SCHEMA", this.quoteIdentifier(schema), ";'",
'END;'
].join(' ');
}
showSchemasQuery() {
return [
'SELECT "name" as "schema_name" FROM sys.schemas as s',
'WHERE "s"."name" NOT IN (',
"'INFORMATION_SCHEMA', 'dbo', 'guest', 'sys', 'archive'",
')', 'AND', '"s"."name" NOT LIKE', "'db_%'"
].join(' ');
}
versionQuery() {
// Uses string manipulation to convert the MS Maj.Min.Patch.Build to semver Maj.Min.Patch
return [
'DECLARE @ms_ver NVARCHAR(20);',
"SET @ms_ver = REVERSE(CONVERT(NVARCHAR(20), SERVERPROPERTY('ProductVersion')));",
"SELECT REVERSE(SUBSTRING(@ms_ver, CHARINDEX('.', @ms_ver)+1, 20)) AS 'version'"
].join(' ');
}
createTableQuery(tableName, attributes, options) {
const query = (table, attrs) => `IF OBJECT_ID('${table}', 'U') IS NULL CREATE TABLE ${table} (${attrs})`,
primaryKeys = [],
foreignKeys = {},
attrStr = [];
let commentStr = '';
for (const attr in attributes) {
if (Object.prototype.hasOwnProperty.call(attributes, attr)) {
let dataType = attributes[attr];
let match;
if (dataType.includes('COMMENT ')) {
const commentMatch = dataType.match(/^(.+) (COMMENT.*)$/);
const commentText = commentMatch[2].replace('COMMENT', '').trim();
commentStr += this.commentTemplate(commentText, tableName, attr);
// remove comment related substring from dataType
dataType = commentMatch[1];
}
if (dataType.includes('PRIMARY KEY')) {
primaryKeys.push(attr);
if (dataType.includes('REFERENCES')) {
// MSSQL doesn't support inline REFERENCES declarations: move to the end
match = dataType.match(/^(.+) (REFERENCES.*)$/);
attrStr.push(`${this.quoteIdentifier(attr)} ${match[1].replace('PRIMARY KEY', '')}`);
foreignKeys[attr] = match[2];
} else {
attrStr.push(`${this.quoteIdentifier(attr)} ${dataType.replace('PRIMARY KEY', '')}`);
}
} else if (dataType.includes('REFERENCES')) {
// MSSQL doesn't support inline REFERENCES declarations: move to the end
match = dataType.match(/^(.+) (REFERENCES.*)$/);
attrStr.push(`${this.quoteIdentifier(attr)} ${match[1]}`);
foreignKeys[attr] = match[2];
} else {
attrStr.push(`${this.quoteIdentifier(attr)} ${dataType}`);
}
}
}
let attributesClause = attrStr.join(', ');
const pkString = primaryKeys.map(pk => this.quoteIdentifier(pk)).join(', ');
if (options.uniqueKeys) {
_.each(options.uniqueKeys, (columns, indexName) => {
if (columns.customIndex) {
if (typeof indexName !== 'string') {
indexName = `uniq_${tableName}_${columns.fields.join('_')}`;
}
attributesClause += `, CONSTRAINT ${this.quoteIdentifier(indexName)} UNIQUE (${columns.fields.map(field => this.quoteIdentifier(field)).join(', ')})`;
}
});
}
if (pkString.length > 0) {
attributesClause += `, PRIMARY KEY (${pkString})`;
}
for (const fkey in foreignKeys) {
if (Object.prototype.hasOwnProperty.call(foreignKeys, fkey)) {
attributesClause += `, FOREIGN KEY (${this.quoteIdentifier(fkey)}) ${foreignKeys[fkey]}`;
}
}
return `${query(this.quoteTable(tableName), attributesClause)};${commentStr}`;
}
describeTableQuery(tableName, schema) {
let sql = [
'SELECT',
"c.COLUMN_NAME AS 'Name',",
"c.DATA_TYPE AS 'Type',",
"c.CHARACTER_MAXIMUM_LENGTH AS 'Length',",
"c.IS_NULLABLE as 'IsNull',",
"COLUMN_DEFAULT AS 'Default',",
"pk.CONSTRAINT_TYPE AS 'Constraint',",
"COLUMNPROPERTY(OBJECT_ID(c.TABLE_SCHEMA+'.'+c.TABLE_NAME), c.COLUMN_NAME, 'IsIdentity') as 'IsIdentity',",
"prop.value AS 'Comment'",
'FROM',
'INFORMATION_SCHEMA.TABLES t',
'INNER JOIN',
'INFORMATION_SCHEMA.COLUMNS c ON t.TABLE_NAME = c.TABLE_NAME AND t.TABLE_SCHEMA = c.TABLE_SCHEMA',
'LEFT JOIN (SELECT tc.table_schema, tc.table_name, ',
'cu.column_name, tc.CONSTRAINT_TYPE ',
'FROM INFORMATION_SCHEMA.TABLE_CONSTRAINTS tc ',
'JOIN INFORMATION_SCHEMA.KEY_COLUMN_USAGE cu ',
'ON tc.table_schema=cu.table_schema and tc.table_name=cu.table_name ',
'and tc.constraint_name=cu.constraint_name ',
'and tc.CONSTRAINT_TYPE=\'PRIMARY KEY\') pk ',
'ON pk.table_schema=c.table_schema ',
'AND pk.table_name=c.table_name ',
'AND pk.column_name=c.column_name ',
'INNER JOIN sys.columns AS sc',
"ON sc.object_id = object_id(t.table_schema + '.' + t.table_name) AND sc.name = c.column_name",
'LEFT JOIN sys.extended_properties prop ON prop.major_id = sc.object_id',
'AND prop.minor_id = sc.column_id',
"AND prop.name = 'MS_Description'",
'WHERE t.TABLE_NAME =', wrapSingleQuote(tableName)
].join(' ');
if (schema) {
sql += `AND t.TABLE_SCHEMA =${wrapSingleQuote(schema)}`;
}
return sql;
}
renameTableQuery(before, after) {
return `EXEC sp_rename ${this.quoteTable(before)}, ${this.quoteTable(after)};`;
}
showTablesQuery() {
return "SELECT TABLE_NAME, TABLE_SCHEMA FROM INFORMATION_SCHEMA.TABLES WHERE TABLE_TYPE = 'BASE TABLE';";
}
dropTableQuery(tableName) {
const qouteTbl = this.quoteTable(tableName);
return `IF OBJECT_ID('${qouteTbl}', 'U') IS NOT NULL DROP TABLE ${qouteTbl};`;
}
addColumnQuery(table, key, dataType) {
// FIXME: attributeToSQL SHOULD be using attributes in addColumnQuery
// but instead we need to pass the key along as the field here
dataType.field = key;
let commentStr = '';
if (dataType.comment && _.isString(dataType.comment)) {
commentStr = this.commentTemplate(dataType.comment, table, key);
// attributeToSQL will try to include `COMMENT 'Comment Text'` when it returns if the comment key
// is present. This is needed for createTable statement where that part is extracted with regex.
// Here we can intercept the object and remove comment property since we have the original object.
delete dataType['comment'];
}
const def = this.attributeToSQL(dataType, {
context: 'addColumn'
});
return `ALTER TABLE ${this.quoteTable(table)} ADD ${this.quoteIdentifier(key)} ${def};${commentStr}`;
}
commentTemplate(comment, table, column) {
return ' EXEC sp_addextendedproperty ' +
`@name = N'MS_Description', @value = ${this.escape(comment)}, ` +
'@level0type = N\'Schema\', @level0name = \'dbo\', ' +
`@level1type = N'Table', @level1name = ${this.quoteIdentifier(table)}, ` +
`@level2type = N'Column', @level2name = ${this.quoteIdentifier(column)};`;
}
removeColumnQuery(tableName, attributeName) {
return `ALTER TABLE ${this.quoteTable(tableName)} DROP COLUMN ${this.quoteIdentifier(attributeName)};`;
}
changeColumnQuery(tableName, attributes) {
const attrString = [],
constraintString = [];
let commentString = '';
for (const attributeName in attributes) {
const quotedAttrName = this.quoteIdentifier(attributeName);
let definition = attributes[attributeName];
if (definition.includes('COMMENT ')) {
const commentMatch = definition.match(/^(.+) (COMMENT.*)$/);
const commentText = commentMatch[2].replace('COMMENT', '').trim();
commentString += this.commentTemplate(commentText, tableName, attributeName);
// remove comment related substring from dataType
definition = commentMatch[1];
}
if (definition.includes('REFERENCES')) {
constraintString.push(`FOREIGN KEY (${quotedAttrName}) ${definition.replace(/.+?(?=REFERENCES)/, '')}`);
} else {
attrString.push(`${quotedAttrName} ${definition}`);
}
}
let finalQuery = '';
if (attrString.length) {
finalQuery += `ALTER COLUMN ${attrString.join(', ')}`;
finalQuery += constraintString.length ? ' ' : '';
}
if (constraintString.length) {
finalQuery += `ADD ${constraintString.join(', ')}`;
}
return `ALTER TABLE ${this.quoteTable(tableName)} ${finalQuery};${commentString}`;
}
renameColumnQuery(tableName, attrBefore, attributes) {
const newName = Object.keys(attributes)[0];
return `EXEC sp_rename '${this.quoteTable(tableName)}.${attrBefore}', '${newName}', 'COLUMN';`;
}
bulkInsertQuery(tableName, attrValueHashes, options, attributes) {
const quotedTable = this.quoteTable(tableName);
options = options || {};
attributes = attributes || {};
const tuples = [];
const allAttributes = [];
const allQueries = [];
let needIdentityInsertWrapper = false,
outputFragment = '';
if (options.returning) {
outputFragment = ' OUTPUT INSERTED.*';
}
const emptyQuery = `INSERT INTO ${quotedTable}${outputFragment} DEFAULT VALUES`;
attrValueHashes.forEach(attrValueHash => {
// special case for empty objects with primary keys
const fields = Object.keys(attrValueHash);
const firstAttr = attributes[fields[0]];
if (fields.length === 1 && firstAttr && firstAttr.autoIncrement && attrValueHash[fields[0]] === null) {
allQueries.push(emptyQuery);
return;
}
// normal case
_.forOwn(attrValueHash, (value, key) => {
if (value !== null && attributes[key] && attributes[key].autoIncrement) {
needIdentityInsertWrapper = true;
}
if (!allAttributes.includes(key)) {
if (value === null && attributes[key] && attributes[key].autoIncrement)
return;
allAttributes.push(key);
}
});
});
if (allAttributes.length > 0) {
attrValueHashes.forEach(attrValueHash => {
tuples.push(`(${
allAttributes.map(key =>
this.escape(attrValueHash[key])).join(',')
})`);
});
const quotedAttributes = allAttributes.map(attr => this.quoteIdentifier(attr)).join(',');
allQueries.push(tupleStr => `INSERT INTO ${quotedTable} (${quotedAttributes})${outputFragment} VALUES ${tupleStr};`);
}
const commands = [];
let offset = 0;
const batch = Math.floor(250 / (allAttributes.length + 1)) + 1;
while (offset < Math.max(tuples.length, 1)) {
const tupleStr = tuples.slice(offset, Math.min(tuples.length, offset + batch));
let generatedQuery = allQueries.map(v => typeof v === 'string' ? v : v(tupleStr)).join(';');
if (needIdentityInsertWrapper) {
generatedQuery = `SET IDENTITY_INSERT ${quotedTable} ON; ${generatedQuery}; SET IDENTITY_INSERT ${quotedTable} OFF;`;
}
commands.push(generatedQuery);
offset += batch;
}
return commands.join(';');
}
updateQuery(tableName, attrValueHash, where, options, attributes) {
const sql = super.updateQuery(tableName, attrValueHash, where, options, attributes);
if (options.limit) {
const updateArgs = `UPDATE TOP(${this.escape(options.limit)})`;
sql.query = sql.query.replace('UPDATE', updateArgs);
}
return sql;
}
upsertQuery(tableName, insertValues, updateValues, where, model) {
const targetTableAlias = this.quoteTable(`${tableName}_target`);
const sourceTableAlias = this.quoteTable(`${tableName}_source`);
const primaryKeysAttrs = [];
const identityAttrs = [];
const uniqueAttrs = [];
const tableNameQuoted = this.quoteTable(tableName);
let needIdentityInsertWrapper = false;
//Obtain primaryKeys, uniquekeys and identity attrs from rawAttributes as model is not passed
for (const key in model.rawAttributes) {
if (model.rawAttributes[key].primaryKey) {
primaryKeysAttrs.push(model.rawAttributes[key].field || key);
}
if (model.rawAttributes[key].unique) {
uniqueAttrs.push(model.rawAttributes[key].field || key);
}
if (model.rawAttributes[key].autoIncrement) {
identityAttrs.push(model.rawAttributes[key].field || key);
}
}
//Add unique indexes defined by indexes option to uniqueAttrs
for (const index of model._indexes) {
if (index.unique && index.fields) {
for (const field of index.fields) {
const fieldName = typeof field === 'string' ? field : field.name || field.attribute;
if (!uniqueAttrs.includes(fieldName) && model.rawAttributes[fieldName]) {
uniqueAttrs.push(fieldName);
}
}
}
}
const updateKeys = Object.keys(updateValues);
const insertKeys = Object.keys(insertValues);
const insertKeysQuoted = insertKeys.map(key => this.quoteIdentifier(key)).join(', ');
const insertValuesEscaped = insertKeys.map(key => this.escape(insertValues[key])).join(', ');
const sourceTableQuery = `VALUES(${insertValuesEscaped})`; //Virtual Table
let joinCondition;
//IDENTITY_INSERT Condition
identityAttrs.forEach(key => {
if (updateValues[key] && updateValues[key] !== null) {
needIdentityInsertWrapper = true;
/*
* IDENTITY_INSERT Column Cannot be updated, only inserted
* http://stackoverflow.com/a/30176254/2254360
*/
}
});
//Filter NULL Clauses
const clauses = where[Op.or].filter(clause => {
let valid = true;
/*
* Exclude NULL Composite PK/UK. Partial Composite clauses should also be excluded as it doesn't guarantee a single row
*/
for (const key in clause) {
if (!clause[key]) {
valid = false;
break;
}
}
return valid;
});
/*
* Generate ON condition using PK(s).
* If not, generate using UK(s). Else throw error
*/
const getJoinSnippet = array => {
return array.map(key => {
key = this.quoteIdentifier(key);
return `${targetTableAlias}.${key} = ${sourceTableAlias}.${key}`;
});
};
if (clauses.length === 0) {
throw new Error('Primary Key or Unique key should be passed to upsert query');
} else {
// Search for primary key attribute in clauses -- Model can have two separate unique keys
for (const key in clauses) {
const keys = Object.keys(clauses[key]);
if (primaryKeysAttrs.includes(keys[0])) {
joinCondition = getJoinSnippet(primaryKeysAttrs).join(' AND ');
break;
}
}
if (!joinCondition) {
joinCondition = getJoinSnippet(uniqueAttrs).join(' AND ');
}
}
// Remove the IDENTITY_INSERT Column from update
const updateSnippet = updateKeys.filter(key => !identityAttrs.includes(key))
.map(key => {
const value = this.escape(updateValues[key]);
key = this.quoteIdentifier(key);
return `${targetTableAlias}.${key} = ${value}`;
}).join(', ');
const insertSnippet = `(${insertKeysQuoted}) VALUES(${insertValuesEscaped})`;
let query = `MERGE INTO ${tableNameQuoted} WITH(HOLDLOCK) AS ${targetTableAlias} USING (${sourceTableQuery}) AS ${sourceTableAlias}(${insertKeysQuoted}) ON ${joinCondition}`;
query += ` WHEN MATCHED THEN UPDATE SET ${updateSnippet} WHEN NOT MATCHED THEN INSERT ${insertSnippet} OUTPUT $action, INSERTED.*;`;
if (needIdentityInsertWrapper) {
query = `SET IDENTITY_INSERT ${tableNameQuoted} ON; ${query} SET IDENTITY_INSERT ${tableNameQuoted} OFF;`;
}
return query;
}
truncateTableQuery(tableName) {
return `TRUNCATE TABLE ${this.quoteTable(tableName)}`;
}
deleteQuery(tableName, where, options = {}, model) {
const table = this.quoteTable(tableName);
let whereClause = this.getWhereConditions(where, null, model, options);
let limit = '';
if (options.limit) {
limit = ` TOP(${this.escape(options.limit)})`;
}
if (whereClause) {
whereClause = ` WHERE ${whereClause}`;
}
return `DELETE${limit} FROM ${table}${whereClause}; SELECT @@ROWCOUNT AS AFFECTEDROWS;`;
}
showIndexesQuery(tableName) {
return `EXEC sys.sp_helpindex @objname = N'${this.quoteTable(tableName)}';`;
}
showConstraintsQuery(tableName) {
return `EXEC sp_helpconstraint @objname = ${this.escape(this.quoteTable(tableName))};`;
}
removeIndexQuery(tableName, indexNameOrAttributes) {
let indexName = indexNameOrAttributes;
if (typeof indexName !== 'string') {
indexName = Utils.underscore(`${tableName}_${indexNameOrAttributes.join('_')}`);
}
return `DROP INDEX ${this.quoteIdentifiers(indexName)} ON ${this.quoteIdentifiers(tableName)}`;
}
attributeToSQL(attribute) {
if (!_.isPlainObject(attribute)) {
attribute = {
type: attribute
};
}
// handle self referential constraints
if (attribute.references) {
if (attribute.Model && attribute.Model.tableName === attribute.references.model) {
this.sequelize.log('MSSQL does not support self referencial constraints, '
+ 'we will remove it but we recommend restructuring your query');
attribute.onDelete = '';
attribute.onUpdate = '';
}
}
let template;
if (attribute.type instanceof DataTypes.ENUM) {
if (attribute.type.values && !attribute.values) attribute.values = attribute.type.values;
// enums are a special case
template = attribute.type.toSql();
template += ` CHECK (${this.quoteIdentifier(attribute.field)} IN(${attribute.values.map(value => {
return this.escape(value);
}).join(', ') }))`;
return template;
}
template = attribute.type.toString();
if (attribute.allowNull === false) {
template += ' NOT NULL';
} else if (!attribute.primaryKey && !Utils.defaultValueSchemable(attribute.defaultValue)) {
template += ' NULL';
}
if (attribute.autoIncrement) {
template += ' IDENTITY(1,1)';
}
// Blobs/texts cannot have a defaultValue
if (attribute.type !== 'TEXT' && attribute.type._binary !== true &&
Utils.defaultValueSchemable(attribute.defaultValue)) {
template += ` DEFAULT ${this.escape(attribute.defaultValue)}`;
}
if (attribute.unique === true) {
template += ' UNIQUE';
}
if (attribute.primaryKey) {
template += ' PRIMARY KEY';
}
if (attribute.references) {
template += ` REFERENCES ${this.quoteTable(attribute.references.model)}`;
if (attribute.references.key) {
template += ` (${this.quoteIdentifier(attribute.references.key)})`;
} else {
template += ` (${this.quoteIdentifier('id')})`;
}
if (attribute.onDelete) {
template += ` ON DELETE ${attribute.onDelete.toUpperCase()}`;
}
if (attribute.onUpdate) {
template += ` ON UPDATE ${attribute.onUpdate.toUpperCase()}`;
}
}
if (attribute.comment && typeof attribute.comment === 'string') {
template += ` COMMENT ${attribute.comment}`;
}
return template;
}
attributesToSQL(attributes, options) {
const result = {},
existingConstraints = [];
let key,
attribute;
for (key in attributes) {
attribute = attributes[key];
if (attribute.references) {
if (existingConstraints.includes(attribute.references.model.toString())) {
// no cascading constraints to a table more than once
attribute.onDelete = '';
attribute.onUpdate = '';
} else {
existingConstraints.push(attribute.references.model.toString());
// NOTE: this really just disables cascading updates for all
// definitions. Can be made more robust to support the
// few cases where MSSQL actually supports them
attribute.onUpdate = '';
}
}
if (key && !attribute.field) attribute.field = key;
result[attribute.field || key] = this.attributeToSQL(attribute, options);
}
return result;
}
createTrigger() {
throwMethodUndefined('createTrigger');
}
dropTrigger() {
throwMethodUndefined('dropTrigger');
}
renameTrigger() {
throwMethodUndefined('renameTrigger');
}
createFunction() {
throwMethodUndefined('createFunction');
}
dropFunction() {
throwMethodUndefined('dropFunction');
}
renameFunction() {
throwMethodUndefined('renameFunction');
}
/**
* Generate common SQL prefix for ForeignKeysQuery.
*
* @param {string} catalogName
* @returns {string}
*/
_getForeignKeysQueryPrefix(catalogName) {
return `${'SELECT ' +
'constraint_name = OBJ.NAME, ' +
'constraintName = OBJ.NAME, '}${
catalogName ? `constraintCatalog = '${catalogName}', ` : ''
}constraintSchema = SCHEMA_NAME(OBJ.SCHEMA_ID), ` +
'tableName = TB.NAME, ' +
`tableSchema = SCHEMA_NAME(TB.SCHEMA_ID), ${
catalogName ? `tableCatalog = '${catalogName}', ` : ''
}columnName = COL.NAME, ` +
`referencedTableSchema = SCHEMA_NAME(RTB.SCHEMA_ID), ${
catalogName ? `referencedCatalog = '${catalogName}', ` : ''
}referencedTableName = RTB.NAME, ` +
'referencedColumnName = RCOL.NAME ' +
'FROM sys.foreign_key_columns FKC ' +
'INNER JOIN sys.objects OBJ ON OBJ.OBJECT_ID = FKC.CONSTRAINT_OBJECT_ID ' +
'INNER JOIN sys.tables TB ON TB.OBJECT_ID = FKC.PARENT_OBJECT_ID ' +
'INNER JOIN sys.columns COL ON COL.COLUMN_ID = PARENT_COLUMN_ID AND COL.OBJECT_ID = TB.OBJECT_ID ' +
'INNER JOIN sys.tables RTB ON RTB.OBJECT_ID = FKC.REFERENCED_OBJECT_ID ' +
'INNER JOIN sys.columns RCOL ON RCOL.COLUMN_ID = REFERENCED_COLUMN_ID AND RCOL.OBJECT_ID = RTB.OBJECT_ID';
}
/**
* Generates an SQL query that returns all foreign keys details of a table.
*
* @param {string|Object} table
* @param {string} catalogName database name
* @returns {string}
*/
getForeignKeysQuery(table, catalogName) {
const tableName = table.tableName || table;
let sql = `${this._getForeignKeysQueryPrefix(catalogName)
} WHERE TB.NAME =${wrapSingleQuote(tableName)}`;
if (table.schema) {
sql += ` AND SCHEMA_NAME(TB.SCHEMA_ID) =${wrapSingleQuote(table.schema)}`;
}
return sql;
}
getForeignKeyQuery(table, attributeName) {
const tableName = table.tableName || table;
let sql = `${this._getForeignKeysQueryPrefix()
} WHERE TB.NAME =${wrapSingleQuote(tableName)
} AND COL.NAME =${wrapSingleQuote(attributeName)}`;
if (table.schema) {
sql += ` AND SCHEMA_NAME(TB.SCHEMA_ID) =${wrapSingleQuote(table.schema)}`;
}
return sql;
}
getPrimaryKeyConstraintQuery(table, attributeName) {
const tableName = wrapSingleQuote(table.tableName || table);
return [
'SELECT K.TABLE_NAME AS tableName,',
'K.COLUMN_NAME AS columnName,',
'K.CONSTRAINT_NAME AS constraintName',
'FROM INFORMATION_SCHEMA.TABLE_CONSTRAINTS AS C',
'JOIN INFORMATION_SCHEMA.KEY_COLUMN_USAGE AS K',
'ON C.TABLE_NAME = K.TABLE_NAME',
'AND C.CONSTRAINT_CATALOG = K.CONSTRAINT_CATALOG',
'AND C.CONSTRAINT_SCHEMA = K.CONSTRAINT_SCHEMA',
'AND C.CONSTRAINT_NAME = K.CONSTRAINT_NAME',
'WHERE C.CONSTRAINT_TYPE = \'PRIMARY KEY\'',
`AND K.COLUMN_NAME = ${wrapSingleQuote(attributeName)}`,
`AND K.TABLE_NAME = ${tableName};`
].join(' ');
}
dropForeignKeyQuery(tableName, foreignKey) {
return `ALTER TABLE ${this.quoteTable(tableName)} DROP ${this.quoteIdentifier(foreignKey)}`;
}
getDefaultConstraintQuery(tableName, attributeName) {
const quotedTable = this.quoteTable(tableName);
return 'SELECT name FROM sys.default_constraints ' +
`WHERE PARENT_OBJECT_ID = OBJECT_ID('${quotedTable}', 'U') ` +
`AND PARENT_COLUMN_ID = (SELECT column_id FROM sys.columns WHERE NAME = ('${attributeName}') ` +
`AND object_id = OBJECT_ID('${quotedTable}', 'U'));`;
}
dropConstraintQuery(tableName, constraintName) {
return `ALTER TABLE ${this.quoteTable(tableName)} DROP CONSTRAINT ${this.quoteIdentifier(constraintName)};`;
}
setIsolationLevelQuery() {
}
generateTransactionId() {
return randomBytes(10).toString('hex');
}
startTransactionQuery(transaction) {
if (transaction.parent) {
return `SAVE TRANSACTION ${this.quoteIdentifier(transaction.name)};`;
}
return 'BEGIN TRANSACTION;';
}
commitTransactionQuery(transaction) {
if (transaction.parent) {
return;
}
return 'COMMIT TRANSACTION;';
}
rollbackTransactionQuery(transaction) {
if (transaction.parent) {
return `ROLLBACK TRANSACTION ${this.quoteIdentifier(transaction.name)};`;
}
return 'ROLLBACK TRANSACTION;';
}
selectFromTableFragment(options, model, attributes, tables, mainTableAs, where) {
let topFragment = '';
let mainFragment = `SELECT ${attributes.join(', ')} FROM ${tables}`;
// Handle SQL Server 2008 with TOP instead of LIMIT
if (semver.valid(this.sequelize.options.databaseVersion) && semver.lt(this.sequelize.options.databaseVersion, '11.0.0')) {
if (options.limit) {
topFragment = `TOP ${options.limit} `;
}
if (options.offset) {
const offset = options.offset || 0,
isSubQuery = options.hasIncludeWhere || options.hasIncludeRequired || options.hasMultiAssociation;
let orders = { mainQueryOrder: [] };
if (options.order) {
orders = this.getQueryOrders(options, model, isSubQuery);
}
if (!orders.mainQueryOrder.length) {
orders.mainQueryOrder.push(this.quoteIdentifier(model.primaryKeyField));
}
const tmpTable = mainTableAs ? mainTableAs : 'OffsetTable';
const whereFragment = where ? ` WHERE ${where}` : '';
/*
* For earlier versions of SQL server, we need to nest several queries
* in order to emulate the OFFSET behavior.
*
* 1. The outermost query selects all items from the inner query block.
* This is due to a limitation in SQL server with the use of computed
* columns (e.g. SELECT ROW_NUMBER()...AS x) in WHERE clauses.
* 2. The next query handles the LIMIT and OFFSET behavior by getting
* the TOP N rows of the query where the row number is > OFFSET
* 3. The innermost query is the actual set we want information from
*/
const fragment = `SELECT TOP 100 PERCENT ${attributes.join(', ')} FROM ` +
`(SELECT ${topFragment}*` +
` FROM (SELECT ROW_NUMBER() OVER (ORDER BY ${orders.mainQueryOrder.join(', ')}) as row_num, * ` +
` FROM ${tables} AS ${tmpTable}${whereFragment})` +
` AS ${tmpTable} WHERE row_num > ${offset})` +
` AS ${tmpTable}`;
return fragment;
}
mainFragment = `SELECT ${topFragment}${attributes.join(', ')} FROM ${tables}`;
}
if (mainTableAs) {
mainFragment += ` AS ${mainTableAs}`;
}
if (options.tableHint && TableHints[options.tableHint]) {
mainFragment += ` WITH (${TableHints[options.tableHint]})`;
}
return mainFragment;
}
addLimitAndOffset(options, model) {
// Skip handling of limit and offset as postfixes for older SQL Server versions
if (semver.valid(this.sequelize.options.databaseVersion) && semver.lt(this.sequelize.options.databaseVersion, '11.0.0')) {
return '';
}
const offset = options.offset || 0;
const isSubQuery = options.subQuery === undefined
? options.hasIncludeWhere || options.hasIncludeRequired || options.hasMultiAssociation
: options.subQuery;
let fragment = '';
let orders = {};
if (options.order) {
orders = this.getQueryOrders(options, model, isSubQuery);
}
if (options.limit || options.offset) {
if (!options.order || options.include && !orders.subQueryOrder.length) {
fragment += options.order && !isSubQuery ? ', ' : ' ORDER BY ';
fragment += `${this.quoteTable(options.tableAs || model.name)}.${this.quoteIdentifier(model.primaryKeyField)}`;
}
if (options.offset || options.limit) {
fragment += ` OFFSET ${this.escape(offset)} ROWS`;
}
if (options.limit) {
fragment += ` FETCH NEXT ${this.escape(options.limit)} ROWS ONLY`;
}
}
return fragment;
}
booleanValue(value) {
return value ? 1 : 0;
}
}
// private methods
function wrapSingleQuote(identifier) {
return Utils.addTicks(Utils.removeTicks(identifier, "'"), "'");
}
module.exports = MSSQLQueryGenerator;
