ddl-manager/dist/parser/ColumnReferenceParser.js

store postgres procedures and triggers in files

"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
exports.ColumnReferenceParser = void 0;
const psql_lang_1 = require("psql-lang");
const ast_1 = require("../ast");
const CacheSyntax_1 = require("./CacheSyntax");
const assert_1 = require("assert");
const utils_1 = require("./utils");
class ColumnReferenceParser {
    parse(columnLink) {
        const columnName = columnLink.last().toValue();
        const tableReference = this.findTableReference(columnLink);
        return new ast_1.ColumnReference(tableReference, columnName);
    }
    findTableReference(columnLink) {
        const isStar = (columnLink.row.allColumns &&
            columnLink.row.column.length === 0);
        if (isStar) {
            return this.findFirstFrom(columnLink);
        }
        const fromItem = columnLink.findDeclaration();
        if (fromItem) {
            return utils_1.parseFromTable(fromItem.row.table, fromItem.row.as);
        }
        if (columnLink.row.column.length === 1) {
            return this.findFirstFrom(columnLink);
        }
        const cache = columnLink.findParentInstance(CacheSyntax_1.CacheSyntax);
        assert_1.strict.ok(cache, `source for column ${columnLink} not found`);
        return utils_1.parseFromTable(cache.row.for, cache.row.as);
    }
    findFirstFrom(columnLink) {
        const select = columnLink.findParentInstance(psql_lang_1.Select);
        const fromItem = select.row.from[0];
        return utils_1.parseFromTable(fromItem.row.table, fromItem.row.as);
    }
}
exports.ColumnReferenceParser = ColumnReferenceParser;
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