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generell Aliases
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jusax23 2023-03-02 14:33:41 +01:00
parent 6e38f4ee13
commit 124c129c2b
Signed by: jusax23
GPG key ID: 499E2AA870C1CD41
5 changed files with 70 additions and 10 deletions
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2
readme.md
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@ -13,6 +13,7 @@ Features:
- [x] remove unused Schema
- [x] joins
- [x] table alias
- [x] generell aliases
- [x] unified response
- [ ] change Schema
- [ ] Key-Value Store Shortcut
@ -131,6 +132,7 @@ _Aliases_:
```javascript
const alias1 = TableA.createAlias("alias1");
//alias1 can be used like a Table in select Statements.
const alias2 = alias(avg(TableA.A1), "someAvg");
```
Get requestet Data:

37
src/alias.ts
View file

@ -1,5 +1,8 @@
import { Attribute, DB, Table } from "./db.js"
import { Aggregation, Modifier } from "./dbStructure.js";
import { Handler } from "./defaultHandler.js";
import { QueryBuilder, selectQuery } from "./query.js";
import { selectElements } from "./types.js";
export class AttributeAlias {
name: string;
@ -21,8 +24,8 @@ export class AttributeAlias {
getStringFunc(handler: Handler) {
return this.table.serialize(handler) + "(" + this.serialize(handler) + ")";
}
toString(){
return this.table.dbLangTableName + "_" + this.name;
toString() {
return this.table.dbLangTableName + "_" + this.name;
}
}
@ -54,4 +57,34 @@ export class TableAlias {
toString(handler: Handler = this.dbLangDatabaseInstance.getHandler()) {
return handler.builders.escapeID(this.dbLangTableName);
}
}
export class Alias {
alias: string;
a: selectElements;
constructor(a: selectElements, alias: string) {
this.alias = alias;
this.a = a;
}
serialize(handler: Handler) {
let builder = new QueryBuilder();
if (this.a instanceof Attribute || this.a instanceof AttributeAlias)
builder.addCode(this.a.getString(handler) + " " + handler.builders.escapeID(this.a.toString()));
else if (this.a instanceof Modifier || this.a instanceof selectQuery || this.a instanceof Aggregation || this.a instanceof Alias) {
builder.addCode("(");
builder.append(this.a.serialize(handler));
builder.addCode(")");
} else {
builder.addInjection(this.a);
}
return builder;
}
getString(handler: Handler) {
return this.serialize(handler);
}
toString() {
return this.alias;
}
}

31
src/defaultHandler.ts
View file

@ -1,4 +1,4 @@
import { AttributeAlias, TableAlias } from "./alias.js";
import { Alias, AttributeAlias, TableAlias } from "./alias.js";
import { Attribute, DB, insertResponse, readResponse, Table, writeResponse } from "./db.js"
import { Aggregation, checkConstraint, joinCross, Datatype, foreignConstraint, Modifier, joinNatural, onJoin, uniqueConstraint, usingJoin } from "./dbStructure.js"
import { insertQuery, Query, QueryBuilder, removeQuery, selectQuery, updateQuery } from "./query.js"
@ -244,9 +244,12 @@ export class Handler {
let a = q.attr;
for (let i = 0; i < a.length; i++) {
const d = a[i];
if (d instanceof Attribute || d instanceof AttributeAlias)
builder.addCode(d.getString(handler)+" "+ handler.builders.escapeID(d.toString()));
else if (d instanceof Modifier || d instanceof selectQuery || d instanceof Aggregation) {
if (d instanceof Attribute || d instanceof AttributeAlias)
builder.addCode(d.getString(handler) + " " + handler.builders.escapeID(d.toString()));
else if (d instanceof Alias) {
builder.append(d.serialize(handler));
builder.addCode(handler.builders.escapeID(d.toString()));
} else if (d instanceof Modifier || d instanceof selectQuery || d instanceof Aggregation) {
builder.addCode("(");
builder.append(d.serialize(handler));
builder.addCode(")");
@ -326,6 +329,8 @@ export class Handler {
qb.addCode(s[0].serialize(handler));
qb.addCode(" = (");
if (s[1] instanceof Attribute || s[1] instanceof AttributeAlias) qb.addCode(s[1].serialize(handler));
else if (s[1] instanceof Alias)
qb.addCode(handler.builders.escapeID(s[1].toString()));
else if (s[1] instanceof Modifier || s[1] instanceof selectQuery || s[1] instanceof Aggregation) {
qb.append(s[1].serialize(handler));
} else {
@ -704,6 +709,8 @@ export class Handler {
not: (handler: Handler, a: allModifierInput[]): QueryBuilder => {
let e = a[0];
if (e instanceof Attribute || e instanceof AttributeAlias) return new QueryBuilder([{ data: "not (" + e.getString(handler) + ")" }])
if (e instanceof Alias)
return new QueryBuilder([{ data: handler.builders.escapeID(e.toString()) }]);
if (e instanceof Modifier || e instanceof selectQuery || e instanceof Aggregation) {
const builder = new QueryBuilder();
builder.addCode("not (");
@ -720,6 +727,8 @@ export class Handler {
like: (handler: Handler, a: allModifierInput[]): QueryBuilder => {
const builder = new QueryBuilder();
if (a[0] instanceof Attribute || a[0] instanceof AttributeAlias) builder.addCode(a[0].getString());
else if (a[0] instanceof Alias)
builder.addCode(handler.builders.escapeID(a[0].toString()));
else if (a[0] instanceof Modifier || a[0] instanceof selectQuery || a[0] instanceof Aggregation) {
builder.append(a[0].serialize(handler));
} else {
@ -727,6 +736,8 @@ export class Handler {
}
builder.addCode(" LIKE ");
if (a[1] instanceof Attribute || a[1] instanceof AttributeAlias) builder.addCode(a[1].getString());
else if (a[1] instanceof Alias)
builder.addCode(handler.builders.escapeID(a[1].toString()));
else if (a[1] instanceof Modifier || a[1] instanceof selectQuery || a[1] instanceof Aggregation) {
builder.append(a[1].serialize(handler));
} else {
@ -737,6 +748,8 @@ export class Handler {
regexp: (handler: Handler, a: allModifierInput[]): QueryBuilder => {
const builder = new QueryBuilder();
if (a[0] instanceof Attribute || a[0] instanceof AttributeAlias) builder.addCode(a[0].getString());
else if (a[0] instanceof Alias)
builder.addCode(handler.builders.escapeID(a[0].toString()));
else if (a[0] instanceof Modifier || a[0] instanceof selectQuery || a[0] instanceof Aggregation) {
builder.append(a[0].serialize(handler));
} else {
@ -744,6 +757,8 @@ export class Handler {
}
builder.addCode(" REGEXP ");
if (a[1] instanceof Attribute || a[1] instanceof AttributeAlias) builder.addCode(a[1].getString());
else if (a[1] instanceof Alias)
builder.addCode(handler.builders.escapeID(a[1].toString()));
else if (a[1] instanceof Modifier || a[1] instanceof selectQuery || a[1] instanceof Aggregation) {
builder.append(a[1].serialize(handler));
} else {
@ -751,9 +766,11 @@ export class Handler {
}
return builder;
},
exists: (handler: Handler, a: allModifierInput[]):QueryBuilder =>{
exists: (handler: Handler, a: allModifierInput[]): QueryBuilder => {
let e = a[0];
if (e instanceof Attribute || e instanceof AttributeAlias) return new QueryBuilder([{ data: "exists (" + e.getString(handler) + ")" }])
if (e instanceof Alias)
return new QueryBuilder([{ data: handler.builders.escapeID(e.toString()) }]);
if (e instanceof Modifier || e instanceof selectQuery || e instanceof Aggregation) {
const builder = new QueryBuilder();
builder.addCode("exists (");
@ -773,6 +790,8 @@ export class Handler {
for (let i = 0; i < a.length; i++) {
const e = a[i];
if (e instanceof Attribute || e instanceof AttributeAlias) builder.addCode(e.getString());
else if (e instanceof Alias)
builder.addCode(handler.builders.escapeID(e.toString()));
else if (e instanceof Modifier || e instanceof selectQuery || e instanceof Aggregation) {
builder.append(e.serialize(handler));
} else {
@ -871,6 +890,8 @@ function joinArg(type: string) {
for (let i = 0; i < a.length; i++) {
const d = a[i];
if (d instanceof Attribute || d instanceof AttributeAlias) builder.addCode(d.getString(handler));
else if (d instanceof Alias)
builder.addCode(handler.builders.escapeID(d.toString()));
else if (d instanceof Modifier || d instanceof selectQuery || d instanceof Aggregation) {
builder.addCode("(");
builder.append(d.serialize(handler));

4
src/funcs.ts
View file

@ -1,3 +1,4 @@
import { Alias } from "./alias.js";
import { Attribute, Table } from "./db.js";
import { Aggregation, BooleanModifier, checkConstraint, Datatype, foreignConstraint, joinCross, joinNatural, usingJoin, onJoin, NumberModifier, StringModifier, uniqueConstraint } from "./dbStructure.js";
import { insertQuery, removeQuery, selectQuery, updateQuery } from "./query.js";
@ -56,6 +57,9 @@ export const insert = (...attrs: Attribute[]) => new insertQuery(attrs);
export const update = (table: Table) => new updateQuery(table);
export const remove = (table: Table) => new removeQuery(table);
//alias
export const alias = (a: selectElements, name: string) => new Alias(a, name);
//datatypes
export const CHAR = (size: number) => new Datatype("char", [size]);

6
src/types.ts
View file

@ -1,12 +1,12 @@
import { AttributeAlias, TableAlias } from "./alias.js";
import { Alias, AttributeAlias, TableAlias } from "./alias.js";
import { Attribute, Table } from "./db.js";
import { Aggregation, BooleanModifier, Datatype, Joins, Modifier } from "./dbStructure.js";
import { QueryBuilder, selectQuery } from "./query.js";
export type primaryData = string | number | boolean | null;
export type allModifierInput = primaryData | Modifier | selectQuery | Attribute | AttributeAlias | Aggregation;
export type allModifierInput = primaryData | Modifier | selectQuery | Attribute | AttributeAlias | Aggregation | Alias;
export type selectElements = primaryData | Attribute | AttributeAlias | Aggregation | selectQuery
export type selectElements = primaryData | Attribute | AttributeAlias | Aggregation | selectQuery | Alias;
export type selectFromElements = TableAlias | Table | Joins | null;
export type joinElements = Table | Joins;