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#164 Add the ability to create Hive tables via a JDBC connection.
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44 changes: 44 additions & 0 deletions
44
pramen/core/src/main/scala/za/co/absa/pramen/core/utils/hive/QueryExecutorJdbc.scala
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| Original file line number | Diff line number | Diff line change |
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| /* | ||
| * Copyright 2022 ABSA Group Limited | ||
| * | ||
| * Licensed under the Apache License, Version 2.0 (the "License"); | ||
| * you may not use this file except in compliance with the License. | ||
| * You may obtain a copy of the License at | ||
| * | ||
| * http://www.apache.org/licenses/LICENSE-2.0 | ||
| * | ||
| * Unless required by applicable law or agreed to in writing, software | ||
| * distributed under the License is distributed on an "AS IS" BASIS, | ||
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | ||
| * See the License for the specific language governing permissions and | ||
| * limitations under the License. | ||
| */ | ||
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| package za.co.absa.pramen.core.utils.hive | ||
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| import org.slf4j.LoggerFactory | ||
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| import java.sql.{Connection, ResultSet, SQLSyntaxErrorException} | ||
| import scala.util.Try | ||
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| class QueryExecutorJdbc(connection: Connection) extends QueryExecutor { | ||
| private val log = LoggerFactory.getLogger(this.getClass) | ||
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| override def doesTableExist(dbName: String, tableName: String): Boolean = { | ||
| val query = s"SELECT 1 FROM $tableName WHERE 0 = 1" | ||
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| Try { | ||
| execute(query) | ||
| }.isSuccess | ||
| } | ||
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| @throws[SQLSyntaxErrorException] | ||
| override def execute(query: String): Unit = { | ||
| log.info(s"Executing SQL: $query") | ||
| val statement = connection.createStatement(ResultSet.TYPE_FORWARD_ONLY, ResultSet.CONCUR_READ_ONLY) | ||
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| val resultSet = statement.executeQuery(query) | ||
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| resultSet.close() | ||
| } | ||
| } |
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86 changes: 86 additions & 0 deletions
86
.../core/src/test/scala/za/co/absa/pramen/core/tests/utils/hive/QueryExecutorJdbcSuite.scala
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,86 @@ | ||
| /* | ||
| * Copyright 2022 ABSA Group Limited | ||
| * | ||
| * Licensed under the Apache License, Version 2.0 (the "License"); | ||
| * you may not use this file except in compliance with the License. | ||
| * You may obtain a copy of the License at | ||
| * | ||
| * http://www.apache.org/licenses/LICENSE-2.0 | ||
| * | ||
| * Unless required by applicable law or agreed to in writing, software | ||
| * distributed under the License is distributed on an "AS IS" BASIS, | ||
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | ||
| * See the License for the specific language governing permissions and | ||
| * limitations under the License. | ||
| */ | ||
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| package za.co.absa.pramen.core.tests.utils.hive | ||
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| import org.scalatest.BeforeAndAfterAll | ||
| import org.scalatest.wordspec.AnyWordSpec | ||
| import za.co.absa.pramen.core.fixtures.RelationalDbFixture | ||
| import za.co.absa.pramen.core.samples.RdbExampleTable | ||
| import za.co.absa.pramen.core.utils.hive.QueryExecutorJdbc | ||
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| import java.sql.SQLSyntaxErrorException | ||
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| class QueryExecutorJdbcSuite extends AnyWordSpec with BeforeAndAfterAll with RelationalDbFixture { | ||
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| override protected def beforeAll(): Unit = { | ||
| super.beforeAll() | ||
| RdbExampleTable.Company.initTable(getConnection) | ||
| } | ||
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| override protected def afterAll(): Unit = { | ||
| RdbExampleTable.Company.dropTable(getConnection) | ||
| super.afterAll() | ||
| } | ||
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| "QueryExecutorJdbc" should { | ||
| "execute JDBC queries" in { | ||
| val connection = getConnection | ||
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| val qe = new QueryExecutorJdbc(connection) | ||
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| qe.execute("SELECT * FROM company") | ||
| } | ||
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| "execute CREATE TABLE queries" in { | ||
| val connection = getConnection | ||
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| val qe = new QueryExecutorJdbc(connection) | ||
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| qe.execute("CREATE TABLE my_table (id INT)") | ||
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| val exist = qe.doesTableExist(database, "my_table") | ||
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| assert(exist) | ||
| } | ||
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| "throw an exception on errors" in { | ||
| val qe = new QueryExecutorJdbc(getConnection) | ||
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| val ex = intercept[SQLSyntaxErrorException] { | ||
| qe.execute("SELECT * FROM does_not_exist") | ||
| } | ||
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| assert(ex.getMessage.contains("object not found")) | ||
| } | ||
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| "return true if the table is found" in { | ||
| val qe = new QueryExecutorJdbc(getConnection) | ||
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| val exist = qe.doesTableExist(database, "company") | ||
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| assert(exist) | ||
| } | ||
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| "return false if the table is not found" in { | ||
| val qe = new QueryExecutorJdbc(getConnection) | ||
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| val exist = qe.doesTableExist(database, "does_not_exist") | ||
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| assert(!exist) | ||
| } | ||
| } | ||
| } |
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