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

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

'use strict';

const linksSQL = require('./createLinksSQLStatements_1_n');
const sql = require('./sqlStatement');

exports.createPutPostLinksStatementsCreateTmpTables = function (
    context,
    asyncDone
) {
    linksSQL.createLinksStatementsCreateTmpTables(context);
    return asyncDone(null, context);
};

exports.createPutPostLinksStatementsInsert = function (context, asyncDone) {
    linksSQL.createLinksStatementsInsert(context);
    return asyncDone(null, context);
};
/******************** MxN relationships ***********************/

exports.createPutPostLinksMNStatementsCreateTmpTables = function (
    context,
    asyncDone
) {
    try {
        const dbSegLast = context.oData.dbSegmentLast,
            sqlContext = linksSQL.createMNSQLContext(context, dbSegLast);

        context.sql = sqlContext;
        dbSegLast.sql.stmContainer = new sql.PostContainer();

        createMNPutPostLinksStatementContainerCreateTmpTables(sqlContext);
        return asyncDone(null, context);
    } catch (err) {
        return asyncDone(err, context);
    }
};

exports.createPutPostLinksMNStatementsInsert = function (context, asyncDone) {
    try {
        const sqlContext = context.sql;

        createMNPutPostLinksStatementContainerInsert(sqlContext);
        return asyncDone(null, context);
    } catch (err) {
        return asyncDone(err, context);
    }
};

function createMNPutPostLinksStatementContainerCreateTmpTables(sqlContext) {
    linksSQL.createMNStatementContainerCreateTmpTables(sqlContext);
}

function createMNPutPostLinksStatementContainerInsert(sqlContext) {
    const dbSeg = sqlContext.dbSegLast;

    linksSQL.createMNStatementContainerInsert(sqlContext);

    //create insert statement for master table
    dbSeg.sql.stmContainer.insertTmp = masterMNTableInsertTmp(
        sqlContext,
        dbSeg.sql.rId
    );

    //create insert statement for master table
    dbSeg.sql.stmContainer.insertReal = masterMNTableInsert(
        sqlContext,
        dbSeg.sql.rId
    );
}

function masterMNTableInsertTmp(sqlContext, rId) {
    sqlContext.context.logger.debug(
        'createPutPostLinksStatements',
        'masterMNTableInsertTmp'
    );
    const dbSeg = sqlContext.dbSegLast;

    const stm = new sql.Insert();
    stm.setTableName({ table: rId });
    //SELECT
    stm.addNames(dbSeg.getSelectFragmentsForOverProperties(rId));

    return stm;
}

function masterMNTableInsert(sqlContext, rId) {
    const dbSeg = sqlContext.dbSegLast;

    //subselect
    const subSelect = new sql.Select();
    subSelect.addSelects(new sql.SelectFormula(null, '*'));
    subSelect.setFrom({ schema: null, table: rId, alias: null });

    const stm = new sql.Upsert();

    stm.setTable({ table: dbSeg.getOver().object });
    stm.addNames(dbSeg.getSelectFragmentsForOverProperties(rId));

    //Values
    stm.setSubSelect(subSelect);

    return stm;
}