wuchong commented on a change in pull request #9029: [FLINK-13118][jdbc]
Introduce JDBC table factory and bridge JDBC table source with streaming table
source
URL: https://github.com/apache/flink/pull/9029#discussion_r302523552
##########
File path:
flink-connectors/flink-jdbc/src/main/java/org/apache/flink/api/java/io/jdbc/JDBCTableSource.java
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@@ -74,12 +122,74 @@ public static Builder builder() {
return new Builder();
}
+ private JDBCInputFormat getInputFormat() {
+ JDBCInputFormat.JDBCInputFormatBuilder builder =
JDBCInputFormat.buildJDBCInputFormat()
+ .setDrivername(options.getDriverName())
+ .setDBUrl(options.getDbURL())
+ .setUsername(options.getUsername())
+ .setPassword(options.getPassword())
+ .setRowTypeInfo(new
RowTypeInfo(returnType.getFieldTypes(), returnType.getFieldNames()));
+
+ if (scanOptions.getFetchSize() != 0) {
+ builder.setFetchSize(scanOptions.getFetchSize());
+ }
+
+ final JDBCDialect dialect = options.getDialect();
+ String query = dialect.getSelectFromStatement(
+ options.getTableName(), returnType.getFieldNames(), new
String[0]);
+ if (scanOptions.getPartitionColumnName() != null) {
+ long lowerBound = scanOptions.getPartitionLowerBound();
+ long upperBound = scanOptions.getPartitionUpperBound();
+ int numPartitions = scanOptions.getNumPartitions();
+ builder.setParametersProvider(
+ new
NumericBetweenParametersProvider(lowerBound,
upperBound).ofBatchNum(numPartitions));
+ query += " WHERE " +
+
dialect.quoteIdentifier(scanOptions.getPartitionColumnName()) +
+ " BETWEEN ? AND ?";
+ }
+ builder.setQuery(query);
+
+ return builder.finish();
+ }
+
+ private void calculateReturnType() {
Review comment:
Move the content of this method to constructor and we can mark `returnType`
final.
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