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[#1112] fix(jdbc): deleteColumn throws exception for table with ifExi…
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…sting = true. (#1200)

### What changes were proposed in this pull request?
When 'ifExisting' is set to true in the 'deleteColumn' function, it will
validate the existence of the specified column. If the column does not
exist, it will throw an exception.


### Why are the changes needed?
Fix: #1112 

### Does this PR introduce _any_ user-facing change?
Users should be aware that when using 'deleteColumn,' it may throw a new
exception, 'IllegalArgumentException.'

### How was this patch tested?
UT

---------

Co-authored-by: Clearvive <[email protected]>
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@Clearvive
Clearvive and Clearvive authored Dec 21, 2023
1 parent 7a34c35 commit 972747e
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Showing 5 changed files with 77 additions and 23 deletions.
9 changes: 7 additions & 2 deletions ...on/src/main/java/com/datastrato/gravitino/catalog/jdbc/operation/JdbcTableOperations.java
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Original file line number Diff line number Diff line change
Expand Up @@ -24,6 +24,7 @@
import java.util.List;
import java.util.Map;
import javax.sql.DataSource;
import org.apache.commons.lang3.StringUtils;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

Expand Down Expand Up @@ -157,8 +158,12 @@ public void alterTable(String databaseName, String tableName, TableChange... cha
throws NoSuchTableException {
LOG.info("Attempting to alter table {} from database {}", tableName, databaseName);
try (Connection connection = getConnection(databaseName)) {
JdbcConnectorUtils.executeUpdate(
connection, generateAlterTableSql(databaseName, tableName, changes));
String sql = generateAlterTableSql(databaseName, tableName, changes);
if (StringUtils.isEmpty(sql)) {
LOG.info("No changes to alter table {} from database {}", tableName, databaseName);
return;
}
JdbcConnectorUtils.executeUpdate(connection, sql);
LOG.info("Alter table {} from database {}", tableName, databaseName);
} catch (final SQLException se) {
throw this.exceptionMapper.toGravitinoException(se);
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24 changes: 22 additions & 2 deletions .../src/main/java/com/datastrato/gravitino/catalog/mysql/operation/MysqlTableOperations.java
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Original file line number Diff line number Diff line change
Expand Up @@ -37,6 +37,7 @@
import org.apache.commons.collections4.CollectionUtils;
import org.apache.commons.collections4.MapUtils;
import org.apache.commons.lang3.ArrayUtils;
import org.apache.commons.lang3.BooleanUtils;
import org.apache.commons.lang3.StringUtils;

/** Table operations for MySQL. */
Expand Down Expand Up @@ -322,7 +323,11 @@ protected String generateAlterTableSql(
updateColumnPositionFieldDefinition(updateColumnPosition, lazyLoadCreateTable));
} else if (change instanceof TableChange.DeleteColumn) {
TableChange.DeleteColumn deleteColumn = (TableChange.DeleteColumn) change;
alterSql.add(deleteColumnFieldDefinition(deleteColumn));
lazyLoadCreateTable = getOrCreateTable(databaseName, tableName, lazyLoadCreateTable);
String deleteColSql = deleteColumnFieldDefinition(deleteColumn, lazyLoadCreateTable);
if (StringUtils.isNotEmpty(deleteColSql)) {
alterSql.add(deleteColSql);
}
} else if (change instanceof TableChange.UpdateColumnNullability) {
lazyLoadCreateTable = getOrCreateTable(databaseName, tableName, lazyLoadCreateTable);
alterSql.add(
Expand Down Expand Up @@ -353,6 +358,9 @@ protected String generateAlterTableSql(
alterSql.add("COMMENT '" + newComment + "'");
}

if (CollectionUtils.isEmpty(alterSql)) {
return "";
}
// Return the generated SQL statement
String result = "ALTER TABLE " + tableName + "\n" + String.join(",\n", alterSql) + ";";
LOG.info("Generated alter table:{} sql: {}", databaseName + "." + tableName, result);
Expand Down Expand Up @@ -496,11 +504,23 @@ private String updateColumnPositionFieldDefinition(
return columnDefinition.toString();
}

private String deleteColumnFieldDefinition(TableChange.DeleteColumn deleteColumn) {
private String deleteColumnFieldDefinition(
TableChange.DeleteColumn deleteColumn, CreateTable lazyLoadCreateTable) {
if (deleteColumn.fieldName().length > 1) {
throw new UnsupportedOperationException("Mysql does not support nested column names.");
}
String col = deleteColumn.fieldName()[0];
boolean colExists =
lazyLoadCreateTable.getColumnDefinitions().stream()
.map(MysqlTableOperations::getColumnName)
.anyMatch(s -> StringUtils.equals(col, s));
if (!colExists) {
if (BooleanUtils.isTrue(deleteColumn.getIfExists())) {
return "";
} else {
throw new IllegalArgumentException("Delete column does not exist: " + col);
}
}
return "DROP COLUMN " + col;
}

Expand Down
26 changes: 23 additions & 3 deletions ...java/com/datastrato/gravitino/catalog/postgresql/operation/PostgreSqlTableOperations.java
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Original file line number Diff line number Diff line change
Expand Up @@ -33,6 +33,7 @@
import org.apache.commons.collections4.CollectionUtils;
import org.apache.commons.collections4.MapUtils;
import org.apache.commons.lang3.ArrayUtils;
import org.apache.commons.lang3.BooleanUtils;
import org.apache.commons.lang3.StringUtils;

/** Table operations for PostgreSQL. */
Expand Down Expand Up @@ -351,8 +352,12 @@ protected String generateAlterTableSql(
} else if (change instanceof TableChange.UpdateColumnPosition) {
throw new IllegalArgumentException("PostgreSQL does not support column position.");
} else if (change instanceof TableChange.DeleteColumn) {
lazyLoadTable = getOrCreateTable(schemaName, tableName, lazyLoadTable);
TableChange.DeleteColumn deleteColumn = (TableChange.DeleteColumn) change;
alterSql.add(deleteColumnFieldDefinition(deleteColumn, tableName));
String deleteColSql = deleteColumnFieldDefinition(deleteColumn, lazyLoadTable);
if (StringUtils.isNotEmpty(deleteColSql)) {
alterSql.add(deleteColSql);
}
} else if (change instanceof TableChange.UpdateColumnNullability) {
alterSql.add(
updateColumnNullabilityDefinition(
Expand All @@ -363,6 +368,11 @@ protected String generateAlterTableSql(
}
}

// If there is no change, return directly
if (alterSql.isEmpty()) {
return "";
}

// Return the generated SQL statement
String result = String.join("\n", alterSql);
LOG.info("Generated alter table:{}.{} sql: {}", schemaName, tableName, result);
Expand Down Expand Up @@ -398,11 +408,21 @@ private String updateCommentDefinition(
}

private String deleteColumnFieldDefinition(
TableChange.DeleteColumn deleteColumn, String tableName) {
TableChange.DeleteColumn deleteColumn, JdbcTable table) {
if (deleteColumn.fieldName().length > 1) {
throw new UnsupportedOperationException("PostgreSQL does not support nested column names.");
}
return "ALTER TABLE " + tableName + " DROP COLUMN " + deleteColumn.fieldName()[0] + ";";
String col = deleteColumn.fieldName()[0];
boolean colExists =
Arrays.stream(table.columns()).anyMatch(s -> StringUtils.equals(col, s.name()));
if (!colExists) {
if (BooleanUtils.isTrue(deleteColumn.getIfExists())) {
return "";
} else {
throw new IllegalArgumentException("Delete column does not exist: " + col);
}
}
return "ALTER TABLE " + table.name() + " DROP COLUMN " + deleteColumn.fieldName()[0] + ";";
}

private String updateColumnTypeFieldDefinition(
Expand Down
21 changes: 13 additions & 8 deletions ...om/datastrato/gravitino/integration/test/catalog/jdbc/mysql/TestMysqlTableOperations.java
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Original file line number Diff line number Diff line change
Expand Up @@ -9,7 +9,6 @@

import com.datastrato.gravitino.catalog.jdbc.JdbcColumn;
import com.datastrato.gravitino.catalog.jdbc.JdbcTable;
import com.datastrato.gravitino.exceptions.GravitinoRuntimeException;
import com.datastrato.gravitino.exceptions.NoSuchTableException;
import com.datastrato.gravitino.integration.test.util.GravitinoITUtils;
import com.datastrato.gravitino.rel.TableChange;
Expand Down Expand Up @@ -138,19 +137,25 @@ public void testOperationTable() {
load = TABLE_OPERATIONS.load(TEST_DB_NAME, newName);
assertionsTableInfo(newName, tableComment, columns, properties, load);

GravitinoRuntimeException gravitinoRuntimeException =
IllegalArgumentException illegalArgumentException =
Assertions.assertThrows(
GravitinoRuntimeException.class,
IllegalArgumentException.class,
() ->
TABLE_OPERATIONS.alterTable(
TEST_DB_NAME,
newName,
TableChange.deleteColumn(new String[] {newColumn.name()}, true)));
TableChange.deleteColumn(new String[] {newColumn.name()}, false)));
Assertions.assertEquals(
"Delete column does not exist: " + newColumn.name(), illegalArgumentException.getMessage());
Assertions.assertDoesNotThrow(
() ->
TABLE_OPERATIONS.alterTable(
TEST_DB_NAME,
newName,
TableChange.deleteColumn(new String[] {newColumn.name()}, true)));

Assertions.assertTrue(
gravitinoRuntimeException
.getMessage()
.contains("Can't DROP 'col_5'; check that column/key exists"));
TABLE_OPERATIONS.alterTable(
TEST_DB_NAME, newName, TableChange.deleteColumn(new String[] {newColumn.name()}, true));
Assertions.assertDoesNotThrow(() -> TABLE_OPERATIONS.purge(TEST_DB_NAME, newName));
Assertions.assertThrows(
NoSuchTableException.class, () -> TABLE_OPERATIONS.purge(TEST_DB_NAME, newName));
Expand Down
20 changes: 12 additions & 8 deletions ...ato/gravitino/integration/test/catalog/jdbc/postgresql/TestPostgreSqlTableOperations.java
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Original file line number Diff line number Diff line change
Expand Up @@ -12,7 +12,6 @@
import com.datastrato.gravitino.catalog.postgresql.converter.PostgreSqlTypeConverter;
import com.datastrato.gravitino.catalog.postgresql.operation.PostgreSqlSchemaOperations;
import com.datastrato.gravitino.catalog.postgresql.operation.PostgreSqlTableOperations;
import com.datastrato.gravitino.exceptions.GravitinoRuntimeException;
import com.datastrato.gravitino.exceptions.NoSuchTableException;
import com.datastrato.gravitino.integration.test.util.GravitinoITUtils;
import com.datastrato.gravitino.rel.TableChange;
Expand Down Expand Up @@ -180,23 +179,28 @@ public void testOperationTable() {
// delete column
TABLE_OPERATIONS.alterTable(
TEST_DB_NAME, newName, TableChange.deleteColumn(new String[] {newColumn.name()}, true));

load = TABLE_OPERATIONS.load(TEST_DB_NAME, newName);
alterColumns.remove(newColumn);
assertionsTableInfo(newName, tableComment, alterColumns, properties, load);

GravitinoRuntimeException gravitinoRuntimeException =
IllegalArgumentException illegalArgumentException =
Assertions.assertThrows(
GravitinoRuntimeException.class,
IllegalArgumentException.class,
() ->
TABLE_OPERATIONS.alterTable(
TEST_DB_NAME,
newName,
TableChange.deleteColumn(new String[] {newColumn.name()}, true)));
TableChange.deleteColumn(new String[] {newColumn.name()}, false)));
Assertions.assertEquals(
"Delete column does not exist: " + newColumn.name(), illegalArgumentException.getMessage());

Assertions.assertTrue(
gravitinoRuntimeException
.getMessage()
.contains("ERROR: column \"col_5\" of relation \"new_table\" does not exist"));
Assertions.assertDoesNotThrow(
() ->
TABLE_OPERATIONS.alterTable(
TEST_DB_NAME,
newName,
TableChange.deleteColumn(new String[] {newColumn.name()}, true)));
Assertions.assertDoesNotThrow(() -> TABLE_OPERATIONS.purge(TEST_DB_NAME, newName));
Assertions.assertThrows(
NoSuchTableException.class, () -> TABLE_OPERATIONS.purge(TEST_DB_NAME, newName));
Expand Down

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