小编Dha*_*raj的帖子

如何在 PostgreSQL 11.2 的分区表上创建索引？

我的表是：

CREATE TABLE sometablename
(
    column1 character varying(255) COLLATE pg_catalog."default" NOT NULL,
    column2 integer NOT NULL,
    column3 character varying(255) COLLATE pg_catalog."default" NOT NULL,
    "timestamp" timestamp without time zone NOT NULL,
    avg_val double precision,
    max_val double precision,
    min_val double precision,
    p95_val double precision,
    sample_count double precision,
    sum_val double precision,
    unit character varying(255) COLLATE pg_catalog."default",
    user_id bigint NOT NULL,
    CONSTRAINT testtable_pkey PRIMARY KEY (column1, column2, column3, "timestamp", user_id)
)
PARTITION BY HASH (user_id) 
    WITH (
    OIDS = FALSE …

在 Eclipse 中打开报表设计视角时出现此异常。

org.eclipse.core.runtime.CoreException: Plug-in org.eclipse.birt.report.designer.ui.ide was unable to load class org.eclipse.birt.report.designer.ui.editors.ReportEditorProxy.
    at org.eclipse.core.internal.registry.osgi.RegistryStrategyOSGI.throwException(RegistryStrategyOSGI.java:212)
    at org.eclipse.core.internal.registry.osgi.RegistryStrategyOSGI.createExecutableExtension(RegistryStrategyOSGI.java:198)
    at org.eclipse.core.internal.registry.ExtensionRegistry.createExecutableExtension(ExtensionRegistry.java:934)
    at org.eclipse.core.internal.registry.ConfigurationElement.createExecutableExtension(ConfigurationElement.java:246)
    at org.eclipse.core.internal.registry.ConfigurationElementHandle.createExecutableExtension(ConfigurationElementHandle.java:63)
    at org.eclipse.ui.internal.WorkbenchPlugin.createExtension(WorkbenchPlugin.java:282)
    at org.eclipse.ui.internal.registry.EditorDescriptor.createEditor(EditorDescriptor.java:230)
    at org.eclipse.ui.internal.EditorReference.createPart(EditorReference.java:322)
    at org.eclipse.ui.internal.e4.compatibility.CompatibilityPart.createPart(CompatibilityPart.java:300)
    at org.eclipse.ui.internal.e4.compatibility.CompatibilityEditor.createPart(CompatibilityEditor.java:66)
    at org.eclipse.ui.internal.e4.compatibility.CompatibilityPart.create(CompatibilityPart.java:338)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
    at java.lang.reflect.Method.invoke(Unknown Source)
    at org.eclipse.e4.core.internal.di.MethodRequestor.execute(MethodRequestor.java:58)
    at org.eclipse.e4.core.internal.di.InjectorImpl.processAnnotated(InjectorImpl.java:1001)
    at org.eclipse.e4.core.internal.di.InjectorImpl.processAnnotated(InjectorImpl.java:966)
    at org.eclipse.e4.core.internal.di.InjectorImpl.internalInject(InjectorImpl.java:139)
    at org.eclipse.e4.core.internal.di.InjectorImpl.internalMake(InjectorImpl.java:411)
    at org.eclipse.e4.core.internal.di.InjectorImpl.make(InjectorImpl.java:333)
    at org.eclipse.e4.core.contexts.ContextInjectionFactory.make(ContextInjectionFactory.java:202)
    at org.eclipse.e4.ui.internal.workbench.ReflectionContributionFactory.createFromBundle(ReflectionContributionFactory.java:91)
    at org.eclipse.e4.ui.internal.workbench.ReflectionContributionFactory.doCreate(ReflectionContributionFactory.java:60)
    at org.eclipse.e4.ui.internal.workbench.ReflectionContributionFactory.create(ReflectionContributionFactory.java:42)
    at org.eclipse.e4.ui.workbench.renderers.swt.ContributedPartRenderer.createWidget(ContributedPartRenderer.java:132)
    at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.createWidget(PartRenderingEngine.java:1015)
    at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.safeCreateGui(PartRenderingEngine.java:675)
    at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.safeCreateGui(PartRenderingEngine.java:781)
    at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.access$0(PartRenderingEngine.java:752)
    at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine$2.run(PartRenderingEngine.java:746)
    at org.eclipse.core.runtime.SafeRunner.run(SafeRunner.java:45) …

如何为计算引擎服务帐户或任何其他用户帐户创建和分配具有以下权限的角色

billing.accounts.get

billing.accounts.list

在设置权限时，我遇到了一个错误

Not applicable for project-level custom roles
These permissions can only be added to custom roles at the organization level; they have no effect at the project level or below.
billing.accounts.get
billing.accounts.getIamPolicy
billing.accounts.getPaymentInfo
billing.accounts.getSpendingInformation
billing.accounts.getUsageExportSpec
billing.accounts.list
billing.budgets.get
billing.budgets.list
billing.credits.list
billing.resourceAssociations.list
billing.subscriptions.get
billing.subscriptions.list

编辑：也无法在组织级别设置。有同样的错误

API：https : //cloudbilling.googleapis.com

错误信息：-

You do not have sufficient permissions to view this page
There was an error while loading /iam-admin/iam?authuser=2&folder=&organizationId=1010102021615.

You are missing at least one of the following required permissions:
Organization …

我已经安装了postgres。如何打开postgres命令行？当我打开命令提示符时，我有

Microsoft Windows [Version 10.0.17134.590]
(c) 2018 Microsoft Corporation. All rights reserved.

C:\Users\dhanr>

如何导航到 postgres 命令行，因为我的最终目标是运行pg_dump dbname > outfile命令。

我正在尝试使用String.replace（oldChar，newChar），但这将返回一个Changed字符串。例：

String tempString= "abc is very easy";
String replacedString=tempString.replace("very","not");
System.out.println("replacedString is "+replacedString);
System.out.println("tempString is "+tempString);

输出：

replacedString is abc is not easy
tempString is abc is very easy

所以我的问题是有什么方法可以替换字符串而不将其存储在另一个字符串中。

我想要输出

String tempString= "abc is very easy";
tempString.replace("very","not");
System.out.println("tempString is "+tempString);

如

tempString is abc is not easy.

通过使用替换功能。