diff --git a/core/cml-calcite/pom.xml b/core/cml-calcite/pom.xml
index ff6b00d62..301a7f777 100644
--- a/core/cml-calcite/pom.xml
+++ b/core/cml-calcite/pom.xml
@@ -25,6 +25,11 @@
             <artifactId>guava</artifactId>
         </dependency>
 
+        <dependency>
+            <groupId>io.cml</groupId>
+            <artifactId>cml-spi</artifactId>
+        </dependency>
+
         <dependency>
             <groupId>io.cml</groupId>
             <artifactId>trino-parser</artifactId>
diff --git a/core/cml-calcite/src/main/java/io/cml/calcite/CmlSchema.java b/core/cml-calcite/src/main/java/io/cml/calcite/CmlSchema.java
new file mode 100644
index 000000000..e5f35da81
--- /dev/null
+++ b/core/cml-calcite/src/main/java/io/cml/calcite/CmlSchema.java
@@ -0,0 +1,39 @@
+/*
+ * 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.
+ */
+
+package io.cml.calcite;
+
+import org.apache.calcite.schema.Table;
+import org.apache.calcite.schema.impl.AbstractSchema;
+
+import java.util.Map;
+
+import static java.util.Objects.requireNonNull;
+
+class CmlSchema
+        extends AbstractSchema
+{
+    private final Map<String, Table> tableMap;
+
+    public CmlSchema(Map<String, Table> tableMap)
+    {
+        this.tableMap = requireNonNull(tableMap, "tableMap is null");
+    }
+
+    @Override
+    protected Map<String, Table> getTableMap()
+    {
+        return tableMap;
+    }
+}
diff --git a/core/cml-calcite/src/main/java/io/cml/calcite/CmlSchemaUtil.java b/core/cml-calcite/src/main/java/io/cml/calcite/CmlSchemaUtil.java
new file mode 100644
index 000000000..adf23461f
--- /dev/null
+++ b/core/cml-calcite/src/main/java/io/cml/calcite/CmlSchemaUtil.java
@@ -0,0 +1,148 @@
+/*
+ * 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.
+ */
+
+package io.cml.calcite;
+
+import com.google.common.collect.ImmutableList;
+import io.cml.spi.metadata.ColumnMetadata;
+import io.cml.spi.metadata.TableMetadata;
+import io.cml.spi.type.PGType;
+import io.trino.sql.parser.ParsingOptions;
+import io.trino.sql.parser.SqlParser;
+import io.trino.sql.tree.Statement;
+import org.apache.calcite.adapter.java.JavaTypeFactory;
+import org.apache.calcite.config.CalciteConnectionConfigImpl;
+import org.apache.calcite.jdbc.CalciteSchema;
+import org.apache.calcite.jdbc.JavaTypeFactoryImpl;
+import org.apache.calcite.plan.ConventionTraitDef;
+import org.apache.calcite.plan.RelOptCluster;
+import org.apache.calcite.plan.RelOptPlanner;
+import org.apache.calcite.plan.volcano.VolcanoPlanner;
+import org.apache.calcite.prepare.CalciteCatalogReader;
+import org.apache.calcite.rel.type.RelDataType;
+import org.apache.calcite.rel.type.RelDataTypeFactory;
+import org.apache.calcite.rex.RexBuilder;
+import org.apache.calcite.schema.SchemaPlus;
+import org.apache.calcite.sql.SqlDialect;
+import org.apache.calcite.sql.dialect.BigQuerySqlDialect;
+import org.apache.calcite.tools.Frameworks;
+
+import java.util.List;
+
+import static com.google.common.collect.ImmutableMap.toImmutableMap;
+import static io.cml.spi.type.BigIntType.BIGINT;
+import static io.cml.spi.type.BooleanType.BOOLEAN;
+import static io.cml.spi.type.DoubleType.DOUBLE;
+import static io.cml.spi.type.IntegerType.INTEGER;
+import static io.cml.spi.type.VarcharType.VARCHAR;
+
+public final class CmlSchemaUtil
+{
+    private CmlSchemaUtil() {}
+
+    public enum Dialect
+    {
+        BIGQUERY(BigQuerySqlDialect.DEFAULT);
+
+        private final SqlDialect sqlDialect;
+
+        Dialect(SqlDialect sqlDialect)
+        {
+            this.sqlDialect = sqlDialect;
+        }
+    }
+
+    public static String convertQuery(Dialect dialect, SchemaPlusInfo schemaPlusInfo, String sql)
+    {
+        SqlParser sqlParser = new SqlParser();
+        Statement stmt = sqlParser.createStatement(sql, new ParsingOptions());
+        RelOptCluster cluster = newCluster();
+
+        SchemaPlus schemaPlus = get(schemaPlusInfo);
+        CalciteCatalogReader reader = new CalciteCatalogReader(
+                CalciteSchema.from(schemaPlus),
+                ImmutableList.of(),
+                cluster.getTypeFactory(),
+                CalciteConnectionConfigImpl.DEFAULT);
+
+        // TODO: uncomment this when CalciteRelConverter finished
+        // RelNode relNode = CalciteRelConverter.convert(cluster, reader, stmt);
+        // RelToSqlConverter relToSqlConverter = new RelToSqlConverter(dialect.sqlDialect);
+        // SqlNode sqlNode = relToSqlConverter.visitRoot(relNode).asStatement();
+
+        // SqlPrettyWriter sqlPrettyWriter = new SqlPrettyWriter();
+        // return sqlPrettyWriter.format(sqlNode);
+        return "";
+    }
+
+    private static RelOptCluster newCluster()
+    {
+        RelDataTypeFactory typeFactory = new JavaTypeFactoryImpl();
+        RelOptPlanner planner = new VolcanoPlanner();
+        planner.addRelTraitDef(ConventionTraitDef.INSTANCE);
+        return RelOptCluster.create(planner, new RexBuilder(typeFactory));
+    }
+
+    private static SchemaPlus get(SchemaPlusInfo schemaPlusInfo)
+    {
+        SchemaPlus rootSchema = Frameworks.createRootSchema(true);
+        schemaPlusInfo.getSchemaTableMap()
+                .forEach((schema, tables) -> rootSchema.add(schema, toCmlSchema(tables)));
+
+        return rootSchema;
+    }
+
+    private static CmlTable toCmlTable(TableMetadata tableMetadata)
+    {
+        JavaTypeFactoryImpl typeFactory = new JavaTypeFactoryImpl();
+        RelDataTypeFactory.Builder builder = new RelDataTypeFactory.Builder(typeFactory);
+        for (ColumnMetadata columnMetadata : tableMetadata.getColumns()) {
+            builder.add(columnMetadata.getName(), toRelDataType(typeFactory, columnMetadata.getType()));
+        }
+
+        return new CmlTable(builder.build());
+    }
+
+    private static CmlSchema toCmlSchema(List<TableMetadata> tables)
+    {
+        return new CmlSchema(tables.stream().collect(
+
+                toImmutableMap(
+                        table -> table.getTable().getTableName(),
+                        CmlSchemaUtil::toCmlTable,
+                        // TODO: handle case sensitive table name
+                        (a, b) -> a)));
+    }
+
+    // TODO: handle nested types
+    private static RelDataType toRelDataType(JavaTypeFactory typeFactory, PGType<?> pgType)
+    {
+        if (pgType.equals(BOOLEAN)) {
+            return typeFactory.createJavaType(Boolean.class);
+        }
+        if (pgType.equals(INTEGER)) {
+            return typeFactory.createJavaType(Integer.class);
+        }
+        if (pgType.equals(BIGINT)) {
+            return typeFactory.createJavaType(Long.class);
+        }
+        if (pgType.equals(VARCHAR)) {
+            return typeFactory.createJavaType(String.class);
+        }
+        if (pgType.equals(DOUBLE)) {
+            return typeFactory.createJavaType(Double.class);
+        }
+        throw new UnsupportedOperationException(pgType.type() + " not supported yet");
+    }
+}
diff --git a/core/cml-calcite/src/main/java/io/cml/calcite/CmlTable.java b/core/cml-calcite/src/main/java/io/cml/calcite/CmlTable.java
new file mode 100644
index 000000000..e641f1d52
--- /dev/null
+++ b/core/cml-calcite/src/main/java/io/cml/calcite/CmlTable.java
@@ -0,0 +1,36 @@
+/*
+ * 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.
+ */
+
+package io.cml.calcite;
+
+import org.apache.calcite.rel.type.RelDataType;
+import org.apache.calcite.rel.type.RelDataTypeFactory;
+import org.apache.calcite.schema.impl.AbstractTable;
+
+class CmlTable
+        extends AbstractTable
+{
+    private final RelDataType rowType;
+
+    CmlTable(RelDataType relDataType)
+    {
+        this.rowType = relDataType;
+    }
+
+    @Override
+    public RelDataType getRowType(RelDataTypeFactory typeFactory)
+    {
+        return rowType;
+    }
+}
diff --git a/core/cml-calcite/src/main/java/io/cml/calcite/SchemaPlusInfo.java b/core/cml-calcite/src/main/java/io/cml/calcite/SchemaPlusInfo.java
new file mode 100644
index 000000000..a43b69695
--- /dev/null
+++ b/core/cml-calcite/src/main/java/io/cml/calcite/SchemaPlusInfo.java
@@ -0,0 +1,35 @@
+/*
+ * 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.
+ */
+
+package io.cml.calcite;
+
+import io.cml.spi.metadata.TableMetadata;
+
+import java.util.List;
+import java.util.Map;
+
+public class SchemaPlusInfo
+{
+    private final Map<String, List<TableMetadata>> schemaTableMap;
+
+    public SchemaPlusInfo(Map<String, List<TableMetadata>> schemaTableMap)
+    {
+        this.schemaTableMap = schemaTableMap;
+    }
+
+    public Map<String, List<TableMetadata>> getSchemaTableMap()
+    {
+        return schemaTableMap;
+    }
+}
diff --git a/core/cml-main/pom.xml b/core/cml-main/pom.xml
index bd3ddc86e..43688c32c 100644
--- a/core/cml-main/pom.xml
+++ b/core/cml-main/pom.xml
@@ -73,6 +73,11 @@
             <artifactId>guice</artifactId>
         </dependency>
 
+        <dependency>
+            <groupId>io.cml</groupId>
+            <artifactId>cml-calcite</artifactId>
+        </dependency>
+
         <dependency>
             <groupId>io.cml</groupId>
             <artifactId>cml-spi</artifactId>
diff --git a/core/cml-main/src/main/java/io/cml/connector/bigquery/BigQuerySqlConverter.java b/core/cml-main/src/main/java/io/cml/connector/bigquery/BigQuerySqlConverter.java
new file mode 100644
index 000000000..5b3a01bfd
--- /dev/null
+++ b/core/cml-main/src/main/java/io/cml/connector/bigquery/BigQuerySqlConverter.java
@@ -0,0 +1,51 @@
+/*
+ * 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.
+ */
+
+package io.cml.connector.bigquery;
+
+import io.cml.calcite.CmlSchemaUtil;
+import io.cml.calcite.SchemaPlusInfo;
+import io.cml.spi.connector.Connector;
+import io.cml.spi.metadata.TableMetadata;
+
+import javax.inject.Inject;
+
+import java.util.List;
+import java.util.Map;
+
+import static com.google.common.collect.ImmutableMap.toImmutableMap;
+import static java.util.Objects.requireNonNull;
+import static java.util.function.Function.identity;
+
+public class BigQuerySqlConverter
+{
+    private final SchemaPlusInfo schemaPlusInfo;
+
+    @Inject
+    public BigQuerySqlConverter(Connector bigQueryConnector)
+    {
+        final Connector connector = requireNonNull(bigQueryConnector, "BigQueryConnector is null");
+
+        List<String> schemas = connector.listSchemas();
+        Map<String, List<TableMetadata>> schemaTableMap = schemas.stream()
+                .collect(toImmutableMap(identity(), schema -> connector.listTables(schema)));
+
+        this.schemaPlusInfo = new SchemaPlusInfo(schemaTableMap);
+    }
+
+    public String convertSql(String sql)
+    {
+        return CmlSchemaUtil.convertQuery(CmlSchemaUtil.Dialect.BIGQUERY, schemaPlusInfo, sql);
+    }
+}
diff --git a/core/cml-server/src/main/java/io/cml/server/module/BigQueryConnectorModule.java b/core/cml-server/src/main/java/io/cml/server/module/BigQueryConnectorModule.java
index fa40a4dd4..70136ce29 100644
--- a/core/cml-server/src/main/java/io/cml/server/module/BigQueryConnectorModule.java
+++ b/core/cml-server/src/main/java/io/cml/server/module/BigQueryConnectorModule.java
@@ -28,6 +28,7 @@ import io.airlift.configuration.AbstractConfigurationAwareModule;
 import io.cml.connector.bigquery.BigQueryConfig;
 import io.cml.connector.bigquery.BigQueryConnector;
 import io.cml.connector.bigquery.BigQueryCredentialsSupplier;
+import io.cml.connector.bigquery.BigQuerySqlConverter;
 import io.cml.pgcatalog.builder.BigQueryPgCatalogTableBuilder;
 import io.cml.pgcatalog.builder.BigQueryPgFunctionBuilder;
 import io.cml.pgcatalog.builder.PgCatalogTableBuilder;
@@ -50,6 +51,7 @@ public class BigQueryConnectorModule
         binder.bind(PgCatalogTableBuilder.class).to(BigQueryPgCatalogTableBuilder.class).in(Scopes.SINGLETON);
         binder.bind(PgFunctionBuilder.class).to(BigQueryPgFunctionBuilder.class).in(Scopes.SINGLETON);
         binder.bind(PgMetadata.class).to(BigQueryPgMetadata.class).in(Scopes.SINGLETON);
+        binder.bind(BigQuerySqlConverter.class).in(Scopes.SINGLETON);
         configBinder(binder).bindConfig(BigQueryConfig.class);
     }
 
diff --git a/pom.xml b/pom.xml
index 37a00f8ac..f8063fc17 100644
--- a/pom.xml
+++ b/pom.xml
@@ -188,6 +188,12 @@
                 <version>1.15</version>
             </dependency>
 
+            <dependency>
+                <groupId>io.cml</groupId>
+                <artifactId>cml-calcite</artifactId>
+                <version>${project.version}</version>
+            </dependency>
+
             <dependency>
                 <groupId>io.cml</groupId>
                 <artifactId>cml-main</artifactId>
@@ -245,10 +251,18 @@
                         <groupId>commons-logging</groupId>
                         <artifactId>commons-logging</artifactId>
                     </exclusion>
+                    <exclusion>
+                        <groupId>org.apache.commons</groupId>
+                        <artifactId>commons-lang3</artifactId>
+                    </exclusion>
                     <exclusion>
                         <groupId>org.slf4j</groupId>
                         <artifactId>slf4j-api</artifactId>
                     </exclusion>
+                    <exclusion>
+                        <groupId>org.yaml</groupId>
+                        <artifactId>snakeyaml</artifactId>
+                    </exclusion>
                 </exclusions>
             </dependency>