/*
* 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.facebook.presto.sql;
import com.facebook.presto.sql.tree.AddColumn;
import com.facebook.presto.sql.tree.AliasedRelation;
import com.facebook.presto.sql.tree.AllColumns;
import com.facebook.presto.sql.tree.AstVisitor;
import com.facebook.presto.sql.tree.Call;
import com.facebook.presto.sql.tree.CallArgument;
import com.facebook.presto.sql.tree.ColumnDefinition;
import com.facebook.presto.sql.tree.Commit;
import com.facebook.presto.sql.tree.CreateSchema;
import com.facebook.presto.sql.tree.CreateTable;
import com.facebook.presto.sql.tree.CreateTableAsSelect;
import com.facebook.presto.sql.tree.CreateView;
import com.facebook.presto.sql.tree.Deallocate;
import com.facebook.presto.sql.tree.Delete;
import com.facebook.presto.sql.tree.DescribeInput;
import com.facebook.presto.sql.tree.DescribeOutput;
import com.facebook.presto.sql.tree.DropSchema;
import com.facebook.presto.sql.tree.DropTable;
import com.facebook.presto.sql.tree.DropView;
import com.facebook.presto.sql.tree.Except;
import com.facebook.presto.sql.tree.Execute;
import com.facebook.presto.sql.tree.Explain;
import com.facebook.presto.sql.tree.ExplainFormat;
import com.facebook.presto.sql.tree.ExplainOption;
import com.facebook.presto.sql.tree.ExplainType;
import com.facebook.presto.sql.tree.Expression;
import com.facebook.presto.sql.tree.Grant;
import com.facebook.presto.sql.tree.Insert;
import com.facebook.presto.sql.tree.Intersect;
import com.facebook.presto.sql.tree.Isolation;
import com.facebook.presto.sql.tree.Join;
import com.facebook.presto.sql.tree.JoinCriteria;
import com.facebook.presto.sql.tree.JoinOn;
import com.facebook.presto.sql.tree.JoinUsing;
import com.facebook.presto.sql.tree.LikeClause;
import com.facebook.presto.sql.tree.NaturalJoin;
import com.facebook.presto.sql.tree.Node;
import com.facebook.presto.sql.tree.OrderBy;
import com.facebook.presto.sql.tree.Prepare;
import com.facebook.presto.sql.tree.QualifiedName;
import com.facebook.presto.sql.tree.Query;
import com.facebook.presto.sql.tree.QuerySpecification;
import com.facebook.presto.sql.tree.Relation;
import com.facebook.presto.sql.tree.RenameColumn;
import com.facebook.presto.sql.tree.RenameSchema;
import com.facebook.presto.sql.tree.RenameTable;
import com.facebook.presto.sql.tree.ResetSession;
import com.facebook.presto.sql.tree.Revoke;
import com.facebook.presto.sql.tree.Rollback;
import com.facebook.presto.sql.tree.Row;
import com.facebook.presto.sql.tree.SampledRelation;
import com.facebook.presto.sql.tree.Select;
import com.facebook.presto.sql.tree.SelectItem;
import com.facebook.presto.sql.tree.SetSession;
import com.facebook.presto.sql.tree.ShowCatalogs;
import com.facebook.presto.sql.tree.ShowColumns;
import com.facebook.presto.sql.tree.ShowCreate;
import com.facebook.presto.sql.tree.ShowFunctions;
import com.facebook.presto.sql.tree.ShowGrants;
import com.facebook.presto.sql.tree.ShowPartitions;
import com.facebook.presto.sql.tree.ShowSchemas;
import com.facebook.presto.sql.tree.ShowSession;
import com.facebook.presto.sql.tree.ShowTables;
import com.facebook.presto.sql.tree.SingleColumn;
import com.facebook.presto.sql.tree.StartTransaction;
import com.facebook.presto.sql.tree.Table;
import com.facebook.presto.sql.tree.TableSubquery;
import com.facebook.presto.sql.tree.TransactionAccessMode;
import com.facebook.presto.sql.tree.TransactionMode;
import com.facebook.presto.sql.tree.Union;
import com.facebook.presto.sql.tree.Unnest;
import com.facebook.presto.sql.tree.Values;
import com.facebook.presto.sql.tree.With;
import com.facebook.presto.sql.tree.WithQuery;
import com.google.common.base.Joiner;
import com.google.common.base.Strings;
import com.google.common.collect.ImmutableSortedMap;
import java.util.ArrayList;
import java.util.Iterator;
import java.util.List;
import java.util.Map;
import java.util.Optional;
import java.util.regex.Pattern;
import static com.facebook.presto.sql.ExpressionFormatter.formatExpression;
import static com.facebook.presto.sql.ExpressionFormatter.formatGroupBy;
import static com.facebook.presto.sql.ExpressionFormatter.formatOrderBy;
import static com.facebook.presto.sql.ExpressionFormatter.formatSortItems;
import static com.facebook.presto.sql.ExpressionFormatter.formatStringLiteral;
import static com.google.common.base.Preconditions.checkArgument;
import static com.google.common.collect.Iterables.getOnlyElement;
import static java.util.stream.Collectors.joining;
public final class SqlFormatter
{
private static final String INDENT = " ";
private static final Pattern NAME_PATTERN = Pattern.compile("[a-z_][a-z0-9_]*");
private SqlFormatter() {}
public static String formatSql(Node root, Optional<List<Expression>> parameters)
{
StringBuilder builder = new StringBuilder();
new Formatter(builder, parameters).process(root, 0);
return builder.toString();
}
private static class Formatter
extends AstVisitor<Void, Integer>
{
private final StringBuilder builder;
private final Optional<List<Expression>> parameters;
public Formatter(StringBuilder builder, Optional<List<Expression>> parameters)
{
this.builder = builder;
this.parameters = parameters;
}
@Override
protected Void visitNode(Node node, Integer indent)
{
throw new UnsupportedOperationException("not yet implemented: " + node);
}
@Override
protected Void visitExpression(Expression node, Integer indent)
{
checkArgument(indent == 0, "visitExpression should only be called at root");
builder.append(formatExpression(node, parameters));
return null;
}
@Override
protected Void visitUnnest(Unnest node, Integer indent)
{
builder.append(node.toString());
return null;
}
@Override
protected Void visitPrepare(Prepare node, Integer indent)
{
append(indent, "PREPARE ");
builder.append(node.getName());
builder.append(" FROM");
builder.append("\n");
process(node.getStatement(), indent + 1);
return null;
}
@Override
protected Void visitDeallocate(Deallocate node, Integer indent)
{
append(indent, "DEALLOCATE PREPARE ");
builder.append(node.getName());
return null;
}
@Override
protected Void visitExecute(Execute node, Integer indent)
{
append(indent, "EXECUTE ");
builder.append(node.getName());
List<Expression> parameters = node.getParameters();
if (!parameters.isEmpty()) {
builder.append(" USING ");
Joiner.on(", ").appendTo(builder, parameters);
}
return null;
}
@Override
protected Void visitDescribeOutput(DescribeOutput node, Integer indent)
{
append(indent, "DESCRIBE OUTPUT ");
builder.append(node.getName());
return null;
}
@Override
protected Void visitDescribeInput(DescribeInput node, Integer indent)
{
append(indent, "DESCRIBE INPUT ");
builder.append(node.getName());
return null;
}
@Override
protected Void visitQuery(Query node, Integer indent)
{
if (node.getWith().isPresent()) {
With with = node.getWith().get();
append(indent, "WITH");
if (with.isRecursive()) {
builder.append(" RECURSIVE");
}
builder.append("\n ");
Iterator<WithQuery> queries = with.getQueries().iterator();
while (queries.hasNext()) {
WithQuery query = queries.next();
append(indent, query.getName());
query.getColumnNames().ifPresent(columnNames -> appendAliasColumns(builder, columnNames));
builder.append(" AS ");
process(new TableSubquery(query.getQuery()), indent);
builder.append('\n');
if (queries.hasNext()) {
builder.append(", ");
}
}
}
processRelation(node.getQueryBody(), indent);
if (node.getOrderBy().isPresent()) {
process(node.getOrderBy().get(), indent);
}
if (node.getLimit().isPresent()) {
append(indent, "LIMIT " + node.getLimit().get())
.append('\n');
}
return null;
}
@Override
protected Void visitQuerySpecification(QuerySpecification node, Integer indent)
{
process(node.getSelect(), indent);
if (node.getFrom().isPresent()) {
append(indent, "FROM");
builder.append('\n');
append(indent, " ");
process(node.getFrom().get(), indent);
}
builder.append('\n');
if (node.getWhere().isPresent()) {
append(indent, "WHERE " + formatExpression(node.getWhere().get(), parameters))
.append('\n');
}
if (node.getGroupBy().isPresent()) {
append(indent, "GROUP BY " + (node.getGroupBy().get().isDistinct() ? " DISTINCT " : "") + formatGroupBy(node.getGroupBy().get().getGroupingElements())).append('\n');
}
if (node.getHaving().isPresent()) {
append(indent, "HAVING " + formatExpression(node.getHaving().get(), parameters))
.append('\n');
}
if (node.getOrderBy().isPresent()) {
process(node.getOrderBy().get(), indent);
}
if (node.getLimit().isPresent()) {
append(indent, "LIMIT " + node.getLimit().get())
.append('\n');
}
return null;
}
@Override
protected Void visitOrderBy(OrderBy node, Integer indent)
{
append(indent, formatOrderBy(node, parameters))
.append('\n');
return null;
}
@Override
protected Void visitSelect(Select node, Integer indent)
{
append(indent, "SELECT");
if (node.isDistinct()) {
builder.append(" DISTINCT");
}
if (node.getSelectItems().size() > 1) {
boolean first = true;
for (SelectItem item : node.getSelectItems()) {
builder.append("\n")
.append(indentString(indent))
.append(first ? " " : ", ");
process(item, indent);
first = false;
}
}
else {
builder.append(' ');
process(getOnlyElement(node.getSelectItems()), indent);
}
builder.append('\n');
return null;
}
@Override
protected Void visitSingleColumn(SingleColumn node, Integer indent)
{
builder.append(formatExpression(node.getExpression(), parameters));
if (node.getAlias().isPresent()) {
builder.append(' ')
.append('"')
.append(node.getAlias().get())
.append('"'); // TODO: handle quoting properly
}
return null;
}
@Override
protected Void visitAllColumns(AllColumns node, Integer context)
{
builder.append(node.toString());
return null;
}
@Override
protected Void visitTable(Table node, Integer indent)
{
builder.append(formatName(node.getName()));
return null;
}
@Override
protected Void visitJoin(Join node, Integer indent)
{
JoinCriteria criteria = node.getCriteria().orElse(null);
String type = node.getType().toString();
if (criteria instanceof NaturalJoin) {
type = "NATURAL " + type;
}
if (node.getType() != Join.Type.IMPLICIT) {
builder.append('(');
}
process(node.getLeft(), indent);
builder.append('\n');
if (node.getType() == Join.Type.IMPLICIT) {
append(indent, ", ");
}
else {
append(indent, type).append(" JOIN ");
}
process(node.getRight(), indent);
if (node.getType() != Join.Type.CROSS && node.getType() != Join.Type.IMPLICIT) {
if (criteria instanceof JoinUsing) {
JoinUsing using = (JoinUsing) criteria;
builder.append(" USING (")
.append(Joiner.on(", ").join(using.getColumns()))
.append(")");
}
else if (criteria instanceof JoinOn) {
JoinOn on = (JoinOn) criteria;
builder.append(" ON ")
.append(formatExpression(on.getExpression(), parameters));
}
else if (!(criteria instanceof NaturalJoin)) {
throw new UnsupportedOperationException("unknown join criteria: " + criteria);
}
}
if (node.getType() != Join.Type.IMPLICIT) {
builder.append(")");
}
return null;
}
@Override
protected Void visitAliasedRelation(AliasedRelation node, Integer indent)
{
process(node.getRelation(), indent);
builder.append(' ')
.append(formatName(node.getAlias()));
appendAliasColumns(builder, node.getColumnNames());
return null;
}
@Override
protected Void visitSampledRelation(SampledRelation node, Integer indent)
{
process(node.getRelation(), indent);
builder.append(" TABLESAMPLE ")
.append(node.getType())
.append(" (")
.append(node.getSamplePercentage())
.append(')');
return null;
}
@Override
protected Void visitValues(Values node, Integer indent)
{
builder.append(" VALUES ");
boolean first = true;
for (Expression row : node.getRows()) {
builder.append("\n")
.append(indentString(indent))
.append(first ? " " : ", ");
builder.append(formatExpression(row, parameters));
first = false;
}
builder.append('\n');
return null;
}
@Override
protected Void visitTableSubquery(TableSubquery node, Integer indent)
{
builder.append('(')
.append('\n');
process(node.getQuery(), indent + 1);
append(indent, ") ");
return null;
}
@Override
protected Void visitUnion(Union node, Integer indent)
{
Iterator<Relation> relations = node.getRelations().iterator();
while (relations.hasNext()) {
processRelation(relations.next(), indent);
if (relations.hasNext()) {
builder.append("UNION ");
if (!node.isDistinct()) {
builder.append("ALL ");
}
}
}
return null;
}
@Override
protected Void visitExcept(Except node, Integer indent)
{
processRelation(node.getLeft(), indent);
builder.append("EXCEPT ");
if (!node.isDistinct()) {
builder.append("ALL ");
}
processRelation(node.getRight(), indent);
return null;
}
@Override
protected Void visitIntersect(Intersect node, Integer indent)
{
Iterator<Relation> relations = node.getRelations().iterator();
while (relations.hasNext()) {
processRelation(relations.next(), indent);
if (relations.hasNext()) {
builder.append("INTERSECT ");
if (!node.isDistinct()) {
builder.append("ALL ");
}
}
}
return null;
}
@Override
protected Void visitCreateView(CreateView node, Integer indent)
{
builder.append("CREATE ");
if (node.isReplace()) {
builder.append("OR REPLACE ");
}
builder.append("VIEW ")
.append(formatName(node.getName()))
.append(" AS\n");
process(node.getQuery(), indent);
return null;
}
@Override
protected Void visitDropView(DropView node, Integer context)
{
builder.append("DROP VIEW ");
if (node.isExists()) {
builder.append("IF EXISTS ");
}
builder.append(node.getName());
return null;
}
@Override
protected Void visitExplain(Explain node, Integer indent)
{
builder.append("EXPLAIN ");
if (node.isAnalyze()) {
builder.append("ANALYZE ");
}
List<String> options = new ArrayList<>();
for (ExplainOption option : node.getOptions()) {
if (option instanceof ExplainType) {
options.add("TYPE " + ((ExplainType) option).getType());
}
else if (option instanceof ExplainFormat) {
options.add("FORMAT " + ((ExplainFormat) option).getType());
}
else {
throw new UnsupportedOperationException("unhandled explain option: " + option);
}
}
if (!options.isEmpty()) {
builder.append("(");
Joiner.on(", ").appendTo(builder, options);
builder.append(")");
}
builder.append("\n");
process(node.getStatement(), indent);
return null;
}
@Override
protected Void visitShowCatalogs(ShowCatalogs node, Integer context)
{
builder.append("SHOW CATALOGS");
node.getLikePattern().ifPresent((value) ->
builder.append(" LIKE ")
.append(formatStringLiteral(value)));
return null;
}
@Override
protected Void visitShowSchemas(ShowSchemas node, Integer context)
{
builder.append("SHOW SCHEMAS");
if (node.getCatalog().isPresent()) {
builder.append(" FROM ")
.append(node.getCatalog().get());
}
node.getLikePattern().ifPresent((value) ->
builder.append(" LIKE ")
.append(formatStringLiteral(value)));
return null;
}
@Override
protected Void visitShowTables(ShowTables node, Integer context)
{
builder.append("SHOW TABLES");
node.getSchema().ifPresent(value ->
builder.append(" FROM ")
.append(formatName(value)));
node.getLikePattern().ifPresent(value ->
builder.append(" LIKE ")
.append(formatStringLiteral(value)));
return null;
}
@Override
protected Void visitShowCreate(ShowCreate node, Integer context)
{
if (node.getType() == ShowCreate.Type.TABLE) {
builder.append("SHOW CREATE TABLE ")
.append(formatName(node.getName()));
}
else if (node.getType() == ShowCreate.Type.VIEW) {
builder.append("SHOW CREATE VIEW ")
.append(formatName(node.getName()));
}
return null;
}
@Override
protected Void visitShowColumns(ShowColumns node, Integer context)
{
builder.append("SHOW COLUMNS FROM ")
.append(formatName(node.getTable()));
return null;
}
@Override
protected Void visitShowPartitions(ShowPartitions node, Integer context)
{
builder.append("SHOW PARTITIONS FROM ")
.append(formatName(node.getTable()));
if (node.getWhere().isPresent()) {
builder.append(" WHERE ")
.append(formatExpression(node.getWhere().get(), parameters));
}
if (!node.getOrderBy().isEmpty()) {
builder.append(" ORDER BY ")
.append(formatSortItems(node.getOrderBy(), parameters));
}
if (node.getLimit().isPresent()) {
builder.append(" LIMIT ")
.append(node.getLimit().get());
}
return null;
}
@Override
protected Void visitShowFunctions(ShowFunctions node, Integer context)
{
builder.append("SHOW FUNCTIONS");
return null;
}
@Override
protected Void visitShowSession(ShowSession node, Integer context)
{
builder.append("SHOW SESSION");
return null;
}
@Override
protected Void visitDelete(Delete node, Integer context)
{
builder.append("DELETE FROM ")
.append(formatName(node.getTable().getName()));
if (node.getWhere().isPresent()) {
builder.append(" WHERE ")
.append(formatExpression(node.getWhere().get(), parameters));
}
return null;
}
@Override
protected Void visitCreateSchema(CreateSchema node, Integer context)
{
builder.append("CREATE SCHEMA ");
if (node.isNotExists()) {
builder.append("IF NOT EXISTS ");
}
builder.append(formatName(node.getSchemaName()));
appendTableProperties(builder, node.getProperties());
return null;
}
@Override
protected Void visitDropSchema(DropSchema node, Integer context)
{
builder.append("DROP SCHEMA ");
if (node.isExists()) {
builder.append("IF EXISTS ");
}
builder.append(formatName(node.getSchemaName()))
.append(" ")
.append(node.isCascade() ? "CASCADE" : "RESTRICT");
return null;
}
@Override
protected Void visitRenameSchema(RenameSchema node, Integer context)
{
builder.append("ALTER SCHEMA ")
.append(formatName(node.getSource()))
.append(" RENAME TO ")
.append(formatName(node.getTarget()));
return null;
}
@Override
protected Void visitCreateTableAsSelect(CreateTableAsSelect node, Integer indent)
{
builder.append("CREATE TABLE ");
if (node.isNotExists()) {
builder.append("IF NOT EXISTS ");
}
builder.append(formatName(node.getName()));
if (node.getComment().isPresent()) {
builder.append("\nCOMMENT " + formatStringLiteral(node.getComment().get()));
}
appendTableProperties(builder, node.getProperties());
builder.append(" AS ");
process(node.getQuery(), indent);
if (!node.isWithData()) {
builder.append(" WITH NO DATA");
}
return null;
}
@Override
protected Void visitCreateTable(CreateTable node, Integer indent)
{
builder.append("CREATE TABLE ");
if (node.isNotExists()) {
builder.append("IF NOT EXISTS ");
}
String tableName = formatName(node.getName());
builder.append(tableName).append(" (\n");
String elementIndent = indentString(indent + 1);
String columnList = node.getElements().stream()
.map(element -> {
if (element instanceof ColumnDefinition) {
ColumnDefinition column = (ColumnDefinition) element;
return elementIndent + formatName(column.getName()) + " " + column.getType() +
column.getComment()
.map(comment -> " COMMENT " + formatStringLiteral(comment))
.orElse("");
}
if (element instanceof LikeClause) {
LikeClause likeClause = (LikeClause) element;
StringBuilder builder = new StringBuilder(elementIndent);
builder.append("LIKE ")
.append(formatName(likeClause.getTableName()));
if (likeClause.getPropertiesOption().isPresent()) {
builder.append(" ")
.append(likeClause.getPropertiesOption().get().name())
.append(" PROPERTIES");
}
return builder.toString();
}
throw new UnsupportedOperationException("unknown table element: " + element);
})
.collect(joining(",\n"));
builder.append(columnList);
builder.append("\n").append(")");
if (node.getComment().isPresent()) {
builder.append("\nCOMMENT " + formatStringLiteral(node.getComment().get()));
}
appendTableProperties(builder, node.getProperties());
return null;
}
private void appendTableProperties(StringBuilder builder, Map<String, Expression> properties)
{
if (!properties.isEmpty()) {
builder.append("\nWITH (\n");
// Always output the table properties in sorted order
String propertyList = ImmutableSortedMap.copyOf(properties).entrySet().stream()
.map(entry -> INDENT + formatName(entry.getKey()) + " = " + formatExpression(entry.getValue(), parameters))
.collect(joining(",\n"));
builder.append(propertyList);
builder.append("\n").append(")");
}
}
private static String formatName(String name)
{
if (NAME_PATTERN.matcher(name).matches()) {
return name;
}
return "\"" + name + "\"";
}
private static String formatName(QualifiedName name)
{
return name.getOriginalParts().stream()
.map(Formatter::formatName)
.collect(joining("."));
}
@Override
protected Void visitDropTable(DropTable node, Integer context)
{
builder.append("DROP TABLE ");
if (node.isExists()) {
builder.append("IF EXISTS ");
}
builder.append(node.getTableName());
return null;
}
@Override
protected Void visitRenameTable(RenameTable node, Integer context)
{
builder.append("ALTER TABLE ")
.append(node.getSource())
.append(" RENAME TO ")
.append(node.getTarget());
return null;
}
@Override
protected Void visitRenameColumn(RenameColumn node, Integer context)
{
builder.append("ALTER TABLE ")
.append(node.getTable())
.append(" RENAME COLUMN ")
.append(node.getSource())
.append(" TO ")
.append(node.getTarget());
return null;
}
@Override
protected Void visitAddColumn(AddColumn node, Integer indent)
{
builder.append("ALTER TABLE ")
.append(node.getName())
.append(" ADD COLUMN ")
.append(node.getColumn().getName())
.append(" ")
.append(node.getColumn().getType());
return null;
}
@Override
protected Void visitInsert(Insert node, Integer indent)
{
builder.append("INSERT INTO ")
.append(node.getTarget())
.append(" ");
if (node.getColumns().isPresent()) {
builder.append("(")
.append(Joiner.on(", ").join(node.getColumns().get()))
.append(") ");
}
process(node.getQuery(), indent);
return null;
}
@Override
public Void visitSetSession(SetSession node, Integer context)
{
builder.append("SET SESSION ")
.append(node.getName())
.append(" = ")
.append(formatExpression(node.getValue(), parameters));
return null;
}
@Override
public Void visitResetSession(ResetSession node, Integer context)
{
builder.append("RESET SESSION ")
.append(node.getName());
return null;
}
@Override
protected Void visitCallArgument(CallArgument node, Integer indent)
{
if (node.getName().isPresent()) {
builder.append(node.getName().get())
.append(" => ");
}
builder.append(formatExpression(node.getValue(), parameters));
return null;
}
@Override
protected Void visitCall(Call node, Integer indent)
{
builder.append("CALL ")
.append(node.getName())
.append("(");
Iterator<CallArgument> arguments = node.getArguments().iterator();
while (arguments.hasNext()) {
process(arguments.next(), indent);
if (arguments.hasNext()) {
builder.append(", ");
}
}
builder.append(")");
return null;
}
@Override
protected Void visitRow(Row node, Integer indent)
{
builder.append("ROW(");
boolean firstItem = true;
for (Expression item : node.getItems()) {
if (!firstItem) {
builder.append(", ");
}
process(item, indent);
firstItem = false;
}
builder.append(")");
return null;
}
@Override
protected Void visitStartTransaction(StartTransaction node, Integer indent)
{
builder.append("START TRANSACTION");
Iterator<TransactionMode> iterator = node.getTransactionModes().iterator();
while (iterator.hasNext()) {
builder.append(" ");
process(iterator.next(), indent);
if (iterator.hasNext()) {
builder.append(",");
}
}
return null;
}
@Override
protected Void visitIsolationLevel(Isolation node, Integer indent)
{
builder.append("ISOLATION LEVEL ").append(node.getLevel().getText());
return null;
}
@Override
protected Void visitTransactionAccessMode(TransactionAccessMode node, Integer context)
{
builder.append(node.isReadOnly() ? "READ ONLY" : "READ WRITE");
return null;
}
@Override
protected Void visitCommit(Commit node, Integer context)
{
builder.append("COMMIT");
return null;
}
@Override
protected Void visitRollback(Rollback node, Integer context)
{
builder.append("ROLLBACK");
return null;
}
@Override
public Void visitGrant(Grant node, Integer indent)
{
builder.append("GRANT ");
if (node.getPrivileges().isPresent()) {
builder.append(node.getPrivileges().get().stream()
.collect(joining(", ")));
}
else {
builder.append("ALL PRIVILEGES");
}
builder.append(" ON ");
if (node.isTable()) {
builder.append("TABLE ");
}
builder.append(node.getTableName())
.append(" TO ")
.append(node.getGrantee());
if (node.isWithGrantOption()) {
builder.append(" WITH GRANT OPTION");
}
return null;
}
@Override
public Void visitRevoke(Revoke node, Integer indent)
{
builder.append("REVOKE ");
if (node.isGrantOptionFor()) {
builder.append("GRANT OPTION FOR ");
}
if (node.getPrivileges().isPresent()) {
builder.append(node.getPrivileges().get().stream()
.collect(joining(", ")));
}
else {
builder.append("ALL PRIVILEGES");
}
builder.append(" ON ");
if (node.isTable()) {
builder.append("TABLE ");
}
builder.append(node.getTableName())
.append(" FROM ")
.append(node.getGrantee());
return null;
}
@Override
public Void visitShowGrants(ShowGrants node, Integer indent)
{
builder.append("SHOW GRANTS ");
if (node.getTableName().isPresent()) {
builder.append("ON ");
if (node.getTable()) {
builder.append("TABLE ");
}
builder.append(node.getTableName().get());
}
return null;
}
private void processRelation(Relation relation, Integer indent)
{
// TODO: handle this properly
if (relation instanceof Table) {
builder.append("TABLE ")
.append(((Table) relation).getName())
.append('\n');
}
else {
process(relation, indent);
}
}
private StringBuilder append(int indent, String value)
{
return builder.append(indentString(indent))
.append(value);
}
private static String indentString(int indent)
{
return Strings.repeat(INDENT, indent);
}
}
private static void appendAliasColumns(StringBuilder builder, List<String> columns)
{
if ((columns != null) && (!columns.isEmpty())) {
builder.append(" (");
Joiner.on(", ").appendTo(builder, columns);
builder.append(')');
}
}
}