@sap/xsodata/lib/sql/sqlTools.js

Expose data from a HANA database as OData V2 service with help of .xsodata files.

'use strict';

var sql = require('./sqlStatement');

//Code
exports.rIdToTableName = function (reqId, rId) {
    return '#r' + reqId + '_' + rId;
};

exports.rIdToNewTableName = function (name, netId, reqId, rId) {
    //return '#NEW_' + name + '_' + reqId + '_' + rId;
    return exports.rIdToAlteredTableName('#NEW', name, netId,  reqId, rId);
};

exports.rIdToOldTableName = function (name,  netId, reqId, rId) {
    //return '#OLD_' + name + '_' + reqId + '_' + rId;
    return exports.rIdToAlteredTableName('#OLD', name, netId,  reqId, rId);
};

/**
 * alter a given table name into prefix_name_reqId_rId
 * @param {string} prefix - should start with '#' fot temp tables
 * @param {string} name - the given table (or alias) name
 * @param {int} reqId - request id
 * @param {int} rId - counter
 * */
exports.rIdToAlteredTableName = function (prefix, name, netId,  reqId, rId) {
    return prefix + '_' + name + '_' + netId + '_' + reqId + '_' + rId;
};

exports.collectSqls = function (context,sqlContext) {
    context.logger.silly('sqlCollector', 'collectSqls');
    var containerAll = new sql.GetContainerAll();

    addSqlsToContainer(sqlContext.dbSegLast, containerAll);
    return containerAll;


    /**
     * Move the generated SQL statements from the dbSegment into container
     * Stored is the SQL statements and the corresponding dbSegment
     * @param dbSeg {DbSegment} start point for traversing
     * @param container
     */
    function addSqlsToContainer(dbSeg, container) {
        if (dbSeg.sql.stmContainer.createTmp) {
            container.createTmp.push({stm: dbSeg.sql.stmContainer.createTmp, dbSeg: dbSeg});
        }
        if (dbSeg.sql.stmContainer.insertTmp) {
            container.insertTmp.push({stm: dbSeg.sql.stmContainer.insertTmp, dbSeg: dbSeg});
        }
        if (dbSeg.sql.stmContainer.selectTmp) {
            container.selectTmp.push({stm: dbSeg.sql.stmContainer.selectTmp, dbSeg: dbSeg});
        }
        if (dbSeg.sql.stmContainer.select) {
            container.select.push({stm: dbSeg.sql.stmContainer.select, dbSeg: dbSeg});
        }

        //resource path chain
        if (dbSeg.nextDBSegment) {
            addSqlsToContainer(dbSeg.nextDBSegment, container);
        }

        //resource path chain
        var i;
        for (i = 0; i < dbSeg._ExpandedNavigations.length; i++) {
            var name = dbSeg._ExpandedNavigations[i];
            addSqlsToContainer(dbSeg.getRelevantNavigationSegments()[name], container);
        }
    }
};