Executing SQL in a Gradle task? - sql

Question

How can I execute SQL in a Gradle task?
configurations {
compile
}
repositories {
mavenCentral()
}
dependencies {
compile 'postgresql:postgresql:9.0-801.jdbc4'
}
task sql << {
driverName = 'org.postgresql.Driver'
Class.forName(driverName)
groovy.sql.Sql sql = Sql.newInstance(
'jdbc:postgresql://localhost:5432/postgres',
'username',
'password',
driverName
)
sql.execute 'create table test (id int not null)'
sql.execute 'insert into test (id) values(1)'
sql.eachRow 'select * from test' {
println it
}
}
I get a
java.lang.ClassNotFoundException: org.postgresql.Driver exception when executing the sql task.

Answer 1

To define external dependencies for the build script itself you got to put it into the build scripts' classpath. You can do that by defining it within the buildscript closure.
buildscript {
repositories {
mavenCentral()
}
dependencies {
classpath 'postgresql:postgresql:9.0-801.jdbc4'
}
}

Answer 2

If you don't mind depending on yet another tool, you can leverage dbdeploy in your project. There is also a gradle plugin that let you import SQL scripts as is.

Answer 3

buildscript {
dependencies {
classpath 'com.oracle:ojdbc6:11.2.0.3'
}
}
task tmp() {
dependsOn configurations.batch
doLast {
ant.sql(classpath: buildscript.configurations.classpath.asPath,
driver: "oracle.jdbc.OracleDriver",
url: "${dbConn}", userid: "${dbUser}", password: "${dbPass}",
"select 1 from dual")
}
}
Alternatively:
ant.sql(classpath: buildscript.configurations.classpath.asPath,
driver: "oracle.jdbc.OracleDriver",
url: "${dbConn}", userid: "${dbUser}", password: "${dbPass}") {
fileset(dir: dir) {
include(name: "**/*.sql")
}
}

Answer 4

Found runsql-gradle-plugin that allows executing SQL script files defined in custom Gradle task.
After adding these strings to my build.gradle.kts:
plugins {
id("com.nocwriter.runsql") version ("1.0.3")
}
task<RunSQL>("initData") {
dependencies {
implementation("org.postgresql:postgresql")
}
config {
url = "jdbc:postgresql://localhost:5432/test"
driverClassName = "org.postgresql.Driver"
username = "test"
password = "test"
scriptFile = "data.sql"
}
}
I could execute data.sql by:
./gradlew initData

Answer 5

Here is one way:
gradle.class.classLoader.addURL(new File('../../../../lib/server/mssql/sqljdbc4.jar').toURI().toURL())
def Sql sql = Sql.newInstance(dbConnectionURL, dbUserName, dbPassword, dbDriverName)
String sqlString = new File(dbSchemaFile as String).text
sql.execute(sqlString)