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postgresql.js
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postgresql.js
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exports.init = function (dbname) {
return [
'CREATE TABLE sources (id SERIAL NOT NULL PRIMARY KEY, name TEXT);',
'CREATE TABLE datapoints (id SERIAL NOT NULL PRIMARY KEY, name TEXT, type INTEGER);',
'CREATE TABLE ts_number (id INTEGER NOT NULL, ts BIGINT, val REAL, ack BOOLEAN, _from INTEGER, q INTEGER, PRIMARY KEY(id, ts));',
'CREATE TABLE ts_string (id INTEGER NOT NULL, ts BIGINT, val TEXT, ack BOOLEAN, _from INTEGER, q INTEGER, PRIMARY KEY(id, ts));',
'CREATE TABLE ts_bool (id INTEGER NOT NULL, ts BIGINT, val BOOLEAN, ack BOOLEAN, _from INTEGER, q INTEGER, PRIMARY KEY(id, ts));',
'CREATE TABLE ts_counter (id INTEGER NOT NULL, ts BIGINT, val REAL);'
];
};
exports.destroy = function (dbname) {
return [
'DROP TABLE ts_counter;',
'DROP TABLE ts_number;',
'DROP TABLE ts_string;',
'DROP TABLE ts_bool;',
'DROP TABLE sources;',
'DROP TABLE datapoints;'
];
};
exports.getFirstTs = function (dbname, db) {
return `SELECT id, MIN(ts) AS ts FROM ${db} GROUP BY id;`;
};
exports.insert = function (dbname, index, values) {
const insertValues = {}
values.forEach(value => {
// state, from, db
insertValues[value.db] = insertValues[value.db] || [];
if (!value.state || value.state.val === null || value.state.val === undefined) {
value.state.val = 'NULL';
} else if (value.db === 'ts_string') {
value.state.val = `'${value.state.val.toString().replace(/'/g, '')}'`;
} else if (value.db === 'ts_number') {
if (isNaN(value.state.val)) {
value.state.val = 'NULL';
}
}
if (value.db === 'ts_counter') {
insertValues[value.db].push(`(${index}, ${value.state.ts}, ${value.state.val})`);
} else {
insertValues[value.db].push(`(${index}, ${value.state.ts}, ${value.state.val}, ${!!value.state.ack}, ${value.from || 0}, ${value.state.q || 0})`);
}
});
let query = '';
for (let db in insertValues) {
if (db === 'ts_counter') {
while (insertValues[db].length) {
query += `INSERT INTO ts_counter (id, ts, val) VALUES ${insertValues[db].splice(0, 500).join(',')};`;
}
} else {
while (insertValues[db].length) {
query += `INSERT INTO ${db} (id, ts, val, ack, _from, q) VALUES ${insertValues[db].splice(0, 500).join(',')};`;
}
}
}
return query;
}
exports.retention = function (dbname, index, db, retention) {
const d = new Date();
d.setSeconds(-retention);
let query = `DELETE FROM ${db} WHERE`;
query += ` id=${index}`;
query += ` AND ts < ${d.getTime()}`;
query += ';';
return query;
};
exports.getIdSelect = function (dbname, name) {
if (!name) {
return "SELECT id, type, name FROM datapoints;";
} else {
return `SELECT id, type, name FROM datapoints WHERE name='${name}';`;
}
};
exports.getIdInsert = function (dbname, name, type) {
return `INSERT INTO datapoints (name, type) VALUES('${name}', ${type});`;
};
exports.getIdUpdate = function (dbname, id, type) {
return `UPDATE datapoints SET type = ${type} WHERE id = ${id};`;
};
exports.getFromSelect = function (dbname, from) {
if (from) {
return `SELECT id FROM sources WHERE name='${from}';`;
}
else {
return "SELECT id, name FROM sources;";
}
};
exports.getFromInsert = function (dbname, from) {
return `INSERT INTO sources (name) VALUES('${from}');`;
};
exports.getCounterDiff = function (dbname, options) {
// Take first real value after start
const subQueryStart = `SELECT ts, val FROM \`${dbname}\`.ts_number WHERE id=${options.id} AND ts>=${options.start} AND ts<${options.end} AND val IS NOT NULL ORDER BY ts ASC LIMIT 1`;
// Take last real value before end
const subQueryEnd = `SELECT ts, val FROM \`${dbname}\`.ts_number WHERE id=${options.id} AND ts>=${options.start} AND ts<${options.end} AND val IS NOT NULL ORDER BY ts DESC LIMIT 1`;
// Take last value before start
const subQueryFirst = `SELECT ts, val FROM \`${dbname}\`.ts_number WHERE id=${options.id} AND ts< ${options.start} ORDER BY ts DESC LIMIT 1`;
// Take next value after end
const subQueryLast = `SELECT ts, val FROM \`${dbname}\`.ts_number WHERE id=${options.id} AND ts>= ${options.end} ORDER BY ts ASC LIMIT 1`;
// get values from counters where counter changed from up to down (e.g. counter changed)
const subQueryCounterChanges = `SELECT ts, val FROM \`${dbname}\`.ts_counter WHERE id=${options.id} AND ts>${options.start} AND ts<${options.end} AND val IS NOT NULL ORDER BY ts ASC`;
return "SELECT DISTINCT(a.ts), a.val from ((" + subQueryFirst + ")\n" +
"UNION ALL \n(" + subQueryStart + ")\n" +
"UNION ALL \n(" + subQueryEnd + ")\n" +
"UNION ALL \n(" + subQueryLast + ")\n" +
"UNION ALL \n(" + subQueryCounterChanges + ")\n" +
"ORDER BY ts) a;";
};
exports.getHistory = function (dbname, db, options) {
let query = "SELECT ts, val" +
(!options.id ? `, ${db}.id as id` : '') +
(options.ack ? ', ack' : '') +
(options.from ? ', sources.name as from' : '') +
(options.q ? ', q' : '') + ' FROM ' + db;
if (options.from) {
query += ` INNER JOIN sources ON sources.id=${db}._from`;
}
let where = '';
if (options.id) {
where += ` ${db}.id=${options.id}`;
}
if (options.end) {
where += `${where ? " AND" : ''} ${db}.ts < ${options.end}`;
}
if (options.start) {
where += `${where ? " AND" : ''} ${db}.ts >= ${options.start}`;
//add last value before start
let subQuery;
let subWhere;
subQuery = " SELECT ts, val" +
(!options.id ? `, ${db}.id as id` : '') +
(options.ack ? ', ack' : '') +
(options.from ? ", sources.name as from" : '') +
(options.q ? ', q' : '') + ' FROM ' + db;
if (options.from) {
subQuery += ` INNER JOIN sources ON sources.id=${db}._from`;
}
subWhere = '';
if (options.id) {
subWhere += ` ${db}.id=${options.id}`;
}
if (options.ignoreNull) {
//subWhere += (subWhere ? " AND" : '') + " val <> NULL";
}
subWhere += `${subWhere ? " AND" : ''} ${db}.ts < ${options.start}`;
if (subWhere) {
subQuery += ` WHERE ${subWhere}`;
}
subQuery += ` ORDER BY ${db}.ts DESC LIMIT 1`;
where += ` UNION ALL (${subQuery})`;
//add next value after end
subQuery = " SELECT ts, val" +
(!options.id ? `, ${db}.id as id` : '') +
(options.ack ? ', ack' : '') +
(options.from ? ", sources.name as from" : '') +
(options.q ? ', q' : '') + ' FROM ' + db;
if (options.from) {
subQuery += ` INNER JOIN sources ON sources.id=${db}._from`;
}
subWhere = '';
if (options.id) {
subWhere += ` ${db}.id=${options.id}`;
}
if (options.ignoreNull) {
//subWhere += (subWhere ? " AND" : '') + " val <> NULL";
}
subWhere += `${subWhere ? ' AND' : ''} ${db}.ts >= ${options.end}`;
if (subWhere) {
subQuery += ` WHERE ${subWhere}`;
}
subQuery += ` ORDER BY ${db}.ts ASC LIMIT 1`;
where += ` UNION ALL(${subQuery})`;
}
if (where) {
query += ` WHERE ${where}`;
}
query += ' ORDER BY ts';
if ((!options.start && options.count) || (options.aggregate === 'none' && options.count && options.returnNewestEntries) ) {
query += ' DESC';
} else {
query += ' ASC';
}
if ((!options.start && options.count) || (options.aggregate === 'none' && options.count)) {
query += ` LIMIT ${options.count + 2}`;
}
query += ';';
return query;
};
exports.delete = function (dbname, db, index, start, end) {
let query = `DELETE FROM ${db} WHERE`;
query += " id=" + index;
if (start && end) {
query += ` AND ts>=${start} AND ts <= ${end}`;
} else if (start) {
query += ` AND ts=${start}`;
}
query += ';';
return query;
};
exports.update = function (dbname, index, state, from, db) {
if (!state || state.val === null || state.val === undefined) {
state.val = 'NULL';
} else if (db === 'ts_string') {
state.val = `'${state.val.toString().replace(/'/g, '')}'`;
}
let query = `UPDATE ${db} SET `;
let vals = [];
if (state.val !== undefined) {
vals.push(`val=${state.val}`);
}
if (state.q !== undefined) {
vals.push(`q=${state.q}`);
}
if (from !== undefined) {
vals.push(`_from=${from}`);
}
if (state.ack !== undefined) {
vals.push(`ack=${!!state.ack}`);
}
query += vals.join(', ');
query += ' WHERE ';
query += ` id=${index}`;
query += ` AND ts=${state.ts}`;
query += ';';
return query;
};