@tanstack/db/dist/cjs/query/compiler/order-by.cjs.map

A reactive client store for building super fast apps on sync

{"version":3,"file":"order-by.cjs","sources":["../../../../src/query/compiler/order-by.ts"],"sourcesContent":["import { orderByWithFractionalIndex } from \"@tanstack/db-ivm\"\nimport { ascComparator, descComparator } from \"../../utils/comparison.js\"\nimport { compileExpression } from \"./evaluators.js\"\nimport type { OrderByClause } from \"../ir.js\"\nimport type { NamespacedAndKeyedStream, NamespacedRow } from \"../../types.js\"\nimport type { IStreamBuilder, KeyValue } from \"@tanstack/db-ivm\"\n\n/**\n * Processes the ORDER BY clause\n * Works with the new structure that has both namespaced row data and __select_results\n * Always uses fractional indexing and adds the index as __ordering_index to the result\n */\nexport function processOrderBy(\n  pipeline: NamespacedAndKeyedStream,\n  orderByClause: Array<OrderByClause>,\n  limit?: number,\n  offset?: number\n): IStreamBuilder<KeyValue<unknown, [NamespacedRow, string]>> {\n  // Pre-compile all order by expressions\n  const compiledOrderBy = orderByClause.map((clause) => ({\n    compiledExpression: compileExpression(clause.expression),\n    direction: clause.direction,\n  }))\n\n  // Create a value extractor function for the orderBy operator\n  const valueExtractor = (row: NamespacedRow & { __select_results?: any }) => {\n    // For ORDER BY expressions, we need to provide access to both:\n    // 1. The original namespaced row data (for direct table column references)\n    // 2. The __select_results (for SELECT alias references)\n\n    // Create a merged context for expression evaluation\n    const orderByContext = { ...row }\n\n    // If there are select results, merge them at the top level for alias access\n    if (row.__select_results) {\n      // Add select results as top-level properties for alias access\n      Object.assign(orderByContext, row.__select_results)\n    }\n\n    if (orderByClause.length > 1) {\n      // For multiple orderBy columns, create a composite key\n      return compiledOrderBy.map((compiled) =>\n        compiled.compiledExpression(orderByContext)\n      )\n    } else if (orderByClause.length === 1) {\n      // For a single orderBy column, use the value directly\n      const compiled = compiledOrderBy[0]!\n      return compiled.compiledExpression(orderByContext)\n    }\n\n    // Default case - no ordering\n    return null\n  }\n\n  // Create a multi-property comparator that respects the order and direction of each property\n  const makeComparator = () => {\n    return (a: unknown, b: unknown) => {\n      // If we're comparing arrays (multiple properties), compare each property in order\n      if (orderByClause.length > 1) {\n        const arrayA = a as Array<unknown>\n        const arrayB = b as Array<unknown>\n        for (let i = 0; i < orderByClause.length; i++) {\n          const direction = orderByClause[i]!.direction\n          const compareFn =\n            direction === `desc` ? descComparator : ascComparator\n          const result = compareFn(arrayA[i], arrayB[i])\n          if (result !== 0) {\n            return result\n          }\n        }\n        return arrayA.length - arrayB.length\n      }\n\n      // Single property comparison\n      if (orderByClause.length === 1) {\n        const direction = orderByClause[0]!.direction\n        return direction === `desc` ? descComparator(a, b) : ascComparator(a, b)\n      }\n\n      return ascComparator(a, b)\n    }\n  }\n\n  const comparator = makeComparator()\n\n  // Use fractional indexing and return the tuple [value, index]\n  return pipeline.pipe(\n    orderByWithFractionalIndex(valueExtractor, {\n      limit,\n      offset,\n      comparator,\n    })\n    // orderByWithFractionalIndex returns [key, [value, index]] - we keep this format\n  )\n}\n"],"names":["compileExpression","descComparator","ascComparator","orderByWithFractionalIndex"],"mappings":";;;;;AAYO,SAAS,eACd,UACA,eACA,OACA,QAC4D;AAE5D,QAAM,kBAAkB,cAAc,IAAI,CAAC,YAAY;AAAA,IACrD,oBAAoBA,WAAAA,kBAAkB,OAAO,UAAU;AAAA,IACvD,WAAW,OAAO;AAAA,EAAA,EAClB;AAGF,QAAM,iBAAiB,CAAC,QAAoD;AAM1E,UAAM,iBAAiB,EAAE,GAAG,IAAA;AAG5B,QAAI,IAAI,kBAAkB;AAExB,aAAO,OAAO,gBAAgB,IAAI,gBAAgB;AAAA,IACpD;AAEA,QAAI,cAAc,SAAS,GAAG;AAE5B,aAAO,gBAAgB;AAAA,QAAI,CAAC,aAC1B,SAAS,mBAAmB,cAAc;AAAA,MAAA;AAAA,IAE9C,WAAW,cAAc,WAAW,GAAG;AAErC,YAAM,WAAW,gBAAgB,CAAC;AAClC,aAAO,SAAS,mBAAmB,cAAc;AAAA,IACnD;AAGA,WAAO;AAAA,EACT;AAGA,QAAM,iBAAiB,MAAM;AAC3B,WAAO,CAAC,GAAY,MAAe;AAEjC,UAAI,cAAc,SAAS,GAAG;AAC5B,cAAM,SAAS;AACf,cAAM,SAAS;AACf,iBAAS,IAAI,GAAG,IAAI,cAAc,QAAQ,KAAK;AAC7C,gBAAM,YAAY,cAAc,CAAC,EAAG;AACpC,gBAAM,YACJ,cAAc,SAASC,WAAAA,iBAAiBC,WAAAA;AAC1C,gBAAM,SAAS,UAAU,OAAO,CAAC,GAAG,OAAO,CAAC,CAAC;AAC7C,cAAI,WAAW,GAAG;AAChB,mBAAO;AAAA,UACT;AAAA,QACF;AACA,eAAO,OAAO,SAAS,OAAO;AAAA,MAChC;AAGA,UAAI,cAAc,WAAW,GAAG;AAC9B,cAAM,YAAY,cAAc,CAAC,EAAG;AACpC,eAAO,cAAc,SAASD,WAAAA,eAAe,GAAG,CAAC,IAAIC,WAAAA,cAAc,GAAG,CAAC;AAAA,MACzE;AAEA,aAAOA,WAAAA,cAAc,GAAG,CAAC;AAAA,IAC3B;AAAA,EACF;AAEA,QAAM,aAAa,eAAA;AAGnB,SAAO,SAAS;AAAA,IACdC,MAAAA,2BAA2B,gBAAgB;AAAA,MACzC;AAAA,MACA;AAAA,MACA;AAAA,IAAA,CACD;AAAA;AAAA,EAAA;AAGL;;"}