use of org.h2.command.dml.Insert in project ignite by apache.
the class DmlAstUtils method selectForInsertOrMerge.
/**
* Create SELECT on which subsequent INSERT or MERGE will be based.
*
* @param cols Columns to insert values into.
* @param rows Rows to create pseudo-SELECT upon.
* @param subQry Subquery to use rather than rows.
* @return Subquery or pseudo-SELECT to evaluate inserted expressions, or {@code null} no query needs to be run.
*/
public static GridSqlQuery selectForInsertOrMerge(GridSqlColumn[] cols, List<GridSqlElement[]> rows, GridSqlQuery subQry) {
if (!F.isEmpty(rows)) {
assert !F.isEmpty(cols);
GridSqlSelect sel = new GridSqlSelect();
GridSqlFunction from = new GridSqlFunction(GridSqlFunctionType.TABLE);
sel.from(from);
GridSqlArray[] args = new GridSqlArray[cols.length];
boolean noQry = true;
for (int i = 0; i < cols.length; i++) {
GridSqlArray arr = new GridSqlArray(rows.size());
String colName = cols[i].columnName();
GridSqlAlias alias = new GridSqlAlias(colName, arr);
alias.resultType(cols[i].resultType());
from.addChild(alias);
args[i] = arr;
GridSqlColumn newCol = new GridSqlColumn(null, from, null, "TABLE", colName);
newCol.resultType(cols[i].resultType());
sel.addColumn(newCol, true);
}
for (GridSqlElement[] row : rows) {
assert cols.length == row.length;
for (int i = 0; i < row.length; i++) {
GridSqlElement el = row[i];
noQry &= (el instanceof GridSqlConst || el instanceof GridSqlParameter);
args[i].addChild(row[i]);
}
}
if (noQry)
return null;
return sel;
} else {
assert subQry != null;
return subQry;
}
}
use of org.h2.command.dml.Insert in project h2database by h2database.
the class Parser method parseMergeUsing.
private MergeUsing parseMergeUsing(Merge oldCommand, int start) {
MergeUsing command = new MergeUsing(oldCommand);
currentPrepared = command;
if (readIf("(")) {
/* a select query is supplied */
if (isSelect()) {
command.setQuery(parseSelect());
read(")");
}
command.setQueryAlias(readFromAlias(null, Collections.singletonList("ON")));
String[] querySQLOutput = { null };
List<Column> columnTemplateList = TableView.createQueryColumnTemplateList(null, command.getQuery(), querySQLOutput);
TableView temporarySourceTableView = createCTEView(command.getQueryAlias(), querySQLOutput[0], columnTemplateList, false, /* no recursion */
false, /* do not add to session */
false, /* isPersistent */
session);
TableFilter sourceTableFilter = new TableFilter(session, temporarySourceTableView, command.getQueryAlias(), rightsChecked, (Select) command.getQuery(), 0, null);
command.setSourceTableFilter(sourceTableFilter);
} else {
/* Its a table name, simulate a query by building a select query for the table */
List<String> excludeIdentifiers = Collections.singletonList("ON");
TableFilter sourceTableFilter = readSimpleTableFilter(0, excludeIdentifiers);
command.setSourceTableFilter(sourceTableFilter);
StringBuilder buff = new StringBuilder("SELECT * FROM ");
appendTableWithSchemaAndAlias(buff, sourceTableFilter.getTable(), sourceTableFilter.getTableAlias());
Prepared preparedQuery = prepare(session, buff.toString(), null);
command.setQuery((Select) preparedQuery);
}
read("ON");
read("(");
Expression condition = readExpression();
command.setOnCondition(condition);
read(")");
if (readIfAll("WHEN", "MATCHED", "THEN")) {
int startMatched = lastParseIndex;
if (readIf("UPDATE")) {
Update updateCommand = new Update(session);
// currentPrepared = updateCommand;
TableFilter filter = command.getTargetTableFilter();
updateCommand.setTableFilter(filter);
parseUpdateSetClause(updateCommand, filter, startMatched);
command.setUpdateCommand(updateCommand);
}
startMatched = lastParseIndex;
if (readIf("DELETE")) {
Delete deleteCommand = new Delete(session);
TableFilter filter = command.getTargetTableFilter();
deleteCommand.setTableFilter(filter);
parseDeleteGivenTable(deleteCommand, null, startMatched);
command.setDeleteCommand(deleteCommand);
}
}
if (readIfAll("WHEN", "NOT", "MATCHED", "THEN")) {
if (readIf("INSERT")) {
Insert insertCommand = new Insert(session);
insertCommand.setTable(command.getTargetTable());
parseInsertGivenTable(insertCommand, command.getTargetTable());
command.setInsertCommand(insertCommand);
}
}
setSQL(command, "MERGE", start);
// build and prepare the targetMatchQuery ready to test each rows
// existence in the target table (using source row to match)
StringBuilder targetMatchQuerySQL = new StringBuilder("SELECT _ROWID_ FROM ");
appendTableWithSchemaAndAlias(targetMatchQuerySQL, command.getTargetTable(), command.getTargetTableFilter().getTableAlias());
targetMatchQuerySQL.append(" WHERE ").append(command.getOnCondition().getSQL());
command.setTargetMatchQuery((Select) parse(targetMatchQuerySQL.toString()));
return command;
}
use of org.h2.command.dml.Insert in project h2database by h2database.
the class Parser method parsePrepared.
private Prepared parsePrepared() {
int start = lastParseIndex;
Prepared c = null;
String token = currentToken;
if (token.length() == 0) {
c = new NoOperation(session);
} else {
char first = token.charAt(0);
switch(first) {
case '?':
// read the ? as a parameter
readTerm();
// this is an 'out' parameter - set a dummy value
parameters.get(0).setValue(ValueNull.INSTANCE);
read("=");
read("CALL");
c = parseCall();
break;
case '(':
c = parseSelect();
break;
case 'a':
case 'A':
if (readIf("ALTER")) {
c = parseAlter();
} else if (readIf("ANALYZE")) {
c = parseAnalyze();
}
break;
case 'b':
case 'B':
if (readIf("BACKUP")) {
c = parseBackup();
} else if (readIf("BEGIN")) {
c = parseBegin();
}
break;
case 'c':
case 'C':
if (readIf("COMMIT")) {
c = parseCommit();
} else if (readIf("CREATE")) {
c = parseCreate();
} else if (readIf("CALL")) {
c = parseCall();
} else if (readIf("CHECKPOINT")) {
c = parseCheckpoint();
} else if (readIf("COMMENT")) {
c = parseComment();
}
break;
case 'd':
case 'D':
if (readIf("DELETE")) {
c = parseDelete();
} else if (readIf("DROP")) {
c = parseDrop();
} else if (readIf("DECLARE")) {
// support for DECLARE GLOBAL TEMPORARY TABLE...
c = parseCreate();
} else if (readIf("DEALLOCATE")) {
c = parseDeallocate();
}
break;
case 'e':
case 'E':
if (readIf("EXPLAIN")) {
c = parseExplain();
} else if (readIf("EXECUTE")) {
c = parseExecute();
}
break;
case 'f':
case 'F':
if (isToken("FROM")) {
c = parseSelect();
}
break;
case 'g':
case 'G':
if (readIf("GRANT")) {
c = parseGrantRevoke(CommandInterface.GRANT);
}
break;
case 'h':
case 'H':
if (readIf("HELP")) {
c = parseHelp();
}
break;
case 'i':
case 'I':
if (readIf("INSERT")) {
c = parseInsert();
}
break;
case 'm':
case 'M':
if (readIf("MERGE")) {
c = parseMerge();
}
break;
case 'p':
case 'P':
if (readIf("PREPARE")) {
c = parsePrepare();
}
break;
case 'r':
case 'R':
if (readIf("ROLLBACK")) {
c = parseRollback();
} else if (readIf("REVOKE")) {
c = parseGrantRevoke(CommandInterface.REVOKE);
} else if (readIf("RUNSCRIPT")) {
c = parseRunScript();
} else if (readIf("RELEASE")) {
c = parseReleaseSavepoint();
} else if (readIf("REPLACE")) {
c = parseReplace();
}
break;
case 's':
case 'S':
if (isToken("SELECT")) {
c = parseSelect();
} else if (readIf("SET")) {
c = parseSet();
} else if (readIf("SAVEPOINT")) {
c = parseSavepoint();
} else if (readIf("SCRIPT")) {
c = parseScript();
} else if (readIf("SHUTDOWN")) {
c = parseShutdown();
} else if (readIf("SHOW")) {
c = parseShow();
}
break;
case 't':
case 'T':
if (readIf("TRUNCATE")) {
c = parseTruncate();
}
break;
case 'u':
case 'U':
if (readIf("UPDATE")) {
c = parseUpdate();
} else if (readIf("USE")) {
c = parseUse();
}
break;
case 'v':
case 'V':
if (readIf("VALUES")) {
c = parseValues();
}
break;
case 'w':
case 'W':
if (readIf("WITH")) {
c = parseWithStatementOrQuery();
}
break;
case ';':
c = new NoOperation(session);
break;
default:
throw getSyntaxError();
}
if (indexedParameterList != null) {
for (int i = 0, size = indexedParameterList.size(); i < size; i++) {
if (indexedParameterList.get(i) == null) {
indexedParameterList.set(i, new Parameter(i));
}
}
parameters = indexedParameterList;
}
if (readIf("{")) {
do {
int index = (int) readLong() - 1;
if (index < 0 || index >= parameters.size()) {
throw getSyntaxError();
}
Parameter p = parameters.get(index);
if (p == null) {
throw getSyntaxError();
}
read(":");
Expression expr = readExpression();
expr = expr.optimize(session);
p.setValue(expr.getValue(session));
} while (readIf(","));
read("}");
for (Parameter p : parameters) {
p.checkSet();
}
parameters.clear();
}
}
if (c == null) {
throw getSyntaxError();
}
setSQL(c, null, start);
return c;
}
use of org.h2.command.dml.Insert in project h2database by h2database.
the class AlterTableAlterColumn method cloneTableStructure.
private Table cloneTableStructure(Table table, Column[] columns, Database db, String tempName, ArrayList<Column> newColumns) {
for (Column col : columns) {
newColumns.add(col.getClone());
}
if (type == CommandInterface.ALTER_TABLE_DROP_COLUMN) {
for (Column removeCol : columnsToRemove) {
Column foundCol = null;
for (Column newCol : newColumns) {
if (newCol.getName().equals(removeCol.getName())) {
foundCol = newCol;
break;
}
}
if (foundCol == null) {
throw DbException.throwInternalError(removeCol.getCreateSQL());
}
newColumns.remove(foundCol);
}
} else if (type == CommandInterface.ALTER_TABLE_ADD_COLUMN) {
int position;
if (addFirst) {
position = 0;
} else if (addBefore != null) {
position = table.getColumn(addBefore).getColumnId();
} else if (addAfter != null) {
position = table.getColumn(addAfter).getColumnId() + 1;
} else {
position = columns.length;
}
if (columnsToAdd != null) {
for (Column column : columnsToAdd) {
newColumns.add(position++, column);
}
}
} else if (type == CommandInterface.ALTER_TABLE_ALTER_COLUMN_CHANGE_TYPE) {
int position = oldColumn.getColumnId();
newColumns.set(position, newColumn);
}
// create a table object in order to get the SQL statement
// can't just use this table, because most column objects are 'shared'
// with the old table
// still need a new id because using 0 would mean: the new table tries
// to use the rows of the table 0 (the meta table)
int id = db.allocateObjectId();
CreateTableData data = new CreateTableData();
data.tableName = tempName;
data.id = id;
data.columns = newColumns;
data.temporary = table.isTemporary();
data.persistData = table.isPersistData();
data.persistIndexes = table.isPersistIndexes();
data.isHidden = table.isHidden();
data.create = true;
data.session = session;
Table newTable = getSchema().createTable(data);
newTable.setComment(table.getComment());
StringBuilder buff = new StringBuilder();
buff.append(newTable.getCreateSQL());
StringBuilder columnList = new StringBuilder();
for (Column nc : newColumns) {
if (columnList.length() > 0) {
columnList.append(", ");
}
if (type == CommandInterface.ALTER_TABLE_ADD_COLUMN && columnsToAdd != null && columnsToAdd.contains(nc)) {
Expression def = nc.getDefaultExpression();
columnList.append(def == null ? "NULL" : def.getSQL());
} else {
columnList.append(nc.getSQL());
}
}
buff.append(" AS SELECT ");
if (columnList.length() == 0) {
// special case: insert into test select * from
buff.append('*');
} else {
buff.append(columnList);
}
buff.append(" FROM ").append(table.getSQL());
String newTableSQL = buff.toString();
String newTableName = newTable.getName();
Schema newTableSchema = newTable.getSchema();
newTable.removeChildrenAndResources(session);
execute(newTableSQL, true);
newTable = newTableSchema.getTableOrView(session, newTableName);
ArrayList<String> triggers = New.arrayList();
for (DbObject child : table.getChildren()) {
if (child instanceof Sequence) {
continue;
} else if (child instanceof Index) {
Index idx = (Index) child;
if (idx.getIndexType().getBelongsToConstraint()) {
continue;
}
}
String createSQL = child.getCreateSQL();
if (createSQL == null) {
continue;
}
if (child instanceof TableView) {
continue;
} else if (child.getType() == DbObject.TABLE_OR_VIEW) {
DbException.throwInternalError();
}
String quotedName = Parser.quoteIdentifier(tempName + "_" + child.getName());
String sql = null;
if (child instanceof ConstraintReferential) {
ConstraintReferential r = (ConstraintReferential) child;
if (r.getTable() != table) {
sql = r.getCreateSQLForCopy(r.getTable(), newTable, quotedName, false);
}
}
if (sql == null) {
sql = child.getCreateSQLForCopy(newTable, quotedName);
}
if (sql != null) {
if (child instanceof TriggerObject) {
triggers.add(sql);
} else {
execute(sql, true);
}
}
}
table.setModified();
// otherwise the sequence is dropped if the table is dropped
for (Column col : newColumns) {
Sequence seq = col.getSequence();
if (seq != null) {
table.removeSequence(seq);
col.setSequence(null);
}
}
for (String sql : triggers) {
execute(sql, true);
}
return newTable;
}
use of org.h2.command.dml.Insert in project h2database by h2database.
the class Parser method parseInsertGivenTable.
private Insert parseInsertGivenTable(Insert command, Table table) {
Column[] columns = null;
if (readIf("(")) {
if (isSelect()) {
command.setQuery(parseSelect());
read(")");
return command;
}
columns = parseColumnList(table);
command.setColumns(columns);
}
if (readIf("DIRECT")) {
command.setInsertFromSelect(true);
}
if (readIf("SORTED")) {
command.setSortedInsertMode(true);
}
if (readIf("DEFAULT")) {
read("VALUES");
Expression[] expr = {};
command.addRow(expr);
} else if (readIf("VALUES")) {
read("(");
do {
ArrayList<Expression> values = New.arrayList();
if (!readIf(")")) {
do {
if (readIf("DEFAULT")) {
values.add(null);
} else {
values.add(readExpression());
}
} while (readIfMore(false));
}
command.addRow(values.toArray(new Expression[0]));
// the following condition will allow (..),; and (..);
} while (readIf(",") && readIf("("));
} else if (readIf("SET")) {
if (columns != null) {
throw getSyntaxError();
}
ArrayList<Column> columnList = New.arrayList();
ArrayList<Expression> values = New.arrayList();
do {
columnList.add(parseColumn(table));
read("=");
Expression expression;
if (readIf("DEFAULT")) {
expression = ValueExpression.getDefault();
} else {
expression = readExpression();
}
values.add(expression);
} while (readIf(","));
command.setColumns(columnList.toArray(new Column[0]));
command.addRow(values.toArray(new Expression[0]));
} else {
command.setQuery(parseSelect());
}
return null;
}
Aggregations