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Original file line number | Diff line number | Diff line change |
---|---|---|
@@ -0,0 +1,45 @@ | ||
import { | ||
_ISchema, | ||
_Transaction, | ||
_IStatementExecutor, | ||
_IStatement, | ||
} from '../../interfaces-private'; | ||
import { AlterEnumType } from 'https://deno.land/x/pgsql_ast_parser@12.0.1/mod.ts'; | ||
import { ExecHelper } from '../exec-utils.ts'; | ||
import { ignore } from '../../utils.ts'; | ||
import { asEnum, CustomEnumType } from '../../datatypes/t-custom-enum.ts'; | ||
|
||
export class AlterEnum extends ExecHelper implements _IStatementExecutor { | ||
private onSchema: _ISchema; | ||
private originalEnum: CustomEnumType; | ||
constructor({ schema }: _IStatement, private p: AlterEnumType) { | ||
super(p); | ||
this.onSchema = schema.getThisOrSiblingFor(p.name); | ||
this.originalEnum = asEnum(schema.getObject(p.name)) | ||
if (!this.onSchema) { | ||
ignore(this.p) | ||
} | ||
} | ||
|
||
execute(t: _Transaction) { | ||
// commit pending data before making changes | ||
// (because the index sequence creation does support further rollbacks) | ||
t = t.fullCommit(); | ||
const enumValues = this.originalEnum.values | ||
|
||
switch (this.p.change.type) { | ||
case 'add value': | ||
enumValues.push(this.p.change.add.value) | ||
break; | ||
case 'rename': | ||
this.originalEnum.drop(t) | ||
this.onSchema.registerEnum(this.p.change.to.name, enumValues) | ||
break; | ||
} | ||
|
||
// new implicit transaction | ||
t = t.fork(); | ||
|
||
return this.noData(t, 'ALTER'); | ||
} | ||
} |
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