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fix: Compatibility ClickHouse cluster with Nullable(Nothing) type #63336

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fix: Compatibility ClickHouse cluster with Nullable(Nothing) type #63336

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7 changes: 6 additions & 1 deletion fe/fe-core/src/main/java/org/apache/doris/datasource/jdbc/client/JdbcClickHouseClient.java
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Original file line number Diff line number Diff line change
Expand Up @@ -50,6 +50,9 @@ protected JdbcClickHouseClient(JdbcClientConfig jdbcClientConfig) {
}
}

protected JdbcClickHouseClient() {
}

@Override
public List<String> getDatabaseNameList() {
Connection conn = null;
Expand Down Expand Up @@ -123,7 +126,7 @@ protected String getCatalogName(Connection conn) throws SQLException {

@Override
protected String[] getTableTypes() {
return new String[] {"TABLE", "VIEW", "SYSTEM TABLE"};
return new String[] { "TABLE", "VIEW", "SYSTEM TABLE" };
}

@Override
Expand Down Expand Up @@ -185,6 +188,8 @@ protected Type jdbcTypeToDoris(JdbcFieldSchema fieldSchema) {
return Type.BOOLEAN;
case "Int8":
return Type.TINYINT;
case "Nothing":
return Type.TINYINT;
case "Int16":
case "UInt8":
return Type.SMALLINT;
Expand Down
3 changes: 3 additions & 0 deletions fe/fe-core/src/main/java/org/apache/doris/datasource/jdbc/client/JdbcClient.java
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Expand Up @@ -121,6 +121,9 @@ protected void setJdbcDriverSystemProperties() {
System.setProperty("com.zaxxer.hikari.useWeakReferences", "true");
}

protected JdbcClient() {
}

// Initialize DataSource
private void initializeDataSource(JdbcClientConfig config) {
ClassLoader oldClassLoader = Thread.currentThread().getContextClassLoader();
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