[#1736] feat(postgresql): Support PostgreSQL index.

catalogs/catalog-jdbc-common/src/main/java/com/datastrato/gravitino/catalog/jdbc/bean/JdbcIndexBean.java

@@ -0,0 +1,76 @@
+/*
+ * Copyright 2024 Datastrato Pvt Ltd.
+ * This software is licensed under the Apache License version 2.
+ */
+package com.datastrato.gravitino.catalog.jdbc.bean;
+
+import com.datastrato.gravitino.rel.indexes.Index;
+import java.util.Objects;
+
+/** Store JDBC index information. */
+public class JdbcIndexBean {
+
+  private final Index.IndexType indexType;
+
+  private final String colName;
+
+  private final String name;
+
+  /** Used for sorting */
+  private final int order;
+
+  public JdbcIndexBean(Index.IndexType indexType, String colName, String name, int order) {
+    this.indexType = indexType;
+    this.colName = colName;
+    this.name = name;
+    this.order = order;
+  }
+
+  public Index.IndexType getIndexType() {
+    return indexType;
+  }
+
+  public String getColName() {
+    return colName;
+  }
+
+  public String getName() {
+    return name;
+  }
+
+  public int getOrder() {
+    return order;
+  }
+
+  @Override
+  public boolean equals(Object o) {
+    if (this == o) return true;
+    if (o == null || getClass() != o.getClass()) return false;
+    JdbcIndexBean that = (JdbcIndexBean) o;
+    return order == that.order
+        && indexType == that.indexType
+        && Objects.equals(colName, that.colName)
+        && Objects.equals(name, that.name);
+  }
+
+  @Override
+  public int hashCode() {
+    return Objects.hash(indexType, colName, name, order);
+  }
+
+  @Override
+  public String toString() {
+    return "JdbcIndexBean{"
+        + "indexType="
+        + indexType
+        + ", colName='"
+        + colName
+        + '\''
+        + ", name='"
+        + name
+        + '\''
+        + ", order="
+        + order
+        + '}';
+  }
+}

catalogs/catalog-jdbc-common/src/main/java/com/datastrato/gravitino/catalog/jdbc/operation/JdbcTableOperations.java

@@ -6,6 +6,7 @@
 
 import com.datastrato.gravitino.catalog.jdbc.JdbcColumn;
 import com.datastrato.gravitino.catalog.jdbc.JdbcTable;
+import com.datastrato.gravitino.catalog.jdbc.bean.JdbcIndexBean;
 import com.datastrato.gravitino.catalog.jdbc.converter.JdbcExceptionConverter;
 import com.datastrato.gravitino.catalog.jdbc.converter.JdbcTypeConverter;
 import com.datastrato.gravitino.catalog.jdbc.utils.JdbcConnectorUtils;
@@ -16,15 +17,19 @@
 import com.datastrato.gravitino.rel.TableChange;
 import com.datastrato.gravitino.rel.expressions.transforms.Transform;
 import com.datastrato.gravitino.rel.indexes.Index;
+import com.datastrato.gravitino.rel.indexes.Indexes;
 import com.google.common.collect.Lists;
 import java.sql.Connection;
 import java.sql.DatabaseMetaData;
 import java.sql.ResultSet;
 import java.sql.SQLException;
 import java.util.ArrayList;
 import java.util.Collections;
+import java.util.Comparator;
 import java.util.List;
 import java.util.Map;
+import java.util.Set;
+import java.util.stream.Collectors;
 import javax.sql.DataSource;
 import org.apache.commons.lang3.StringUtils;
 import org.slf4j.Logger;
@@ -239,7 +244,75 @@ protected void correctJdbcTableFields(
 
   protected List<Index> getIndexes(String databaseName, String tableName, DatabaseMetaData metaData)
       throws SQLException {
-    return Collections.emptyList();
+    List<Index> indexes = new ArrayList<>();
+
+    // Get primary key information
+    ResultSet primaryKeys = getPrimaryKeys(databaseName, tableName, metaData);
+    List<JdbcIndexBean> jdbcIndexBeans = new ArrayList<>();
+    while (primaryKeys.next()) {
+      jdbcIndexBeans.add(
+          new JdbcIndexBean(
+              Index.IndexType.PRIMARY_KEY,
+              primaryKeys.getString("COLUMN_NAME"),
+              primaryKeys.getString("PK_NAME"),
+              primaryKeys.getInt("KEY_SEQ")));
+    }
+
+    Set<String> primaryIndexNames =
+        jdbcIndexBeans.stream().map(JdbcIndexBean::getName).collect(Collectors.toSet());
+
+    // Get unique key information
+    ResultSet indexInfo = getIndexInfo(databaseName, tableName, metaData);
+    while (indexInfo.next()) {
+      String indexName = indexInfo.getString("INDEX_NAME");
+      if (!indexInfo.getBoolean("NON_UNIQUE") && !primaryIndexNames.contains(indexName)) {
+        jdbcIndexBeans.add(
+            new JdbcIndexBean(
+                Index.IndexType.UNIQUE_KEY,
+                indexInfo.getString("COLUMN_NAME"),
+                indexName,
+                indexInfo.getInt("ORDINAL_POSITION")));
+      }
+    }
+
+    // Assemble into Index
+    Map<Index.IndexType, List<JdbcIndexBean>> indexBeanGroupByIndexType =
+        jdbcIndexBeans.stream().collect(Collectors.groupingBy(JdbcIndexBean::getIndexType));
+
+    for (Map.Entry<Index.IndexType, List<JdbcIndexBean>> entry :
+        indexBeanGroupByIndexType.entrySet()) {
+      // Group by index Name
+      Map<String, List<JdbcIndexBean>> indexBeanGroupByName =
+          entry.getValue().stream().collect(Collectors.groupingBy(JdbcIndexBean::getName));
+      for (Map.Entry<String, List<JdbcIndexBean>> indexEntry : indexBeanGroupByName.entrySet()) {
+        List<String> colNames =
+            indexEntry.getValue().stream()
+                .sorted(Comparator.comparingInt(JdbcIndexBean::getOrder))
+                .map(JdbcIndexBean::getColName)
+                .collect(Collectors.toList());
+        String[][] colStrArrays = convertIndexFieldNames(colNames);
+        if (entry.getKey() == Index.IndexType.PRIMARY_KEY) {
+          indexes.add(Indexes.primary(indexEntry.getKey(), colStrArrays));
+        } else {
+          indexes.add(Indexes.unique(indexEntry.getKey(), colStrArrays));
+        }
+      }
+    }
+    return indexes;
+  }
+
+  protected ResultSet getIndexInfo(String databaseName, String tableName, DatabaseMetaData metaData)
+      throws SQLException {
+    return metaData.getIndexInfo(databaseName, null, tableName, false, false);
+  }
+
+  protected ResultSet getPrimaryKeys(
+      String databaseName, String tableName, DatabaseMetaData metaData) throws SQLException {
+    return metaData.getPrimaryKeys(databaseName, null, tableName);
+  }
+
+  protected String[][] convertIndexFieldNames(List<String> fieldNames) {
+    return fieldNames.stream().map(colName -> new String[] {colName}).toArray(String[][]::new);
   }
 
   protected abstract String generateCreateTableSql(

catalogs/catalog-jdbc-mysql/src/main/java/com/datastrato/gravitino/catalog/mysql/operation/MysqlTableOperations.java

@@ -20,10 +20,7 @@
 import com.datastrato.gravitino.rel.indexes.Index;
 import com.datastrato.gravitino.rel.indexes.Indexes;
 import com.google.common.base.Preconditions;
-import com.google.common.collect.HashMultimap;
-import com.google.common.collect.SetMultimap;
 import java.sql.Connection;
-import java.sql.DatabaseMetaData;
 import java.sql.PreparedStatement;
 import java.sql.ResultSet;
 import java.sql.SQLException;
@@ -35,7 +32,6 @@
 import java.util.List;
 import java.util.Map;
 import java.util.Optional;
-import java.util.Set;
 import java.util.stream.Collectors;
 import org.apache.commons.collections4.CollectionUtils;
 import org.apache.commons.collections4.MapUtils;
@@ -215,43 +211,6 @@ public static void appendIndexesSql(Index[] indexes, StringBuilder sqlBuilder) {
     }
   }
 
-  protected List<Index> getIndexes(String databaseName, String tableName, DatabaseMetaData metaData)
-      throws SQLException {
-    List<Index> indexes = new ArrayList<>();
-
-    // Get primary key information
-    SetMultimap<String, String> primaryKeyGroupByName = HashMultimap.create();
-    ResultSet primaryKeys = metaData.getPrimaryKeys(databaseName, null, tableName);
-    while (primaryKeys.next()) {
-      String columnName = primaryKeys.getString("COLUMN_NAME");
-      primaryKeyGroupByName.put(primaryKeys.getString("PK_NAME"), columnName);
-    }
-    for (String key : primaryKeyGroupByName.keySet()) {
-      indexes.add(Indexes.primary(key, convertIndexFieldNames(primaryKeyGroupByName.get(key))));
-    }
-
-    // Get unique key information
-    SetMultimap<String, String> indexGroupByName = HashMultimap.create();
-    ResultSet indexInfo = metaData.getIndexInfo(databaseName, null, tableName, false, false);
-    while (indexInfo.next()) {
-      String indexName = indexInfo.getString("INDEX_NAME");
-      if (!indexInfo.getBoolean("NON_UNIQUE")
-          && !StringUtils.equalsIgnoreCase(Indexes.DEFAULT_MYSQL_PRIMARY_KEY_NAME, indexName)) {
-        String columnName = indexInfo.getString("COLUMN_NAME");
-        indexGroupByName.put(indexName, columnName);
-      }
-    }
-    for (String key : indexGroupByName.keySet()) {
-      indexes.add(Indexes.unique(key, convertIndexFieldNames(indexGroupByName.get(key))));
-    }
-
-    return indexes;
-  }
-
-  private String[][] convertIndexFieldNames(Set<String> fieldNames) {
-    return fieldNames.stream().map(colName -> new String[] {colName}).toArray(String[][]::new);
-  }
-
   @Override
   protected boolean getAutoIncrementInfo(ResultSet resultSet) throws SQLException {
     return "YES".equalsIgnoreCase(resultSet.getString("IS_AUTOINCREMENT"));

catalogs/catalog-jdbc-postgresql/build.gradle.kts

@@ -20,6 +20,12 @@ dependencies {
   implementation(libs.commons.lang3)
   implementation(libs.commons.collections4)
   implementation(libs.jsqlparser)
+
+  testImplementation(libs.guava)
+  testImplementation(libs.commons.lang3)
+  testImplementation(libs.junit.jupiter.api)
+  testImplementation(libs.junit.jupiter.params)
+  testRuntimeOnly(libs.junit.jupiter.engine)
 }
 
 tasks {

catalogs/catalog-jdbc-postgresql/src/main/java/com/datastrato/gravitino/catalog/postgresql/operation/PostgreSqlTableOperations.java

@@ -16,6 +16,7 @@
 import com.datastrato.gravitino.rel.expressions.transforms.Transform;
 import com.datastrato.gravitino.rel.indexes.Index;
 import com.datastrato.gravitino.rel.types.Types;
+import com.google.common.annotations.VisibleForTesting;
 import com.google.common.base.Preconditions;
 import java.sql.Connection;
 import java.sql.DatabaseMetaData;
@@ -25,6 +26,7 @@
 import java.util.Arrays;
 import java.util.List;
 import java.util.Map;
+import java.util.stream.Collectors;
 import javax.sql.DataSource;
 import org.apache.commons.collections4.MapUtils;
 import org.apache.commons.lang3.ArrayUtils;
@@ -82,6 +84,7 @@ protected String generateCreateTableSql(
         sqlBuilder.append(",\n");
       }
     }
+    appendIndexesSql(indexes, sqlBuilder);
     sqlBuilder.append("\n)");
     // Add table properties if any
     if (MapUtils.isNotEmpty(properties)) {
@@ -120,6 +123,40 @@ protected String generateCreateTableSql(
     return result;
   }
 
+  @VisibleForTesting
+  static void appendIndexesSql(Index[] indexes, StringBuilder sqlBuilder) {
+    for (Index index : indexes) {
+      String fieldStr =
+          Arrays.stream(index.fieldNames())
+              .map(
+                  colNames -> {
+                    if (colNames.length > 1) {
+                      throw new IllegalArgumentException(
+                          "Index does not support complex fields in PostgreSQL");
+                    }
+                    return PG_QUOTE + colNames[0] + PG_QUOTE;
+                  })
+              .collect(Collectors.joining(", "));
+      sqlBuilder.append(",\n");
+      switch (index.type()) {
+        case PRIMARY_KEY:
+          if (StringUtils.isNotEmpty(index.name())) {
+            sqlBuilder.append("CONSTRAINT ").append(PG_QUOTE).append(index.name()).append(PG_QUOTE);
+          }
+          sqlBuilder.append(" PRIMARY KEY (").append(fieldStr).append(")");
+          break;
+        case UNIQUE_KEY:
+          if (StringUtils.isNotEmpty(index.name())) {
+            sqlBuilder.append("CONSTRAINT ").append(PG_QUOTE).append(index.name()).append(PG_QUOTE);
+          }
+          sqlBuilder.append(" UNIQUE (").append(fieldStr).append(")");
+          break;
+        default:
+          throw new IllegalArgumentException("PostgreSQL doesn't support index : " + index.type());
+      }
+    }
+  }
+
   private StringBuilder appendColumnDefinition(JdbcColumn column, StringBuilder sqlBuilder) {
     // Add data type
     sqlBuilder
@@ -440,6 +477,18 @@ private String updateColumnCommentFieldDefinition(
         + "';";
   }
 
+  @Override
+  protected ResultSet getIndexInfo(String schemaName, String tableName, DatabaseMetaData metaData)
+      throws SQLException {
+    return metaData.getIndexInfo(database, schemaName, tableName, false, false);
+  }
+
+  @Override
+  protected ResultSet getPrimaryKeys(String schemaName, String tableName, DatabaseMetaData metaData)
+      throws SQLException {
+    return metaData.getPrimaryKeys(database, schemaName, tableName);
+  }
+
   @Override
   protected Connection getConnection(String schema) throws SQLException {
     Connection connection = dataSource.getConnection();