Alternative fix for #1282 which adds tableTypes to DbType

Author: Jolanrensen

dataframe-jdbc/api/dataframe-jdbc.api

@@ -120,6 +120,7 @@ public abstract class org/jetbrains/kotlinx/dataframe/io/db/DbType {
 	public abstract fun convertSqlTypeToKType (Lorg/jetbrains/kotlinx/dataframe/io/TableColumnMetadata;)Lkotlin/reflect/KType;
 	public final fun getDbTypeInJdbcUrl ()Ljava/lang/String;
 	public abstract fun getDriverClassName ()Ljava/lang/String;
+	public fun getTableTypes ()Ljava/util/List;
 	public abstract fun isSystemTable (Lorg/jetbrains/kotlinx/dataframe/io/TableMetadata;)Z
 	public fun sqlQueryLimit (Ljava/lang/String;I)Ljava/lang/String;
 	public static synthetic fun sqlQueryLimit$default (Lorg/jetbrains/kotlinx/dataframe/io/db/DbType;Ljava/lang/String;IILjava/lang/Object;)Ljava/lang/String;

dataframe-jdbc/src/main/kotlin/org/jetbrains/kotlinx/dataframe/io/db/DbType.kt

@@ -2,7 +2,10 @@ package org.jetbrains.kotlinx.dataframe.io.db
 
 import org.jetbrains.kotlinx.dataframe.io.TableColumnMetadata
 import org.jetbrains.kotlinx.dataframe.io.TableMetadata
+import org.jetbrains.kotlinx.dataframe.io.getSchemaForAllSqlTables
+import org.jetbrains.kotlinx.dataframe.io.readAllSqlTables
 import org.jetbrains.kotlinx.dataframe.schema.ColumnSchema
+import java.sql.DatabaseMetaData
 import java.sql.ResultSet
 import kotlin.reflect.KType
 
@@ -21,6 +24,19 @@ public abstract class DbType(public val dbTypeInJdbcUrl: String) {
      */
     public abstract val driverClassName: String
 
+    /**
+     * The table type(s) (`TABLE_TYPE`) of ordinary tables in the SQL database, used by
+     * [getSchemaForAllSqlTables], and [readAllSqlTables] as a filter when querying the database
+     * for all the tables it has using [DatabaseMetaData.getTables].
+     *
+     * This is usually "TABLE" or "BASE TABLE", which is what [tableTypes] is set to by default,
+     * but it can be overridden to any custom list of table types, or `null` to let the JDBC integration
+     * return all types of tables.
+     *
+     * See [DatabaseMetaData.getTableTypes] for all supported table types of your specific database.
+     */
+    public open val tableTypes: List<String>? = listOf("TABLE", "BASE TABLE")
+
     /**
      * Returns a [ColumnSchema] produced from [tableColumnMetadata].
      */

dataframe-jdbc/src/main/kotlin/org/jetbrains/kotlinx/dataframe/io/readJdbc.kt

@@ -642,8 +642,9 @@ public fun DataFrame.Companion.readAllSqlTables(
     val metaData = connection.metaData
     val determinedDbType = dbType ?: extractDBTypeFromConnection(connection)
 
-    // exclude a system and other tables without data, but it looks like it is supported badly for many databases
-    val tables = metaData.getTables(catalogue, null, null, arrayOf("TABLE"))
+    // exclude system- and other tables without data (it looks like it is supported badly for many databases)
+    val tableTypes = determinedDbType.tableTypes?.toTypedArray()
+    val tables = metaData.getTables(catalogue, null, null, tableTypes)
 
     val dataFrames = mutableMapOf<String, AnyFrame>()
 
@@ -861,8 +862,8 @@ public fun DataFrame.Companion.getSchemaForAllSqlTables(
     val metaData = connection.metaData
     val determinedDbType = dbType ?: extractDBTypeFromConnection(connection)
 
-    val tableTypes = arrayOf("TABLE")
-    // exclude a system and other tables without data
+    // exclude system- and other tables without data
+    val tableTypes = determinedDbType.tableTypes?.toTypedArray()
     val tables = metaData.getTables(null, null, null, tableTypes)
 
     val dataFrameSchemas = mutableMapOf<String, DataFrameSchema>()