Postgresql中DDL的雙引號問題

org.jooq.exception.DataAccessException: SQL [insert into "public"."tb_purchase" ("id", "billId", "detid", "productid", "num", "price", "create_time", "update_time", "status") values (?, ?, ?, ?, ?, ?, cast(? as timestamp), cast(? as timestamp), ?)]; ERROR: column "billId" of relation "tb_purchase" does not exist
  Position: 57
        at org.jooq.impl.Tools.translate(Tools.java:1941)
        at org.jooq.impl.DefaultExecuteContext.sqlException(DefaultExecuteContext.java:659)
        at org.jooq.impl.AbstractQuery.execute(AbstractQuery.java:362)
        at org.jooq.impl.AbstractDelegatingQuery.execute(AbstractDelegatingQuery.java:135)
        ... ...
        at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:66)
        at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:802)
        at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1410)
        at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49)
        at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
        at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
        at java.lang.Thread.run(Thread.java:745)
Caused by: org.postgresql.util.PSQLException: ERROR: column "billId" of relation "tb_purchase" does not exist
  Position: 57
        at org.postgresql.core.v3.QueryExecutorImpl.receiveErrorResponse(QueryExecutorImpl.java:2310)
        at org.postgresql.core.v3.QueryExecutorImpl.processResults(QueryExecutorImpl.java:2023)
        at org.postgresql.core.v3.QueryExecutorImpl.execute(QueryExecutorImpl.java:217)
        at org.postgresql.jdbc.PgStatement.execute(PgStatement.java:421)
        at org.postgresql.jdbc.PgPreparedStatement.executeWithFlags(PgPreparedStatement.java:166)
        at org.postgresql.jdbc.PgPreparedStatement.execute(PgPreparedStatement.java:159)
        at com.mchange.v2.c3p0.impl.NewProxyPreparedStatement.execute(NewProxyPreparedStatement.java:989)
        at org.jooq.tools.jdbc.DefaultPreparedStatement.execute(DefaultPreparedStatement.java:194)
        at org.jooq.impl.AbstractQuery.execute(AbstractQuery.java:430)
        at org.jooq.impl.AbstractDMLQuery.execute(AbstractDMLQuery.java:334)
        at org.jooq.impl.AbstractQuery.execute(AbstractQuery.java:348)
        ... 101 more

檢視資料庫，這個表確實有這個欄位，匯出ddl，發現表名、欄位名都有雙引號，去掉雙引號重新建立表，還是報錯，最後發現是由於雙引號裡面的字元區分大小寫。

PostgreSQL is following the SQL standard and in that case that means that identifiers (table names, column names, etc) are forced to lowercase, except when they are quoted. So when you create a table like this:

CREATE TABLE APP_USER ... 

you actually get a table app_user. You apparently did:

CREATE TABLE "APP_USER" ... 

and then you get a table "APP_USER".

In Spring, you specify a regular string for the table name, in capital letters, but that gets spliced into a query to the PostgreSQL server without quotes. You can check this by reading the PostgreSQL log files: it should show the query that Spring generated followed by the error at the top of your message.

Since you have very little control over how Spring constructs queries from entities, you are better off using SQL-standard lower-case identifiers