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ru.yandex.clickhouse.jdbcbridge.core.ColumnDefinition Maven / Gradle / Ivy
/**
* Copyright 2019-2021, Zhichun Wu
*
* 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 ru.yandex.clickhouse.jdbcbridge.core;
import java.util.Collections;
import java.util.Enumeration;
import java.util.LinkedHashMap;
import java.util.List;
import java.util.Map;
import java.util.Objects;
import java.util.TimeZone;
import java.util.Map.Entry;
import io.vertx.core.json.JsonArray;
import io.vertx.core.json.JsonObject;
import static ru.yandex.clickhouse.jdbcbridge.core.DataType.*;
/**
* This class defines a column.
*
* @since 2.0
*/
public class ColumnDefinition {
private static final org.slf4j.Logger log = org.slf4j.LoggerFactory.getLogger(ColumnDefinition.class);
static final boolean DEFAULT_VALUE_SUPPORT = String.valueOf(true)
.equalsIgnoreCase(Utils.getConfiguration("false", "DEFAULT_VALUE", "jdbc-bridge.type.default"));
public static final String DEFAULT_NAME = "unknown";
public static final DataType DEFAULT_TYPE = DataType.Str;
private static final String CONF_NAME = "name";
private static final String CONF_TYPE = "type";
private static final String CONF_VALUE = "value";
private static final String CONF_OPTIONS = "options";
private static final String CONF_NULLABLE = "nullable";
private static final String CONF_LENGTH = "length";
private static final String CONF_PRECISION = "precision";
private static final String CONF_SCALE = "scale";
private static final String CONF_TIMEZONE = "timezone";
private static final String TOKEN_DEFAULT = " DEFAULT ";
private static final String NULLABLE_BEGIN = "Nullable(";
private static final String NULLABLE_END = ")";
private static final String NULL_VALUE = "null";
private final String name;
private final DataType type;
private final boolean nullable;
private final int length;
private final int precision;
private final int scale;
private final TimeZone timezone;
private final boolean hasDefaultValue;
private final Map options = new LinkedHashMap<>();
final TypedParameter value;
// index in the column list
private int index = -1;
static Map parseOptions(Object opts) {
Map options = new LinkedHashMap<>();
if (opts == null) {
return options;
}
if (opts instanceof JsonObject) {
JsonObject obj = (JsonObject) opts;
for (Map.Entry entry : obj) {
Object v = entry.getValue();
if (v == null) {
continue;
}
options.put(entry.getKey(),
v instanceof Number ? ((Number) v).intValue() : Integer.parseInt(String.valueOf(v)));
}
} else if (opts instanceof JsonArray) {
JsonArray arr = (JsonArray) opts;
int index = 0;
for (Object obj : arr) {
if (obj == null) {
continue;
}
final String n;
final int i;
if (obj instanceof JsonObject) {
JsonObject j = (JsonObject) obj;
Object objName = j.getValue(CONF_NAME);
Object objValue = j.getValue(CONF_VALUE);
if (objName == null || objValue == null) {
continue;
}
n = String.valueOf(objName);
i = Integer.parseInt(String.valueOf(objValue));
} else {
n = String.valueOf(obj);
i = index++;
}
options.put(n, i);
}
} else if (opts instanceof Enumeration) {
Enumeration e = (Enumeration) opts;
int index = 0;
while (e.hasMoreElements()) {
Object optName = e.nextElement();
if (optName != null) {
options.put(String.valueOf(optName), index++);
}
}
} else if (opts instanceof Iterable) {
int index = 0;
for (Object o : (Iterable) opts) {
if (o != null) {
options.put(String.valueOf(o), index++);
}
}
} else if (opts.getClass().isArray()) {
int index = 0;
for (Object o : (Object[]) opts) {
if (o != null) {
options.put(String.valueOf(o), index++);
}
}
} else if (opts instanceof Map) {
for (Map.Entry entry : ((Map) opts).entrySet()) {
Object optName = entry.getKey();
Object optValue = entry.getValue();
if (optName == null || optValue == null) {
continue;
}
options.put(String.valueOf(optName), Integer.parseInt(String.valueOf(optValue)));
}
} else {
String optsInStr = String.valueOf(opts);
int index = 0;
if (optsInStr.indexOf('\'') == -1) {
for (String str : Utils.splitByChar(optsInStr, ',')) {
options.put(str, index++);
}
} else {
StringBuilder sb = new StringBuilder();
boolean hasQuote = false;
boolean escaped = false;
for (int i = 0, len = optsInStr.length(); i < len; i++) {
char ch = optsInStr.charAt(i);
if (ch == '\\') {
escaped = !escaped;
continue;
}
if (escaped) {
sb.append(ch);
escaped = false;
continue;
}
if (ch == '\'') {
hasQuote = !hasQuote;
} else if (hasQuote) {
sb.append(ch);
}
if (!hasQuote && sb.length() > 0) {
String optName = sb.toString();
sb.setLength(0);
int startIdx = optsInStr.indexOf('=', i);
int endIdx = optsInStr.indexOf(',', i);
if (endIdx < 0) {
endIdx = len;
}
i = endIdx;
if (endIdx > startIdx) {
options.put(optName, startIdx == -1 ? index++
: Integer.parseInt(optsInStr.substring(startIdx + 1, endIdx).trim()));
}
}
}
}
}
return options;
}
public static ColumnDefinition fromJson(JsonObject json) {
String name = DEFAULT_NAME;
DataType type = DataType.Str;
boolean nullable = DEFAULT_NULLABLE;
int length = DEFAULT_LENGTH;
int precision = DEFAULT_PRECISION;
int scale = DEFAULT_SCALE;
String timezone = null;
String value = null;
Map options = new LinkedHashMap<>();
if (json != null) {
name = json.getString(CONF_NAME, DEFAULT_NAME);
type = DataType.from(json.getString(CONF_TYPE, DEFAULT_TYPE.name()));
nullable = json.getBoolean(CONF_NULLABLE, DEFAULT_NULLABLE);
switch (type) {
case FixedStr:
length = json.getInteger(CONF_LENGTH, DEFAULT_LENGTH);
break;
case DateTime64:
scale = json.getInteger(CONF_SCALE, DEFAULT_DATETIME64_SCALE);
break;
case Decimal:
precision = json.getInteger(CONF_PRECISION, DEFAULT_PRECISION);
case Decimal32:
case Decimal64:
case Decimal128:
case Decimal256:
scale = json.getInteger(CONF_SCALE, DEFAULT_SCALE);
break;
default:
break;
}
timezone = json.getString(CONF_TIMEZONE);
value = json.getString(CONF_VALUE);
options.putAll(parseOptions(json.getValue(CONF_OPTIONS)));
}
return new ColumnDefinition(name, type, nullable, length, precision, scale, timezone, value, options);
}
public static ColumnDefinition fromObject(Object obj) {
final ColumnDefinition column;
if (obj == null) {
column = new ColumnDefinition(DEFAULT_NAME, DataType.Str, true, DEFAULT_LENGTH, DEFAULT_PRECISION,
DEFAULT_SCALE);
} else if (obj instanceof ColumnDefinition) {
column = (ColumnDefinition) obj;
} else if (obj instanceof JsonObject) {
column = fromJson((JsonObject) obj);
} else if (obj instanceof Map) {
Map m = (Map) obj;
if (m.size() > 0) {
Object value = m.get(CONF_NAME);
String name = value == null ? DEFAULT_NAME : String.valueOf(value);
value = m.get(CONF_TYPE);
DataType type = value == null ? DataType.Str : DataType.from(String.valueOf(value));
value = m.get(CONF_NULLABLE);
boolean nullable = value == null ? true : Boolean.valueOf(String.valueOf(value));
value = m.get(CONF_LENGTH);
int length = value == null ? DEFAULT_LENGTH : Integer.parseInt(String.valueOf(value));
value = m.get(CONF_PRECISION);
int precision = value == null ? DEFAULT_PRECISION : Integer.parseInt(String.valueOf(value));
value = m.get(CONF_SCALE);
int scale = value == null ? DEFAULT_SCALE : Integer.parseInt(String.valueOf(value));
value = m.get(CONF_TIMEZONE);
String timezone = value == null ? null : String.valueOf(value);
value = m.get(CONF_VALUE);
column = new ColumnDefinition(name, type, nullable, length, precision, scale, timezone,
value == null ? null : String.valueOf(value), parseOptions(m.get(CONF_OPTIONS)));
} else {
column = new ColumnDefinition(DEFAULT_NAME, DataType.Str, true, DEFAULT_LENGTH, DEFAULT_PRECISION,
DEFAULT_SCALE);
}
} else
{
column = new ColumnDefinition(String.valueOf(obj), DataType.Str, true, DEFAULT_LENGTH, DEFAULT_PRECISION,
DEFAULT_SCALE);
}
return column;
}
// FIXME naive implementation, use ANTLR4 in future release for consistency
// https://github.com/ClickHouse/ClickHouse/pull/11298
public static ColumnDefinition fromString(String columnInfo) {
String name = DEFAULT_NAME;
DataType type = DEFAULT_TYPE;
boolean nullable = DEFAULT_NULLABLE;
int length = DEFAULT_LENGTH;
int precision = -1;
int scale = -1;
String timezone = null;
String value = null;
Map options = new LinkedHashMap<>();
if (columnInfo != null && (columnInfo = columnInfo.trim()).length() > 0) {
char quote = columnInfo.charAt(0);
boolean hasQuote = quote == '`' || quote == '"';
boolean escaped = false;
int lastIndex = columnInfo.length() - 1;
int nameEndIndex = hasQuote ? Math.min(columnInfo.lastIndexOf(quote), lastIndex) : lastIndex;
StringBuilder sb = new StringBuilder(lastIndex + 1);
for (int i = hasQuote ? 1 : 0; i <= lastIndex; i++) {
char ch = columnInfo.charAt(i);
escaped = !escaped && (ch == '\\'
|| (hasQuote && ch == quote && columnInfo.charAt(Math.min(i + 1, lastIndex)) == quote));
if ((hasQuote && !escaped && i == nameEndIndex) || (!hasQuote && Character.isWhitespace(ch))) {
name = sb.toString();
sb.setLength(0);
// type declaration is case-sensitive
String declaredType = columnInfo.substring(Math.min(i + 1, lastIndex)).trim();
String defaultValue = null;
i = columnInfo.length() - 1;
// default value. unlike Nullable etc. default is case-insensitive...
int defaultIndex = Utils.indexOfKeywordIgnoreCase(declaredType, TOKEN_DEFAULT);
if (defaultIndex > 0) {
defaultValue = declaredType.substring(defaultIndex + TOKEN_DEFAULT.length()).trim();
declaredType = declaredType.substring(0, defaultIndex).trim();
if (!defaultValue.isEmpty()) {
value = defaultValue.charAt(0) == '\''
&& defaultValue.charAt(defaultValue.length() - 1) == '\''
? defaultValue.substring(1, defaultValue.length() - 1)
: defaultValue;
if (NULL_VALUE.equalsIgnoreCase(value)) {
value = null;
}
}
}
// nullable
if (declaredType.startsWith(NULLABLE_BEGIN)) {
int suffixIndex = declaredType.lastIndexOf(NULLABLE_END);
if (suffixIndex != -1) {
nullable = true;
declaredType = declaredType.substring(NULLABLE_BEGIN.length(), suffixIndex);
} else {
log.warn("Discard invalid Nullable declaration [{}]", declaredType);
}
} else {
nullable = false;
}
// enum*, datetime* and decimal*
int index = declaredType.indexOf('(');
if (index > 0 && declaredType.charAt(declaredType.length() - 1) == ')') {
String innerExpr = declaredType.substring(index + 1, declaredType.length() - 1);
List arguments = Utils.splitByChar(innerExpr, ',');
type = DataType.from(declaredType.substring(0, index));
int size = arguments.size();
if (size > 0) {
switch (type) {
case Enum:
case Enum8:
case Enum16:
arguments.clear();
options.putAll(parseOptions(innerExpr));
break;
case FixedStr:
length = Integer.parseInt(arguments.remove(0));
break;
case DateTime64:
scale = Integer.parseInt(arguments.remove(0));
case DateTime:
if (arguments.size() > 0) {
String tz = arguments.remove(0).trim();
if (tz.length() > 2 && tz.charAt(0) == '\''
&& tz.charAt(tz.length() - 1) == '\'') {
timezone = tz.substring(1, tz.length() - 1);
}
}
break;
case Decimal:
precision = Integer.parseInt(arguments.remove(0));
case Decimal32:
case Decimal64:
case Decimal128:
case Decimal256:
if (arguments.size() > 0) {
scale = Integer.parseInt(arguments.remove(0));
}
break;
default:
log.warn("Discard unsupported arguments for [{}]: {}", declaredType, arguments);
break;
}
if (arguments.size() > 0) {
log.warn("Discard unsupported arguments for [{}]: {}", declaredType, arguments);
}
} else {
log.warn("Discard empty argument for [{}]", declaredType);
}
} else {
type = DataType.from(declaredType);
}
} else if (name == DEFAULT_NAME) {
if (!hasQuote || (hasQuote && !escaped)) {
sb.append(ch);
}
}
}
if (sb.length() > 0) {
name = sb.toString();
}
}
return new ColumnDefinition(name, type, nullable, length, precision, scale, timezone, value, options);
}
public ColumnDefinition(ColumnDefinition def) {
this.name = Objects.requireNonNull(def).name;
this.type = def.type;
this.nullable = def.nullable;
this.length = def.length;
this.precision = def.precision;
this.scale = def.scale;
this.timezone = def.timezone;
this.hasDefaultValue = def.hasDefaultValue;
this.value = new DefaultValues().getTypedValue(type).merge(def.value.getValue());
this.options.putAll(def.options);
}
public ColumnDefinition(String name, DataType type, boolean nullable, int length, int precision, int scale) {
this(name, type, nullable, length, precision, scale, null, null, null);
}
public ColumnDefinition(String name, DataType type, boolean nullable, int length, int precision, int scale,
String timezone, Object value, Map options) {
this.name = name == null ? DEFAULT_NAME : name;
this.type = type;
this.nullable = nullable;
this.timezone = type == DataType.DateTime || type == DataType.DateTime64
? (timezone == null ? null : TimeZone.getTimeZone(timezone))
: null;
this.hasDefaultValue = DEFAULT_VALUE_SUPPORT && value != null;
this.value = new DefaultValues().getTypedValue(type).merge(value == null ? null : String.valueOf(value));
if (options != null) {
this.options.putAll(options);
}
int recommendedPrecision = DEFAULT_PRECISION;
int recommendedScale = DEFAULT_SCALE;
switch (type) {
case DateTime64:
recommendedPrecision = precision < 0 ? DEFAULT_DATETIME64_PRECISION : precision;
recommendedScale = scale < 0 ? DEFAULT_DATETIME64_SCALE
: (scale > MAX_DATETIME64_SCALE ? MAX_DATETIME64_SCALE : scale);
break;
case Decimal:
recommendedPrecision = DEFAULT_DECIMAL_PRECISON;
recommendedPrecision = precision <= 0 ? recommendedPrecision
: (precision > MAX_PRECISON ? MAX_PRECISON : precision);
recommendedScale = scale < 0 ? DEFAULT_DECIMAL_SCALE
: (scale > recommendedPrecision ? recommendedPrecision : scale);
break;
case Decimal32:
recommendedPrecision = DEFAULT_DECIMAL32_PRECISON;
recommendedScale = DEFAULT_DECIMAL32_SCALE;
break;
case Decimal64:
recommendedPrecision = DEFAULT_DECIMAL64_PRECISON;
recommendedScale = DEFAULT_DECIMAL64_SCALE;
break;
case Decimal128:
recommendedPrecision = DEFAULT_DECIMAL128_PRECISON;
recommendedScale = DEFAULT_DECIMAL128_SCALE;
break;
case Decimal256:
recommendedPrecision = DEFAULT_DECIMAL256_PRECISON;
recommendedScale = DEFAULT_DECIMAL256_SCALE;
break;
default:
recommendedPrecision = precision < 0 ? DEFAULT_PRECISION : precision;
break;
}
this.length = type == FixedStr ? (length <= 0 ? 1 : length) : type.getLength();
this.precision = recommendedPrecision < type.getPrecision() ? recommendedPrecision : type.getPrecision();
this.scale = scale <= 0 ? recommendedScale : (scale > this.precision ? this.precision : scale);
}
public String getName() {
return this.name;
}
public DataType getType() {
return this.type;
}
public boolean isNullable() {
return this.nullable;
}
public int getLength() {
return this.length;
}
public int getPrecision() {
return this.precision;
}
public int getScale() {
return this.scale;
}
public TimeZone getTimeZone() {
return this.timezone;
}
public Object getValue() {
return this.value.getValue();
}
public Map getOptions() {
return Collections.unmodifiableMap(this.options);
}
public int getOptionValue(String optionName) {
for (Entry entry : this.options.entrySet()) {
// case-insensitive?
if (entry.getKey().equals(optionName)) {
return entry.getValue();
}
}
throw new IllegalArgumentException("Unknown option: " + optionName);
}
public int requireValidOptionValue(int value) {
for (int v : this.options.values()) {
if (v == value) {
return value;
}
}
throw new IllegalArgumentException("Invalid option: " + value);
}
public void setIndex(int index) {
if (index < 0) {
throw new IllegalArgumentException("Column index is zero-based and should never be negative.");
}
if (this.index == -1) {
this.index = index;
} else {
throw new IllegalStateException("Column index can only be set once!");
}
}
public int getIndex() {
return this.index;
}
public boolean isIndexed() {
return this.index != -1;
}
public void writeValueTo(ByteBuffer buffer) {
if (buffer == null) {
return;
}
if (this.isNullable()) {
buffer.writeNonNull();
}
this.value.writeValueTo(buffer, this.getPrecision(), this.getScale(), this.getTimeZone());
}
JsonObject toJson() {
JsonObject col = new JsonObject();
col.put(CONF_NAME, this.getName());
col.put(CONF_TYPE, this.getType().name());
col.put(CONF_NULLABLE, this.isNullable());
switch (this.getType()) {
case FixedStr:
col.put(CONF_LENGTH, this.getLength());
break;
case DateTime:
if (this.getTimeZone() != null) {
col.put(CONF_TIMEZONE, this.getTimeZone().getID());
}
break;
case Decimal:
col.put(CONF_PRECISION, this.getPrecision());
case Decimal32:
case Decimal64:
case Decimal128:
case Decimal256:
case DateTime64:
col.put(CONF_SCALE, this.getScale());
break;
default:
break;
}
if (this.hasDefaultValue) {
col.put(CONF_VALUE, this.getValue());
}
return col;
}
@Override
public String toString() {
StringBuilder sb = new StringBuilder();
char quote = '`';
sb.append(quote);
for (int i = 0; i < this.name.length(); i++) {
char ch = this.name.charAt(i);
if (ch == quote) {
sb.append(quote).append(quote);
} else {
sb.append(ch);
}
}
sb.append(quote).append(' ');
int index = sb.length();
switch (this.type) {
case Bool:
sb.append(DataType.ALIAS_BOOLEAN);
break;
case FixedStr:
sb.append(DataType.ALIAS_FIXED_STRING);
break;
case Str:
sb.append(DataType.ALIAS_STRING);
break;
default:
sb.append(this.type.name());
break;
}
if (this.type == DataType.Enum || this.type == DataType.Enum8 || this.type == DataType.Enum16) {
sb.append('(');
boolean isNotFirst = false;
for (Map.Entry entry : this.options.entrySet()) {
if (isNotFirst) {
sb.append(',');
} else {
isNotFirst = true;
}
sb.append('\'');
String optName = entry.getKey();
for (int i = 0, len = optName.length(); i < len; i++) {
char ch = optName.charAt(i);
if (ch == '\\' || ch == '\'') {
sb.append('\\');
}
sb.append(ch);
}
sb.append('\'').append('=').append(entry.getValue());
}
sb.append(')');
} else if (this.type == DataType.Decimal) {
sb.append('(').append(this.precision).append(',').append(this.scale).append(')');
} else if (this.type == DataType.Decimal32 || this.type == DataType.Decimal64
|| this.type == DataType.Decimal128 || this.type == DataType.Decimal256) {
sb.append('(').append(this.scale).append(')');
} else if (this.type == DataType.DateTime && this.timezone != null) {
sb.append('(').append('\'').append(this.timezone.getID()).append('\'').append(')');
} else if (this.type == DataType.DateTime64) {
sb.append('(').append(this.scale);
if (this.timezone != null) {
sb.append(',').append('\'').append(this.timezone.getID()).append('\'');
}
sb.append(')');
} else if (this.type == DataType.FixedStr) {
sb.append('(').append(this.length).append(')');
}
if (this.nullable) {
sb.insert(index, NULLABLE_BEGIN).append(NULLABLE_END);
}
if (this.hasDefaultValue) {
sb.append(TOKEN_DEFAULT);
if (this.type == DataType.Str || this.type == DataType.FixedStr || this.type == DataType.UUID
|| this.type == DataType.IPv6 || this.type == DataType.Enum || this.type == DataType.Enum8
|| this.type == DataType.Enum16) {
Object value = this.getValue();
if (value == null || value instanceof Number) {
sb.append(value);
} else {
String str = String.valueOf(value);
sb.append('\'');
boolean escaped = false;
for (int i = 0; i < str.length(); i++) {
char ch = str.charAt(i);
if (ch == '\\') {
escaped = !escaped;
} else if (!escaped && ch == '\'') {
sb.append('\\');
}
sb.append(ch);
}
sb.append('\'');
}
} else {
sb.append(this.getValue());
}
}
return sb.toString();
}
@Override
public int hashCode() {
final int prime = 31;
int result = 1;
result = prime * result + (hasDefaultValue ? 1231 : 1237);
result = prime * result + index;
result = prime * result + ((name == null) ? 0 : name.hashCode());
result = prime * result + (nullable ? 1231 : 1237);
result = prime * result + length;
result = prime * result + precision;
result = prime * result + scale;
result = prime * result + ((timezone == null) ? 0 : timezone.hashCode());
result = prime * result + ((type == null) ? 0 : type.hashCode());
result = prime * result + ((value == null) ? 0 : value.hashCode());
return result;
}
@Override
public boolean equals(Object obj) {
if (this == obj)
return true;
if (obj == null || getClass() != obj.getClass())
return false;
ColumnDefinition other = (ColumnDefinition) obj;
return (index == other.index && nullable == other.nullable && length == other.length
&& precision == other.precision && hasDefaultValue == other.hasDefaultValue && scale == other.scale
&& type == other.type && (name == other.name || (name != null && name.equals(other.name)))
&& (timezone == other.timezone || (timezone != null && timezone.equals(other.timezone)))
&& (value == other.value || (value != null && value.equals(other.value))));
}
}
