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io.prestosql.sql.SqlFormatter Maven / Gradle / Ivy
/*
* 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 io.prestosql.sql;
import com.google.common.base.Joiner;
import com.google.common.base.Strings;
import io.prestosql.sql.tree.AddColumn;
import io.prestosql.sql.tree.AliasedRelation;
import io.prestosql.sql.tree.AllColumns;
import io.prestosql.sql.tree.Analyze;
import io.prestosql.sql.tree.AstVisitor;
import io.prestosql.sql.tree.Call;
import io.prestosql.sql.tree.CallArgument;
import io.prestosql.sql.tree.ColumnDefinition;
import io.prestosql.sql.tree.Comment;
import io.prestosql.sql.tree.Commit;
import io.prestosql.sql.tree.CreateRole;
import io.prestosql.sql.tree.CreateSchema;
import io.prestosql.sql.tree.CreateTable;
import io.prestosql.sql.tree.CreateTableAsSelect;
import io.prestosql.sql.tree.CreateView;
import io.prestosql.sql.tree.Deallocate;
import io.prestosql.sql.tree.Delete;
import io.prestosql.sql.tree.DescribeInput;
import io.prestosql.sql.tree.DescribeOutput;
import io.prestosql.sql.tree.DropColumn;
import io.prestosql.sql.tree.DropRole;
import io.prestosql.sql.tree.DropSchema;
import io.prestosql.sql.tree.DropTable;
import io.prestosql.sql.tree.DropView;
import io.prestosql.sql.tree.Except;
import io.prestosql.sql.tree.Execute;
import io.prestosql.sql.tree.Explain;
import io.prestosql.sql.tree.ExplainFormat;
import io.prestosql.sql.tree.ExplainOption;
import io.prestosql.sql.tree.ExplainType;
import io.prestosql.sql.tree.Expression;
import io.prestosql.sql.tree.Grant;
import io.prestosql.sql.tree.GrantRoles;
import io.prestosql.sql.tree.GrantorSpecification;
import io.prestosql.sql.tree.Identifier;
import io.prestosql.sql.tree.Insert;
import io.prestosql.sql.tree.Intersect;
import io.prestosql.sql.tree.Isolation;
import io.prestosql.sql.tree.Join;
import io.prestosql.sql.tree.JoinCriteria;
import io.prestosql.sql.tree.JoinOn;
import io.prestosql.sql.tree.JoinUsing;
import io.prestosql.sql.tree.Lateral;
import io.prestosql.sql.tree.LikeClause;
import io.prestosql.sql.tree.NaturalJoin;
import io.prestosql.sql.tree.Node;
import io.prestosql.sql.tree.OrderBy;
import io.prestosql.sql.tree.Prepare;
import io.prestosql.sql.tree.PrincipalSpecification;
import io.prestosql.sql.tree.Property;
import io.prestosql.sql.tree.QualifiedName;
import io.prestosql.sql.tree.Query;
import io.prestosql.sql.tree.QuerySpecification;
import io.prestosql.sql.tree.Relation;
import io.prestosql.sql.tree.RenameColumn;
import io.prestosql.sql.tree.RenameSchema;
import io.prestosql.sql.tree.RenameTable;
import io.prestosql.sql.tree.ResetSession;
import io.prestosql.sql.tree.Revoke;
import io.prestosql.sql.tree.RevokeRoles;
import io.prestosql.sql.tree.Rollback;
import io.prestosql.sql.tree.Row;
import io.prestosql.sql.tree.SampledRelation;
import io.prestosql.sql.tree.Select;
import io.prestosql.sql.tree.SelectItem;
import io.prestosql.sql.tree.SetPath;
import io.prestosql.sql.tree.SetRole;
import io.prestosql.sql.tree.SetSession;
import io.prestosql.sql.tree.ShowCatalogs;
import io.prestosql.sql.tree.ShowColumns;
import io.prestosql.sql.tree.ShowCreate;
import io.prestosql.sql.tree.ShowFunctions;
import io.prestosql.sql.tree.ShowGrants;
import io.prestosql.sql.tree.ShowRoleGrants;
import io.prestosql.sql.tree.ShowRoles;
import io.prestosql.sql.tree.ShowSchemas;
import io.prestosql.sql.tree.ShowSession;
import io.prestosql.sql.tree.ShowStats;
import io.prestosql.sql.tree.ShowTables;
import io.prestosql.sql.tree.SingleColumn;
import io.prestosql.sql.tree.StartTransaction;
import io.prestosql.sql.tree.Table;
import io.prestosql.sql.tree.TableSubquery;
import io.prestosql.sql.tree.TransactionAccessMode;
import io.prestosql.sql.tree.TransactionMode;
import io.prestosql.sql.tree.Union;
import io.prestosql.sql.tree.Unnest;
import io.prestosql.sql.tree.Values;
import io.prestosql.sql.tree.With;
import io.prestosql.sql.tree.WithQuery;
import java.util.ArrayList;
import java.util.Iterator;
import java.util.List;
import java.util.Optional;
import java.util.stream.Collectors;
import static com.google.common.base.Preconditions.checkArgument;
import static com.google.common.collect.Iterables.getOnlyElement;
import static io.prestosql.sql.ExpressionFormatter.formatExpression;
import static io.prestosql.sql.ExpressionFormatter.formatGroupBy;
import static io.prestosql.sql.ExpressionFormatter.formatOrderBy;
import static io.prestosql.sql.ExpressionFormatter.formatStringLiteral;
import static java.lang.String.format;
import static java.util.stream.Collectors.joining;
public final class SqlFormatter
{
private static final String INDENT = " ";
private SqlFormatter() {}
public static String formatSql(Node root, Optional> parameters)
{
StringBuilder builder = new StringBuilder();
new Formatter(builder, parameters).process(root, 0);
return builder.toString();
}
private static class Formatter
extends AstVisitor
{
private final StringBuilder builder;
private final Optional> parameters;
public Formatter(StringBuilder builder, Optional> 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("UNNEST(")
.append(node.getExpressions().stream()
.map(expression -> formatExpression(expression, parameters))
.collect(joining(", ")))
.append(")");
if (node.isWithOrdinality()) {
builder.append(" WITH ORDINALITY");
}
return null;
}
@Override
protected Void visitLateral(Lateral node, Integer indent)
{
append(indent, "LATERAL (");
process(node.getQuery(), indent + 1);
append(indent, ")");
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 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 queries = with.getQueries().iterator();
while (queries.hasNext()) {
WithQuery query = queries.next();
append(indent, formatExpression(query.getName(), parameters));
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(formatExpression(node.getAlias().get(), parameters));
}
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(formatExpression(node.getAlias(), parameters));
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 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 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()));
node.getSecurity().ifPresent(security ->
builder.append(" SECURITY ")
.append(security.toString()));
builder.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 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)));
node.getEscape().ifPresent((value) ->
builder.append(" ESCAPE ")
.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)));
node.getEscape().ifPresent(value ->
builder.append(" ESCAPE ")
.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 visitShowStats(ShowStats node, Integer context)
{
builder.append("SHOW STATS FOR ");
process(node.getRelation(), 0);
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()));
builder.append(formatPropertiesMultiLine(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(formatExpression(node.getTarget(), parameters));
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.getColumnAliases().isPresent()) {
String columnList = node.getColumnAliases().get().stream().map(element -> formatExpression(element, parameters)).collect(joining(", "));
builder.append(format("( %s )", columnList));
}
if (node.getComment().isPresent()) {
builder.append("\nCOMMENT " + formatStringLiteral(node.getComment().get()));
}
builder.append(formatPropertiesMultiLine(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 + formatColumnDefinition(column);
}
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()));
}
builder.append(formatPropertiesMultiLine(node.getProperties()));
return null;
}
private String formatPropertiesMultiLine(List properties)
{
if (properties.isEmpty()) {
return "";
}
String propertyList = properties.stream()
.map(element -> INDENT +
formatExpression(element.getName(), parameters) + " = " +
formatExpression(element.getValue(), parameters))
.collect(joining(",\n"));
return "\nWITH (\n" + propertyList + "\n)";
}
private String formatPropertiesSingleLine(List properties)
{
if (properties.isEmpty()) {
return "";
}
String propertyList = properties.stream()
.map(element -> formatExpression(element.getName(), parameters) + " = " +
formatExpression(element.getValue(), parameters))
.collect(joining(", "));
return " WITH ( " + propertyList + " )";
}
private static String formatName(Identifier name)
{
String delimiter = name.isDelimited() ? "\"" : "";
return delimiter + name.getValue().replace("\"", "\"\"") + delimiter;
}
private static String formatName(QualifiedName name)
{
return name.getOriginalParts().stream()
.map(Formatter::formatName)
.collect(joining("."));
}
private String formatColumnDefinition(ColumnDefinition column)
{
StringBuilder sb = new StringBuilder()
.append(formatExpression(column.getName(), parameters))
.append(" ").append(column.getType());
if (!column.isNullable()) {
sb.append(" NOT NULL");
}
column.getComment().ifPresent(comment ->
sb.append(" COMMENT ").append(formatStringLiteral(comment)));
sb.append(formatPropertiesSingleLine(column.getProperties()));
return sb.toString();
}
private static String formatGrantor(GrantorSpecification grantor)
{
GrantorSpecification.Type type = grantor.getType();
switch (type) {
case CURRENT_ROLE:
case CURRENT_USER:
return type.name();
case PRINCIPAL:
return formatPrincipal(grantor.getPrincipal().get());
default:
throw new IllegalArgumentException("Unsupported principal type: " + type);
}
}
private static String formatPrincipal(PrincipalSpecification principal)
{
PrincipalSpecification.Type type = principal.getType();
switch (type) {
case UNSPECIFIED:
return principal.getName().toString();
case USER:
case ROLE:
return format("%s %s", type.name(), principal.getName().toString());
default:
throw new IllegalArgumentException("Unsupported principal type: " + type);
}
}
@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 visitComment(Comment node, Integer context)
{
String comment = node.getComment().isPresent() ? formatStringLiteral(node.getComment().get()) : "NULL";
if (node.getType() == Comment.Type.TABLE) {
builder.append("COMMENT ON TABLE ")
.append(node.getName())
.append(" IS ")
.append(comment);
}
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 visitDropColumn(DropColumn node, Integer context)
{
builder.append("ALTER TABLE ")
.append(formatName(node.getTable()))
.append(" DROP COLUMN ")
.append(formatExpression(node.getColumn(), parameters));
return null;
}
@Override
protected Void visitAnalyze(Analyze node, Integer context)
{
builder.append("ANALYZE ")
.append(formatName(node.getTableName()));
builder.append(formatPropertiesMultiLine(node.getProperties()));
return null;
}
@Override
protected Void visitAddColumn(AddColumn node, Integer indent)
{
builder.append("ALTER TABLE ")
.append(node.getName())
.append(" ADD COLUMN ")
.append(formatColumnDefinition(node.getColumn()));
return null;
}
@Override
protected Void visitInsert(Insert node, Integer indent)
{
builder.append("INSERT INTO ")
.append(node.getTarget());
if (node.getColumns().isPresent()) {
builder.append(" (")
.append(Joiner.on(", ").join(node.getColumns().get()))
.append(")");
}
builder.append("\n");
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 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 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
protected Void visitCreateRole(CreateRole node, Integer context)
{
builder.append("CREATE ROLE ").append(node.getName());
if (node.getGrantor().isPresent()) {
builder.append(" WITH ADMIN ").append(formatGrantor(node.getGrantor().get()));
}
return null;
}
@Override
protected Void visitDropRole(DropRole node, Integer context)
{
builder.append("DROP ROLE ").append(node.getName());
return null;
}
@Override
protected Void visitGrantRoles(GrantRoles node, Integer context)
{
builder.append("GRANT ");
builder.append(node.getRoles().stream()
.map(Identifier::toString)
.collect(joining(", ")));
builder.append(" TO ");
builder.append(node.getGrantees().stream()
.map(Formatter::formatPrincipal)
.collect(joining(", ")));
if (node.isWithAdminOption()) {
builder.append(" WITH ADMIN OPTION");
}
if (node.getGrantor().isPresent()) {
builder.append(" GRANTED BY ").append(formatGrantor(node.getGrantor().get()));
}
return null;
}
@Override
protected Void visitRevokeRoles(RevokeRoles node, Integer context)
{
builder.append("REVOKE ");
if (node.isAdminOptionFor()) {
builder.append("ADMIN OPTION FOR ");
}
builder.append(node.getRoles().stream()
.map(Identifier::toString)
.collect(joining(", ")));
builder.append(" FROM ");
builder.append(node.getGrantees().stream()
.map(Formatter::formatPrincipal)
.collect(joining(", ")));
if (node.getGrantor().isPresent()) {
builder.append(" GRANTED BY ").append(formatGrantor(node.getGrantor().get()));
}
return null;
}
@Override
protected Void visitSetRole(SetRole node, Integer context)
{
builder.append("SET ROLE ");
SetRole.Type type = node.getType();
switch (type) {
case ALL:
case NONE:
builder.append(type.toString());
break;
case ROLE:
builder.append(node.getRole().get());
break;
default:
throw new IllegalArgumentException("Unsupported type: " + type);
}
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(formatPrincipal(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(formatPrincipal(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;
}
@Override
protected Void visitShowRoles(ShowRoles node, Integer context)
{
builder.append("SHOW ");
if (node.isCurrent()) {
builder.append("CURRENT ");
}
builder.append("ROLES");
if (node.getCatalog().isPresent()) {
builder.append(" FROM ")
.append(node.getCatalog().get());
}
return null;
}
@Override
protected Void visitShowRoleGrants(ShowRoleGrants node, Integer context)
{
builder.append("SHOW ROLE GRANTS");
if (node.getCatalog().isPresent()) {
builder.append(" FROM ")
.append(node.getCatalog().get());
}
return null;
}
@Override
public Void visitSetPath(SetPath node, Integer indent)
{
builder.append("SET PATH ");
builder.append(Joiner.on(", ").join(node.getPathSpecification().getPath()));
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 columns)
{
if ((columns != null) && (!columns.isEmpty())) {
String formattedColumns = columns.stream()
.map(name -> formatExpression(name, Optional.empty()))
.collect(Collectors.joining(", "));
builder.append(" (")
.append(formattedColumns)
.append(')');
}
}
}
