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[#915] Add <T1, T2, ..., T[N]> Table<Record[N]<T1, T2, ..., T[N]>>

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Factory.values(Row[N]<T1, T2, ..., T[N]>...), to create ad-hoc
tables from data - Simulate VALUES() using SELECT .. UNION ALL SELECT ..
where VALUES() is unavailable
This commit is contained in:
Lukas Eder 2013-01-03 23:26:58 +01:00
parent c13f7ce577
commit c9d12d8850
1 changed files with 51 additions and 6 deletions
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57
jOOQ/src/main/java/org/jooq/impl/Values.java
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@ -39,6 +39,7 @@ import org.jooq.BindContext;
import org.jooq.Record;
import org.jooq.RenderContext;
import org.jooq.Row;
import org.jooq.Select;
import org.jooq.Support;
import org.jooq.Table;
import org.jooq.exception.DataAccessException;
@ -82,14 +83,58 @@ class Values<R extends Record> extends AbstractTable<R> {
@Override
public final void toSQL(RenderContext context) {
context.keyword("values");
switch (context.getDialect()) {
String separator = "";
for (Row row : rows) {
context.sql(separator)
.sql(row);
// [#915] Simulate VALUES(..) with SELECT .. UNION ALL SELECT ..
// for those dialects that do not support a VALUES() constructor
case FIREBIRD:
case ORACLE:
case SYBASE: {
Select<Record> selects = null;
separator = ", ";
for (Row row : rows) {
Select<Record> select = create().select(row.getFields());
if (selects == null) {
selects = select;
}
else {
selects = selects.unionAll(select);
}
}
context.formatIndentStart()
.formatNewLine()
.sql(selects)
.formatIndentEnd()
.formatNewLine();
break;
}
// [#915] Native support of VALUES(..)
case CUBRID:
case DERBY:
case H2:
case HSQLDB:
case POSTGRES:
case SQLSERVER:
default: {
context.keyword("values")
.formatIndentLockStart();
boolean firstRow = true;
for (Row row : rows) {
if (!firstRow) {
context.sql(",").formatSeparator();
}
context.sql(row);
firstRow = false;
}
context.formatIndentEnd();
break;
}
}
}