diff options
Diffstat (limited to 'src/main/java/com/iciql/SQLDialectHSQL.java')
| -rw-r--r-- | src/main/java/com/iciql/SQLDialectHSQL.java | 149 |
1 files changed, 149 insertions, 0 deletions
diff --git a/src/main/java/com/iciql/SQLDialectHSQL.java b/src/main/java/com/iciql/SQLDialectHSQL.java new file mode 100644 index 0000000..82e6833 --- /dev/null +++ b/src/main/java/com/iciql/SQLDialectHSQL.java @@ -0,0 +1,149 @@ +/*
+ * Copyright 2011 James Moger.
+ *
+ * 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 com.iciql;
+
+import java.text.MessageFormat;
+
+import com.iciql.TableDefinition.FieldDefinition;
+import com.iciql.util.StatementBuilder;
+
+/**
+ * HyperSQL database dialect.
+ */
+public class SQLDialectHSQL extends SQLDialectDefault {
+
+ /**
+ * CACHED tables are created by default. MEMORY tables are created upon
+ * request.
+ */
+ @Override
+ protected <T> String prepareCreateTable(TableDefinition<T> def) {
+ if (def.memoryTable) {
+ return "CREATE MEMORY TABLE IF NOT EXISTS";
+ } else {
+ return "CREATE CACHED TABLE IF NOT EXISTS";
+ }
+ }
+
+ @Override
+ public <T> void prepareDropView(SQLStatement stat, TableDefinition<T> def) {
+ StatementBuilder buff = new StatementBuilder("DROP VIEW IF EXISTS "
+ + prepareTableName(def.schemaName, def.tableName));
+ stat.setSQL(buff.toString());
+ return;
+ }
+
+ @Override
+ protected boolean prepareColumnDefinition(StatementBuilder buff, String dataType,
+ boolean isAutoIncrement, boolean isPrimaryKey) {
+ boolean isIdentity = false;
+ String convertedType = convertSqlType(dataType);
+ buff.append(convertedType);
+ if (isIntegerType(dataType) && isAutoIncrement && isPrimaryKey) {
+ buff.append(" IDENTITY");
+ isIdentity = true;
+ }
+ return isIdentity;
+ }
+
+ @Override
+ public <T> void prepareMerge(SQLStatement stat, String schemaName, String tableName,
+ TableDefinition<T> def, Object obj) {
+ final String valuePrefix = "v";
+ StatementBuilder buff = new StatementBuilder("MERGE INTO ");
+ buff.append(prepareTableName(schemaName, tableName));
+ // a, b, c....
+ buff.append(" USING (VALUES(");
+ for (FieldDefinition field : def.fields) {
+ buff.appendExceptFirst(", ");
+ buff.append("CAST(? AS ");
+ String dataType = convertSqlType(field.dataType);
+ buff.append(dataType);
+ if ("VARCHAR".equals(dataType)) {
+ if (field.length > 0) {
+ // VARCHAR(x)
+ buff.append(MessageFormat.format("({0})", field.length));
+ }
+ } else if ("DECIMAL".equals(dataType)) {
+ if (field.length > 0) {
+ if (field.scale > 0) {
+ // DECIMAL(x,y)
+ buff.append(MessageFormat.format("({0},{1})", field.length, field.scale));
+ } else {
+ // DECIMAL(x)
+ buff.append(MessageFormat.format("({0})", field.length));
+ }
+ }
+ }
+ buff.append(')');
+ Object value = def.getValue(obj, field);
+ stat.addParameter(value);
+ }
+
+ // map to temporary table
+ buff.resetCount();
+ buff.append(")) AS vals (");
+ for (FieldDefinition field : def.fields) {
+ buff.appendExceptFirst(", ");
+ buff.append(prepareColumnName(valuePrefix + field.columnName));
+ }
+
+ buff.append(") ON ");
+
+ // create the ON condition
+ // (va, vb) = (va,vb)
+ String[] prefixes = { "", valuePrefix };
+ for (int i = 0; i < prefixes.length; i++) {
+ String prefix = prefixes[i];
+ buff.resetCount();
+ buff.append('(');
+ for (FieldDefinition field : def.fields) {
+ if (field.isPrimaryKey) {
+ buff.appendExceptFirst(", ");
+ buff.append(prepareColumnName(prefix + field.columnName));
+ }
+ }
+ buff.append(")");
+ if (i == 0) {
+ buff.append('=');
+ }
+ }
+
+ // UPDATE
+ // set a=va
+ buff.append(" WHEN MATCHED THEN UPDATE SET ");
+ buff.resetCount();
+ for (FieldDefinition field : def.fields) {
+ buff.appendExceptFirst(", ");
+ buff.append(prepareColumnName(field.columnName));
+ buff.append('=');
+ buff.append(prepareColumnName(valuePrefix + field.columnName));
+ }
+
+ // INSERT
+ // insert va, vb, vc....
+ buff.append(" WHEN NOT MATCHED THEN INSERT ");
+ buff.resetCount();
+ buff.append(" VALUES (");
+ for (FieldDefinition field : def.fields) {
+ buff.appendExceptFirst(", ");
+ buff.append(prepareColumnName(valuePrefix + field.columnName));
+ }
+ buff.append(')');
+ stat.setSQL(buff.toString());
+ }
+}
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