@neo4j/cypher-builder
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A programmatic API for building Cypher queries for Neo4j
52 lines (51 loc) • 1.51 kB
JavaScript
;
/*
* Copyright (c) "Neo4j"
* Neo4j Sweden AB [http://neo4j.com]
*/
Object.defineProperty(exports, "__esModule", { value: true });
exports.Union = void 0;
const pad_block_1 = require("../utils/pad-block");
const Clause_1 = require("./Clause");
/**
* @see {@link https://neo4j.com/docs/cypher-manual/current/clauses/union/ | Cypher Documentation}
* @group Clauses
*/
class Union extends Clause_1.Clause {
subqueries = [];
unionType;
constructor(...subqueries) {
super();
this.subqueries = subqueries.map((s) => s.getRoot());
this.addChildren(...subqueries);
}
all() {
this.unionType = "ALL";
return this;
}
/**
* Adds the clause `DISTINCT` after `UNION`
* @since Neo4j.19
*/
distinct() {
this.unionType = "DISTINCT";
return this;
}
/**
* If importWithCypher is provided, it will be added at the beginning of each subquery except first
* @internal
*/
getCypher(env) {
const subqueriesStr = this.subqueries.map((s) => this.getSubqueryCypher(s, env));
const unionTypeStr = this.unionType ? ` ${this.unionType}` : "";
return subqueriesStr.join(`\nUNION${unionTypeStr}\n`);
}
getSubqueryCypher(node, env) {
const subqueryStr = node.getCypher(env);
if (node instanceof Union) {
return `{\n${(0, pad_block_1.padBlock)(subqueryStr)}\n}`;
}
return subqueryStr;
}
}
exports.Union = Union;