sqlite-parquet-vtable/parquet-generator/create-pg-db

#!/bin/bash

set -euo pipefail

export PGUSER=postgres

dropdb parquet || true
createdb parquet

here=$(readlink -f "$(dirname "${BASH_SOURCE[0]}")")

psql parquet << EOF
CREATE TABLE no_nulls1(
  rowid INT2,
  bool_0 INT2,
  int8_1 INT2,
  int16_2 INT2,
  int32_3 INT4,
  int64_4 INT8,
  ts_5 int8,
  double_6 DOUBLE PRECISION,
  string_7 TEXT,
  string_8 TEXT,
  binary_9 TEXT,
  binary_10 TEXT
);

CREATE TABLE no_nulls2 (LIKE no_nulls1);
CREATE TABLE nulls (LIKE no_nulls1);

COPY no_nulls1 FROM '$here/no-nulls.csv';
COPY no_nulls2 FROM '$here/no-nulls.csv';
COPY nulls FROM '$here/nulls.csv';

CREATE OR REPLACE FUNCTION quote(TEXT) RETURNS TEXT AS \$\$
  BEGIN
    RETURN CASE WHEN \$1 IS NULL THEN 'NULL' ELSE \$1 END;
  END;
\$\$ LANGUAGE 'plpgsql' IMMUTABLE;

CREATE OR REPLACE FUNCTION datetime(INT8, TEXT) RETURNS TEXT AS \$\$
  BEGIN
    RETURN to_timestamp(\$1) AT TIME ZONE 'UTC';
  END;
\$\$ LANGUAGE 'plpgsql' IMMUTABLE;

CREATE OR REPLACE FUNCTION printf(TEXT, DOUBLE PRECISION) RETURNS TEXT AS \$\$
  BEGIN
    RETURN CAST(\$2 AS DECIMAL(10, 4))::TEXT;
  END;
\$\$ LANGUAGE 'plpgsql' IMMUTABLE;
EOF