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@nyalldawson
nyalldawson committed Mar 20, 2021
1 parent 22aa733 commit 44936ef
Showing 1 changed file with 27 additions and 37 deletions.
64 changes: 27 additions & 37 deletions src/providers/postgres/raster/qgspostgresrasterprovider.cpp
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Expand Up @@ -1005,14 +1005,13 @@ bool QgsPostgresRasterProvider::init()
{
try
{
const QString sql { QStringLiteral( "SELECT r_raster_column, srid,"
"num_bands, pixel_types, nodata_values, ST_AsBinary(extent), blocksize_x, blocksize_y,"
"out_db, spatial_index, scale_x, scale_y, same_alignment,"
"regular_blocking "
"FROM raster_columns WHERE "
"r_table_name = %1 AND r_table_schema = %2" )
.arg( quotedValue( mTableName ) )
.arg( quotedValue( mSchemaName ) ) };
const QString sql = QStringLiteral( "SELECT r_raster_column, srid,"
"num_bands, pixel_types, nodata_values, ST_AsBinary(extent), blocksize_x, blocksize_y,"
"out_db, spatial_index, scale_x, scale_y, same_alignment,"
"regular_blocking "
"FROM raster_columns WHERE "
"r_table_name = %1 AND r_table_schema = %2" )
.arg( quotedValue( mTableName ), quotedValue( mSchemaName ) );

QgsPostgresResult result( connectionRO()->PQexec( sql ) );

Expand Down Expand Up @@ -1182,10 +1181,9 @@ bool QgsPostgresRasterProvider::init()
//
if ( mRasterColumn.isEmpty() )
{
const QString sql { QStringLiteral( "SELECT column_name FROM information_schema.columns WHERE "
"table_name = %1 AND table_schema = %2 AND udt_name = 'raster'" )
.arg( quotedValue( mTableName ) )
.arg( quotedValue( mSchemaName ) )};
const QString sql = QStringLiteral( "SELECT column_name FROM information_schema.columns WHERE "
"table_name = %1 AND table_schema = %2 AND udt_name = 'raster'" )
.arg( quotedValue( mTableName ), quotedValue( mSchemaName ) );

QgsPostgresResult result( connectionRO()->PQexec( sql ) );

Expand Down Expand Up @@ -1230,16 +1228,15 @@ bool QgsPostgresRasterProvider::init()
// Fastest SQL: fetch all metadata in one pass
// 0 1 3 3 4 5 6 7 8 9 10 11 12 13 14
// encode | upperleftx | upperlefty | width | height | scalex | scaley | skewx | skewy | srid | numbands | pixeltype | nodatavalue | isoutdb | path
const QString sql { QStringLiteral( R"(
const QString sql = QStringLiteral( R"(
WITH cte_filtered_raster AS ( SELECT %1 AS filtered_rast FROM %2 %3 ),
cte_rast AS ( SELECT ST_Union( cte_filtered_raster.filtered_rast ) AS united_raster FROM cte_filtered_raster ),
cte_bandno AS ( SELECT * FROM generate_series(1, ST_NumBands ( ( SELECT cte_rast.united_raster FROM cte_rast ) ) ) AS bandno ),
cte_band AS ( SELECT ST_Band( united_raster, bandno ) AS band FROM cte_rast, cte_bandno )
SELECT ENCODE( ST_AsBinary( ST_Envelope( band ) ), 'hex'),
(ST_Metadata( band )).*,
(ST_BandMetadata( band )).*
FROM cte_band
)" ).arg( quotedIdentifier( mRasterColumn ), tableToQuery, where ) };
FROM cte_band)" ).arg( quotedIdentifier( mRasterColumn ), tableToQuery, where );

QgsDebugMsgLevel( QStringLiteral( "Raster information sql: %1" ).arg( sql ), 4 );

Expand Down Expand Up @@ -1403,11 +1400,10 @@ bool QgsPostgresRasterProvider::initFieldsAndTemporal( )
{
const QString temporalFieldName { mAttributeFields.field( temporalFieldIndex ).name() };
// Calculate the range
const QString sql { QStringLiteral( "SELECT MIN(%1::timestamp), MAX(%1::timestamp) "
"FROM %2 %3" )
.arg( quotedIdentifier( temporalFieldName ) )
.arg( mQuery )
.arg( where )};
const QString sql = QStringLiteral( "SELECT MIN(%1::timestamp), MAX(%1::timestamp) "
"FROM %2 %3" ).arg( quotedIdentifier( temporalFieldName ),
mQuery,
where );

QgsPostgresResult result( connectionRO()->PQexec( sql ) );

Expand Down Expand Up @@ -2155,11 +2151,9 @@ void QgsPostgresRasterProvider::determinePrimaryKeyFromUriKeyColumn()
mPrimaryKeyAttrs.clear();
const QString keyCandidate { mUri.keyColumn() };
QgsPostgresPrimaryKeyType pkType { QgsPostgresPrimaryKeyType::PktUnknown };
const QString sql { QStringLiteral( "SELECT data_type FROM information_schema.columns "
"WHERE column_name = %1 AND table_name = %2 AND table_schema = %3" )
.arg( keyCandidate )
.arg( mTableName )
.arg( mSchemaName ) };
const QString sql = QStringLiteral( "SELECT data_type FROM information_schema.columns "
"WHERE column_name = %1 AND table_name = %2 AND table_schema = %3" )
.arg( keyCandidate, mTableName, mSchemaName );
QgsPostgresResult result( connectionRO()->PQexec( sql ) );
if ( PGRES_TUPLES_OK == result.PQresultStatus() )
{
Expand Down Expand Up @@ -2204,10 +2198,9 @@ QString QgsPostgresRasterProvider::dataComment() const

void QgsPostgresRasterProvider::findOverviews()
{
const QString sql { QStringLiteral( "SELECT overview_factor, o_table_schema, o_table_name, o_raster_column "
"FROM raster_overviews WHERE r_table_schema = %1 AND r_table_name = %2" )
.arg( quotedValue( mSchemaName ) )
.arg( quotedValue( mTableName ) ) };
const QString sql = QStringLiteral( "SELECT overview_factor, o_table_schema, o_table_name, o_raster_column "
"FROM raster_overviews WHERE r_table_schema = %1 AND r_table_name = %2" ).arg( quotedValue( mSchemaName ),
quotedValue( mTableName ) );

//QgsDebugMsg( QStringLiteral( "Raster overview information sql: %1" ).arg( sql ) );
QgsPostgresResult result( connectionRO()->PQexec( sql ) );
Expand Down Expand Up @@ -2340,14 +2333,11 @@ QgsRasterBandStats QgsPostgresRasterProvider::bandStatistics( int bandNo, int st
QStringLiteral( " AND %1" ).arg( subsetString() ) );
}

const QString sql { QStringLiteral( "SELECT (ST_SummaryStatsAgg( %1, %2, TRUE, %3 )).* "
"FROM %4 %5" )
.arg( quotedIdentifier( mRasterColumn ) )
.arg( bandNo )
.arg( std::max<double>( 0, std::min<double>( 1, statsRatio ) ) )
.arg( tableToQuery )
.arg( where )
};
const QString sql = QStringLiteral( "SELECT (ST_SummaryStatsAgg( %1, %2, TRUE, %3 )).* "
"FROM %4 %5" ).arg( quotedIdentifier( mRasterColumn ) )
.arg( bandNo )
.arg( std::max<double>( 0, std::min<double>( 1, statsRatio ) ) )
.arg( tableToQuery, where );

QgsPostgresResult result( connectionRO()->PQexec( sql ) );

Expand Down

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