在flywaydb中，我需要确定该表是否已存在于数据库中。如果是这样，请跳过表的创建，否则创建。我试过这个，我在日志中得到了奇怪的错误..
迁移文件夹中的Sql
declare
c number:=0;
begin
SELECT count(*) into c
FROM dba_tables where table_name = 'sample_table' AND OWNER='TDS_INT';
if c = 0 then
CREATE TABLE TDS_INT.sample_table
(
sample_id NUMBER(19) ,
WORK_ORDER_ID VARCHAR2(20) CONSTRAINT TBT895_CK_010_N NOT NULL,
TASK_TYPE VARCHAR2(8) CONSTRAINT TBT895_CK_015_N NOT NULL,
LEAD_TIME VARCHAR2(20) CONSTRAINT TBT895_CK_025_N NOT NULL,
LAST_MODIFIED_DATE DATE CONSTRAINT TBT895_CK_030_N NOT NULL,
LAST_MODIFIED_USERID VARCHAR2(8) CONSTRAINT TBT895_CK_035_N NOT NULL
);
end if;
end;
错误日志：
Migrating schema "ASAP" to version 2.1 - create sample table
DEBUG: Executing SQL: declare
c number:=0;
begin
SELECT count(*) into c
FROM dba_tables where table_name = 'sample_table' AND OWNER='TDS_INT';
if c = 0 then
CREATE TABLE TDS_INT.sample_table
(
sample_id NUMBER(1
9) ,
WORK_ORDER_ID VARCHAR2(20)
CONSTRAINT TBT895_CK_010_N NOT NULL,
TASK_TYPE VARCHAR2(8)
CONSTRAINT TBT895_CK_015_N NOT NULL,
LEAD_TIME VARCHAR2
(20) CONSTRAINT TBT895_CK_025_N NOT NULL,
LAST_MODIFIED_DATE DATE
CONSTRAINT TBT895_CK_030_N NOT NULL,
LAST_MODIFIED_USERID VARCHAR2(8)
CONSTRAINT TBT895_CK_035_N NOT NULL
);
end if;
end;
DEBUG: Rolling back transaction...
DEBUG: Transaction rolled back
ERROR: Migration of schema "ASAP" to version 2.1 - create sample table failed! P
lease restore backups and roll back database and code!
DEBUG: MetaData table "ASAP"."schema_version" successfully updated to reflect ch
anges
ERROR: Unexpected error
org.flywaydb.core.internal.dbsupport.FlywaySqlScriptException:
Migration V2_1__create_sample_table.sql failed
----------------------------------------------
SQL State : 65000
Error Code : 6550
Message : ORA-06550: line 8, column 5:
PLS-00103: Encountered the symbol "CREATE" when expecting one of the following:
begin case declare exit for goto if loop mod null pragma
raise return select update while with <an identifier>
<a double-quoted delimited-identifier> <a bind variable> <<
close current delete fetch lock insert open rollback
savepoint set sql execute commit forall merge pipe
The symbol "lock was inserted before "CREATE" to continue.
ORA-06550: line 9, column 4:
PLS-00103: Encountered the symbol "(" when expecting one of the following:
. , @ in <an identifier>
<a double-quoted delimited-identifier> partition subpartition
ORA-06550: line 11, column 36:
PLS-00103: Encountered the symbol "CONSTRAINT" when expecting one of the followi
ng:
:= ) , not null default external character
The symbol "," was substituted for "CONSTRAINT" to continue.
ORA-06550: line 12, column 35:
PLS-00103: Encountered the symbol "CONSTRAINT" when expecting one of the followi
ng:
:= ) , not null default external character
The symbol "," was substituted for "CONSTRAINT" to continue.
ORA-06550: line 13, column 33:
PLS-00103: Encountered the symbol "CONSTRAINT" when expecting one of the followi
ng:
:= ) , not null default external character
The symbol "," was substituted for "CONSTRAINT" to continue.
ORA-06550: line 14, column 34:
PLS-00103: Encountered the symbol "CONSTRAINT" when expecting one of the followi
ng:
:= . ( ) , @ % not null range with default external character
The symbol "," was substituted for "CONSTRAINT" to continue.
ORA-06550: line 15, column 40:
PLS-00103: Encountered the symbol "CONSTRAINT" when expecting one of the followi
ng:
:= ) , not null default external character
The symbol "," was substituted for "CONSTRAINT" to continue.
ORA-06550: line 18, column 3:
PLS-00103: Encountered the symbol "END" when expecting one of the following:
begin function package pragma procedure subtype type use
<an identifier> <a double-quoted delimited-identifier> form
current cursor
Location : C:/Project/Tools/Migrations/V2_1__create_sample_table.sql (C:\Proje
ct\Tools\Migrations\V2_1__create_sample_table.sql)
Line : 1
Statement : declare
c number:=0;
begin
SELECT count(*) into c
FROM dba_tables where table_name = 'sample_table' AND OWNER='TDS_INT';
if c = 0 then
CREATE TABLE TDS_INT.sample_table
(
sample_id NUMBER(1
9) ,
WORK_ORDER_ID VARCHAR2(20)
CONSTRAINT TBT895_CK_010_N NOT NULL,
TASK_TYPE VARCHAR2(8)
CONSTRAINT TBT895_CK_015_N NOT NULL,
LEAD_TIME VARCHAR2
(20) CONSTRAINT TBT895_CK_025_N NOT NULL,
LAST_MODIFIED_DATE DATE
CONSTRAINT TBT895_CK_030_N NOT NULL,
LAST_MODIFIED_USERID VARCHAR2(8)
CONSTRAINT TBT895_CK_035_N NOT NULL
);
end if;
end;
at org.flywaydb.core.internal.dbsupport.SqlScript.execute(SqlScript.java
:117)
at org.flywaydb.core.internal.resolver.sql.SqlMigrationExecutor.execute(
SqlMigrationExecutor.java:71)
at org.flywaydb.core.internal.command.DbMigrate.doMigrate(DbMigrate.java
:352)
at org.flywaydb.core.internal.command.DbMigrate.access$1100(DbMigrate.ja
va:47)
at org.flywaydb.core.internal.command.DbMigrate$4.doInTransaction(DbMigr
ate.java:308)
at org.flywaydb.core.internal.util.jdbc.TransactionTemplate.execute(Tran
sactionTemplate.java:72)
at org.flywaydb.core.internal.command.DbMigrate.applyMigration(DbMigrate
.java:305)
at org.flywaydb.core.internal.command.DbMigrate.access$1000(DbMigrate.ja
va:47)
at org.flywaydb.core.internal.command.DbMigrate$2.doInTransaction(DbMigr
ate.java:230)
at org.flywaydb.core.internal.command.DbMigrate$2.doInTransaction(DbMigr
ate.java:173)
at org.flywaydb.core.internal.util.jdbc.TransactionTemplate.execute(Tran
sactionTemplate.java:72)
at org.flywaydb.core.internal.command.DbMigrate.migrate(DbMigrate.java:1
73)
at org.flywaydb.core.Flyway$1.execute(Flyway.java:959)
at org.flywaydb.core.Flyway$1.execute(Flyway.java:917)
at org.flywaydb.core.Flyway.execute(Flyway.java:1373)
at org.flywaydb.core.Flyway.migrate(Flyway.java:917)
at org.flywaydb.commandline.Main.executeOperation(Main.java:139)
at org.flywaydb.commandline.Main.main(Main.java:102)
Caused by: java.sql.SQLException: ORA-06550: line 8, column 5:
PLS-00103: Encountered the symbol "CREATE" when expecting one of the following:
begin case declare exit for goto if loop mod null pragma
raise return select update while with <an identifier>
<a double-quoted delimited-identifier> <a bind variable> <<
close current delete fetch lock insert open rollback
savepoint set sql execute commit forall merge pipe
The symbol "lock was inserted before "CREATE" to continue.
ORA-06550: line 9, column 4:
PLS-00103: Encountered the symbol "(" when expecting one of the following:
. , @ in <an identifier>
<a double-quoted delimited-identifier> partition subpartition
ORA-06550: line 11, column 36:
PLS-00103: Encountered the symbol "CONSTRAINT" when expecting one of the followi
ng:
:= ) , not null default external character
The symbol "," was substituted for "CONSTRAINT" to continue.
ORA-06550: line 12, column 35:
PLS-00103: Encountered the symbol "CONSTRAINT" when expecting one of the followi
ng:
:= ) , not null default external character
The symbol "," was substituted for "CONSTRAINT" to continue.
ORA-06550: line 13, column 33:
PLS-00103: Encountered the symbol "CONSTRAINT" when expecting one of the followi
ng:
:= ) , not null default external character
The symbol "," was substituted for "CONSTRAINT" to continue.
ORA-06550: line 14, column 34:
PLS-00103: Encountered the symbol "CONSTRAINT" when expecting one of the followi
ng:
:= . ( ) , @ % not null range with default external character
The symbol "," was substituted for "CONSTRAINT" to continue.
ORA-06550: line 15, column 40:
PLS-00103: Encountered the symbol "CONSTRAINT" when expecting one of the followi
ng:
:= ) , not null default external character
The symbol "," was substituted for "CONSTRAINT" to continue.
ORA-06550: line 18, column 3:
PLS-00103: Encountered the symbol "END" when expecting one of the following:
begin function package pragma procedure subtype type use
<an identifier> <a double-quoted delimited-identifier> form
current cursor
at oracle.jdbc.driver.T4CTTIoer.processError(T4CTTIoer.java:439)
at oracle.jdbc.driver.T4CTTIoer.processError(T4CTTIoer.java:395)
at oracle.jdbc.driver.T4C8Oall.processError(T4C8Oall.java:802)
at oracle.jdbc.driver.T4CTTIfun.receive(T4CTTIfun.java:436)
at oracle.jdbc.driver.T4CTTIfun.doRPC(T4CTTIfun.java:186)
at oracle.jdbc.driver.T4C8Oall.doOALL(T4C8Oall.java:521)
at oracle.jdbc.driver.T4CStatement.doOall8(T4CStatement.java:194)
at oracle.jdbc.driver.T4CStatement.executeForRows(T4CStatement.java:1000
)
at oracle.jdbc.driver.OracleStatement.doExecuteWithTimeout(OracleStateme
nt.java:1307)
at oracle.jdbc.driver.OracleStatement.executeInternal(OracleStatement.ja
va:1882)
at oracle.jdbc.driver.OracleStatement.execute(OracleStatement.java:1847)
at oracle.jdbc.driver.OracleStatementWrapper.execute(OracleStatementWrap
per.java:301)
at org.flywaydb.core.internal.dbsupport.JdbcTemplate.executeStatement(Jd
bcTemplate.java:238)
at org.flywaydb.core.internal.dbsupport.SqlScript.execute(SqlScript.java
:114)
... 17 more
答案 0 :(得分：1)
Flyway将执行每个迁移脚本，并且不会提示您是否执行它。这取决于你编写正确的代码来创建表。但是，如果您有创建和迁移数据库的flyway，那么您应该没有检查现有表的情况。 我只能考虑在没有Flyway支持的情况下从不同版本迁移到Flyway托管数据库。
上次我遇到这个问题（不是用oracle）我使用了两个小的迁移脚本。第一个脚本包含一个真正的SQL过程，其中存在检查表和创建。第二个脚本包含删除SQL过程。