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import {
aliasedTable,
aliasedTableColumn,
mapColumnsInAliasedSQLToAlias,
mapColumnsInSQLToAlias,
} from 'drizzle-orm/alias'
import { Column } from 'drizzle-orm/column'
import { entityKind, is } from 'drizzle-orm/entity'
import {
type BuildQueryResult,
type DBQueryConfig,
Many,
One,
type Relation,
type TableRelationalConfig,
type TablesRelationalConfig,
getOperators,
getOrderByOperators,
normalizeRelation,
} from 'drizzle-orm/relations'
import { QueryPromise } from 'drizzle-orm/query-promise'
import { and, eq, inArray, or } from 'drizzle-orm/sql/expressions'
import { type SQL, type SQLWrapper, sql as yql } from 'drizzle-orm/sql/sql'
import { getTableUniqueName } from 'drizzle-orm/table'
import type { KnownKeysOnly, ValueOrArray } from 'drizzle-orm/utils'
import type { YdbDialect } from '../../ydb/dialect.js'
import type { YdbPreparedQueryConfig, YdbSession } from '../session.js'
import type { YdbColumn } from '../columns/common.js'
import type { YdbTable } from '../table.js'
function toArray<T>(value: ValueOrArray<T> | undefined): T[] {
Iif (value === undefined) {
return []
}
return Array.isArray(value) ? value : [value]
}
function isNumberValue(value: unknown): value is number {
return typeof value === 'number' && Number.isFinite(value)
}
function dedupeColumns(columns: YdbColumn[]): YdbColumn[] {
let seen = new Set<YdbColumn>()
let result: YdbColumn[] = []
for (let column of columns) {
Iif (seen.has(column)) {
continue
}
seen.add(column)
result.push(column)
}
return result
}
function encodeTuplePart(value: unknown): string {
Iif (typeof value === 'bigint') {
return `bigint:${value.toString()}`
}
Iif (value instanceof Date) {
return `date:${value.toISOString()}`
}
Iif (value instanceof Uint8Array) {
return `bytes:${Buffer.from(value).toString('base64')}`
}
Iif (value === null) {
return 'null:'
}
Iif (value === undefined) {
return 'undefined:'
}
return `${typeof value}:${String(value)}`
}
function getTupleKey(values: unknown[]): string {
return values.map((value) => encodeTuplePart(value)).join('|')
}
type YdbRelationalManyConfig<
TSchema extends TablesRelationalConfig,
TFields extends TableRelationalConfig,
> = DBQueryConfig<'many', true, TSchema, TFields>
type YdbRelationalFirstConfig<
TSchema extends TablesRelationalConfig,
TFields extends TableRelationalConfig,
> = Omit<DBQueryConfig<'many', true, TSchema, TFields>, 'limit'>
type YdbRelationalAnyConfig = DBQueryConfig<'many', boolean>
type YdbVisibleSelectionEntry = {
tsKey: string
alias: string
field: SQLWrapper
}
type YdbSelectedRelation = {
tsKey: string
relation: Relation
relationTableTsName: string
queryConfig: true | DBQueryConfig<'many', false>
normalizedRelation: ReturnType<typeof normalizeRelation>
}
type YdbFlatQueryPlan = {
sql: SQL
tableAlias: string
columnEntries: YdbVisibleSelectionEntry[]
extraEntries: YdbVisibleSelectionEntry[]
hiddenColumnAliases: Map<YdbColumn, string>
selectedRelations: YdbSelectedRelation[]
}
type YdbExecutedLevel = {
plan: YdbFlatQueryPlan
rows: Array<Record<string, unknown>>
values: Array<Record<string, unknown>>
}
type YdbExecuteLevelOptions = {
table: YdbTable
tableConfig: TableRelationalConfig
config: YdbRelationalAnyConfig
tableAlias: string
requiredColumns?: YdbColumn[]
extraWhere?: SQL
applyLimit?: boolean
applyOffset?: boolean
}
let relationalRelationParameterBudget = 256
function chunkRelationTuples(tuples: unknown[][], columnCount: number): unknown[][][] {
let chunkSize = Math.max(
1,
Math.floor(relationalRelationParameterBudget / Math.max(1, columnCount))
)
let chunks: unknown[][][] = []
for (let index = 0; index < tuples.length; index += chunkSize) {
chunks.push(tuples.slice(index, index + chunkSize))
}
return chunks
}
function getSelectedColumnKeys(
tableConfig: TableRelationalConfig,
config: YdbRelationalAnyConfig
): string[] {
if (!config.columns) {
return Object.keys(tableConfig.columns)
}
let explicitEntries = Object.entries(config.columns).filter(
([key, include]) => key in tableConfig.columns && include !== undefined
)
let includeKeys = explicitEntries.filter(([, include]) => include === true).map(([key]) => key)
Eif (includeKeys.length > 0) {
return includeKeys
}
let excludeKeys = new Set(
explicitEntries.filter(([, include]) => include === false).map(([key]) => key)
)
return Object.keys(tableConfig.columns).filter((key) => !excludeKeys.has(key))
}
function getAliasedColumns(
tableConfig: TableRelationalConfig,
tableAlias: string
): Record<string, Column> {
return Object.fromEntries(
Object.entries(tableConfig.columns).map(([key, value]) => [
key,
aliasedTableColumn(value, tableAlias),
])
) as Record<string, Column>
}
function getWhereClause(
tableConfig: TableRelationalConfig,
config: YdbRelationalAnyConfig,
tableAlias: string
): SQL | undefined {
if (config.where === undefined) {
return undefined
}
let aliasedColumns = getAliasedColumns(tableConfig, tableAlias)
let whereSql =
typeof config.where === 'function'
? config.where(aliasedColumns as Record<string, YdbColumn>, getOperators())
: config.where
return whereSql ? mapColumnsInSQLToAlias(whereSql, tableAlias) : undefined
}
function getOrderByClause(
tableConfig: TableRelationalConfig,
config: YdbRelationalAnyConfig,
tableAlias: string
): SQL[] {
if (config.orderBy === undefined) {
return []
}
let aliasedColumns = getAliasedColumns(tableConfig, tableAlias)
let orderBy =
typeof config.orderBy === 'function'
? config.orderBy(aliasedColumns as Record<string, YdbColumn>, getOrderByOperators())
: config.orderBy
return toArray(orderBy).map((field) => {
Iif (is(field, Column)) {
return aliasedTableColumn(field, tableAlias) as unknown as SQL
}
return mapColumnsInSQLToAlias(field as SQL, tableAlias)
})
}
function getLimitClause(config: YdbRelationalAnyConfig): number | undefined {
if (config.limit === undefined) {
return undefined
}
Iif (!isNumberValue(config.limit)) {
throw new Error('YDB relational query limit must be a finite number')
}
return config.limit
}
function getOffsetClause(config: YdbRelationalAnyConfig): number | undefined {
let offset = 'offset' in config ? config.offset : undefined
if (offset === undefined) {
return undefined
}
Iif (!isNumberValue(offset)) {
throw new Error('YDB relational query offset must be a finite number')
}
return offset
}
function getExtrasSelection(
tableConfig: TableRelationalConfig,
config: YdbRelationalAnyConfig,
tableAlias: string
): Array<{ tsKey: string; field: SQL.Aliased }> {
Eif (!config.extras) {
return []
}
let aliasedColumns = getAliasedColumns(tableConfig, tableAlias)
let extras =
typeof config.extras === 'function'
? config.extras(aliasedColumns as Record<string, YdbColumn>, { sql: yql })
: config.extras
return Object.entries(extras).map(([tsKey, value]) => ({
tsKey,
field: mapColumnsInAliasedSQLToAlias(value, tableAlias) as SQL.Aliased,
}))
}
function buildRelationFilter(columns: YdbColumn[], tuples: unknown[][]): SQL {
Iif (columns.length === 0) {
throw new Error('YDB relational relation filter requires at least one column')
}
Eif (columns.length === 1) {
let column = columns[0]!
let values = tuples.map(([value]) => value)
return values.length === 1 ? eq(column, values[0]) : inArray(column, values)
}
if (tuples.length === 1) {
return and(...columns.map((column, index) => eq(column, tuples[0]![index])))!
}
return or(
...tuples.map((tuple) => and(...columns.map((column, index) => eq(column, tuple[index]))))
)!
}
export class YdbRelationalQueryBuilder<
TSchema extends TablesRelationalConfig,
TFields extends TableRelationalConfig,
> {
static readonly [entityKind] = 'YdbRelationalQueryBuilder'
readonly #fullSchema: Record<string, unknown>
readonly #schema: TSchema
readonly #tableNamesMap: Record<string, string>
readonly #table: YdbTable
readonly #tableConfig: TFields
readonly #dialect: YdbDialect
readonly #session: YdbSession
constructor(
fullSchema: Record<string, unknown>,
schema: TSchema,
tableNamesMap: Record<string, string>,
table: YdbTable,
tableConfig: TFields,
dialect: YdbDialect,
session: YdbSession
) {
this.#fullSchema = fullSchema
this.#schema = schema
this.#tableNamesMap = tableNamesMap
this.#table = table
this.#tableConfig = tableConfig
this.#dialect = dialect
this.#session = session
}
findMany<TConfig extends YdbRelationalManyConfig<TSchema, TFields>>(
config?: KnownKeysOnly<TConfig, YdbRelationalManyConfig<TSchema, TFields>>
): YdbRelationalQuery<BuildQueryResult<TSchema, TFields, TConfig>[]> {
return new YdbRelationalQuery(
this.#fullSchema,
this.#schema,
this.#tableNamesMap,
this.#table,
this.#tableConfig,
this.#dialect,
this.#session,
(config ?? {}) as YdbRelationalAnyConfig,
'many'
)
}
findFirst<TConfig extends YdbRelationalFirstConfig<TSchema, TFields>>(
config?: KnownKeysOnly<TConfig, YdbRelationalFirstConfig<TSchema, TFields>>
): YdbRelationalQuery<BuildQueryResult<TSchema, TFields, TConfig> | undefined> {
return new YdbRelationalQuery(
this.#fullSchema,
this.#schema,
this.#tableNamesMap,
this.#table,
this.#tableConfig,
this.#dialect,
this.#session,
{ ...((config ?? {}) as YdbRelationalAnyConfig), limit: 1 },
'first'
)
}
}
export class YdbRelationalQuery<TResult> extends QueryPromise<TResult> {
static override readonly [entityKind] = 'YdbRelationalQuery'
declare readonly _: {
readonly dialect: 'ydb'
readonly result: TResult
}
readonly #fullSchema: Record<string, unknown>
readonly #schema: TablesRelationalConfig
readonly #tableNamesMap: Record<string, string>
readonly #table: YdbTable
readonly #tableConfig: TableRelationalConfig
readonly #dialect: YdbDialect
readonly #session: YdbSession
readonly #config: YdbRelationalAnyConfig
readonly #mode: 'many' | 'first'
constructor(
fullSchema: Record<string, unknown>,
schema: TablesRelationalConfig,
tableNamesMap: Record<string, string>,
table: YdbTable,
tableConfig: TableRelationalConfig,
dialect: YdbDialect,
session: YdbSession,
config: YdbRelationalAnyConfig,
mode: 'many' | 'first'
) {
super()
this.#fullSchema = fullSchema
this.#schema = schema
this.#tableNamesMap = tableNamesMap
this.#table = table
this.#tableConfig = tableConfig
this.#dialect = dialect
this.#session = session
this.#config = config
this.#mode = mode
}
#getSelectedRelations(
tableConfig: TableRelationalConfig,
config: YdbRelationalAnyConfig
): YdbSelectedRelation[] {
if (!config.with) {
return []
}
return Object.entries(config.with).flatMap(([tsKey, queryConfig]) => {
Iif (!queryConfig) {
return []
}
let relation = tableConfig.relations[tsKey]
Iif (!relation) {
throw new Error(
`YDB relational query relation "${tableConfig.tsName}.${tsKey}" is missing`
)
}
let relationTableTsName =
this.#tableNamesMap[getTableUniqueName(relation.referencedTable)]
Iif (!relationTableTsName) {
throw new Error(
`YDB relational query table metadata for "${relation.referencedTableName}" is missing`
)
}
return [
{
tsKey,
relation,
relationTableTsName,
queryConfig: queryConfig as true | DBQueryConfig<'many', false>,
normalizedRelation: normalizeRelation(
this.#schema,
this.#tableNamesMap,
relation
),
},
]
})
}
#buildFlatQueryPlan({
table,
tableConfig,
config,
tableAlias,
requiredColumns = [],
extraWhere,
applyLimit = true,
applyOffset = true,
}: YdbExecuteLevelOptions): YdbFlatQueryPlan {
let selectedRelations = this.#getSelectedRelations(tableConfig, config)
let selectedColumnKeys = getSelectedColumnKeys(tableConfig, config)
let selectedExtras = getExtrasSelection(tableConfig, config, tableAlias)
let columnEntries = selectedColumnKeys.map((tsKey, index) => ({
tsKey,
alias: `__ydb_c${index}`,
field: aliasedTableColumn(tableConfig.columns[tsKey]!, tableAlias),
}))
let extraEntries = selectedExtras.map(({ tsKey, field }, index) => ({
tsKey,
alias: `__ydb_e${index}`,
field,
}))
let hiddenColumnAliases = new Map<YdbColumn, string>()
for (let entry of columnEntries) {
hiddenColumnAliases.set(tableConfig.columns[entry.tsKey] as YdbColumn, entry.alias)
}
let hiddenFields: Array<{ alias: string; field: SQLWrapper }> = []
let hiddenColumns = dedupeColumns([
...requiredColumns,
...selectedRelations.flatMap(
({ normalizedRelation }) => normalizedRelation.fields as YdbColumn[]
),
])
let hiddenIndex = 0
for (let column of hiddenColumns) {
if (hiddenColumnAliases.has(column)) {
continue
}
let alias = `__ydb_h${hiddenIndex++}`
hiddenColumnAliases.set(column, alias)
hiddenFields.push({
alias,
field: aliasedTableColumn(column, tableAlias),
})
}
let fields = [...columnEntries, ...extraEntries, ...hiddenFields]
Iif (fields.length === 0) {
throw new Error(`YDB relational query selected zero fields for "${tableConfig.tsName}"`)
}
let where = and(
extraWhere ? mapColumnsInSQLToAlias(extraWhere, tableAlias) : undefined,
getWhereClause(tableConfig, config, tableAlias)
)
let orderBy = getOrderByClause(tableConfig, config, tableAlias)
let limit = applyLimit ? getLimitClause(config) : undefined
let offset = applyOffset ? getOffsetClause(config) : undefined
return {
sql: this.#dialect.buildSelectQuery({
table: aliasedTable(table, tableAlias),
fields: {},
fieldsFlat: fields.map(({ field }) => ({ path: [], field })),
where,
joins: undefined,
orderBy,
groupBy: undefined,
having: undefined,
limit,
offset,
distinct: false,
distinctOn: undefined,
selectionAliases: fields.map(({ alias }) => alias),
setOperators: [],
}),
tableAlias,
columnEntries,
extraEntries,
hiddenColumnAliases,
selectedRelations,
}
}
#getColumnTuple(
row: Record<string, unknown>,
columns: YdbColumn[],
aliases: Map<YdbColumn, string>
): unknown[] {
return columns.map((column) => {
let alias = aliases.get(column)
Iif (!alias) {
throw new Error(
`YDB relational query hidden alias for column "${column.name}" is missing`
)
}
return row[alias]
})
}
async #executeLevel(options: YdbExecuteLevelOptions): Promise<YdbExecutedLevel> {
let plan = this.#buildFlatQueryPlan(options)
let rows = await this.#session
.prepareQuery<YdbPreparedQueryConfig & { execute: Array<Record<string, unknown>> }>(
plan.sql,
undefined,
undefined,
false
)
.execute()
let values = rows.map((row) => {
let result: Record<string, unknown> = {}
for (let entry of plan.columnEntries) {
result[entry.tsKey] = row[entry.alias]
}
for (let entry of plan.extraEntries) {
result[entry.tsKey] = row[entry.alias]
}
return result
})
for (let relation of plan.selectedRelations) {
await this.#hydrateRelation(plan, rows, values, relation)
}
return { plan, rows, values }
}
async #hydrateRelation(
parentPlan: YdbFlatQueryPlan,
parentRows: Array<Record<string, unknown>>,
parentValues: Array<Record<string, unknown>>,
relationSelection: YdbSelectedRelation
): Promise<void> {
let parentTuples = parentRows
.map((row) =>
this.#getColumnTuple(
row,
relationSelection.normalizedRelation.fields as YdbColumn[],
parentPlan.hiddenColumnAliases
)
)
.filter((tuple) => tuple.every((value) => value !== null && value !== undefined))
Iif (parentTuples.length === 0) {
for (let parentValue of parentValues) {
parentValue[relationSelection.tsKey] = is(relationSelection.relation, One)
? null
: []
}
return
}
let uniqueParentTuples = Array.from(
new Map(parentTuples.map((tuple) => [getTupleKey(tuple), tuple])),
([, tuple]) => tuple
)
let relationTableConfig = this.#schema[relationSelection.relationTableTsName]
let relationTable = this.#fullSchema[relationSelection.relationTableTsName] as
| YdbTable
| undefined
Iif (!relationTableConfig || !relationTable) {
throw new Error(
`YDB relational query table "${relationSelection.relationTableTsName}" is missing`
)
}
let relationConfig =
relationSelection.queryConfig === true
? ({} as YdbRelationalAnyConfig)
: (relationSelection.queryConfig as YdbRelationalAnyConfig)
let referenceColumns = relationSelection.normalizedRelation.references as YdbColumn[]
let relationResults: YdbExecutedLevel[] = []
for (let tupleChunk of chunkRelationTuples(uniqueParentTuples, referenceColumns.length)) {
let relationFilter = buildRelationFilter(referenceColumns, tupleChunk)
let relationResult = await this.#executeLevel({
table: relationTable,
tableConfig: relationTableConfig,
config: relationConfig,
tableAlias: `${parentPlan.tableAlias}_${relationSelection.tsKey}`,
requiredColumns: referenceColumns,
extraWhere: relationFilter,
applyLimit: !is(relationSelection.relation, Many),
applyOffset: !is(relationSelection.relation, Many),
})
relationResults.push(relationResult)
}
let groupedValues = new Map<string, Array<Record<string, unknown>>>()
for (let relationResult of relationResults) {
for (let [index, row] of relationResult.rows.entries()) {
let key = getTupleKey(
this.#getColumnTuple(
row,
referenceColumns,
relationResult.plan.hiddenColumnAliases
)
)
let existing = groupedValues.get(key)
if (existing) {
existing.push(relationResult.values[index]!)
} else {
groupedValues.set(key, [relationResult.values[index]!])
}
}
}
let relationOffset = getOffsetClause(relationConfig) ?? 0
let relationLimit = getLimitClause(relationConfig)
for (let [index, parentValue] of parentValues.entries()) {
let tuple = this.#getColumnTuple(
parentRows[index]!,
relationSelection.normalizedRelation.fields as YdbColumn[],
parentPlan.hiddenColumnAliases
)
Iif (tuple.some((value) => value === null || value === undefined)) {
parentValue[relationSelection.tsKey] = is(relationSelection.relation, One)
? null
: []
continue
}
let relatedValues = groupedValues.get(getTupleKey(tuple)) ?? []
if (is(relationSelection.relation, One)) {
parentValue[relationSelection.tsKey] = relatedValues[0] ?? null
continue
}
let sliced =
relationLimit === undefined
? relatedValues.slice(relationOffset)
: relatedValues.slice(relationOffset, relationOffset + relationLimit)
parentValue[relationSelection.tsKey] = sliced
}
}
getSQL(): SQL {
return this.#buildFlatQueryPlan({
table: this.#table,
tableConfig: this.#tableConfig,
config: this.#config,
tableAlias: this.#tableConfig.tsName,
}).sql
}
async #run(): Promise<TResult> {
let result = await this.#executeLevel({
table: this.#table,
tableConfig: this.#tableConfig,
config: this.#config,
tableAlias: this.#tableConfig.tsName,
})
if (this.#mode === 'first') {
return result.values[0] as TResult | undefined as TResult
}
return result.values as TResult
}
prepare(name?: string) {
let flatPrepared = this.#session.prepareQuery(this.getSQL(), undefined, name, false)
return {
getQuery: () => {
return flatPrepared.getQuery()
},
execute: async () => {
return this.#run()
},
all: async () => {
let result = await this.#run()
if (Array.isArray(result)) {
return result
}
return result === undefined ? [] : [result]
},
get: async () => {
let result = await this.#run()
return Array.isArray(result) ? result[0] : result
},
values: async () => {
return flatPrepared.values()
},
}
}
toSQL() {
let prepared = this.prepare()
let { typings: _typings, ...query } = prepared.getQuery()
return query
}
override execute(): Promise<TResult> {
return this.#run()
}
}
|