gvsig-sqlite / trunk / org.gvsig.spatialite / org.gvsig.spatialite.provider / src / main / java / org / gvsig / spatialite / dal / SpatiaLiteSQLBuilder.java @ 138
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package org.gvsig.spatialite.dal; |
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import java.sql.PreparedStatement; |
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import java.text.MessageFormat; |
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import java.util.ArrayList; |
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import java.util.Date; |
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import java.util.List; |
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import org.gvsig.fmap.dal.DataTypes; |
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import org.gvsig.fmap.dal.feature.FeatureAttributeDescriptor; |
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import org.gvsig.fmap.dal.feature.FeatureType; |
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import org.gvsig.fmap.dal.feature.spi.FeatureProvider; |
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import org.gvsig.fmap.dal.store.jdbc2.spi.JDBCSQLBuilderBase; |
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import org.gvsig.fmap.geom.Geometry; |
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import org.gvsig.tools.dispose.Disposable; |
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import org.apache.commons.lang3.tuple.Pair; |
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import org.gvsig.fmap.dal.store.jdbc.JDBCStoreParameters; |
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public class SpatiaLiteSQLBuilder extends JDBCSQLBuilderBase { |
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public SpatiaLiteSQLBuilder(SpatiaLiteHelper helper) {
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super(helper);
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//
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// SpatiaLite 4.3.0, SQL functions reference list
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//
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// http://www.gaia-gis.it/gaia-sins/spatialite-sql-4.3.0.html
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//
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// https://sqlite.org/lang.html
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//
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config.set(SQLConfig.default_schema, "");
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config.set(SQLConfig.support_schemas, false);
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config.set(SQLConfig.allowAutomaticValues, true);
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config.set(SQLConfig.geometry_type_support, this.helper.getGeometrySupportType());
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config.set(SQLConfig.has_spatial_functions, this.helper.hasSpatialFunctions());
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config.remove_functionality(SQLConfig.DELETE_GEOMETRY_COLUMN_FROM_TABLE_schema_table); |
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config.remove_functionality(SQLConfig.DELETE_GEOMETRY_COLUMN_FROM_TABLE_table); |
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config.set(SQLConfig.UPDATE_TABLE_STATISTICS_table,"SELECT UpdateLayerStatistics({0})");
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config.set(SQLConfig.ST_GeomFromEWKB, "GeomFromWKB({0}, {1})");
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config.set(SQLConfig.ST_AsEWKB, "AsEWKB(({0}))");
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config.set(SQLConfig.ST_ExtentAggregate, "Extent({0})");
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config.set(SQLConfig.ST_UnionAggregate, "ST_Union({0})");
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config.set(SQLConfig.lcase, "lower({0})");
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config.set(SQLConfig.ucase, "upper({0})");
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config.set(SQLConfig.operator_ILIKE, "lower({0}) LIKE lower({1})");
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config.set(SQLConfig.isNull, "( ({0}) ISNULL )");
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config.set(SQLConfig.notIsNull, "( ({0}) NOT NULL )");
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config.set(SQLConfig.type_boolean, "INTEGER");
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config.set(SQLConfig.type_byte, "INTEGER");
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config.set(SQLConfig.type_bytearray, "");
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config.set(SQLConfig.type_geometry, "BLOB");
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config.set(SQLConfig.type_char, "TEXT");
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config.set(SQLConfig.type_date, "INTEGER");
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config.set(SQLConfig.type_double, "REAL");
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config.set(SQLConfig.type_numeric_p, "REAL");
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config.set(SQLConfig.type_numeric_ps, "REAL");
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config.set(SQLConfig.type_bigdecimal, "REAL");
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config.set(SQLConfig.type_float, "REAL");
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config.set(SQLConfig.type_int, "INTEGER");
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config.set(SQLConfig.type_long, "INTEGER");
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config.set(SQLConfig.type_string, "TEXT");
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config.set(SQLConfig.type_string_p, "TEXT");
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config.set(SQLConfig.type_time, "INTEGER");
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config.set(SQLConfig.type_timestamp, "INTEGER");
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config.set(SQLConfig.type_version, "TEXT");
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config.set(SQLConfig.type_URI, "TEXT");
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config.set(SQLConfig.type_URL, "TEXT");
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config.set(SQLConfig.type_FILE, "TEXT");
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config.set(SQLConfig.type_FOLDER, "TEXT");
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} |
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public class SpatiaLiteTableNameBuilderBase extends TableNameBuilderBase { |
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@Override
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public boolean has_schema() { |
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return false; |
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} |
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@Override
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public boolean has_database() { |
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return false; |
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} |
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} |
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protected class SpatiaLiteCreateTableBuilder extends CreateTableBuilderBase { |
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@Override
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public List<String> toStrings() { |
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//
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// Respecto al base cambia la declaracion de campo automaticos:
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// - Los campos se crean autom?ticamente como SERIAL si son INTEGER PRIMARY KEY.
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// - Existe la palabra clave AUTOINCREMENT que se puede usar
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// en los campos INTEGER PRIMARY KEY, pero no se recomienda su uso (penaliza el rendimiento).
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// - Spatialite no permite definir SERIALs para el resto de campos.
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// - Hay que usar la funcion AddGeometryColumn para a?adir las columnas de tipo geometria
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// - El orden en el que hay que declarar las constrains tambien cambia
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// respecto al que hay por defecto.
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//
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List<String> sqls = new ArrayList<>(); |
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StringBuilder builder = new StringBuilder(); |
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builder.append("CREATE TABLE ");
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builder.append(this.table.toString());
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builder.append(" (");
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boolean first = true; |
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for (ColumnDescriptor column : columns) {
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if( column.isGeometry() ) {
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continue;
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} |
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if (first) {
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first = false;
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} else {
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builder.append(", ");
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} |
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builder.append(identifier(column.getName())); |
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builder.append(" ");
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builder.append(sqltype(column.getType(), column.getPrecision(), column.getSize(), column.getGeometryType(), column.getGeometrySubtype())); |
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if (column.isPrimaryKey()) {
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builder.append(" PRIMARY KEY");
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} |
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if (column.getDefaultValue() == null) { |
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if (column.allowNulls()) {
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builder.append(" DEFAULT NULL");
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} |
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} else {
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if( column.getType() == DataTypes.DATE ) {
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builder.append(" DEFAULT ( date('");
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builder.append(column.getDefaultValue().toString()); |
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builder.append("') )");
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} else {
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builder.append(" DEFAULT '");
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builder.append(column.getDefaultValue().toString()); |
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builder.append("'");
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} |
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} |
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if (!column.allowNulls()) {
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builder.append(" NOT NULL");
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} |
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} |
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builder.append(" )");
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sqls.add(builder.toString()); |
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String AddGeometryColumn = "SELECT AddGeometryColumn({0} , {1} , {2,number,#######} , {3}, {4}, {5})"; |
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for (ColumnDescriptor column : columns) {
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if( column.isGeometry() ) {
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String sql = MessageFormat.format( |
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AddGeometryColumn, |
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this.table.toString(),
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identifier(column.getName()), |
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column.getGeometrySRSId(), |
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constant(sqlgeometrytype(column.getGeometryType(), column.getGeometrySubtype())), |
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constant(sqlgeometrydimension(column.getGeometryType(), column.getGeometrySubtype())), |
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column.allowNulls()? 0:1 |
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); |
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sqls.add(sql); |
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} |
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} |
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return sqls;
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} |
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} |
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public class SpatiaLiteSelectBuilderBase extends SelectBuilderBase { |
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@Override
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protected boolean isValid(StringBuilder message) { |
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if( message == null ) { |
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message = new StringBuilder(); |
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} |
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if( this.has_offset() && !this.has_order_by() ) { |
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// Algunos gestores de BBDD requieren que se especifique un
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// orden para poder usar OFFSET. Como eso parece buena idea para
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// asegurar que siempre tengamos los mismo resultados, lo exijimos
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// siempre.
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message.append("Can't use OFFSET without an ORDER BY.");
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return false; |
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} |
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return true; |
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} |
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@Override
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public String toString() { |
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// SpatiaLite requiere que si se especifica OFFSET deba especificarse
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// LIMIT obligatoriamente. Se le puede poner un LIMIT -1 cuando
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// queramos un OFFSET sin especificar un LIMIT.
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StringBuilder builder = new StringBuilder(); |
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if( !isValid(builder) ) {
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throw new IllegalStateException(builder.toString()); |
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} |
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builder.append("SELECT ");
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if( this.distinct ) { |
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builder.append("DISTINCT ");
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} |
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boolean first = true; |
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for (SelectColumnBuilder column : columns) {
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if (first) {
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first = false;
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} else {
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builder.append(", ");
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} |
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builder.append(column.toString()); |
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} |
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if ( this.has_from() ) { |
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builder.append(" FROM ");
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builder.append(this.from.toString());
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} |
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if ( this.has_where() ) { |
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builder.append(" WHERE ");
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builder.append(this.where.toString());
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} |
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if( this.has_order_by() ) { |
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builder.append(" ORDER BY ");
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first = true;
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for (OrderByBuilder item : this.order_by) { |
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if (first) {
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first = false;
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} else {
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builder.append(", ");
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} |
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builder.append(item.toString()); |
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} |
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} |
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if ( this.has_limit() && this.has_offset() ) { |
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builder.append(" LIMIT ");
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builder.append(this.limit);
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builder.append(" OFFSET ");
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builder.append(this.offset);
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} else if ( this.has_limit()) { |
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builder.append(" LIMIT ");
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builder.append(this.limit);
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} else if ( this.has_offset() ) { |
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builder.append(" LIMIT -1 OFFSET ");
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builder.append(this.offset);
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} |
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return builder.toString();
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} |
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} |
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@Override
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public String bytearray(byte[] data) { |
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// SpatiaLite usa un formato diferencte para especificar un array de
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// bytes. En lugar de 0x... usa x'...' .
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StringBuilder builder = new StringBuilder(); |
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builder.append("x'");
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for (byte abyte : data) { |
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int v = abyte & 0xff; |
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builder.append(String.format("%02x", v)); |
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} |
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builder.append("'");
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return builder.toString();
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} |
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@Override
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public Object sqlgeometrydimension(int type, int subtype) { |
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//'XY' or 2: 2D points, identified by X and Y coordinates
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//'XYM': 2D points, identified by X and Y coordinates. Each point stores an M-value (measure) as well
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//'XYZ' or 3: 3D points, identified by X, Y and Z coordinates
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//'XYZM' or 4: 3D points, identified by X, Y and Z coordinates. Each point stores an M-value (measure) as well
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switch(subtype) {
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case Geometry.SUBTYPES.GEOM2D:
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default:
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return "XY"; |
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case Geometry.SUBTYPES.GEOM2DM:
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return "XYM"; |
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case Geometry.SUBTYPES.GEOM3D:
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return "XYZ"; |
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case Geometry.SUBTYPES.GEOM3DM:
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return "XYZM"; |
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} |
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} |
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public SpatiaLiteHelper getHelper() {
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return (SpatiaLiteHelper) this.helper; |
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} |
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@Override
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public Disposable setParameters(PreparedStatement st, FeatureProvider feature) { |
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try {
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FeatureType featureType = feature.getType(); |
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List<Object> values = new ArrayList<>(); |
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for (Parameter parameter : this.getParameters()) { |
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if (parameter.is_constant()) {
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values.add(parameter.getValue()); |
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} else {
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String name = parameter.getName();
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FeatureAttributeDescriptor descriptor = featureType.getAttributeDescriptor(name); |
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switch( descriptor.getType() ) {
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case DataTypes.DATE:
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Date value = (Date)(feature.get(name)); |
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if( value == null ) { |
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values.add(null);
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} else {
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values.add(value.getTime()); |
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} |
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break;
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case DataTypes.GEOMETRY:
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Geometry geom = this.getHelper().forceGeometryType(
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descriptor.getGeomType(), |
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(Geometry)(feature.get(name)) |
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); |
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values.add(geom); |
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break;
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default:
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values.add(feature.get(name)); |
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break;
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} |
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} |
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} |
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return this.setStatementParameters(st, values, this.geometry_support_type()); |
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} catch (Exception ex) { |
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String f = "unknow"; |
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try {
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f = feature.toString(); |
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} catch (Exception ex2) { |
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// Do nothing
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} |
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throw new RuntimeException("Can't set parameters to prepared statement from the feature (" + f + ")", ex); |
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} |
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} |
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public class SpatiaLiteCreateIndexBuilder extends CreateIndexBuilderBase { |
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@Override
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public List<String> toStrings() { |
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List<String> sqls = new ArrayList<>(); |
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if( this.isSpatial && this.columns.size()==1) { |
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StringBuilder builder = new StringBuilder(); |
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builder.append("SELECT CreateSpatialIndex('");
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builder.append(this.table().getName());
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builder.append("', '");
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builder.append(this.columns.get(0)); |
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builder.append("')");
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sqls.add(builder.toString()); |
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} else {
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StringBuilder builder = new StringBuilder(); |
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builder.append("CREATE ");
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if( this.isUnique ) { |
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builder.append("UNIQUE ");
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} |
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builder.append("INDEX ");
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if( this.ifNotExist ) { |
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builder.append("IF NOT EXISTS ");
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} |
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builder.append(identifier(this.indexName));
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builder.append(" ON ");
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builder.append(this.table.toString());
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builder.append(" ( ");
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boolean is_first_column = true; |
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for( String column : this.columns) { |
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if( is_first_column ) {
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is_first_column = false;
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} else {
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builder.append(", ");
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} |
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builder.append(column); |
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} |
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builder.append(" )");
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sqls.add(builder.toString()); |
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} |
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return sqls;
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} |
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} |
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@Override
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protected TableNameBuilder createTableNameBuilder() {
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return new SpatiaLiteTableNameBuilderBase(); |
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} |
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@Override
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protected CreateTableBuilder createCreateTableBuilder() {
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return new SpatiaLiteCreateTableBuilder(); |
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} |
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@Override
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protected SelectBuilder createSelectBuilder() {
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return new SpatiaLiteSelectBuilderBase(); |
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} |
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@Override
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protected CreateIndexBuilder createCreateIndexBuilder() {
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return new SpatiaLiteCreateIndexBuilder(); |
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} |
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@Override
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protected AlterTableBuilder createAlterTableBuilder() {
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return new SpatialiteAlterTableBuilder(); |
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} |
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public class SpatialiteAlterTableBuilder extends AlterTableBuilderBase { |
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@Override
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public List<String> toStrings() { |
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// Notes:
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// - Alter column is not supported in SQLite
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// - Fields are automatically created as serial if they are INTEGER PRIMARY KEY
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// - It is not possible to define serial fields for other columns
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List<String> sqls = new ArrayList<>(); |
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if( this.isEmpty() ) { |
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return sqls;
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} |
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for (String column : drops) { |
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StringBuilder builder = new StringBuilder(); |
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builder.append("ALTER TABLE ");
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builder.append(this.table.toString());
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builder.append(" DROP COLUMN IF EXISTS ");
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builder.append(identifier(column)); |
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sqls.add(builder.toString()); |
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} |
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for (ColumnDescriptor column : adds) {
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if (column.isGeometry()) {
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String addGeometryColumn = "SELECT AddGeometryColumn({0} , {1} , {2,number,#######}, {3}, {4}, {5})"; |
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String sql = MessageFormat.format( |
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addGeometryColumn, |
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this.table.toString(),
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identifier(column.getName()), |
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column.getGeometrySRSId(), |
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constant(sqlgeometrytype(column.getGeometryType(), column.getGeometrySubtype())), |
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constant(sqlgeometrydimension(column.getGeometryType(), column.getGeometrySubtype())), |
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column.allowNulls()? 0:1 |
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); |
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sqls.add(sql); |
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} |
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else {
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StringBuilder builder = new StringBuilder(); |
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builder.append("ALTER TABLE ");
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builder.append(this.table.toString());
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builder.append(" ADD COLUMN ");
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builder.append(identifier(column.getName())); |
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builder.append(" ");
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builder.append( |
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sqltype( |
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column.getType(), |
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column.getPrecision(), |
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column.getSize(), |
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column.getGeometryType(), |
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column.getGeometrySubtype() |
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) |
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); |
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if (column.getDefaultValue() == null) { |
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if (column.allowNulls()) {
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builder.append(" DEFAULT NULL");
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} |
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} else {
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builder.append(" DEFAULT '");
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builder.append(column.getDefaultValue().toString()); |
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builder.append("'");
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} |
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if (column.allowNulls()) {
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builder.append(" NULL");
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} else {
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builder.append(" NOT NULL");
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} |
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if (column.isPrimaryKey()) {
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builder.append(" PRIMARY KEY");
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} |
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sqls.add(builder.toString()); |
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} |
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} |
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for (Pair<String,String> pair : renames) { |
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StringBuilder builder = new StringBuilder(); |
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builder.append("ALTER TABLE ");
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builder.append(this.table.toString());
|
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builder.append(" RENAME COLUMN ");
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builder.append(identifier(pair.getLeft())); |
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builder.append(" TO ");
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builder.append(identifier(pair.getRight())); |
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sqls.add(builder.toString()); |
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} |
| 481 |
return sqls;
|
| 482 |
} |
| 483 |
} |
| 484 |
|
| 485 |
private ColumnDescriptor getDescriptorForUseInIndex(Value arg) {
|
| 486 |
if( arg instanceof Variable ) { |
| 487 |
ColumnDescriptor descriptor = ((Variable)arg).getDescriptor(); |
| 488 |
if( descriptor.getType()==DataTypes.GEOMETRY && descriptor.isIndexed() ) {
|
| 489 |
return descriptor;
|
| 490 |
} |
| 491 |
} |
| 492 |
// Aqui probablemente estaria bien comprobar si el argumento es la funcion
|
| 493 |
// ST_Envelope sobre un campo geometria y tambien usar el indice espacial
|
| 494 |
// para cubrir el caso que se use algo como:
|
| 495 |
// ST_Intersecta(x, ST_Envelope("geom"))
|
| 496 |
return null; |
| 497 |
} |
| 498 |
|
| 499 |
private ColumnDescriptor getDescriptorForUseInIndex(Value... args) {
|
| 500 |
for (Value arg : args) {
|
| 501 |
ColumnDescriptor descriptor = getDescriptorForUseInIndex(arg); |
| 502 |
if( descriptor != null ) { |
| 503 |
return descriptor;
|
| 504 |
} |
| 505 |
} |
| 506 |
return null; |
| 507 |
} |
| 508 |
|
| 509 |
@Override
|
| 510 |
public Function ST_Intersects(Value geom1, Value geom2) {
|
| 511 |
// return super.ST_Intersects(geom1, geom2);
|
| 512 |
JDBCStoreParameters jdbcparams = null;
|
| 513 |
ColumnDescriptor descriptor = getDescriptorForUseInIndex(geom1, geom2); |
| 514 |
|
| 515 |
if( descriptor != null ) { |
| 516 |
jdbcparams = (JDBCStoreParameters) descriptor.getStoreParameters(); |
| 517 |
} |
| 518 |
Function f; |
| 519 |
if( jdbcparams!=null ) { |
| 520 |
// Usamos indices espaciales
|
| 521 |
f = function( |
| 522 |
"ST_Intersects",
|
| 523 |
"(ST_Intersects({0},{1}) AND ROWID IN ( SELECT ROWID FROM SpatialIndex WHERE f_table_name = ''"+jdbcparams.getTable()+"'' AND f_geometry_column = ''"+descriptor.getName()+"'' AND search_frame = \""+jdbcparams.getTable()+"\".\""+descriptor.getName()+"\"))", |
| 524 |
geom1, |
| 525 |
geom2 |
| 526 |
); |
| 527 |
} else {
|
| 528 |
f = super.ST_Intersects(geom1, geom2);
|
| 529 |
} |
| 530 |
return f;
|
| 531 |
} |
| 532 |
} |