import { ConnectionOptions } from "../ConnectionOptions";
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/**
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* Reads connection options from environment variables.
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* Environment variables can have only a single connection.
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* Its strongly required to define TYPEORM_CONNECTION env variable.
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*/
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export declare class ConnectionOptionsEnvReader {
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/**
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* Reads connection options from environment variables.
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*/
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read(): ConnectionOptions;
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/**
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* Transforms logging string into real logging value connection requires.
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*/
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protected transformLogging(logging: string): any;
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/**
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* Transforms caching option into real caching value option requires.
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*/
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protected transformCaching(): boolean | object | undefined;
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/**
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* Converts a string which contains multiple elements split by comma into a string array of strings.
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*/
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protected stringToArray(variable?: string): string[];
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}
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