flink-connector-jdbc-db2/src/main/java/org/apache/flink/connector/jdbc/db2/database/dialect/Db2Dialect.java [136:155]:
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    @Override
    public Set<LogicalTypeRoot> supportedTypes() {
        // The data types used in Db2 are list at
        // https://www.ibm.com/docs/en/db2-for-zos/12?topic=columns-data-types

        return EnumSet.of(
                LogicalTypeRoot.CHAR,
                LogicalTypeRoot.VARCHAR,
                LogicalTypeRoot.BOOLEAN,
                LogicalTypeRoot.VARBINARY,
                LogicalTypeRoot.DECIMAL,
                LogicalTypeRoot.TINYINT,
                LogicalTypeRoot.SMALLINT,
                LogicalTypeRoot.INTEGER,
                LogicalTypeRoot.BIGINT,
                LogicalTypeRoot.FLOAT,
                LogicalTypeRoot.DOUBLE,
                LogicalTypeRoot.DATE,
                LogicalTypeRoot.TIME_WITHOUT_TIME_ZONE,
                LogicalTypeRoot.TIMESTAMP_WITHOUT_TIME_ZONE);
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flink-connector-jdbc-oceanbase/src/main/java/org/apache/flink/connector/jdbc/oceanbase/database/dialect/OceanBaseDialect.java [59:75]:
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    @Override
    public Set<LogicalTypeRoot> supportedTypes() {
        return EnumSet.of(
                LogicalTypeRoot.CHAR,
                LogicalTypeRoot.VARCHAR,
                LogicalTypeRoot.BOOLEAN,
                LogicalTypeRoot.VARBINARY,
                LogicalTypeRoot.DECIMAL,
                LogicalTypeRoot.TINYINT,
                LogicalTypeRoot.SMALLINT,
                LogicalTypeRoot.INTEGER,
                LogicalTypeRoot.BIGINT,
                LogicalTypeRoot.FLOAT,
                LogicalTypeRoot.DOUBLE,
                LogicalTypeRoot.DATE,
                LogicalTypeRoot.TIME_WITHOUT_TIME_ZONE,
                LogicalTypeRoot.TIMESTAMP_WITHOUT_TIME_ZONE);
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