#1653 - ENH: Add support for ClickHouse database

With array type conversion etc
This commit is contained in:
rob bygrave
2019-03-14 14:44:30 +13:00
parent aef512a851
commit 01f2881940
11 changed files with 243 additions and 126 deletions
@@ -34,12 +34,19 @@ public class ClickHousePlatform extends DatabasePlatform {
dbTypeMap.put(DbType.SMALLINT, new DbPlatformType("UInt16", false));
dbTypeMap.put(DbType.INTEGER, new DbPlatformType("UInt32", false));
dbTypeMap.put(DbType.BIGINT, new DbPlatformType("UInt64", false));
dbTypeMap.put(DbType.DECIMAL, new DbPlatformType("Decimal", 38));
dbTypeMap.put(DbType.DECIMAL, new DbPlatformType("Decimal", 16,4));
dbTypeMap.put(DbType.DOUBLE, new DbPlatformType("Float64", false));
dbTypeMap.put(DbType.VARCHAR, new DbPlatformType("String", false));
dbTypeMap.put(DbType.DATE, new DbPlatformType("Date", false));
dbTypeMap.put(DbType.TIMESTAMP, new DbPlatformType("DateTime", false));
dbTypeMap.put(DbType.VARCHAR, new DbPlatformType("String", false));
dbTypeMap.put(DbType.LONGVARCHAR, new DbPlatformType("String", false));
dbTypeMap.put(DbType.CLOB, new DbPlatformType("String", false));
dbTypeMap.put(DbType.JSONVARCHAR, new DbPlatformType("String", false));
dbTypeMap.put(DbType.UUID, new DbPlatformType("UUID", false));
dbTypeMap.put(DbType.INET, new DbPlatformType("String", false));
dbTypeMap.put(DbType.CDIR, new DbPlatformType("String", false));
}
}
@@ -19,6 +19,11 @@ public interface DdlBuffer {
*/
boolean isEmpty();
/**
* Append a statement allowing for null or empty statements.
*/
DdlBuffer appendStatement(String content) throws IOException;
/**
* Append DDL content to the buffer.
*/
@@ -38,6 +38,15 @@ public class BaseDdlBuffer implements DdlBuffer {
return this;
}
@Override
public DdlBuffer appendStatement(String content) throws IOException {
if (content != null && !content.isEmpty()) {
writer.append(content);
endOfStatement();
}
return this;
}
@Override
public DdlBuffer append(String content) throws IOException {
writer.append(content);
@@ -73,7 +82,9 @@ public class BaseDdlBuffer implements DdlBuffer {
*/
@Override
public DdlBuffer end() throws IOException {
writer.append("\n");
if (!isEmpty()) {
writer.append("\n");
}
return this;
}
@@ -37,6 +37,8 @@ import java.util.LinkedHashMap;
import java.util.List;
import java.util.Map;
import static io.ebeaninternal.dbmigration.ddlgeneration.platform.SplitColumns.split;
/**
* Base implementation for 'create table' and 'alter table' statements.
*/
@@ -148,8 +150,7 @@ public class BaseTableDdl implements TableDdl {
buffer.append("-- NOTE: table has @History - special migration may be necessary").newLine();
}
for (String ddlScript : before) {
buffer.append(translate(ddlScript, tableName, columnName, this.defaultValue));
buffer.endOfStatement();
buffer.appendStatement(translate(ddlScript, tableName, columnName, this.defaultValue));
}
}
@@ -159,8 +160,7 @@ public class BaseTableDdl implements TableDdl {
}
// here we run post migration scripts
for (String ddlScript : after) {
buffer.append(translate(ddlScript, tableName, columnName, defaultValue));
buffer.endOfStatement();
buffer.appendStatement(translate(ddlScript, tableName, columnName, defaultValue));
}
if (!after.isEmpty()) {
buffer.end();
@@ -317,12 +317,11 @@ public class BaseTableDdl implements TableDdl {
private void addComments(DdlBuffer apply, CreateTable createTable) throws IOException {
if (!platformDdl.isInlineComments()) {
String tableComment = createTable.getComment();
if (!StringHelper.isNull(tableComment)) {
if (hasValue(tableComment)) {
platformDdl.addTableComment(apply, createTable.getName(), tableComment);
}
List<Column> columns = createTable.getColumn();
for (Column column : columns) {
for (Column column : createTable.getColumn()) {
if (!StringHelper.isNull(column.getComment())) {
platformDdl.addColumnComment(apply, createTable.getName(), column.getName(), column.getComment());
}
@@ -335,10 +334,7 @@ public class BaseTableDdl implements TableDdl {
*/
private void addTableStorageEngine(DdlBuffer apply, CreateTable createTable) throws IOException {
if (platformDdl.isIncludeStorageEngine()) {
String storageEngine = createTable.getStorageEngine();
if (!StringHelper.isNull(storageEngine)) {
platformDdl.tableStorageEngine(apply, storageEngine);
}
platformDdl.tableStorageEngine(apply, createTable.getStorageEngine());
}
}
@@ -371,26 +367,17 @@ public class BaseTableDdl implements TableDdl {
uqName = col.getUnique();
}
String[] columnNames = {col.getName()};
write.apply()
.append(platformDdl.alterTableAddUniqueConstraint(tableName, uqName, columnNames, Boolean.TRUE.equals(col.isNotnull()) ? null : columnNames))
.endOfStatement();
write.dropAllForeignKeys()
.append(platformDdl.dropIndex(uqName, tableName))
.endOfStatement();
write.apply().appendStatement(platformDdl.alterTableAddUniqueConstraint(tableName, uqName, columnNames, Boolean.TRUE.equals(col.isNotnull()) ? null : columnNames));
write.dropAllForeignKeys().appendStatement(platformDdl.dropIndex(uqName, tableName));
}
for (UniqueConstraint constraint : externalCompoundUnique) {
String uqName = constraint.getName();
String[] columnNames = SplitColumns.split(constraint.getColumnNames());
String[] nullableColumns = SplitColumns.split(constraint.getNullableColumns());
write.apply()
.append(platformDdl.alterTableAddUniqueConstraint(tableName, uqName, columnNames, nullableColumns))
.endOfStatement();
String[] columnNames = split(constraint.getColumnNames());
String[] nullableColumns = split(constraint.getNullableColumns());
write.dropAllForeignKeys()
.append(platformDdl.dropIndex(uqName, tableName))
.endOfStatement();
write.apply().appendStatement(platformDdl.alterTableAddUniqueConstraint(tableName, uqName, columnNames, nullableColumns));
write.dropAllForeignKeys().appendStatement(platformDdl.dropIndex(uqName, tableName));
}
}
@@ -407,9 +394,9 @@ public class BaseTableDdl implements TableDdl {
}
String createSeq = platformDdl.createSequence(seqName, initial, allocate);
if (createSeq != null) {
if (hasValue(createSeq)) {
writer.apply().append(createSeq).newLine();
writer.dropAll().append(platformDdl.dropSequence(seqName)).endOfStatement();
writer.dropAll().appendStatement(platformDdl.dropSequence(seqName));
}
}
@@ -438,8 +425,7 @@ public class BaseTableDdl implements TableDdl {
protected void writeInlineCompoundForeignKeys(DdlWrite write, CreateTable createTable) throws IOException {
List<ForeignKey> foreignKey = createTable.getForeignKey();
for (ForeignKey key : foreignKey) {
for (ForeignKey key : createTable.getForeignKey()) {
String fkConstraint = platformDdl.tableInlineForeignKey(new WriteForeignKey(null, key));
write.apply().append(",").newLine().append(" ").append(fkConstraint);
}
@@ -447,12 +433,10 @@ public class BaseTableDdl implements TableDdl {
protected void writeAddForeignKeys(DdlWrite write, CreateTable createTable) throws IOException {
String tableName = createTable.getName();
List<Column> columns = createTable.getColumn();
for (Column column : columns) {
for (Column column : createTable.getColumn()) {
String references = column.getReferences();
if (hasValue(references)) {
writeForeignKey(write, tableName, column);
writeForeignKey(write, createTable.getName(), column);
}
}
@@ -461,11 +445,8 @@ public class BaseTableDdl implements TableDdl {
protected void writeAddCompoundForeignKeys(DdlWrite write, CreateTable createTable) throws IOException {
String tableName = createTable.getName();
List<ForeignKey> foreignKey = createTable.getForeignKey();
for (ForeignKey key : foreignKey) {
writeForeignKey(write, new WriteForeignKey(tableName, key));
for (ForeignKey key : createTable.getForeignKey()) {
writeForeignKey(write, new WriteForeignKey(createTable.getName(), key));
}
}
@@ -479,19 +460,15 @@ public class BaseTableDdl implements TableDdl {
String tableName = lowerTableName(request.table());
if (request.indexName() != null) {
// no matching unique constraint so add the index
fkeyBuffer.append(platformDdl.createIndex(request.indexName(), tableName, request.cols())).endOfStatement();
fkeyBuffer.appendStatement(platformDdl.createIndex(request.indexName(), tableName, request.cols()));
}
alterTableAddForeignKey(fkeyBuffer, request);
fkeyBuffer.end();
write.dropAllForeignKeys()
.append(platformDdl.alterTableDropForeignKey(tableName, request.fkName())).endOfStatement();
if (request.indexName() != null) {
write.dropAllForeignKeys()
.append(platformDdl.dropIndex(request.indexName(), tableName)).endOfStatement();
write.dropAllForeignKeys().appendStatement(platformDdl.alterTableDropForeignKey(tableName, request.fkName()));
if (hasValue(request.indexName())) {
write.dropAllForeignKeys().appendStatement(platformDdl.dropIndex(request.indexName(), tableName));
}
write.dropAllForeignKeys().end();
@@ -499,10 +476,7 @@ public class BaseTableDdl implements TableDdl {
protected void alterTableAddForeignKey(DdlBuffer buffer, WriteForeignKey request) throws IOException {
String fkConstraint = platformDdl.alterTableAddForeignKey(request);
if (fkConstraint != null && !fkConstraint.isEmpty()) {
buffer.append(fkConstraint).endOfStatement();
}
buffer.appendStatement(platformDdl.alterTableAddForeignKey(request));
}
protected void appendColumns(String[] columns, DdlBuffer buffer) throws IOException {
@@ -516,13 +490,12 @@ public class BaseTableDdl implements TableDdl {
buffer.append(")");
}
/**
* Add 'drop table' statement to the buffer.
*/
protected void dropTable(DdlBuffer buffer, String tableName) throws IOException {
buffer.append(platformDdl.dropTable(tableName)).endOfStatement();
buffer.appendStatement(platformDdl.dropTable(tableName));
}
/**
@@ -530,7 +503,7 @@ public class BaseTableDdl implements TableDdl {
*/
protected void dropSequence(DdlBuffer buffer, String sequenceName) throws IOException {
buffer.append(platformDdl.dropSequence(sequenceName)).endOfStatement();
buffer.appendStatement(platformDdl.dropSequence(sequenceName));
}
/**
@@ -538,8 +511,7 @@ public class BaseTableDdl implements TableDdl {
*/
protected void writeCheckConstraints(DdlBuffer apply, CreateTable createTable) throws IOException {
List<Column> columns = createTable.getColumn();
for (Column column : columns) {
for (Column column : createTable.getColumn()) {
String checkConstraint = column.getCheckConstraint();
if (hasValue(checkConstraint)) {
writeCheckConstraint(apply, column, checkConstraint);
@@ -561,12 +533,11 @@ public class BaseTableDdl implements TableDdl {
protected void writeCompoundUniqueConstraints(DdlBuffer apply, CreateTable createTable) throws IOException {
List<UniqueConstraint> uniqueConstraints = createTable.getUniqueConstraint();
boolean inlineUniqueWhenNull = platformDdl.isInlineUniqueWhenNullable();
for (UniqueConstraint uniqueConstraint : uniqueConstraints) {
for (UniqueConstraint uniqueConstraint : createTable.getUniqueConstraint()) {
if (inlineUniqueWhenNull) {
String uqName = uniqueConstraint.getName();
String[] columns = SplitColumns.split(uniqueConstraint.getColumnNames());
String[] columns = split(uniqueConstraint.getColumnNames());
apply.append(",").newLine();
apply.append(" constraint ").append(uqName).append(" unique");
appendColumns(columns, apply);
@@ -663,54 +634,34 @@ public class BaseTableDdl implements TableDdl {
@Override
public void generate(DdlWrite writer, CreateIndex createIndex) throws IOException {
String[] cols = SplitColumns.split(createIndex.getColumns());
writer.apply()
.append(platformDdl.createIndex(createIndex.getIndexName(), createIndex.getTableName(), cols))
.endOfStatement();
writer.dropAll()
.append(platformDdl.dropIndex(createIndex.getIndexName(), createIndex.getTableName()))
.endOfStatement();
writer.apply().appendStatement(platformDdl.createIndex(createIndex.getIndexName(), createIndex.getTableName(), split(createIndex.getColumns())));
writer.dropAll().appendStatement(platformDdl.dropIndex(createIndex.getIndexName(), createIndex.getTableName()));
}
@Override
public void generate(DdlWrite writer, DropIndex dropIndex) throws IOException {
writer.apply()
.append(platformDdl.dropIndex(dropIndex.getIndexName(), dropIndex.getTableName()))
.endOfStatement();
writer.apply().appendStatement(platformDdl.dropIndex(dropIndex.getIndexName(), dropIndex.getTableName()));
}
@Override
public void generate(DdlWrite writer, AddUniqueConstraint constraint) throws IOException {
if (DdlHelp.isDropConstraint(constraint.getColumnNames())) {
String ddl = platformDdl.alterTableDropUniqueConstraint(constraint.getTableName(), constraint.getConstraintName());
if (hasValue(ddl)) {
writer.apply().append(ddl).endOfStatement();
}
writer.apply().appendStatement(platformDdl.alterTableDropUniqueConstraint(constraint.getTableName(), constraint.getConstraintName()));
} else {
String[] cols = SplitColumns.split(constraint.getColumnNames());
String[] nullableColumns = SplitColumns.split(constraint.getNullableColumns());
String ddl = platformDdl.alterTableAddUniqueConstraint(constraint.getTableName(), constraint.getConstraintName(), cols, nullableColumns);
if (hasValue(ddl)) {
writer.apply().append(ddl).endOfStatement();
}
String[] cols = split(constraint.getColumnNames());
String[] nullableColumns = split(constraint.getNullableColumns());
writer.apply().appendStatement(platformDdl.alterTableAddUniqueConstraint(constraint.getTableName(), constraint.getConstraintName(), cols, nullableColumns));
}
}
@Override
public void generate(DdlWrite writer, AlterForeignKey alterForeignKey) throws IOException {
if (DdlHelp.isDropForeignKey(alterForeignKey.getColumnNames())) {
String ddl = platformDdl.alterTableDropForeignKey(alterForeignKey.getTableName(), alterForeignKey.getName());
if (hasValue(ddl)) {
writer.apply().append(ddl).endOfStatement();
}
writer.apply().appendStatement(platformDdl.alterTableDropForeignKey(alterForeignKey.getTableName(), alterForeignKey.getName()));
} else {
String ddl = platformDdl.alterTableAddForeignKey(new WriteForeignKey(alterForeignKey));
if (hasValue(ddl)) {
writer.apply().append(ddl).endOfStatement();
}
writer.apply().appendStatement(platformDdl.alterTableAddForeignKey(new WriteForeignKey(alterForeignKey)));
}
}
@@ -920,7 +871,7 @@ public class BaseTableDdl implements TableDdl {
String ddl = platformDdl.alterColumnBaseAttributes(alter);
if (hasValue(ddl)) {
writer.apply().append(ddl).endOfStatement();
writer.apply().appendStatement(ddl);
if (isTrue(alter.isWithHistory()) && alter.getType() != null && historySupport == HistorySupport.TRIGGER_BASED) {
// mysql and sql server column type change allowing nulls in the history table column
@@ -932,53 +883,41 @@ public class BaseTableDdl implements TableDdl {
String histColumnDdl = platformDdl.alterColumnBaseAttributes(alterHistoryColumn);
// write the apply to history table
writer.apply().append(histColumnDdl).endOfStatement();
writer.apply().appendStatement(histColumnDdl);
}
}
}
protected void alterColumnDefaultValue(DdlWrite writer, AlterColumn alter) throws IOException {
String ddl = platformDdl.alterColumnDefaultValue(alter.getTableName(), alter.getColumnName(), alter.getDefaultValue());
if (hasValue(ddl)) {
writer.apply().append(ddl).endOfStatement();
}
writer.apply().appendStatement(platformDdl.alterColumnDefaultValue(alter.getTableName(), alter.getColumnName(), alter.getDefaultValue()));
}
protected void dropCheckConstraint(DdlWrite writer, AlterColumn alter, String constraintName) throws IOException {
String ddl = platformDdl.alterTableDropConstraint(alter.getTableName(), constraintName);
if (hasValue(ddl)) {
writer.apply().append(ddl).endOfStatement();
}
writer.apply().appendStatement(platformDdl.alterTableDropConstraint(alter.getTableName(), constraintName));
}
protected void addCheckConstraint(DdlWrite writer, AlterColumn alter) throws IOException {
String ddl = platformDdl.alterTableAddCheckConstraint(alter.getTableName(), alter.getCheckConstraintName(), alter.getCheckConstraint());
if (hasValue(ddl)) {
writer.apply().append(ddl).endOfStatement();
}
writer.apply().appendStatement(platformDdl.alterTableAddCheckConstraint(alter.getTableName(), alter.getCheckConstraintName(), alter.getCheckConstraint()));
}
protected void alterColumnNotnull(DdlWrite writer, AlterColumn alter) throws IOException {
String ddl = platformDdl.alterColumnNotnull(alter.getTableName(), alter.getColumnName(), alter.isNotnull());
if (hasValue(ddl)) {
writer.apply().append(ddl).endOfStatement();
}
writer.apply().appendStatement(platformDdl.alterColumnNotnull(alter.getTableName(), alter.getColumnName(), alter.isNotnull()));
}
protected void alterColumnType(DdlWrite writer, AlterColumn alter) throws IOException {
String ddl = platformDdl.alterColumnType(alter.getTableName(), alter.getColumnName(), alter.getType());
if (hasValue(ddl)) {
writer.apply().append(ddl).endOfStatement();
writer.apply().appendStatement(ddl);
if (isTrue(alter.isWithHistory()) && historySupport == HistorySupport.TRIGGER_BASED) {
regenerateHistoryTriggers(alter.getTableName(), HistoryTableUpdate.Change.ALTER, alter.getColumnName());
// apply same type change to matching column in the history table
ddl = platformDdl.alterColumnType(historyTable(alter.getTableName()), alter.getColumnName(), alter.getType());
writer.apply().append(ddl).endOfStatement();
writer.apply().appendStatement(ddl);
}
}
}
@@ -990,17 +929,13 @@ public class BaseTableDdl implements TableDdl {
protected void alterColumnDropForeignKey(DdlWrite writer, AlterColumn alter) throws IOException {
writer.apply()
.append(platformDdl.alterTableDropForeignKey(alter.getTableName(), alter.getDropForeignKey()))
.endOfStatement();
writer.apply().appendStatement(platformDdl.alterTableDropForeignKey(alter.getTableName(), alter.getDropForeignKey()));
}
protected void alterColumnDropUniqueConstraint(DdlWrite writer, AlterColumn alter) throws IOException {
writer.apply()
.append(platformDdl.alterTableDropUniqueConstraint(alter.getTableName(), alter.getDropUnique()))
.endOfStatement();
writer.apply().appendStatement(platformDdl.alterTableDropUniqueConstraint(alter.getTableName(), alter.getDropUnique()));
}
protected void alterColumnAddUniqueOneToOneConstraint(DdlWrite writer, AlterColumn alter) throws IOException {
@@ -1017,13 +952,9 @@ public class BaseTableDdl implements TableDdl {
String[] cols = {alter.getColumnName()};
boolean notNull = alter.isNotnull() != null ? alter.isNotnull() : Boolean.TRUE.equals(alter.isNotnull());
writer.apply()
.append(platformDdl.alterTableAddUniqueConstraint(alter.getTableName(), uqName, cols, notNull ? null : cols))
.endOfStatement();
writer.apply().appendStatement(platformDdl.alterTableAddUniqueConstraint(alter.getTableName(), uqName, cols, notNull ? null : cols));
writer.dropAllForeignKeys()
.append(platformDdl.dropIndex(uqName, alter.getTableName()))
.endOfStatement();
writer.dropAllForeignKeys().appendStatement(platformDdl.dropIndex(uqName, alter.getTableName()));
}
@@ -0,0 +1,33 @@
package io.ebeaninternal.dbmigration.ddlgeneration.platform;
import java.util.HashMap;
import java.util.Map;
/**
* Logical array type to ClickHouse array type conversion.
*/
class ClickHouseDbArray {
private static final Map<String, String> mapping = new HashMap<>();
static {
mapping.put("uuid[]", "Array(UUID)");
mapping.put("varchar[]", "Array(String)");
mapping.put("integer[]", "Array(UInt32)");
mapping.put("bigint[]", "Array(UInt64)");
}
/**
* Covert the 'logical' array type to a native one (for Postgres and Cockroach).
*/
static String logicalToNative(String logicalArrayType) {
int colonPos = logicalArrayType.indexOf(':');
if (colonPos > -1) {
logicalArrayType = logicalArrayType.substring(0, colonPos);
}
String clickHouseType = mapping.get(logicalArrayType);
if (clickHouseType == null) {
throw new IllegalStateException("No mapping for logical array type " + logicalArrayType);
}
return clickHouseType;
}
}
@@ -1,15 +1,30 @@
package io.ebeaninternal.dbmigration.ddlgeneration.platform;
import io.ebean.config.ServerConfig;
import io.ebean.config.dbplatform.DatabasePlatform;
import io.ebeaninternal.dbmigration.ddlgeneration.DdlBuffer;
import io.ebeaninternal.dbmigration.ddlgeneration.DdlHandler;
import java.io.IOException;
public class ClickHouseDdl extends PlatformDdl {
private static final String LOG_TABLE = "ENGINE = Log()";
public ClickHouseDdl(DatabasePlatform platform) {
super(platform);
this.includeStorageEngine = true;
this.identitySuffix = "";
}
@Override
public DdlHandler createDdlHandler(ServerConfig serverConfig) {
return new ClickHouseDdlHandler(serverConfig, this);
}
@Override
protected String convertArrayType(String logicalArrayType) {
return ClickHouseDbArray.logicalToNative(logicalArrayType);
}
/**
@@ -17,9 +32,38 @@ public class ClickHouseDdl extends PlatformDdl {
*/
@Override
public void tableStorageEngine(DdlBuffer apply, String storageEngine) throws IOException {
if (storageEngine == null) {
// default to Log() table but really should all be explicit (need arguments for MergeTree etc)
storageEngine = LOG_TABLE;
}
apply.append(" ").append(storageEngine);
}
@Override
public String alterTableAddForeignKey(WriteForeignKey request) {
return null;
}
@Override
public String alterTableDropForeignKey(String tableName, String fkName) {
return null;
}
@Override
public String tableInlineForeignKey(WriteForeignKey request) {
return null;
}
@Override
public String dropIndex(String indexName, String tableName) {
return null;
}
@Override
public String createIndex(String indexName, String tableName, String[] columns) {
return null;
}
@Override
protected void writeColumnNotNull(DdlBuffer buffer) {
// do nothing
@@ -0,0 +1,11 @@
package io.ebeaninternal.dbmigration.ddlgeneration.platform;
import io.ebean.config.ServerConfig;
import io.ebeaninternal.dbmigration.ddlgeneration.BaseDdlHandler;
public class ClickHouseDdlHandler extends BaseDdlHandler {
public ClickHouseDdlHandler(ServerConfig serverConfig, PlatformDdl platformDdl) {
super(serverConfig, platformDdl, new ClickHouseTableDdl(serverConfig, platformDdl));
}
}
@@ -0,0 +1,34 @@
package io.ebeaninternal.dbmigration.ddlgeneration.platform;
import io.ebean.config.ServerConfig;
import io.ebeaninternal.dbmigration.ddlgeneration.DdlBuffer;
import io.ebeaninternal.dbmigration.migration.CreateTable;
public class ClickHouseTableDdl extends BaseTableDdl {
public ClickHouseTableDdl(ServerConfig serverConfig, PlatformDdl platformDdl) {
super(serverConfig, platformDdl);
}
@Override
protected void writePrimaryKeyConstraint(DdlBuffer buffer, String pkName, String[] pkColumns) {
// do nothing
}
@Override
protected void writeCompoundUniqueConstraints(DdlBuffer apply, CreateTable createTable) {
// do nothing
}
@Override
protected void writeUniqueConstraints(DdlBuffer apply, CreateTable createTable) {
// do nothing
}
@Override
protected void writeCheckConstraints(DdlBuffer apply, CreateTable createTable) {
// do nothing
}
}
@@ -104,7 +104,6 @@ public class MySqlDdl extends PlatformDdl {
}
buffer.append(String.format(" comment '%s'", comment));
}
}
@Override