docs: create samples for quickstart guide

[olavloite]

Adds snippets for a Getting Started guide for JDBC.

[snippet-bot]

Here is the summary of changes.

You are about to add 34 region tags.

• samples/snippets/src/main/java/com/example/spanner/jdbc/JdbcSample.java:108, tag spanner_insert_data
• samples/snippets/src/main/java/com/example/spanner/jdbc/JdbcSample.java:109, tag spanner_postgresql_insert_data
• samples/snippets/src/main/java/com/example/spanner/jdbc/JdbcSample.java:134, tag spanner_create_database
• samples/snippets/src/main/java/com/example/spanner/jdbc/JdbcSample.java:190, tag spanner_postgresql_create_database
• samples/snippets/src/main/java/com/example/spanner/jdbc/JdbcSample.java:252, tag spanner_create_jdbc_connection
• samples/snippets/src/main/java/com/example/spanner/jdbc/JdbcSample.java:278, tag spanner_create_jdbc_connection_with_emulator
• samples/snippets/src/main/java/com/example/spanner/jdbc/JdbcSample.java:305, tag spanner_dml_getting_started_insert
• samples/snippets/src/main/java/com/example/spanner/jdbc/JdbcSample.java:349, tag spanner_postgresql_dml_getting_started_insert
• samples/snippets/src/main/java/com/example/spanner/jdbc/JdbcSample.java:393, tag spanner_dml_batch
• samples/snippets/src/main/java/com/example/spanner/jdbc/JdbcSample.java:435, tag spanner_postgresql_dml_batch
• samples/snippets/src/main/java/com/example/spanner/jdbc/JdbcSample.java:477, tag spanner_insert_data
• samples/snippets/src/main/java/com/example/spanner/jdbc/JdbcSample.java:524, tag spanner_postgresql_insert_data
• samples/snippets/src/main/java/com/example/spanner/jdbc/JdbcSample.java:571, tag spanner_query_data
• samples/snippets/src/main/java/com/example/spanner/jdbc/JdbcSample.java:601, tag spanner_postgresql_query_data
• samples/snippets/src/main/java/com/example/spanner/jdbc/JdbcSample.java:631, tag spanner_query_with_parameter
• samples/snippets/src/main/java/com/example/spanner/jdbc/JdbcSample.java:663, tag spanner_postgresql_query_with_parameter
• samples/snippets/src/main/java/com/example/spanner/jdbc/JdbcSample.java:695, tag spanner_add_column
• samples/snippets/src/main/java/com/example/spanner/jdbc/JdbcSample.java:715, tag spanner_postgresql_add_column
• samples/snippets/src/main/java/com/example/spanner/jdbc/JdbcSample.java:735, tag spanner_ddl_batch
• samples/snippets/src/main/java/com/example/spanner/jdbc/JdbcSample.java:774, tag spanner_postgresql_ddl_batch
• samples/snippets/src/main/java/com/example/spanner/jdbc/JdbcSample.java:813, tag spanner_update_data
• samples/snippets/src/main/java/com/example/spanner/jdbc/JdbcSample.java:859, tag spanner_postgresql_update_data
• samples/snippets/src/main/java/com/example/spanner/jdbc/JdbcSample.java:905, tag spanner_query_data_with_new_column
• samples/snippets/src/main/java/com/example/spanner/jdbc/JdbcSample.java:939, tag spanner_postgresql_query_data_with_new_column
• samples/snippets/src/main/java/com/example/spanner/jdbc/JdbcSample.java:973, tag spanner_dml_getting_started_update
• samples/snippets/src/main/java/com/example/spanner/jdbc/JdbcSample.java:1064, tag spanner_postgresql_dml_getting_started_update
• samples/snippets/src/main/java/com/example/spanner/jdbc/JdbcSample.java:1154, tag spanner_transaction_and_statement_tag
• samples/snippets/src/main/java/com/example/spanner/jdbc/JdbcSample.java:1220, tag spanner_postgresql_transaction_and_statement_tag
• samples/snippets/src/main/java/com/example/spanner/jdbc/JdbcSample.java:1286, tag spanner_read_only_transaction
• samples/snippets/src/main/java/com/example/spanner/jdbc/JdbcSample.java:1340, tag spanner_postgresql_read_only_transaction
• samples/snippets/src/main/java/com/example/spanner/jdbc/JdbcSample.java:1394, tag spanner_data_boost
• samples/snippets/src/main/java/com/example/spanner/jdbc/JdbcSample.java:1429, tag spanner_postgresql_data_boost
• samples/snippets/src/main/java/com/example/spanner/jdbc/JdbcSample.java:1466, tag spanner_partitioned_dml
• samples/snippets/src/main/java/com/example/spanner/jdbc/JdbcSample.java:1494, tag spanner_postgresql_partitioned_dml

---

This comment is generated by snippet-bot.
If you find problems with this result, please file an issue at:
https://github.com/googleapis/repo-automation-bots/issues.
To update this comment, add snippet-bot:force-run label or use the checkbox below:

• Refresh this comment