我正在尝试创建一个新表,但在下面的语句中“CONSTRAINT”处或附近不断出现语法错误
。我已经确保在声明的最后一列之后有一个 ,
,即 CONSTRAINT 行正上方的 Tags
。有谁知道为什么会发生这种情况?所有声明约束的在线示例似乎都涉及 CREATE TABLE 语句,而不是 CREATE TABLE AS 语句。这有关系吗?感谢您的帮助!
顺便说一句,下面的约束行是从我已经创建的表中复制/粘贴的,该表使用 CREATE TABLE 语句,而不是 CREATE TABLE AS 语句,这就是为什么我询问约束是否不适用于 CREATE TABLE AS 语句。
CREATE TABLE "2017Projects" AS
SELECT
"STAGING_PROJECTS"."_PROJECT_NUMBER",
"STAGING_PROJECTS"."_PROJECT_DESCRIPTION",
"STAGING_PROJECTS"."_PROJECT_STATUS",
"STAGING_PROJECTS"."_TEMPLATE_FLAG",
"STAGING_PROJECTS"."_PROJECT_START_DATE",
"STAGING_PROJECTS"."_PROJECT_COMPLETION_DATE",
"STAGING_PROJECTS"."_COMPANY",
"STAGING_PROJECTS"."_LOCATION_NUMBER",
"STAGING_TASKS"."_PARENT_TASK_NUMBER",
"STAGING_TASKS"."_PARENT_TASK_DESCRIPTION",
"STAGING_TASKS"."_TASK_NUMBER",
"STAGING_TASKS"."_TASK_DESCRIPTION",
"STAGING_TASKS"."_TASK_START_DATE",
"STAGING_TASKS"."_TASK_COMPLETION_DATE",
"STAGING_TASKS"."_EBS_ACCOUNT",
"STAGING_TASKS"."_FUSION_ACCOUNT",
CASE
WHEN left("STAGING_PROJECTS"."_PROJECT_NUMBER",2) = 'C0' THEN
'('||"STAGING_PROJECTS"."_PROJECT_NUMBER"||') '||"STAGING_PROJECTS"."_PROJECT_DESCRIPTION"
ELSE
"STAGING_PROJECTS"."_PROJECT_DESCRIPTION"
END AS "Project",
'('||"STAGING_TASKS"."_TASK_NUMBER"||') '||"STAGING_TASKS"."_TASK_DESCRIPTION" AS "Task",
NULL AS "Investment_Priority",
NULL AS "Class",
NULL AS "Tags",
--ERROR ON NEXT LINE HERE!!!
CONSTRAINT "2017Projects_pk" PRIMARY KEY ("_PROJECT_NUMBER", "_TASK_NUMBER")
FROM
"STAGING_PROJECTS";
最佳答案
您需要使用第二条语句添加约束:
CREATE TABLE "2017Projects" AS
SELECT
"STAGING_PROJECTS"."_PROJECT_NUMBER",
...,
NULL AS "Tags"
FROM
"STAGING_PROJECTS";
ALTER TABLE "2017Projects" ADD CONSTRAINT "2017Projects_pk"
PRIMARY KEY ("_PROJECT_NUMBER", "_TASK_NUMBER")
CREATE TABLE
和 ALTER TABLE
语句应在单个事务中运行。
请查看this great Stack DBA article ,@a_horse_with_no_name 作为贡献者。
关于postgresql - "CONSTRAINT"处或附近的语法错误 PostgreSQL,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/38076252/