diff --git a/src/30statements.js b/src/30statements.js
index 102c87f502..b84b904803 100755
--- a/src/30statements.js
+++ b/src/30statements.js
@@ -24,6 +24,6 @@ yy.Statements = class Statements {
 					const res = statements.map(st => st(params));
 					if (cb) cb(res);
 					return res;
-			  };
+				};
 	}
 };
diff --git a/src/50expression.js b/src/50expression.js
index 8f086ab5b8..bd76fdc93d 100755
--- a/src/50expression.js
+++ b/src/50expression.js
@@ -1,11 +1,3 @@
-/*
-//
-// Expressions for Alasql.js
-// Date: 03.11.2014
-// (c) 2014, Andrey Gershun
-//
-*/
-
 {
 	const assign = Object.assign;
 
@@ -197,65 +189,45 @@
 		}
 	}
 
+	const toTypeNumberOps = new Set(['-', '*', '/', '%', '^']);
+	const toTypeStringOps = new Set(['||']);
+	const toTypeBoolOps = new Set([
+		'AND', 'OR', 'NOT', '=', '==', '===', '!=', '!==', '!===',
+		'>', '>=', '<', '<=', 'IN', 'NOT IN', 'LIKE', 'NOT LIKE',
+		'REGEXP', 'GLOB', 'BETWEEN', 'NOT BETWEEN', 'IS NULL', 'IS NOT NULL'
+	]);
 	class Op {
 		constructor(params) {
 			assign(this, params);
 		}
 
 		toString() {
+			const leftStr = this.left.toString();
+			let s;
+
 			if (this.op === 'IN' || this.op === 'NOT IN') {
-				return this.left.toString() + ' ' + this.op + ' (' + this.right.toString() + ')';
+				return `${leftStr} ${this.op} (${this.right.toString()})`;
 			}
+
 			if (this.allsome) {
-				return (
-					this.left.toString() +
-					' ' +
-					this.op +
-					' ' +
-					this.allsome +
-					' (' +
-					this.right.toString() +
-					')'
-				);
+				return `${leftStr} ${this.op} ${this.allsome} (${this.right.toString()})`;
 			}
-			if (this.op === '->' || this.op === '!') {
-				var s = this.left.toString() + this.op;
-				//		console.log(this.right);
-				if (typeof this.right !== 'string' && typeof this.right !== 'number') {
-					s += '(';
-				}
-
-				s += this.right.toString();
 
-				if (typeof this.right !== 'string' && typeof this.right !== 'number') {
-					s += ')';
-				}
-
-				return s;
+			if (this.op === '->' || this.op === '!') {
+				s = `${leftStr}${this.op}`;
+				if (typeof this.right !== 'string' && typeof this.right !== 'number')
+					return s + `(${this.right.toString()})`;
+				return s + this.right.toString();
 			}
+
 			if (this.op === 'BETWEEN' || this.op === 'NOT BETWEEN') {
-				var s =
-					this.left.toString() +
-					' ' +
-					this.op +
-					' ' +
-					this.right1.toString() +
-					' AND ' +
-					this.right2.toString();
-
-				return s;
+				return `${leftStr} ${this.op} ${this.right1.toString()} AND ${this.right2.toString()}`;
 			}
 
-			return (
-				this.left.toString() +
-				' ' +
-				this.op +
-				' ' +
-				(this.allsome ? this.allsome + ' ' : '') +
-				this.right.toString()
-			);
+			return `${leftStr} ${this.op} ${this.allsome ? this.allsome + ' ' : ''}${this.right.toString()}`;
 		}
 
+
 		findAggregator(query) {
 			if (this.left && this.left.findAggregator) {
 				this.left.findAggregator(query);
@@ -267,69 +239,38 @@
 		}
 
 		toType(tableid) {
-			if (['-', '*', '/', '%', '^'].indexOf(this.op) > -1) {
+			if (toTypeNumberOps.has(this.op))
 				return 'number';
-			}
 
-			if (['||'].indexOf(this.op) > -1) {
+
+			if (toTypeStringOps.has(this.op))
 				return 'string';
-			}
+
 
 			if (this.op === '+') {
-				if (this.left.toType(tableid) === 'string' || this.right.toType(tableid) === 'string') {
+				const leftType = this.left.toType(tableid);
+				const rightType = this.right.toType(tableid);
+
+				if (leftType === 'string' || rightType === 'string') {
 					return 'string';
 				}
-				if (this.left.toType(tableid) === 'number' || this.right.toType(tableid) === 'number') {
+				if (leftType === 'number' || rightType === 'number') {
 					return 'number';
 				}
 			}
 
-			if (
-				[
-					'AND',
-					'OR',
-					'NOT',
-					'=',
-					'==',
-					'===',
-					'!=',
-					'!==',
-					'!===',
-					'>',
-					'>=',
-					'<',
-					'<=',
-					'IN',
-					'NOT IN',
-					'LIKE',
-					'NOT LIKE',
-					'REGEXP',
-					'GLOB',
-				].indexOf(this.op) > -1
-			) {
+			if (toTypeBoolOps.has(this.op) || this.allsome)
 				return 'boolean';
-			}
 
-			if (
-				this.op === 'BETWEEN' ||
-				this.op === 'NOT BETWEEN' ||
-				this.op === 'IS NULL' ||
-				this.op === 'IS NOT NULL'
-			) {
-				return 'boolean';
-			}
 
-			if (this.allsome) {
-				return 'boolean';
-			}
+			if (!this.op)
+				return this.left.toType(tableid);
 
-			if (!this.op) {
-				return this.left.toType();
-			}
 
 			return 'unknown';
 		}
 
+
 		toJS(context, tableid, defcols) {
 			//	console.log(this);
 			var s;
@@ -615,13 +556,7 @@
 				op = '&&';
 			}
 
-			// if(this.op === '^') {
-			// 	// return 	'Math.pow('
-			// 	// 		+ leftJS()
-			// 	// 		+ ','
-			// 	// 		+ rightJS()
-			// 	// 		+ ')';
-			// }
+
 			var expr = s || '(' + leftJS() + op + rightJS() + ')';
 
 			var declareRefs = 'y=[(' + refs.join('), (') + ')]';
@@ -785,6 +720,13 @@
 		}
 	}
 
+	const toJsOpMapping = {
+		'~': '~',
+		'-': '-',
+		'+': '+',
+		'NOT': '!',
+	};
+
 	class UniOp {
 		constructor(params) {
 			assign(this, params);
@@ -814,77 +756,39 @@
 		}
 
 		toType() {
-			if (this.op === '-') {
-				return 'number';
-			}
-
-			if (this.op === '+') {
-				return 'number';
-			}
-
-			if (this.op === 'NOT') {
-				return 'boolean';
+			switch (this.op) {
+				case '-':
+				case '+':
+					return 'number';
+				case 'NOT':
+					return 'boolean';
+				default:
+					return 'string';
 			}
-
-			// Todo: implement default case
 		}
 
-		toJS(context, tableid, defcols) {
-			if (this.op === '~') {
-				return '(~(' + this.right.toJS(context, tableid, defcols) + '))';
-			}
 
-			if (this.op === '-') {
-				return '(-(' + this.right.toJS(context, tableid, defcols) + '))';
-			}
 
-			if (this.op === '+') {
-				return '(' + this.right.toJS(context, tableid, defcols) + ')';
+		toJS(context, tableid, defcols) {
+			if (this.right instanceof Column && this.op === '#') {
+				return `(alasql.databases[alasql.useid].objects['${this.right.columnid}'])`;
 			}
 
-			if (this.op === 'NOT') {
-				return '!(' + this.right.toJS(context, tableid, defcols) + ')';
-			}
+			const rightJS = this.right.toJS(context, tableid, defcols);
 
-			if (this.op === '#') {
-				if (this.right instanceof Column) {
-					return "(alasql.databases[alasql.useid].objects['" + this.right.columnid + "'])";
-				} else {
-					return (
-						'(alasql.databases[alasql.useid].objects[' +
-						this.right.toJS(context, tableid, defcols) +
-						'])'
-					);
-				}
+			if (toJsOpMapping.hasOwnProperty(this.op)) {
+				return `(${toJsOpMapping[this.op]}(${rightJS}))`;
 			}
 
-			// Please avoid === here
 			if (this.op == null) {
-				// jshint ignore:line
-				return '(' + this.right.toJS(context, tableid, defcols) + ')';
+				return `(${rightJS})`;
 			}
 
-			// Todo: implement default case.
+			throw new Error(`Unsupported operator: ${this.op}`);
 		}
+
 	}
 
-	/*/*
-// yy.Star = class {
-// 	constructor (params) { return assign(this, params); }
-// 	toString () {
-// 		var s = this.fieldid;
-// 		if (this.tableid) {
-// 			s = this.tableid + '.' + s;
-// 			if (this.databaseid) {
-// 				s = this.databaseid + '.' + s;
-// 			}
-// 		}
-// 		if (this.alias)
-// 			s += ' AS ' + this.alias;
-// 		return s;
-// 	}
-// }
-*/
 
 	class Column {
 		constructor(params) {
@@ -892,82 +796,55 @@
 		}
 
 		toString() {
-			var s;
+			let s = this.columnid;
+
 			if (this.columnid == +this.columnid) {
 				s = '[' + this.columnid + ']';
-			} else {
-				s = this.columnid;
 			}
+
 			if (this.tableid) {
-				if (+this.columnid === this.columnid) {
-					s = this.tableid + s;
-				} else {
-					s = this.tableid + '.' + s;
-				}
+				s = this.tableid + (this.columnid === +this.columnid ? '' : '.') + s;
+
 				if (this.databaseid) {
 					s = this.databaseid + '.' + s;
 				}
 			}
+
 			return s;
 		}
 
+
 		toJS(context, tableid, defcols) {
-			var s = '';
 			if (!this.tableid && tableid === '' && !defcols) {
-				if (this.columnid !== '_') {
-					s = context + "['" + this.columnid + "']";
-				} else {
-					if (context === 'g') {
-						s = "g['_']";
-					} else {
-						s = context;
-					}
-				}
-			} else {
-				if (context === 'g') {
-					s = "g['" + this.nick + "']";
-				} else if (this.tableid) {
-					if (this.columnid !== '_') {
-						s = context + "['" + this.tableid + "']['" + this.columnid + "']";
-					} else {
-						if (context === 'g') {
-							s = "g['_']";
-						} else {
-							s = context + "['" + this.tableid + "']";
-						}
-					}
-				} else if (defcols) {
-					var tbid = defcols[this.columnid];
-					if (tbid === '-') {
-						throw new Error(
-							'Cannot resolve column "' + this.columnid + '" because it exists in two source tables'
-						);
-					} else if (tbid) {
-						if (this.columnid !== '_') {
-							s = context + "['" + tbid + "']['" + this.columnid + "']";
-						} else {
-							s = context + "['" + tbid + "']";
-						}
-						//			console.log(836,tbid,s);
-					} else {
-						if (this.columnid !== '_') {
-							s = context + "['" + (this.tableid || tableid) + "']['" + this.columnid + "']";
-						} else {
-							s = context + "['" + (this.tableid || tableid) + "']";
-						}
-					}
-				} else if (tableid === -1) {
-					s = context + "['" + this.columnid + "']";
+				return this.columnid !== '_' ? `${context}['${this.columnid}']` : (context === 'g' ? "g['_']" : context);
+			}
+
+			if (context === 'g') {
+				return `g['${this.nick}']`;
+			}
+
+			if (this.tableid) {
+				return this.columnid !== '_' ? `${context}['${this.tableid}']['${this.columnid}']` : (context === 'g' ? "g['_']" : `${context}['${this.tableid}']`);
+			}
+
+			if (defcols) {
+				const tbid = defcols[this.columnid];
+				if (tbid === '-') {
+					throw new Error(`Cannot resolve column "${this.columnid}" because it exists in two source tables`);
+				} else if (tbid) {
+					return this.columnid !== '_' ? `${context}['${tbid}']['${this.columnid}']` : `${context}['${tbid}']`;
 				} else {
-					if (this.columnid !== '_') {
-						s = context + "['" + (this.tableid || tableid) + "']['" + this.columnid + "']";
-					} else {
-						s = context + "['" + (this.tableid || tableid) + "']";
-					}
+					return this.columnid !== '_' ? `${context}['${this.tableid || tableid}']['${this.columnid}']` : `${context}['${this.tableid || tableid}']`;
 				}
 			}
-			return s;
+
+			if (tableid === -1) {
+				return `${context}['${this.columnid}']`;
+			}
+
+			return this.columnid !== '_' ? `${context}['${this.tableid || tableid}']['${this.columnid}']` : `${context}['${this.tableid || tableid}']`;
 		}
+
 	}
 
 	class AggrValue {
@@ -976,68 +853,39 @@
 		}
 
 		toString() {
-			var s = '';
-			if (this.aggregatorid === 'REDUCE') {
-				s += this.funcid.replace(re_invalidFnNameChars, '') + '(';
-			} else {
-				s += this.aggregatorid + '(';
-			}
+			const funcName = this.aggregatorid === 'REDUCE' ? this.funcid.replace(re_invalidFnNameChars, '') : this.aggregatorid;
+			const distinctPart = this.distinct ? 'DISTINCT ' : '';
+			const expressionPart = this.expression ? this.expression.toString() : '';
+			const overPart = this.over ? ` ${this.over.toString()}` : '';
 
-			if (this.distinct) {
-				s += 'DISTINCT ';
-			}
+			return `${funcName}(${distinctPart}${expressionPart})${overPart}`;
+		}
 
-			if (this.expression) {
-				s += this.expression.toString();
-			}
 
-			s += ')';
+		findAggregator(query) {
+			const colas = escapeq(this.toString()) + ':' + query.selectGroup.length;
 
-			if (this.over) {
-				s += ' ' + this.over.toString();
-			}
-			return s;
-		}
+			if (!this.nick) {
+				this.nick = colas;
 
-		findAggregator(query) {
-			var colas = escapeq(this.toString()) + ':' + query.selectGroup.length;
-			var found = false;
-			if (!found) {
-				if (!this.nick) {
-					this.nick = colas;
-					var found = false;
-					for (var i = 0; i < query.removeKeys.length; i++) {
-						if (query.removeKeys[i] === colas) {
-							found = true;
-							break;
-						}
-					}
-					if (!found) {
-						query.removeKeys.push(colas);
-					}
+				if (!query.removeKeys.includes(colas)) {
+					query.removeKeys.push(colas);
 				}
-				query.selectGroup.push(this);
 			}
-			return;
+
+			query.selectGroup.push(this);
 		}
 
+
 		toType() {
-			if (
-				['SUM', 'COUNT', 'AVG', 'MIN', 'MAX', 'AGGR', 'VAR', 'STDDEV', 'TOTAL'].indexOf(
-					this.aggregatorid
-				) > -1
-			) {
+			if (['SUM', 'COUNT', 'AVG', 'MIN', 'MAX', 'AGGR', 'VAR', 'STDDEV', 'TOTAL'].includes(this.aggregatorid)) {
 				return 'number';
 			}
 
-			if (['ARRAY'].indexOf(this.aggregatorid) > -1) {
+			if (this.aggregatorid === 'ARRAY') {
 				return 'array';
 			}
 
-			if (['FIRST', 'LAST'].indexOf(this.aggregatorid) > -1) {
-				return this.expression.toType();
-			}
-
 			return this.expression.toType();
 		}
 
diff --git a/src/59convert.js b/src/59convert.js
index ba89b1645d..e0551566dc 100755
--- a/src/59convert.js
+++ b/src/59convert.js
@@ -188,49 +188,58 @@ alasql.stdfn.CONVERT = function (value, args) {
 		}
 	}
 
-	if (args.dbtypeid == 'Date') {
-		return t;
-	} else if (udbtypeid == 'DATE') {
-		return s.formattedYear + '.' + s.formattedMonth + '.' + s.formattedDate;
-	} else if (udbtypeid == 'DATETIME' || udbtypeid == 'DATETIME2') {
-		var f = s.fullYear + '.' + s.formattedMonth + '.' + s.formattedDate;
-		f += ' ' + s.formattedHour + ':' + s.formattedMinutes + ':' + s.formattedSeconds;
-		f += '.' + s.formattedMilliseconds;
-		return f;
-	} else if (['MONEY'].indexOf(udbtypeid) > -1) {
-		var m = +val;
-		return (m | 0) + ((m * 100) % 100) / 100;
-	} else if (['BOOLEAN'].indexOf(udbtypeid) > -1) {
-		return !!val;
-	} else if (
-		['INT', 'INTEGER', 'SMALLINT', 'BIGINT', 'SERIAL', 'SMALLSERIAL', 'BIGSERIAL'].indexOf(
-			args.dbtypeid.toUpperCase()
-		) > -1
-	) {
-		return val | 0;
-	} else if (
-		['STRING', 'VARCHAR', 'NVARCHAR', 'CHARACTER VARIABLE'].indexOf(args.dbtypeid.toUpperCase()) >
-		-1
-	) {
-		if (args.dbsize) return ('' + val).substr(0, args.dbsize);
-		else return '' + val;
-	} else if (['CHAR', 'CHARACTER', 'NCHAR'].indexOf(udbtypeid) > -1) {
-		return (val + new Array(args.dbsize + 1).join(' ')).substr(0, args.dbsize);
-		//else return ""+val.substr(0,1);
-	} else if (['NUMBER', 'FLOAT', 'DECIMAL', 'NUMERIC'].indexOf(udbtypeid) > -1) {
-		var m = +val;
-		//toPrecision sets the number of numbers total in the result
-		m = args.dbsize !== undefined ? parseFloat(m.toPrecision(args.dbsize)) : m;
-		//toFixed sets the number of numbers to the right of the decimal
-		m = args.dbprecision !== undefined ? parseFloat(m.toFixed(args.dbprecision)) : m;
-		return m;
-	} else if (['JSON'].indexOf(udbtypeid) > -1) {
-		if (typeof val == 'object') return val;
-		try {
-			return JSON.parse(val);
-		} catch (err) {
-			throw new Error('Cannot convert string to JSON');
-		}
+	switch (udbtypeid) {
+		case 'DATE':
+			return `${s.formattedYear}.${s.formattedMonth}.${s.formattedDate}`;
+		case 'DATETIME':
+		case 'DATETIME2':
+			return `${s.fullYear}.${s.formattedMonth}.${s.formattedDate} ${s.formattedHour}:${s.formattedMinutes}:${s.formattedSeconds}.${s.formattedMilliseconds}`;
+		case 'MONEY':
+			var m = +val;
+			return (m | 0) + ((m * 100) % 100) / 100;
+		case 'BOOLEAN':
+			return !!val;
+		case 'INT':
+		case 'INTEGER':
+		case 'SMALLINT':
+		case 'BIGINT':
+		case 'SERIAL':
+		case 'SMALLSERIAL':
+		case 'BIGSERIAL':
+			return val | 0;
+		case 'STRING':
+		case 'VARCHAR':
+		case 'NVARCHAR':
+		case 'CHARACTER VARIABLE':
+			return args.dbsize ? String(val).substr(0, args.dbsize) : String(val);
+		case 'CHAR':
+		case 'CHARACTER':
+		case 'NCHAR':
+			return (val + ' '.repeat(args.dbsize)).substr(0, args.dbsize);
+		case 'NUMBER':
+		case 'FLOAT':
+		case 'DECIMAL':
+		case 'NUMERIC':
+			var m = +val;
+			if (args.dbsize !== undefined) {
+				m = parseFloat(m.toPrecision(args.dbsize));
+			}
+			if (args.dbprecision !== undefined) {
+				m = parseFloat(m.toFixed(args.dbprecision));
+			}
+			return m;
+		case 'JSON':
+			if (typeof val === 'object') {
+				return val;
+			}
+			try {
+				return JSON.parse(val);
+			} catch (err) {
+				throw new Error('Cannot convert string to JSON');
+			}
+		case 'Date':
+			return val;
+		default:
+			return val;
 	}
-	return val;
 };
diff --git a/test/lib/assert/assert.js b/test/lib/assert/assert.js
index 8af563547f..369c80de15 100644
--- a/test/lib/assert/assert.js
+++ b/test/lib/assert/assert.js
@@ -118,7 +118,7 @@
 					var keys = [];
 					for (var key in obj) keys.push(key);
 					return keys;
-			  };
+				};
 	// 1. The assert module provides functions that throw
 	// AssertionError's when particular conditions are not met. The
 	// assert module must conform to the following interface.
diff --git a/test/test293.js b/test/test293.js
index 3cce5621fb..146db571bf 100644
--- a/test/test293.js
+++ b/test/test293.js
@@ -173,10 +173,10 @@ if (typeof exports === 'object') {
 		'function' == typeof define && define.amd
 			? define(function () {
 					return A;
-			  })
+				})
 			: 'object' == typeof module && module.exports
-			? (module.exports = A)
-			: (n.md5 = A);
+				? (module.exports = A)
+				: (n.md5 = A);
 	})(this);
 }
 
diff --git a/types/alasql.d.ts b/types/alasql.d.ts
index 6a38e20573..c93392d9c7 100644
--- a/types/alasql.d.ts
+++ b/types/alasql.d.ts
@@ -83,60 +83,60 @@ declare module 'alasql' {
 	}
 
 	/**
-	* AlaSQL database object. This is a lightweight implimentation
-	*
-	* @interface database
-	*/
+	 * AlaSQL database object. This is a lightweight implimentation
+	 *
+	 * @interface database
+	 */
 	interface database {
 		/**
-		* The database ID.
-		*
-		* @type {string}
-		* @memberof database
-		*/
+		 * The database ID.
+		 *
+		 * @type {string}
+		 * @memberof database
+		 */
 		databaseid: string;
-		
+
 		/**
-		* The collection of tables in the database.
-		*
-		* @type {tableLookUp}
-		* @memberof database
-		*/		
-		tables:  tableLookUp;
-	}
-	
+		 * The collection of tables in the database.
+		 *
+		 * @type {tableLookUp}
+		 * @memberof database
+		 */
+		tables: tableLookUp;
+	}
+
 	/**
-	* AlaSQL table object. This is a lightweight implimentation
-	*
-	* @interface table
-	*/
+	 * AlaSQL table object. This is a lightweight implimentation
+	 *
+	 * @interface table
+	 */
 	interface table {
 		/**
-		* The array of data stored in the table which can be queried
-		*
-		* @type {any[]}
-		* @memberof table
-		*/
+		 * The array of data stored in the table which can be queried
+		 *
+		 * @type {any[]}
+		 * @memberof table
+		 */
 		data: any[];
 	}
 
 	/**
-	* AlaSQL database dictionary
-	*
-	* @interface databaseLookUp
-	*/	
+	 * AlaSQL database dictionary
+	 *
+	 * @interface databaseLookUp
+	 */
 	interface databaseLookUp {
 		[databaseName: string]: database;
 	}
 
 	/**
-	* AlaSQL table dictionary
-	*
-	* @interface tableLookUp
-	*/
-	interface tableLookUp {	
+	 * AlaSQL table dictionary
+	 *
+	 * @interface tableLookUp
+	 */
+	interface tableLookUp {
 		[tableName: string]: table;
-	}	
+	}
 
 	interface AlaSQL {
 		options: AlaSQLOptions;
@@ -152,41 +152,41 @@ declare module 'alasql' {
 		setXLSX(xlsxlib: typeof xlsx): void;
 
 		/**
-		* Array of databases in the AlaSQL object.
-		*
-		* @type {databaseLookUp}
-		* @memberof AlaSQL
-		*/		
+		 * Array of databases in the AlaSQL object.
+		 *
+		 * @type {databaseLookUp}
+		 * @memberof AlaSQL
+		 */
 		databases: databaseLookUp;
 
 		/**
-		* Equivalent to alasql('USE '+databaseid). This will change the current
-		* database to the one specified. This will update the useid property and
-		* the tables property.
-		*
-		* @param {string} databaseid
-		* @memberof AlaSQL
-		*/
-		use (databaseid: string): void; 
-		
+		 * Equivalent to alasql('USE '+databaseid). This will change the current
+		 * database to the one specified. This will update the useid property and
+		 * the tables property.
+		 *
+		 * @param {string} databaseid
+		 * @memberof AlaSQL
+		 */
+		use(databaseid: string): void;
+
 		/**
-		* The current database ID. If no database is selected, this is the
-		* default database ID (called alasql).
-		*
-		* @type {string}
-		* @memberof AlaSQL
-		*/		
+		 * The current database ID. If no database is selected, this is the
+		 * default database ID (called alasql).
+		 *
+		 * @type {string}
+		 * @memberof AlaSQL
+		 */
 		useid: string;
-		
+
 		/**
-		* Array of the tables in the default database (called alasql). If
-		* the database is changes via a USE statement or the use method, this
-		* becomes the tables in the new database.
-		*
-		* @type {tableLookUp}
-		* @memberof AlaSQL
-		*/		
-		tables: tableLookUp; 
+		 * Array of the tables in the default database (called alasql). If
+		 * the database is changes via a USE statement or the use method, this
+		 * becomes the tables in the new database.
+		 *
+		 * @type {tableLookUp}
+		 * @memberof AlaSQL
+		 */
+		tables: tableLookUp;
 	}
 
 	const alasql: AlaSQL;